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NFC: Prevent polling when device is down
[deliverable/linux.git] / drivers / nfc / pn533.c
CommitLineData
c46ee386
AAJ		 1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
e70b96e9 3 * Copyright (C) 2012-2013 Tieto Poland
c46ee386
AAJ		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the
17 * Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21#include <linux/device.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/slab.h>
25#include <linux/usb.h>
26#include <linux/nfc.h>
27#include <linux/netdevice.h>
55eb94f9 28#include <net/nfc/nfc.h>
c46ee386 29
495af72e 30#define VERSION "0.2"
c46ee386
AAJ		 31
32#define PN533_VENDOR_ID 0x4CC
33#define PN533_PRODUCT_ID 0x2533
34
35#define SCM_VENDOR_ID 0x4E6
36#define SCL3711_PRODUCT_ID 0x5591
37
5c7b0531
SO		 38#define SONY_VENDOR_ID 0x054c
39#define PASORI_PRODUCT_ID 0x02e1
40
53cf4839
WR		 41#define ACS_VENDOR_ID 0x072f
42#define ACR122U_PRODUCT_ID 0x2200
43
44#define PN533_DEVICE_STD 0x1
45#define PN533_DEVICE_PASORI 0x2
46#define PN533_DEVICE_ACR122U 0x3
5c7b0531 47
01d719a2
SO		 48#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
49 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
50 NFC_PROTO_NFC_DEP_MASK |\
51 NFC_PROTO_ISO14443_B_MASK)
5c7b0531
SO		 52
53#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
54 NFC_PROTO_MIFARE_MASK | \
55 NFC_PROTO_FELICA_MASK | \
01d719a2 56 NFC_PROTO_ISO14443_MASK | \
5c7b0531
SO		 57 NFC_PROTO_NFC_DEP_MASK)
58
c46ee386 59static const struct usb_device_id pn533_table[] = {
5c7b0531
SO		 60 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
61 .idVendor = PN533_VENDOR_ID,
62 .idProduct = PN533_PRODUCT_ID,
63 .driver_info = PN533_DEVICE_STD,
64 },
65 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
66 .idVendor = SCM_VENDOR_ID,
67 .idProduct = SCL3711_PRODUCT_ID,
68 .driver_info = PN533_DEVICE_STD,
69 },
70 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
71 .idVendor = SONY_VENDOR_ID,
72 .idProduct = PASORI_PRODUCT_ID,
73 .driver_info = PN533_DEVICE_PASORI,
74 },
53cf4839
WR		 75 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
76 .idVendor = ACS_VENDOR_ID,
77 .idProduct = ACR122U_PRODUCT_ID,
78 .driver_info = PN533_DEVICE_ACR122U,
79 },
c46ee386
AAJ		 80 { }
81};
82MODULE_DEVICE_TABLE(usb, pn533_table);
83
6fbbdc16
SO		 84/* How much time we spend listening for initiators */
85#define PN533_LISTEN_TIME 2
86
63123108
WR		 87/* Standard pn533 frame definitions */
88#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
b1bb290a 89 + 2) /* data[0] TFI, data[1] CC */
63123108 90#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82dec34d 91
15461aeb
WR		 92/*
93 * Max extended frame payload len, excluding TFI and CC
94 * which are already in PN533_FRAME_HEADER_LEN.
95 */
63123108 96#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
15461aeb 97
63123108 98#define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
5b5a4437 99 Postamble (1) */
63123108
WR		 100#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
101#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
c46ee386
AAJ		 102
103/* start of frame */
63123108 104#define PN533_STD_FRAME_SOF 0x00FF
c46ee386 105
63123108
WR		 106/* standard frame identifier: in/out/error */
107#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
108#define PN533_STD_FRAME_DIR_OUT 0xD4
109#define PN533_STD_FRAME_DIR_IN 0xD5
c46ee386 110
53cf4839
WR		 111/* ACS ACR122 pn533 frame definitions */
112#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
113 + 2)
114#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
115#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
116 + 2)
117#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
118#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
119
120/* CCID messages types */
121#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
122#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
123
124#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
125
c46ee386 126/* PN533 Commands */
63123108 127#define PN533_STD_FRAME_CMD(f) (f->data[1])
c46ee386
AAJ		 128
129#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
130#define PN533_CMD_RF_CONFIGURATION 0x32
131#define PN533_CMD_IN_DATA_EXCHANGE 0x40
5c7b0531 132#define PN533_CMD_IN_COMM_THRU 0x42
c46ee386
AAJ		 133#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
134#define PN533_CMD_IN_ATR 0x50
135#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 136#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 137
ad3823ce 138#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 139#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 140#define PN533_CMD_TG_SET_DATA 0x8e
aada17ac 141#define PN533_CMD_UNDEF 0xff
ad3823ce 142
c46ee386
AAJ		 143#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
144
145/* PN533 Return codes */
146#define PN533_CMD_RET_MASK 0x3F
147#define PN533_CMD_MI_MASK 0x40
148#define PN533_CMD_RET_SUCCESS 0x00
149
150struct pn533;
151
aada17ac
WR		 152typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
153 struct sk_buff *resp);
154
c46ee386
AAJ		 155/* structs for pn533 commands */
156
157/* PN533_CMD_GET_FIRMWARE_VERSION */
158struct pn533_fw_version {
159 u8 ic;
160 u8 ver;
161 u8 rev;
162 u8 support;
163};
164
165/* PN533_CMD_RF_CONFIGURATION */
34a85bfc 166#define PN533_CFGITEM_TIMING 0x02
c46ee386 167#define PN533_CFGITEM_MAX_RETRIES 0x05
5c7b0531 168#define PN533_CFGITEM_PASORI 0x82
c46ee386 169
34a85bfc
SO		 170#define PN533_CONFIG_TIMING_102 0xb
171#define PN533_CONFIG_TIMING_204 0xc
172#define PN533_CONFIG_TIMING_409 0xd
173#define PN533_CONFIG_TIMING_819 0xe
174
c46ee386
AAJ		 175#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
176#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
177
178struct pn533_config_max_retries {
179 u8 mx_rty_atr;
180 u8 mx_rty_psl;
181 u8 mx_rty_passive_act;
182} __packed;
183
34a85bfc
SO		 184struct pn533_config_timing {
185 u8 rfu;
186 u8 atr_res_timeout;
187 u8 dep_timeout;
188} __packed;
189
c46ee386
AAJ		 190/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
191
192/* felica commands opcode */
193#define PN533_FELICA_OPC_SENSF_REQ 0
194#define PN533_FELICA_OPC_SENSF_RES 1
195/* felica SENSF_REQ parameters */
196#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
197#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
198#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
199#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
200
201/* type B initiator_data values */
202#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
203#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
204#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
205
206union pn533_cmd_poll_initdata {
207 struct {
208 u8 afi;
209 u8 polling_method;
210 } __packed type_b;
211 struct {
212 u8 opcode;
213 __be16 sc;
214 u8 rc;
215 u8 tsn;
216 } __packed felica;
217};
218
219/* Poll modulations */
220enum {
221 PN533_POLL_MOD_106KBPS_A,
222 PN533_POLL_MOD_212KBPS_FELICA,
223 PN533_POLL_MOD_424KBPS_FELICA,
224 PN533_POLL_MOD_106KBPS_JEWEL,
225 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 226 PN533_LISTEN_MOD,
c46ee386
AAJ		 227
228 __PN533_POLL_MOD_AFTER_LAST,
229};
230#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
231
232struct pn533_poll_modulations {
233 struct {
234 u8 maxtg;
235 u8 brty;
236 union pn533_cmd_poll_initdata initiator_data;
237 } __packed data;
238 u8 len;
239};
240
ef3d56e1 241static const struct pn533_poll_modulations poll_mod[] = {
c46ee386
AAJ		 242 [PN533_POLL_MOD_106KBPS_A] = {
243 .data = {
244 .maxtg = 1,
245 .brty = 0,
246 },
247 .len = 2,
248 },
249 [PN533_POLL_MOD_212KBPS_FELICA] = {
250 .data = {
251 .maxtg = 1,
252 .brty = 1,
253 .initiator_data.felica = {
254 .opcode = PN533_FELICA_OPC_SENSF_REQ,
255 .sc = PN533_FELICA_SENSF_SC_ALL,
256 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
257 .tsn = 0,
258 },
259 },
260 .len = 7,
261 },
262 [PN533_POLL_MOD_424KBPS_FELICA] = {
263 .data = {
264 .maxtg = 1,
265 .brty = 2,
266 .initiator_data.felica = {
267 .opcode = PN533_FELICA_OPC_SENSF_REQ,
268 .sc = PN533_FELICA_SENSF_SC_ALL,
269 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
270 .tsn = 0,
271 },
272 },
273 .len = 7,
274 },
275 [PN533_POLL_MOD_106KBPS_JEWEL] = {
276 .data = {
277 .maxtg = 1,
278 .brty = 4,
279 },
280 .len = 2,
281 },
282 [PN533_POLL_MOD_847KBPS_B] = {
283 .data = {
284 .maxtg = 1,
285 .brty = 8,
286 .initiator_data.type_b = {
287 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
288 .polling_method =
289 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
290 },
291 },
292 .len = 3,
293 },
6fbbdc16
SO		 294 [PN533_LISTEN_MOD] = {
295 .len = 0,
296 },
c46ee386
AAJ		 297};
298
299/* PN533_CMD_IN_ATR */
300
c46ee386
AAJ		 301struct pn533_cmd_activate_response {
302 u8 status;
303 u8 nfcid3t[10];
304 u8 didt;
305 u8 bst;
306 u8 brt;
307 u8 to;
308 u8 ppt;
309 /* optional */
310 u8 gt[];
311} __packed;
312
361f3cb7
SO		 313struct pn533_cmd_jump_dep_response {
314 u8 status;
315 u8 tg;
316 u8 nfcid3t[10];
317 u8 didt;
318 u8 bst;
319 u8 brt;
320 u8 to;
321 u8 ppt;
322 /* optional */
323 u8 gt[];
324} __packed;
c46ee386 325
ad3823ce
SO		 326
327/* PN533_TG_INIT_AS_TARGET */
328#define PN533_INIT_TARGET_PASSIVE 0x1
329#define PN533_INIT_TARGET_DEP 0x2
330
fc40a8c1
SO		 331#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
332#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
333#define PN533_INIT_TARGET_RESP_DEP 0x4
334
58520373
WR		 335enum pn533_protocol_type {
336 PN533_PROTO_REQ_ACK_RESP = 0,
337 PN533_PROTO_REQ_RESP
338};
339
c46ee386
AAJ		 340struct pn533 {
341 struct usb_device *udev;
342 struct usb_interface *interface;
343 struct nfc_dev *nfc_dev;
d5590bba 344 u32 device_type;
58520373 345 enum pn533_protocol_type protocol_type;
c46ee386
AAJ		 346
347 struct urb *out_urb;
c46ee386 348 struct urb *in_urb;
c46ee386 349
6ff73fd2
SO		 350 struct sk_buff_head resp_q;
351
4849f85e
SO		 352 struct workqueue_struct *wq;
353 struct work_struct cmd_work;
5d50b364 354 struct work_struct cmd_complete_work;
6fbbdc16 355 struct work_struct poll_work;
6ff73fd2 356 struct work_struct mi_work;
103b34cf 357 struct work_struct tg_work;
d5590bba
WR		 358
359 struct list_head cmd_queue;
360 struct pn533_cmd *cmd;
361 u8 cmd_pending;
d5590bba 362 struct mutex cmd_lock; /* protects cmd queue */
c46ee386 363
b1e666f5 364 void *cmd_complete_mi_arg;
c46ee386
AAJ		 365
366 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
367 u8 poll_mod_count;
368 u8 poll_mod_curr;
369 u32 poll_protocols;
6fbbdc16 370 u32 listen_protocols;
d5590bba
WR		 371 struct timer_list listen_timer;
372 int cancel_listen;
6fbbdc16
SO		 373
374 u8 *gb;
375 size_t gb_len;
c46ee386
AAJ		 376
377 u8 tgt_available_prots;
378 u8 tgt_active_prot;
51ad304c 379 u8 tgt_mode;
5c7b0531 380
9e2d493e 381 struct pn533_frame_ops *ops;
5d50b364
SO		 382};
383
384struct pn533_cmd {
385 struct list_head queue;
4b2a9532 386 u8 code;
f87bc9fb 387 int status;
aada17ac
WR		 388 struct sk_buff *req;
389 struct sk_buff *resp;
9e2d493e 390 int resp_len;
4231604b
WR		 391 pn533_send_async_complete_t complete_cb;
392 void *complete_cb_context;
c46ee386
AAJ		 393};
394
63123108 395struct pn533_std_frame {
c46ee386
AAJ		 396 u8 preamble;
397 __be16 start_frame;
398 u8 datalen;
399 u8 datalen_checksum;
400 u8 data[];
401} __packed;
402
9e2d493e
WR		 403struct pn533_frame_ops {
404 void (*tx_frame_init)(void *frame, u8 cmd_code);
405 void (*tx_frame_finish)(void *frame);
406 void (*tx_update_payload_len)(void *frame, int len);
407 int tx_header_len;
408 int tx_tail_len;
409
410 bool (*rx_is_frame_valid)(void *frame);
411 int (*rx_frame_size)(void *frame);
412 int rx_header_len;
413 int rx_tail_len;
414
415 int max_payload_len;
416 u8 (*get_cmd_code)(void *frame);
417};
418
53cf4839
WR		 419struct pn533_acr122_ccid_hdr {
420 u8 type;
421 u32 datalen;
422 u8 slot;
423 u8 seq;
424 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
425 byte for reposnse msg */
426 u8 data[]; /* payload */
427} __packed;
428
429struct pn533_acr122_apdu_hdr {
430 u8 class;
431 u8 ins;
432 u8 p1;
433 u8 p2;
434} __packed;
435
436struct pn533_acr122_tx_frame {
437 struct pn533_acr122_ccid_hdr ccid;
438 struct pn533_acr122_apdu_hdr apdu;
439 u8 datalen;
440 u8 data[]; /* pn533 frame: TFI ... */
441} __packed;
442
443struct pn533_acr122_rx_frame {
444 struct pn533_acr122_ccid_hdr ccid;
445 u8 data[]; /* pn533 frame : TFI ... */
446} __packed;
447
448static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
449{
450 struct pn533_acr122_tx_frame *frame = _frame;
451
452 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
453 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
454 sizeof(datalen) */
455 frame->ccid.slot = 0;
456 frame->ccid.seq = 0;
457 frame->ccid.params[0] = 0;
458 frame->ccid.params[1] = 0;
459 frame->ccid.params[2] = 0;
460
461 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
462 frame->data[1] = cmd_code;
463 frame->datalen = 2; /* data[0] + data[1] */
464
465 frame->apdu.class = 0xFF;
466 frame->apdu.ins = 0;
467 frame->apdu.p1 = 0;
468 frame->apdu.p2 = 0;
469}
470
471static void pn533_acr122_tx_frame_finish(void *_frame)
472{
473 struct pn533_acr122_tx_frame *frame = _frame;
474
475 frame->ccid.datalen += frame->datalen;
476}
477
478static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
479{
480 struct pn533_acr122_tx_frame *frame = _frame;
481
482 frame->datalen += len;
483}
484
485static bool pn533_acr122_is_rx_frame_valid(void *_frame)
486{
487 struct pn533_acr122_rx_frame *frame = _frame;
488
489 if (frame->ccid.type != 0x83)
490 return false;
491
492 if (frame->data[frame->ccid.datalen - 2] == 0x63)
493 return false;
494
495 return true;
496}
497
498static int pn533_acr122_rx_frame_size(void *frame)
499{
500 struct pn533_acr122_rx_frame *f = frame;
501
502 /* f->ccid.datalen already includes tail length */
503 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
504}
505
506static u8 pn533_acr122_get_cmd_code(void *frame)
507{
508 struct pn533_acr122_rx_frame *f = frame;
509
510 return PN533_STD_FRAME_CMD(f);
511}
512
513static struct pn533_frame_ops pn533_acr122_frame_ops = {
514 .tx_frame_init = pn533_acr122_tx_frame_init,
515 .tx_frame_finish = pn533_acr122_tx_frame_finish,
516 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
517 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
518 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
519
520 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
521 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
522 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
523 .rx_frame_size = pn533_acr122_rx_frame_size,
524
525 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
526 .get_cmd_code = pn533_acr122_get_cmd_code,
527};
528
c46ee386 529/* The rule: value + checksum = 0 */
63123108 530static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 531{
532 return ~value + 1;
533}
534
535/* The rule: sum(data elements) + checksum = 0 */
63123108 536static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 537{
538 u8 sum = 0;
539 int i;
540
541 for (i = 0; i < datalen; i++)
542 sum += data[i];
543
63123108 544 return pn533_std_checksum(sum);
c46ee386
AAJ		 545}
546
63123108 547static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 548{
63123108 549 struct pn533_std_frame *frame = _frame;
9e2d493e 550
c46ee386 551 frame->preamble = 0;
63123108
WR		 552 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
553 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
554 PN533_STD_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 555 frame->datalen = 2;
556}
557
63123108 558static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 559{
63123108 560 struct pn533_std_frame *frame = _frame;
9e2d493e 561
63123108 562 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 563
63123108
WR		 564 PN533_STD_FRAME_CHECKSUM(frame) =
565 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 566
63123108 567 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 568}
569
63123108 570static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 571{
63123108 572 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 573
574 frame->datalen += len;
575}
576
63123108 577static bool pn533_std_rx_frame_is_valid(void *_frame)
c46ee386
AAJ		 578{
579 u8 checksum;
63123108 580 struct pn533_std_frame *frame = _frame;
c46ee386 581
63123108 582 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 583 return false;
584
63123108 585 checksum = pn533_std_checksum(frame->datalen);
c46ee386
AAJ		 586 if (checksum != frame->datalen_checksum)
587 return false;
588
63123108
WR		 589 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
590 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
c46ee386
AAJ		 591 return false;
592
593 return true;
594}
595
63123108 596static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 597{
63123108 598 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 599 return false;
600
601 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
602 return false;
603
604 return true;
605}
606
63123108 607static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 608{
63123108 609 struct pn533_std_frame *f = frame;
9e2d493e 610
63123108
WR		 611 return sizeof(struct pn533_std_frame) + f->datalen +
612 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 613}
614
63123108 615static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 616{
63123108 617 struct pn533_std_frame *f = frame;
9e2d493e 618
63123108 619 return PN533_STD_FRAME_CMD(f);
9e2d493e
WR		 620}
621
ef3d56e1 622static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 623 .tx_frame_init = pn533_std_tx_frame_init,
624 .tx_frame_finish = pn533_std_tx_frame_finish,
625 .tx_update_payload_len = pn533_std_tx_update_payload_len,
626 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
627 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
628
629 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
630 .rx_frame_size = pn533_std_rx_frame_size,
631 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
632 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
633
634 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
635 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 636};
637
638static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 639{
2c206fb7 640 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 641 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 642}
643
c46ee386
AAJ		 644static void pn533_recv_response(struct urb *urb)
645{
646 struct pn533 *dev = urb->context;
f87bc9fb 647 struct pn533_cmd *cmd = dev->cmd;
9e2d493e 648 u8 *in_frame;
c46ee386 649
f87bc9fb
WR		 650 cmd->status = urb->status;
651
c46ee386
AAJ		 652 switch (urb->status) {
653 case 0:
f8f99171 654 break; /* success */
c46ee386
AAJ		 655 case -ECONNRESET:
656 case -ENOENT:
6ca55372 657 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 658 "The urb has been canceled (status %d)",
659 urb->status);
4849f85e 660 goto sched_wq;
f8f99171 661 case -ESHUTDOWN:
c46ee386 662 default:
6ca55372 663 nfc_dev_err(&dev->interface->dev,
f8f99171 664 "Urb failure (status %d)", urb->status);
4849f85e 665 goto sched_wq;
c46ee386
AAJ		 666 }
667
668 in_frame = dev->in_urb->transfer_buffer;
669
fcfafc76 670 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
e279f84f
SO		 671 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
672 dev->ops->rx_frame_size(in_frame), false);
99e591be 673
9e2d493e 674 if (!dev->ops->rx_is_frame_valid(in_frame)) {
c46ee386 675 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
f87bc9fb 676 cmd->status = -EIO;
4849f85e 677 goto sched_wq;
c46ee386
AAJ		 678 }
679
9e2d493e 680 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 681 nfc_dev_err(&dev->interface->dev,
682 "It it not the response to the last command");
f87bc9fb 683 cmd->status = -EIO;
4849f85e 684 goto sched_wq;
c46ee386
AAJ		 685 }
686
4849f85e 687sched_wq:
5d50b364 688 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 689}
690
691static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
692{
693 dev->in_urb->complete = pn533_recv_response;
694
695 return usb_submit_urb(dev->in_urb, flags);
696}
697
698static void pn533_recv_ack(struct urb *urb)
699{
700 struct pn533 *dev = urb->context;
f87bc9fb 701 struct pn533_cmd *cmd = dev->cmd;
63123108 702 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 703 int rc;
704
f87bc9fb
WR		 705 cmd->status = urb->status;
706
c46ee386
AAJ		 707 switch (urb->status) {
708 case 0:
f8f99171 709 break; /* success */
c46ee386
AAJ		 710 case -ECONNRESET:
711 case -ENOENT:
6ca55372 712 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 713 "The urb has been stopped (status %d)",
714 urb->status);
4849f85e 715 goto sched_wq;
f8f99171 716 case -ESHUTDOWN:
c46ee386 717 default:
6ca55372 718 nfc_dev_err(&dev->interface->dev,
f8f99171 719 "Urb failure (status %d)", urb->status);
4849f85e 720 goto sched_wq;
c46ee386
AAJ		 721 }
722
723 in_frame = dev->in_urb->transfer_buffer;
724
63123108 725 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 726 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
f87bc9fb 727 cmd->status = -EIO;
4849f85e 728 goto sched_wq;
c46ee386
AAJ		 729 }
730
c46ee386
AAJ		 731 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
732 if (rc) {
6ca55372
WR		 733 nfc_dev_err(&dev->interface->dev,
734 "usb_submit_urb failed with result %d", rc);
f87bc9fb 735 cmd->status = rc;
4849f85e 736 goto sched_wq;
c46ee386
AAJ		 737 }
738
739 return;
740
4849f85e 741sched_wq:
5d50b364 742 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 743}
744
745static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
746{
747 dev->in_urb->complete = pn533_recv_ack;
748
749 return usb_submit_urb(dev->in_urb, flags);
750}
751
752static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
753{
63123108 754 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 755 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 756 int rc;
757
758 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
759
5b5a4437
WR		 760 dev->out_urb->transfer_buffer = ack;
761 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 762 rc = usb_submit_urb(dev->out_urb, flags);
763
764 return rc;
765}
766
e8f40531
WR		 767static int __pn533_send_frame_async(struct pn533 *dev,
768 struct sk_buff *out,
769 struct sk_buff *in,
ddf19d20 770 int in_len)
c46ee386
AAJ		 771{
772 int rc;
773
e8f40531
WR		 774 dev->out_urb->transfer_buffer = out->data;
775 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 776
e8f40531
WR		 777 dev->in_urb->transfer_buffer = in->data;
778 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 779
e279f84f
SO		 780 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
781 out->data, out->len, false);
99e591be 782
d94ea4f5 783 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 784 if (rc)
785 return rc;
786
58520373
WR		 787 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
788 /* request for response for sent packet directly */
789 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
790 if (rc)
791 goto error;
792 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
793 /* request for ACK if that's the case */
794 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
795 if (rc)
796 goto error;
797 }
c46ee386
AAJ		 798
799 return 0;
800
801error:
802 usb_unlink_urb(dev->out_urb);
803 return rc;
804}
805
9e2d493e
WR		 806static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
807 struct sk_buff *skb)
aada17ac 808{
aada17ac
WR		 809 /* payload is already there, just update datalen */
810 int payload_len = skb->len;
9e2d493e 811 struct pn533_frame_ops *ops = dev->ops;
aada17ac 812
aada17ac 813
9e2d493e
WR		 814 skb_push(skb, ops->tx_header_len);
815 skb_put(skb, ops->tx_tail_len);
aada17ac 816
9e2d493e
WR		 817 ops->tx_frame_init(skb->data, cmd_code);
818 ops->tx_update_payload_len(skb->data, payload_len);
819 ops->tx_frame_finish(skb->data);
aada17ac
WR		 820}
821
ddf19d20 822static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 823{
ddf19d20 824 struct pn533_cmd *cmd = dev->cmd;
f87bc9fb 825 int status = cmd->status;
aada17ac 826
4231604b
WR		 827 struct sk_buff *req = cmd->req;
828 struct sk_buff *resp = cmd->resp;
aada17ac 829
aada17ac
WR		 830 int rc;
831
832 dev_kfree_skb(req);
833
0c33d262 834 if (status < 0) {
4231604b
WR		 835 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
836 ERR_PTR(status));
aada17ac 837 dev_kfree_skb(resp);
2c206fb7 838 goto done;
aada17ac
WR		 839 }
840
9e2d493e
WR		 841 skb_put(resp, dev->ops->rx_frame_size(resp->data));
842 skb_pull(resp, dev->ops->rx_header_len);
843 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 844
4231604b 845 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 846
2c206fb7 847done:
4231604b 848 kfree(cmd);
2c206fb7 849 dev->cmd = NULL;
aada17ac
WR		 850 return rc;
851}
852
853static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
854 struct sk_buff *req, struct sk_buff *resp,
855 int resp_len,
856 pn533_send_async_complete_t complete_cb,
857 void *complete_cb_context)
858{
859 struct pn533_cmd *cmd;
aada17ac
WR		 860 int rc = 0;
861
fcfafc76 862 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 863
4231604b
WR		 864 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
865 if (!cmd)
aada17ac
WR		 866 return -ENOMEM;
867
4b2a9532 868 cmd->code = cmd_code;
4231604b
WR		 869 cmd->req = req;
870 cmd->resp = resp;
871 cmd->resp_len = resp_len;
872 cmd->complete_cb = complete_cb;
873 cmd->complete_cb_context = complete_cb_context;
aada17ac 874
9e2d493e 875 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 876
877 mutex_lock(&dev->cmd_lock);
878
879 if (!dev->cmd_pending) {
ddf19d20 880 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 881 if (rc)
882 goto error;
883
884 dev->cmd_pending = 1;
2c206fb7 885 dev->cmd = cmd;
aada17ac
WR		 886 goto unlock;
887 }
888
fcfafc76
WR		 889 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
890 cmd_code);
aada17ac 891
aada17ac 892 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 893 list_add_tail(&cmd->queue, &dev->cmd_queue);
894
895 goto unlock;
896
897error:
4231604b 898 kfree(cmd);
aada17ac
WR		 899unlock:
900 mutex_unlock(&dev->cmd_lock);
901 return rc;
15461aeb
WR		 902}
903
904static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
905 struct sk_buff *req,
906 pn533_send_async_complete_t complete_cb,
907 void *complete_cb_context)
908{
909 struct sk_buff *resp;
910 int rc;
9e2d493e
WR		 911 int resp_len = dev->ops->rx_header_len +
912 dev->ops->max_payload_len +
913 dev->ops->rx_tail_len;
15461aeb 914
15461aeb
WR		 915 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
916 if (!resp)
917 return -ENOMEM;
918
919 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
920 complete_cb_context);
921 if (rc)
922 dev_kfree_skb(resp);
923
924 return rc;
aada17ac
WR		 925}
926
927static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
928 struct sk_buff *req,
929 pn533_send_async_complete_t complete_cb,
930 void *complete_cb_context)
931{
932 struct sk_buff *resp;
933 int rc;
9e2d493e
WR		 934 int resp_len = dev->ops->rx_header_len +
935 dev->ops->max_payload_len +
936 dev->ops->rx_tail_len;
aada17ac 937
9e2d493e 938 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 939 if (!resp)
940 return -ENOMEM;
941
9e2d493e
WR		 942 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
943 complete_cb_context);
aada17ac
WR		 944 if (rc)
945 dev_kfree_skb(resp);
946
947 return rc;
948}
949
b1e666f5
WR		 950/*
951 * pn533_send_cmd_direct_async
952 *
953 * The function sends a piority cmd directly to the chip omiting the cmd
954 * queue. It's intended to be used by chaining mechanism of received responses
955 * where the host has to request every single chunk of data before scheduling
956 * next cmd from the queue.
957 */
958static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
959 struct sk_buff *req,
960 pn533_send_async_complete_t complete_cb,
961 void *complete_cb_context)
962{
b1e666f5 963 struct sk_buff *resp;
4231604b 964 struct pn533_cmd *cmd;
b1e666f5 965 int rc;
9e2d493e
WR		 966 int resp_len = dev->ops->rx_header_len +
967 dev->ops->max_payload_len +
968 dev->ops->rx_tail_len;
b1e666f5 969
b1e666f5
WR		 970 resp = alloc_skb(resp_len, GFP_KERNEL);
971 if (!resp)
972 return -ENOMEM;
973
4231604b
WR		 974 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
975 if (!cmd) {
b1e666f5
WR		 976 dev_kfree_skb(resp);
977 return -ENOMEM;
978 }
979
4b2a9532 980 cmd->code = cmd_code;
4231604b
WR		 981 cmd->req = req;
982 cmd->resp = resp;
983 cmd->resp_len = resp_len;
984 cmd->complete_cb = complete_cb;
985 cmd->complete_cb_context = complete_cb_context;
b1e666f5 986
9e2d493e 987 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 988
ddf19d20 989 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 990 if (rc < 0) {
991 dev_kfree_skb(resp);
4231604b 992 kfree(cmd);
2c206fb7
WR		 993 } else {
994 dev->cmd = cmd;
b1e666f5
WR		 995 }
996
997 return rc;
998}
999
c79490e1
WR		 1000static void pn533_wq_cmd_complete(struct work_struct *work)
1001{
1002 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1003 int rc;
1004
1005 rc = pn533_send_async_complete(dev);
1006 if (rc != -EINPROGRESS)
1007 queue_work(dev->wq, &dev->cmd_work);
1008}
1009
5d50b364
SO		 1010static void pn533_wq_cmd(struct work_struct *work)
1011{
1012 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1013 struct pn533_cmd *cmd;
0ce1fbdd 1014 int rc;
5d50b364
SO		 1015
1016 mutex_lock(&dev->cmd_lock);
1017
1018 if (list_empty(&dev->cmd_queue)) {
1019 dev->cmd_pending = 0;
1020 mutex_unlock(&dev->cmd_lock);
1021 return;
1022 }
1023
1024 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1025
60ad07ab
SJ		 1026 list_del(&cmd->queue);
1027
5d50b364
SO		 1028 mutex_unlock(&dev->cmd_lock);
1029
ddf19d20 1030 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 1031 if (rc < 0) {
1032 dev_kfree_skb(cmd->req);
1033 dev_kfree_skb(cmd->resp);
4231604b 1034 kfree(cmd);
2c206fb7 1035 return;
0ce1fbdd 1036 }
2c206fb7
WR		 1037
1038 dev->cmd = cmd;
5d50b364
SO		 1039}
1040
c46ee386 1041struct pn533_sync_cmd_response {
94c5c156 1042 struct sk_buff *resp;
c46ee386
AAJ		 1043 struct completion done;
1044};
1045
94c5c156
WR		 1046static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1047 struct sk_buff *resp)
1048{
1049 struct pn533_sync_cmd_response *arg = _arg;
1050
94c5c156
WR		 1051 arg->resp = resp;
1052 complete(&arg->done);
1053
1054 return 0;
1055}
1056
1057/* pn533_send_cmd_sync
1058 *
1059 * Please note the req parameter is freed inside the function to
1060 * limit a number of return value interpretations by the caller.
1061 *
1062 * 1. negative in case of error during TX path -> req should be freed
1063 *
1064 * 2. negative in case of error during RX path -> req should not be freed
1065 * as it's been already freed at the begining of RX path by
1066 * async_complete_cb.
1067 *
1068 * 3. valid pointer in case of succesfult RX path
1069 *
1070 * A caller has to check a return value with IS_ERR macro. If the test pass,
1071 * the returned pointer is valid.
1072 *
1073 * */
1074static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1075 struct sk_buff *req)
1076{
1077 int rc;
1078 struct pn533_sync_cmd_response arg;
1079
94c5c156
WR		 1080 init_completion(&arg.done);
1081
1082 rc = pn533_send_cmd_async(dev, cmd_code, req,
1083 pn533_send_sync_complete, &arg);
1084 if (rc) {
1085 dev_kfree_skb(req);
1086 return ERR_PTR(rc);
1087 }
1088
1089 wait_for_completion(&arg.done);
1090
1091 return arg.resp;
1092}
1093
c46ee386
AAJ		 1094static void pn533_send_complete(struct urb *urb)
1095{
1096 struct pn533 *dev = urb->context;
1097
c46ee386
AAJ		 1098 switch (urb->status) {
1099 case 0:
f8f99171 1100 break; /* success */
c46ee386
AAJ		 1101 case -ECONNRESET:
1102 case -ENOENT:
6ca55372 1103 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 1104 "The urb has been stopped (status %d)",
1105 urb->status);
c46ee386 1106 break;
f8f99171 1107 case -ESHUTDOWN:
c46ee386 1108 default:
f8f99171
WR		 1109 nfc_dev_err(&dev->interface->dev,
1110 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 1111 }
1112}
1113
10cff29a
WR		 1114static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1115{
1116 /* ACR122U does not support any command which aborts last
1117 * issued command i.e. as ACK for standard PN533. Additionally,
1118 * it behaves stange, sending broken or incorrect responses,
1119 * when we cancel urb before the chip will send response.
1120 */
1121 if (dev->device_type == PN533_DEVICE_ACR122U)
1122 return;
1123
1124 /* An ack will cancel the last issued command */
1125 pn533_send_ack(dev, flags);
1126
1127 /* cancel the urb request */
1128 usb_kill_urb(dev->in_urb);
1129}
1130
9e2d493e 1131static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 1132{
1133 struct sk_buff *skb;
1134
9e2d493e 1135 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 1136 size +
9e2d493e 1137 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 1138
1139 if (skb)
9e2d493e 1140 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 1141
1142 return skb;
1143}
1144
c46ee386
AAJ		 1145struct pn533_target_type_a {
1146 __be16 sens_res;
1147 u8 sel_res;
1148 u8 nfcid_len;
1149 u8 nfcid_data[];
1150} __packed;
1151
1152
1153#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1154#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1155#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1156
1157#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1158#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1159
1160#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1161#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1162
1163#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1164#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1165#define PN533_TYPE_A_SEL_PROT_DEP 2
1166#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1167
1168static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1169 int target_data_len)
1170{
1171 u8 ssd;
1172 u8 platconf;
1173
1174 if (target_data_len < sizeof(struct pn533_target_type_a))
1175 return false;
1176
1177 /* The lenght check of nfcid[] and ats[] are not being performed because
1178 the values are not being used */
1179
1180 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1181 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1182 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1183
1184 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1185 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1186 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1187 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1188 return false;
1189
1190 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1191 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1192 return false;
1193
1194 return true;
1195}
1196
1197static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1198 int tgt_data_len)
1199{
1200 struct pn533_target_type_a *tgt_type_a;
1201
37cf4fc6 1202 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1203
1204 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1205 return -EPROTO;
1206
1207 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1208 case PN533_TYPE_A_SEL_PROT_MIFARE:
1209 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1210 break;
1211 case PN533_TYPE_A_SEL_PROT_ISO14443:
1212 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1213 break;
1214 case PN533_TYPE_A_SEL_PROT_DEP:
1215 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1216 break;
1217 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1218 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1219 NFC_PROTO_NFC_DEP_MASK;
1220 break;
1221 }
1222
1223 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1224 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1225 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1226 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1227
1228 return 0;
1229}
1230
1231struct pn533_target_felica {
1232 u8 pol_res;
1233 u8 opcode;
1234 u8 nfcid2[8];
1235 u8 pad[8];
1236 /* optional */
1237 u8 syst_code[];
1238} __packed;
1239
1240#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1241#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1242
1243static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1244 int target_data_len)
1245{
1246 if (target_data_len < sizeof(struct pn533_target_felica))
1247 return false;
1248
1249 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1250 return false;
1251
1252 return true;
1253}
1254
1255static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1256 int tgt_data_len)
1257{
1258 struct pn533_target_felica *tgt_felica;
1259
37cf4fc6 1260 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1261
1262 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1263 return -EPROTO;
1264
5d467742
WR		 1265 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1266 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1267 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1268 else
1269 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1270
7975754f
SO		 1271 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1272 nfc_tgt->sensf_res_len = 9;
1273
c46ee386
AAJ		 1274 return 0;
1275}
1276
1277struct pn533_target_jewel {
1278 __be16 sens_res;
1279 u8 jewelid[4];
1280} __packed;
1281
1282static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1283 int target_data_len)
1284{
1285 u8 ssd;
1286 u8 platconf;
1287
1288 if (target_data_len < sizeof(struct pn533_target_jewel))
1289 return false;
1290
1291 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1292 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1293 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1294
1295 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1296 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1297 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1298 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1299 return false;
1300
1301 return true;
1302}
1303
1304static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1305 int tgt_data_len)
1306{
1307 struct pn533_target_jewel *tgt_jewel;
1308
37cf4fc6 1309 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1310
1311 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1312 return -EPROTO;
1313
1314 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1315 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1316 nfc_tgt->nfcid1_len = 4;
1317 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1318
1319 return 0;
1320}
1321
1322struct pn533_type_b_prot_info {
1323 u8 bitrate;
1324 u8 fsci_type;
1325 u8 fwi_adc_fo;
1326} __packed;
1327
1328#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1329#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1330#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1331
1332struct pn533_type_b_sens_res {
1333 u8 opcode;
1334 u8 nfcid[4];
1335 u8 appdata[4];
1336 struct pn533_type_b_prot_info prot_info;
1337} __packed;
1338
1339#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1340
1341struct pn533_target_type_b {
1342 struct pn533_type_b_sens_res sensb_res;
1343 u8 attrib_res_len;
1344 u8 attrib_res[];
1345} __packed;
1346
1347static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1348 int target_data_len)
1349{
1350 if (target_data_len < sizeof(struct pn533_target_type_b))
1351 return false;
1352
1353 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1354 return false;
1355
1356 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1357 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1358 return false;
1359
1360 return true;
1361}
1362
1363static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1364 int tgt_data_len)
1365{
1366 struct pn533_target_type_b *tgt_type_b;
1367
37cf4fc6 1368 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1369
1370 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1371 return -EPROTO;
1372
01d719a2 1373 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1374
1375 return 0;
1376}
1377
b5193e5d
WR		 1378static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1379 int tgdata_len)
c46ee386 1380{
c46ee386
AAJ		 1381 struct nfc_target nfc_tgt;
1382 int rc;
1383
1384 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1385 dev->poll_mod_curr);
c46ee386 1386
b5193e5d 1387 if (tg != 1)
c46ee386
AAJ		 1388 return -EPROTO;
1389
98b3ac1b
SO		 1390 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1391
c46ee386
AAJ		 1392 switch (dev->poll_mod_curr) {
1393 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1394 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1395 break;
1396 case PN533_POLL_MOD_212KBPS_FELICA:
1397 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1398 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1399 break;
1400 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1401 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1402 break;
1403 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1404 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1405 break;
1406 default:
b5193e5d
WR		 1407 nfc_dev_err(&dev->interface->dev,
1408 "Unknown current poll modulation");
c46ee386
AAJ		 1409 return -EPROTO;
1410 }
1411
1412 if (rc)
1413 return rc;
1414
1415 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1416 nfc_dev_dbg(&dev->interface->dev,
1417 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1418 return -EAGAIN;
1419 }
1420
b5193e5d
WR		 1421 nfc_dev_dbg(&dev->interface->dev,
1422 "Target found - supported protocols: 0x%x",
1423 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1424
1425 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1426
1427 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1428
1429 return 0;
1430}
1431
6fbbdc16
SO		 1432static inline void pn533_poll_next_mod(struct pn533 *dev)
1433{
1434 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1435}
1436
c46ee386
AAJ		 1437static void pn533_poll_reset_mod_list(struct pn533 *dev)
1438{
1439 dev->poll_mod_count = 0;
1440}
1441
1442static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1443{
1444 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1445 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1446 dev->poll_mod_count++;
1447}
1448
6fbbdc16
SO		 1449static void pn533_poll_create_mod_list(struct pn533 *dev,
1450 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1451{
1452 pn533_poll_reset_mod_list(dev);
1453
b08e8603
WR		 1454 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1455 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1456 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1457 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1458
b08e8603
WR		 1459 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1460 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1461 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1462 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1463 }
1464
6fbbdc16 1465 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1466 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1467
01d719a2 1468 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1469 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1470
6fbbdc16
SO		 1471 if (tm_protocols)
1472 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1473}
1474
b5193e5d 1475static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1476{
b5193e5d
WR		 1477 u8 nbtg, tg, *tgdata;
1478 int rc, tgdata_len;
c46ee386
AAJ		 1479
1480 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1481
b5193e5d
WR		 1482 nbtg = resp->data[0];
1483 tg = resp->data[1];
1484 tgdata = &resp->data[2];
1485 tgdata_len = resp->len - 2; /* nbtg + tg */
1486
1487 if (nbtg) {
1488 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1489
1490 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1491 if (rc == 0) {
1492 pn533_poll_reset_mod_list(dev);
1493 return 0;
1494 }
c46ee386
AAJ		 1495 }
1496
6fbbdc16 1497 return -EAGAIN;
c46ee386
AAJ		 1498}
1499
9e2d493e 1500static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1501{
b5193e5d
WR		 1502 struct sk_buff *skb;
1503 u8 *felica, *nfcid3, *gb;
1504
9e2d493e
WR		 1505 u8 *gbytes = dev->gb;
1506 size_t gbytes_len = dev->gb_len;
1507
51d9e803
SO		 1508 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1509 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1510 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1511 0xff, 0xff}; /* System code */
b5193e5d 1512
51d9e803
SO		 1513 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1514 0x0, 0x0, 0x0,
1515 0x40}; /* SEL_RES for DEP */
ad3823ce 1516
b5193e5d
WR		 1517 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1518 felica (18), nfcid3 (10), gb_len (1) */
1519 gbytes_len +
1520 1; /* len Tk*/
ad3823ce 1521
9e2d493e 1522 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1523 if (!skb)
1524 return NULL;
ad3823ce
SO		 1525
1526 /* DEP support only */
52f2eaee 1527 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1528
1529 /* MIFARE params */
1530 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1531
1532 /* Felica params */
b5193e5d
WR		 1533 felica = skb_put(skb, 18);
1534 memcpy(felica, felica_params, 18);
1535 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1536
1537 /* NFCID3 */
b5193e5d
WR		 1538 nfcid3 = skb_put(skb, 10);
1539 memset(nfcid3, 0, 10);
1540 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1541
1542 /* General bytes */
b5193e5d 1543 *skb_put(skb, 1) = gbytes_len;
51d9e803 1544
b5193e5d
WR		 1545 gb = skb_put(skb, gbytes_len);
1546 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1547
b5193e5d
WR		 1548 /* Len Tk */
1549 *skb_put(skb, 1) = 0;
51d9e803 1550
b5193e5d 1551 return skb;
ad3823ce
SO		 1552}
1553
b1bb290a 1554#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1555#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1556static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1557 struct sk_buff *resp)
103b34cf 1558{
e4878823 1559 u8 status;
103b34cf
SO		 1560
1561 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1562
e4878823
WR		 1563 if (IS_ERR(resp))
1564 return PTR_ERR(resp);
103b34cf 1565
e4878823
WR		 1566 status = resp->data[0];
1567 skb_pull(resp, sizeof(status));
103b34cf 1568
e4878823 1569 if (status != 0) {
103b34cf 1570 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1571 dev->tgt_mode = 0;
e4878823 1572 dev_kfree_skb(resp);
103b34cf
SO		 1573 return 0;
1574 }
1575
e4878823 1576 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1577}
1578
1579static void pn533_wq_tg_get_data(struct work_struct *work)
1580{
1581 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1582
e4878823
WR		 1583 struct sk_buff *skb;
1584 int rc;
103b34cf 1585
e4878823 1586 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1587
9e2d493e 1588 skb = pn533_alloc_skb(dev, 0);
e4878823 1589 if (!skb)
103b34cf
SO		 1590 return;
1591
e4878823
WR		 1592 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1593 pn533_tm_get_data_complete, NULL);
103b34cf 1594
e4878823
WR		 1595 if (rc < 0)
1596 dev_kfree_skb(skb);
103b34cf
SO		 1597
1598 return;
1599}
1600
fc40a8c1 1601#define ATR_REQ_GB_OFFSET 17
b5193e5d 1602static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1603{
b5193e5d 1604 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1605 size_t gb_len;
103b34cf 1606 int rc;
ad3823ce
SO		 1607
1608 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1609
b5193e5d 1610 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1611 return -EINVAL;
1612
b5193e5d
WR		 1613 mode = resp->data[0];
1614 cmd = &resp->data[1];
ad3823ce 1615
b5193e5d
WR		 1616 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1617 mode, resp->len);
ad3823ce 1618
b5193e5d
WR		 1619 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1620 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1621 comm_mode = NFC_COMM_ACTIVE;
1622
b5193e5d 1623 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1624 return -EOPNOTSUPP;
1625
b5193e5d
WR		 1626 gb = cmd + ATR_REQ_GB_OFFSET;
1627 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1628
103b34cf
SO		 1629 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1630 comm_mode, gb, gb_len);
1631 if (rc < 0) {
1632 nfc_dev_err(&dev->interface->dev,
1633 "Error when signaling target activation");
1634 return rc;
1635 }
1636
51ad304c 1637 dev->tgt_mode = 1;
103b34cf
SO		 1638 queue_work(dev->wq, &dev->tg_work);
1639
1640 return 0;
fe7c5800
SO		 1641}
1642
6fbbdc16 1643static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1644{
37cf4fc6 1645 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1646
1647 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1648
6fbbdc16
SO		 1649 dev->cancel_listen = 1;
1650
6fbbdc16
SO		 1651 pn533_poll_next_mod(dev);
1652
1653 queue_work(dev->wq, &dev->poll_work);
1654}
1655
1656static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1657 struct sk_buff *resp)
6fbbdc16
SO		 1658{
1659 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1660 int rc;
1661
6fbbdc16 1662 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1663
b5193e5d
WR		 1664 if (IS_ERR(resp)) {
1665 rc = PTR_ERR(resp);
1666
1667 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1668 __func__, rc);
1669
1670 if (rc == -ENOENT) {
1671 if (dev->poll_mod_count != 0)
1672 return rc;
1673 else
1674 goto stop_poll;
1675 } else if (rc < 0) {
1676 nfc_dev_err(&dev->interface->dev,
1677 "Error %d when running poll", rc);
1678 goto stop_poll;
1679 }
6fbbdc16 1680 }
ad3823ce 1681
6fbbdc16
SO		 1682 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1683
b5193e5d 1684 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1685 del_timer(&dev->listen_timer);
b5193e5d
WR		 1686 rc = pn533_init_target_complete(dev, resp);
1687 goto done;
6fbbdc16
SO		 1688 }
1689
b5193e5d
WR		 1690 /* Initiator mode */
1691 rc = pn533_start_poll_complete(dev, resp);
1692 if (!rc)
1693 goto done;
6fbbdc16 1694
95cb9e10
WR		 1695 if (!dev->poll_mod_count) {
1696 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1697 goto done;
1698 }
1699
b5193e5d 1700 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1701 queue_work(dev->wq, &dev->poll_work);
1702
b5193e5d
WR		 1703done:
1704 dev_kfree_skb(resp);
1705 return rc;
6fbbdc16
SO		 1706
1707stop_poll:
b5193e5d
WR		 1708 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1709
6fbbdc16
SO		 1710 pn533_poll_reset_mod_list(dev);
1711 dev->poll_protocols = 0;
b5193e5d 1712 return rc;
ad3823ce
SO		 1713}
1714
9e2d493e
WR		 1715static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1716 struct pn533_poll_modulations *mod)
c46ee386 1717{
b5193e5d 1718 struct sk_buff *skb;
c46ee386 1719
9e2d493e 1720 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1721 if (!skb)
1722 return NULL;
c46ee386 1723
b5193e5d 1724 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1725
b5193e5d 1726 return skb;
6fbbdc16 1727}
c46ee386 1728
6fbbdc16
SO		 1729static int pn533_send_poll_frame(struct pn533 *dev)
1730{
b5193e5d
WR		 1731 struct pn533_poll_modulations *mod;
1732 struct sk_buff *skb;
6fbbdc16 1733 int rc;
b5193e5d 1734 u8 cmd_code;
c46ee386 1735
b5193e5d 1736 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1737
b5193e5d
WR		 1738 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1739 __func__, mod->len);
c46ee386 1740
b5193e5d
WR		 1741 if (mod->len == 0) { /* Listen mode */
1742 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1743 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1744 } else { /* Polling mode */
1745 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1746 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1747 }
1748
1749 if (!skb) {
1750 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1751 return -ENOMEM;
1752 }
1753
1754 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1755 NULL);
1756 if (rc < 0) {
1757 dev_kfree_skb(skb);
6fbbdc16 1758 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1759 }
c46ee386 1760
6fbbdc16
SO		 1761 return rc;
1762}
1763
1764static void pn533_wq_poll(struct work_struct *work)
1765{
1766 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1767 struct pn533_poll_modulations *cur_mod;
1768 int rc;
1769
1770 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1771
1772 nfc_dev_dbg(&dev->interface->dev,
1773 "%s cancel_listen %d modulation len %d",
1774 __func__, dev->cancel_listen, cur_mod->len);
1775
1776 if (dev->cancel_listen == 1) {
1777 dev->cancel_listen = 0;
10cff29a 1778 pn533_abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1779 }
1780
6fbbdc16
SO		 1781 rc = pn533_send_poll_frame(dev);
1782 if (rc)
1783 return;
c46ee386 1784
6fbbdc16
SO		 1785 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1786 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1787
6fbbdc16 1788 return;
c46ee386
AAJ		 1789}
1790
fe7c5800
SO		 1791static int pn533_start_poll(struct nfc_dev *nfc_dev,
1792 u32 im_protocols, u32 tm_protocols)
1793{
1794 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1795
1796 nfc_dev_dbg(&dev->interface->dev,
1797 "%s: im protocols 0x%x tm protocols 0x%x",
1798 __func__, im_protocols, tm_protocols);
1799
1800 if (dev->tgt_active_prot) {
1801 nfc_dev_err(&dev->interface->dev,
1802 "Cannot poll with a target already activated");
1803 return -EBUSY;
1804 }
1805
51ad304c
SO		 1806 if (dev->tgt_mode) {
1807 nfc_dev_err(&dev->interface->dev,
1808 "Cannot poll while already being activated");
1809 return -EBUSY;
1810 }
1811
6fbbdc16
SO		 1812 if (tm_protocols) {
1813 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1814 if (dev->gb == NULL)
1815 tm_protocols = 0;
1816 }
ad3823ce 1817
6fbbdc16
SO		 1818 dev->poll_mod_curr = 0;
1819 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1820 dev->poll_protocols = im_protocols;
1821 dev->listen_protocols = tm_protocols;
ad3823ce 1822
6fbbdc16 1823 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1824}
1825
c46ee386
AAJ		 1826static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1827{
1828 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1829
1830 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1831
6fbbdc16
SO		 1832 del_timer(&dev->listen_timer);
1833
c46ee386 1834 if (!dev->poll_mod_count) {
6ca55372
WR		 1835 nfc_dev_dbg(&dev->interface->dev,
1836 "Polling operation was not running");
c46ee386
AAJ		 1837 return;
1838 }
1839
10cff29a 1840 pn533_abort_cmd(dev, GFP_KERNEL);
7c2a04a9 1841 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1842}
1843
1844static int pn533_activate_target_nfcdep(struct pn533 *dev)
1845{
cb950d93 1846 struct pn533_cmd_activate_response *rsp;
541d920b 1847 u16 gt_len;
c46ee386
AAJ		 1848 int rc;
1849
cb950d93
WR		 1850 struct sk_buff *skb;
1851 struct sk_buff *resp;
c46ee386 1852
cb950d93 1853 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1854
9e2d493e 1855 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1856 if (!skb)
1857 return -ENOMEM;
c46ee386 1858
cb950d93
WR		 1859 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1860 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1861
cb950d93
WR		 1862 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1863 if (IS_ERR(resp))
1864 return PTR_ERR(resp);
c46ee386 1865
37cf4fc6 1866 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1867 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1868 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1869 nfc_dev_err(&dev->interface->dev,
1870 "Target activation failed (error 0x%x)", rc);
cb950d93 1871 dev_kfree_skb(resp);
c46ee386 1872 return -EIO;
8a0ecfe7 1873 }
c46ee386 1874
541d920b 1875 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1876 gt_len = resp->len - 16;
1877 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1878
cb950d93 1879 dev_kfree_skb(resp);
541d920b 1880 return rc;
c46ee386
AAJ		 1881}
1882
90099433
EL		 1883static int pn533_activate_target(struct nfc_dev *nfc_dev,
1884 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1885{
1886 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1887 int rc;
1888
1889 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1890 protocol);
c46ee386
AAJ		 1891
1892 if (dev->poll_mod_count) {
6ca55372
WR		 1893 nfc_dev_err(&dev->interface->dev,
1894 "Cannot activate while polling");
c46ee386
AAJ		 1895 return -EBUSY;
1896 }
1897
1898 if (dev->tgt_active_prot) {
6ca55372
WR		 1899 nfc_dev_err(&dev->interface->dev,
1900 "There is already an active target");
c46ee386
AAJ		 1901 return -EBUSY;
1902 }
1903
1904 if (!dev->tgt_available_prots) {
6ca55372
WR		 1905 nfc_dev_err(&dev->interface->dev,
1906 "There is no available target to activate");
c46ee386
AAJ		 1907 return -EINVAL;
1908 }
1909
1910 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1911 nfc_dev_err(&dev->interface->dev,
1912 "Target doesn't support requested proto %u",
1913 protocol);
c46ee386
AAJ		 1914 return -EINVAL;
1915 }
1916
1917 if (protocol == NFC_PROTO_NFC_DEP) {
1918 rc = pn533_activate_target_nfcdep(dev);
1919 if (rc) {
6ca55372
WR		 1920 nfc_dev_err(&dev->interface->dev,
1921 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1922 return rc;
1923 }
1924 }
1925
1926 dev->tgt_active_prot = protocol;
1927 dev->tgt_available_prots = 0;
1928
1929 return 0;
1930}
1931
90099433
EL		 1932static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1933 struct nfc_target *target)
c46ee386
AAJ		 1934{
1935 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1936
1937 struct sk_buff *skb;
1938 struct sk_buff *resp;
1939
c46ee386
AAJ		 1940 int rc;
1941
1942 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1943
1944 if (!dev->tgt_active_prot) {
1945 nfc_dev_err(&dev->interface->dev, "There is no active target");
1946 return;
1947 }
1948
1949 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1950 skb_queue_purge(&dev->resp_q);
1951
9e2d493e 1952 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1953 if (!skb)
1954 return;
c46ee386 1955
cb950d93 1956 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1957
cb950d93
WR		 1958 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1959 if (IS_ERR(resp))
c46ee386 1960 return;
c46ee386 1961
cb950d93 1962 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1963 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1964 nfc_dev_err(&dev->interface->dev,
1965 "Error 0x%x when releasing the target", rc);
c46ee386 1966
cb950d93 1967 dev_kfree_skb(resp);
c46ee386
AAJ		 1968 return;
1969}
1970
361f3cb7
SO		 1971
1972static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1973 struct sk_buff *resp)
361f3cb7 1974{
13003649 1975 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1976 u8 target_gt_len;
1977 int rc;
13003649 1978 u8 active = *(u8 *)arg;
70418e6e
WR		 1979
1980 kfree(arg);
361f3cb7 1981
13003649
WR		 1982 if (IS_ERR(resp))
1983 return PTR_ERR(resp);
361f3cb7
SO		 1984
1985 if (dev->tgt_available_prots &&
1986 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1987 nfc_dev_err(&dev->interface->dev,
5d467742 1988 "The target does not support DEP");
13003649
WR		 1989 rc = -EINVAL;
1990 goto error;
361f3cb7
SO		 1991 }
1992
13003649
WR		 1993 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1994
1995 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1996 if (rc != PN533_CMD_RET_SUCCESS) {
1997 nfc_dev_err(&dev->interface->dev,
a45e1c8d 1998 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 1999 goto error;
361f3cb7
SO		 2000 }
2001
2002 if (!dev->tgt_available_prots) {
13003649
WR		 2003 struct nfc_target nfc_target;
2004
361f3cb7
SO		 2005 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2006
2007 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 2008 nfc_target.nfcid1_len = 10;
13003649 2009 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 2010 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2011 if (rc)
13003649 2012 goto error;
361f3cb7
SO		 2013
2014 dev->tgt_available_prots = 0;
2015 }
2016
2017 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2018
2019 /* ATR_RES general bytes are located at offset 17 */
13003649 2020 target_gt_len = resp->len - 17;
361f3cb7 2021 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 2022 rsp->gt, target_gt_len);
361f3cb7
SO		 2023 if (rc == 0)
2024 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 2025 dev->nfc_dev->targets[0].idx,
2026 !active, NFC_RF_INITIATOR);
361f3cb7 2027
13003649
WR		 2028error:
2029 dev_kfree_skb(resp);
2030 return rc;
361f3cb7
SO		 2031}
2032
41a8ec49
SO		 2033static int pn533_mod_to_baud(struct pn533 *dev)
2034{
2035 switch (dev->poll_mod_curr) {
2036 case PN533_POLL_MOD_106KBPS_A:
2037 return 0;
2038 case PN533_POLL_MOD_212KBPS_FELICA:
2039 return 1;
2040 case PN533_POLL_MOD_424KBPS_FELICA:
2041 return 2;
2042 default:
2043 return -EINVAL;
2044 }
2045}
2046
d7f3345d 2047#define PASSIVE_DATA_LEN 5
90099433 2048static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 2049 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 2050{
2051 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 2052 struct sk_buff *skb;
2053 int rc, baud, skb_len;
2054 u8 *next, *arg;
2055
d7f3345d 2056 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 2057
2058 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2059
361f3cb7
SO		 2060 if (dev->poll_mod_count) {
2061 nfc_dev_err(&dev->interface->dev,
5d467742 2062 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 2063 return -EBUSY;
2064 }
2065
2066 if (dev->tgt_active_prot) {
2067 nfc_dev_err(&dev->interface->dev,
5d467742 2068 "There is already an active target");
361f3cb7
SO		 2069 return -EBUSY;
2070 }
2071
41a8ec49
SO		 2072 baud = pn533_mod_to_baud(dev);
2073 if (baud < 0) {
2074 nfc_dev_err(&dev->interface->dev,
2075 "Invalid curr modulation %d", dev->poll_mod_curr);
2076 return baud;
2077 }
2078
13003649 2079 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 2080 if (comm_mode == NFC_COMM_PASSIVE)
13003649 2081 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2082
9e2d493e 2083 skb = pn533_alloc_skb(dev, skb_len);
13003649 2084 if (!skb)
361f3cb7
SO		 2085 return -ENOMEM;
2086
13003649
WR		 2087 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2088 *skb_put(skb, 1) = baud; /* Baud rate */
2089
2090 next = skb_put(skb, 1); /* Next */
2091 *next = 0;
361f3cb7 2092
13003649
WR		 2093 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2094 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2095 PASSIVE_DATA_LEN);
2096 *next |= 1;
d7f3345d
SO		 2097 }
2098
47807d3d 2099 if (gb != NULL && gb_len > 0) {
13003649
WR		 2100 memcpy(skb_put(skb, gb_len), gb, gb_len);
2101 *next |= 4; /* We have some Gi */
361f3cb7 2102 } else {
13003649 2103 *next = 0;
361f3cb7
SO		 2104 }
2105
13003649
WR		 2106 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2107 if (!arg) {
2108 dev_kfree_skb(skb);
2109 return -ENOMEM;
2110 }
361f3cb7 2111
13003649 2112 *arg = !comm_mode;
361f3cb7 2113
13003649
WR		 2114 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2115 pn533_in_dep_link_up_complete, arg);
2116
2117 if (rc < 0) {
2118 dev_kfree_skb(skb);
2119 kfree(arg);
2120 }
361f3cb7
SO		 2121
2122 return rc;
2123}
2124
2125static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2126{
6fbbdc16
SO		 2127 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2128
fcfafc76
WR		 2129 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2130
6fbbdc16
SO		 2131 pn533_poll_reset_mod_list(dev);
2132
10cff29a
WR		 2133 if (dev->tgt_mode || dev->tgt_active_prot)
2134 pn533_abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 2135
2136 dev->tgt_active_prot = 0;
2137 dev->tgt_mode = 0;
2138
2139 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2140
2141 return 0;
2142}
2143
c46ee386 2144struct pn533_data_exchange_arg {
c46ee386
AAJ		 2145 data_exchange_cb_t cb;
2146 void *cb_context;
2147};
2148
6ff73fd2
SO		 2149static struct sk_buff *pn533_build_response(struct pn533 *dev)
2150{
2151 struct sk_buff *skb, *tmp, *t;
2152 unsigned int skb_len = 0, tmp_len = 0;
2153
fcfafc76 2154 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2155
2156 if (skb_queue_empty(&dev->resp_q))
2157 return NULL;
2158
2159 if (skb_queue_len(&dev->resp_q) == 1) {
2160 skb = skb_dequeue(&dev->resp_q);
2161 goto out;
2162 }
2163
2164 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2165 skb_len += tmp->len;
2166
2167 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2168 __func__, skb_len);
2169
2170 skb = alloc_skb(skb_len, GFP_KERNEL);
2171 if (skb == NULL)
2172 goto out;
2173
2174 skb_put(skb, skb_len);
2175
2176 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2177 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2178 tmp_len += tmp->len;
2179 }
2180
2181out:
2182 skb_queue_purge(&dev->resp_q);
2183
2184 return skb;
2185}
2186
c46ee386 2187static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2188 struct sk_buff *resp)
c46ee386
AAJ		 2189{
2190 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2191 struct sk_buff *skb;
2192 int rc = 0;
2193 u8 status, ret, mi;
c46ee386
AAJ		 2194
2195 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2196
b1e666f5
WR		 2197 if (IS_ERR(resp)) {
2198 rc = PTR_ERR(resp);
2199 goto _error;
c46ee386
AAJ		 2200 }
2201
b1e666f5
WR		 2202 status = resp->data[0];
2203 ret = status & PN533_CMD_RET_MASK;
2204 mi = status & PN533_CMD_MI_MASK;
2205
2206 skb_pull(resp, sizeof(status));
c46ee386 2207
b1e666f5
WR		 2208 if (ret != PN533_CMD_RET_SUCCESS) {
2209 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2210 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2211 rc = -EIO;
c46ee386
AAJ		 2212 goto error;
2213 }
2214
b1e666f5 2215 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2216
b1e666f5
WR		 2217 if (mi) {
2218 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2219 queue_work(dev->wq, &dev->mi_work);
2220 return -EINPROGRESS;
c46ee386
AAJ		 2221 }
2222
6ff73fd2 2223 skb = pn533_build_response(dev);
b1e666f5 2224 if (!skb)
6ff73fd2 2225 goto error;
c46ee386 2226
6ff73fd2 2227 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2228 kfree(arg);
2229 return 0;
2230
2231error:
b1e666f5
WR		 2232 dev_kfree_skb(resp);
2233_error:
6ff73fd2 2234 skb_queue_purge(&dev->resp_q);
b1e666f5 2235 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2236 kfree(arg);
b1e666f5 2237 return rc;
c46ee386
AAJ		 2238}
2239
be9ae4ce
SO		 2240static int pn533_transceive(struct nfc_dev *nfc_dev,
2241 struct nfc_target *target, struct sk_buff *skb,
2242 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2243{
2244 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2245 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2246 int rc;
2247
2248 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2249
b1e666f5
WR		 2250 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2251 /* TODO: Implement support to multi-part data exchange */
2252 nfc_dev_err(&dev->interface->dev,
2253 "Data length greater than the max allowed: %d",
2254 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2255 rc = -ENOSYS;
2256 goto error;
2257 }
2258
c46ee386 2259 if (!dev->tgt_active_prot) {
6ca55372
WR		 2260 nfc_dev_err(&dev->interface->dev,
2261 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2262 rc = -EINVAL;
2263 goto error;
2264 }
2265
b1e666f5 2266 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2267 if (!arg) {
2268 rc = -ENOMEM;
b1e666f5 2269 goto error;
c46ee386
AAJ		 2270 }
2271
c46ee386
AAJ		 2272 arg->cb = cb;
2273 arg->cb_context = cb_context;
2274
b1e666f5
WR		 2275 switch (dev->device_type) {
2276 case PN533_DEVICE_PASORI:
2277 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2278 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2279 skb,
2280 pn533_data_exchange_complete,
2281 arg);
2282
2283 break;
2284 }
2285 default:
2286 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2287
2288 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2289 skb, pn533_data_exchange_complete,
2290 arg);
2291
2292 break;
c46ee386
AAJ		 2293 }
2294
b1e666f5
WR		 2295 if (rc < 0) /* rc from send_async */
2296 goto error;
2297
c46ee386
AAJ		 2298 return 0;
2299
c46ee386 2300error:
b1e666f5
WR		 2301 kfree(arg);
2302 dev_kfree_skb(skb);
c46ee386
AAJ		 2303 return rc;
2304}
2305
dadb06f2 2306static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2307 struct sk_buff *resp)
dadb06f2 2308{
e4878823 2309 u8 status;
5b412fd1 2310
dadb06f2
SO		 2311 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2312
e4878823
WR		 2313 if (IS_ERR(resp))
2314 return PTR_ERR(resp);
5b412fd1 2315
e4878823 2316 status = resp->data[0];
dadb06f2 2317
e4878823 2318 dev_kfree_skb(resp);
dadb06f2 2319
e4878823 2320 if (status != 0) {
dadb06f2
SO		 2321 nfc_tm_deactivated(dev->nfc_dev);
2322
51ad304c
SO		 2323 dev->tgt_mode = 0;
2324
dadb06f2
SO		 2325 return 0;
2326 }
2327
2328 queue_work(dev->wq, &dev->tg_work);
2329
2330 return 0;
2331}
2332
2333static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2334{
2335 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2336 int rc;
2337
2338 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2339
e4878823 2340 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2341 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2342 "Data length greater than the max allowed: %d",
2343 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2344 return -ENOSYS;
dadb06f2
SO		 2345 }
2346
e4878823
WR		 2347 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2348 pn533_tm_send_complete, NULL);
2349 if (rc < 0)
2350 dev_kfree_skb(skb);
dadb06f2
SO		 2351
2352 return rc;
2353}
2354
6ff73fd2
SO		 2355static void pn533_wq_mi_recv(struct work_struct *work)
2356{
2357 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2358
2359 struct sk_buff *skb;
6ff73fd2
SO		 2360 int rc;
2361
2362 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2363
9e2d493e 2364 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2365 if (!skb)
2366 goto error;
6ff73fd2 2367
b1e666f5
WR		 2368 switch (dev->device_type) {
2369 case PN533_DEVICE_PASORI:
2370 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2371 rc = pn533_send_cmd_direct_async(dev,
2372 PN533_CMD_IN_COMM_THRU,
2373 skb,
2374 pn533_data_exchange_complete,
2375 dev->cmd_complete_mi_arg);
6ff73fd2 2376
b1e666f5
WR		 2377 break;
2378 }
2379 default:
2380 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2381
b1e666f5
WR		 2382 rc = pn533_send_cmd_direct_async(dev,
2383 PN533_CMD_IN_DATA_EXCHANGE,
2384 skb,
2385 pn533_data_exchange_complete,
2386 dev->cmd_complete_mi_arg);
b1bb290a 2387
b1e666f5 2388 break;
6ff73fd2
SO		 2389 }
2390
b1e666f5 2391 if (rc == 0) /* success */
6ff73fd2
SO		 2392 return;
2393
b1e666f5
WR		 2394 nfc_dev_err(&dev->interface->dev,
2395 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2396
b1e666f5 2397 dev_kfree_skb(skb);
140ef7f6 2398 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2399
b1e666f5 2400error:
6ff73fd2 2401 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2402 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2403}
2404
c46ee386
AAJ		 2405static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2406 u8 cfgdata_len)
2407{
cb950d93
WR		 2408 struct sk_buff *skb;
2409 struct sk_buff *resp;
2410
2411 int skb_len;
c46ee386
AAJ		 2412
2413 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2414
cb950d93 2415 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2416
9e2d493e 2417 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2418 if (!skb)
2419 return -ENOMEM;
c46ee386 2420
cb950d93
WR		 2421 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2422 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2423
cb950d93
WR		 2424 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2425 if (IS_ERR(resp))
2426 return PTR_ERR(resp);
c46ee386 2427
cb950d93
WR		 2428 dev_kfree_skb(resp);
2429 return 0;
2430}
2431
2432static int pn533_get_firmware_version(struct pn533 *dev,
2433 struct pn533_fw_version *fv)
2434{
2435 struct sk_buff *skb;
2436 struct sk_buff *resp;
2437
9e2d493e 2438 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2439 if (!skb)
2440 return -ENOMEM;
2441
2442 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2443 if (IS_ERR(resp))
2444 return PTR_ERR(resp);
2445
2446 fv->ic = resp->data[0];
2447 fv->ver = resp->data[1];
2448 fv->rev = resp->data[2];
2449 fv->support = resp->data[3];
2450
2451 dev_kfree_skb(resp);
2452 return 0;
c46ee386
AAJ		 2453}
2454
f75c2913 2455static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2456{
cb950d93
WR		 2457 struct sk_buff *skb;
2458 struct sk_buff *resp;
5c7b0531
SO		 2459
2460 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2461
9e2d493e 2462 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2463 if (!skb)
2464 return -ENOMEM;
5c7b0531 2465
cb950d93 2466 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2467
cb950d93
WR		 2468 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2469 if (IS_ERR(resp))
2470 return PTR_ERR(resp);
5c7b0531 2471
cb950d93 2472 dev_kfree_skb(resp);
5c7b0531 2473
94c5c156 2474 return 0;
5c7b0531
SO		 2475}
2476
53cf4839
WR		 2477struct pn533_acr122_poweron_rdr_arg {
2478 int rc;
2479 struct completion done;
2480};
2481
2482static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2483{
2484 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2485
2486 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2487
2488 print_hex_dump(KERN_ERR, "ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2489 urb->transfer_buffer, urb->transfer_buffer_length,
2490 false);
2491
2492 arg->rc = urb->status;
2493 complete(&arg->done);
2494}
2495
2496static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2497{
2498 /* Power on th reader (CCID cmd) */
2499 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2500 0, 0, 0, 0, 0, 0, 3, 0, 0};
2501 u8 buf[255];
2502 int rc;
2503 void *cntx;
2504 struct pn533_acr122_poweron_rdr_arg arg;
2505
2506 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2507
2508 init_completion(&arg.done);
2509 cntx = dev->in_urb->context; /* backup context */
2510
2511 dev->in_urb->transfer_buffer = buf;
2512 dev->in_urb->transfer_buffer_length = 255;
2513 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2514 dev->in_urb->context = &arg;
2515
2516 dev->out_urb->transfer_buffer = cmd;
2517 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2518
2519 print_hex_dump(KERN_ERR, "ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2520 cmd, sizeof(cmd), false);
2521
2522 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2523 if (rc) {
2524 nfc_dev_err(&dev->interface->dev,
2525 "Reader power on cmd error %d", rc);
2526 return rc;
2527 }
2528
2529 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2530 if (rc) {
2531 nfc_dev_err(&dev->interface->dev,
2532 "Can't submit for reader power on cmd response %d",
2533 rc);
2534 return rc;
2535 }
2536
2537 wait_for_completion(&arg.done);
2538 dev->in_urb->context = cntx; /* restore context */
2539
2540 return arg.rc;
2541}
2542
5c7b0531 2543static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2544 .dev_up = NULL,
2545 .dev_down = NULL,
361f3cb7
SO		 2546 .dep_link_up = pn533_dep_link_up,
2547 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2548 .start_poll = pn533_start_poll,
2549 .stop_poll = pn533_stop_poll,
2550 .activate_target = pn533_activate_target,
2551 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2552 .im_transceive = pn533_transceive,
dadb06f2 2553 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2554};
2555
5c7b0531
SO		 2556static int pn533_setup(struct pn533 *dev)
2557{
2558 struct pn533_config_max_retries max_retries;
2559 struct pn533_config_timing timing;
2560 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2561 int rc;
2562
2563 switch (dev->device_type) {
2564 case PN533_DEVICE_STD:
2565 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2566 max_retries.mx_rty_psl = 2;
2567 max_retries.mx_rty_passive_act =
2568 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2569
2570 timing.rfu = PN533_CONFIG_TIMING_102;
2571 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2572 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2573
2574 break;
2575
2576 case PN533_DEVICE_PASORI:
53cf4839 2577 case PN533_DEVICE_ACR122U:
5c7b0531
SO		 2578 max_retries.mx_rty_atr = 0x2;
2579 max_retries.mx_rty_psl = 0x1;
2580 max_retries.mx_rty_passive_act =
2581 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2582
2583 timing.rfu = PN533_CONFIG_TIMING_102;
2584 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2585 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2586
2587 break;
2588
2589 default:
2590 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2591 dev->device_type);
2592 return -EINVAL;
2593 }
2594
2595 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2596 (u8 *)&max_retries, sizeof(max_retries));
2597 if (rc) {
2598 nfc_dev_err(&dev->interface->dev,
2599 "Error on setting MAX_RETRIES config");
2600 return rc;
2601 }
2602
2603
2604 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2605 (u8 *)&timing, sizeof(timing));
2606 if (rc) {
2607 nfc_dev_err(&dev->interface->dev,
2608 "Error on setting RF timings");
2609 return rc;
2610 }
2611
2612 switch (dev->device_type) {
2613 case PN533_DEVICE_STD:
2614 break;
2615
2616 case PN533_DEVICE_PASORI:
f75c2913 2617 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2618
2619 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2620 pasori_cfg, 3);
2621 if (rc) {
2622 nfc_dev_err(&dev->interface->dev,
2623 "Error while settings PASORI config");
2624 return rc;
2625 }
2626
f75c2913 2627 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2628
2629 break;
2630 }
2631
2632 return 0;
2633}
2634
c46ee386
AAJ		 2635static int pn533_probe(struct usb_interface *interface,
2636 const struct usb_device_id *id)
2637{
cb950d93 2638 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2639 struct pn533 *dev;
2640 struct usb_host_interface *iface_desc;
2641 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2642 int in_endpoint = 0;
2643 int out_endpoint = 0;
2644 int rc = -ENOMEM;
2645 int i;
2646 u32 protocols;
2647
2648 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2649 if (!dev)
2650 return -ENOMEM;
2651
2652 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2653 dev->interface = interface;
0201ed03 2654 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2655
2656 iface_desc = interface->cur_altsetting;
2657 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2658 endpoint = &iface_desc->endpoint[i].desc;
2659
8d25ca79 2660 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2661 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2662
8d25ca79 2663 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2664 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2665 }
2666
2667 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2668 nfc_dev_err(&interface->dev,
2669 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2670 rc = -ENODEV;
2671 goto error;
2672 }
2673
c46ee386 2674 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2675 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2676
a5798094 2677 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2678 goto error;
2679
2680 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2681 usb_rcvbulkpipe(dev->udev, in_endpoint),
2682 NULL, 0, NULL, dev);
c46ee386 2683 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2684 usb_sndbulkpipe(dev->udev, out_endpoint),
2685 NULL, 0, pn533_send_complete, dev);
c46ee386 2686
5d50b364
SO		 2687 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2688 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2689 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2690 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2691 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2692 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2693 if (dev->wq == NULL)
2694 goto error;
c46ee386 2695
6fbbdc16
SO		 2696 init_timer(&dev->listen_timer);
2697 dev->listen_timer.data = (unsigned long) dev;
2698 dev->listen_timer.function = pn533_listen_mode_timer;
2699
6ff73fd2
SO		 2700 skb_queue_head_init(&dev->resp_q);
2701
5d50b364
SO		 2702 INIT_LIST_HEAD(&dev->cmd_queue);
2703
c46ee386
AAJ		 2704 usb_set_intfdata(interface, dev);
2705
9e2d493e 2706 dev->ops = &pn533_std_frame_ops;
c46ee386 2707
58520373 2708 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
5c7b0531
SO		 2709 dev->device_type = id->driver_info;
2710 switch (dev->device_type) {
2711 case PN533_DEVICE_STD:
2712 protocols = PN533_ALL_PROTOCOLS;
2713 break;
2714
2715 case PN533_DEVICE_PASORI:
2716 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2717 break;
2718
53cf4839
WR		 2719 case PN533_DEVICE_ACR122U:
2720 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2721 dev->ops = &pn533_acr122_frame_ops;
2722 dev->protocol_type = PN533_PROTO_REQ_RESP,
2723
2724 rc = pn533_acr122_poweron_rdr(dev);
2725 if (rc < 0) {
2726 nfc_dev_err(&dev->interface->dev,
2727 "Couldn't poweron the reader (error %d)",
2728 rc);
2729 goto destroy_wq;
2730 }
2731 break;
2732
5c7b0531
SO		 2733 default:
2734 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2735 dev->device_type);
2736 rc = -EINVAL;
2737 goto destroy_wq;
2738 }
c46ee386 2739
9e2d493e
WR		 2740 memset(&fw_ver, 0, sizeof(fw_ver));
2741 rc = pn533_get_firmware_version(dev, &fw_ver);
2742 if (rc < 0)
2743 goto destroy_wq;
2744
2745 nfc_dev_info(&dev->interface->dev,
2746 "NXP PN533 firmware ver %d.%d now attached",
2747 fw_ver.ver, fw_ver.rev);
2748
2749
e8753043 2750 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
390a1bd8 2751 NFC_SE_NONE,
9e2d493e 2752 dev->ops->tx_header_len +
e8753043 2753 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2754 dev->ops->tx_tail_len);
c46ee386 2755 if (!dev->nfc_dev)
4849f85e 2756 goto destroy_wq;
c46ee386
AAJ		 2757
2758 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2759 nfc_set_drvdata(dev->nfc_dev, dev);
2760
2761 rc = nfc_register_device(dev->nfc_dev);
2762 if (rc)
2763 goto free_nfc_dev;
2764
5c7b0531
SO		 2765 rc = pn533_setup(dev);
2766 if (rc)
34a85bfc 2767 goto unregister_nfc_dev;
34a85bfc 2768
c46ee386
AAJ		 2769 return 0;
2770
9f2f8ba1
SO		 2771unregister_nfc_dev:
2772 nfc_unregister_device(dev->nfc_dev);
2773
c46ee386
AAJ		 2774free_nfc_dev:
2775 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2776
4849f85e
SO		 2777destroy_wq:
2778 destroy_workqueue(dev->wq);
c46ee386 2779error:
c46ee386 2780 usb_free_urb(dev->in_urb);
c46ee386 2781 usb_free_urb(dev->out_urb);
7c5a54fb 2782 usb_put_dev(dev->udev);
c46ee386
AAJ		 2783 kfree(dev);
2784 return rc;
2785}
2786
2787static void pn533_disconnect(struct usb_interface *interface)
2788{
2789 struct pn533 *dev;
5d50b364 2790 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2791
2792 dev = usb_get_intfdata(interface);
2793 usb_set_intfdata(interface, NULL);
2794
2795 nfc_unregister_device(dev->nfc_dev);
2796 nfc_free_device(dev->nfc_dev);
2797
2798 usb_kill_urb(dev->in_urb);
2799 usb_kill_urb(dev->out_urb);
2800
4849f85e 2801 destroy_workqueue(dev->wq);
c46ee386 2802
6ff73fd2
SO		 2803 skb_queue_purge(&dev->resp_q);
2804
6fbbdc16
SO		 2805 del_timer(&dev->listen_timer);
2806
5d50b364
SO		 2807 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2808 list_del(&cmd->queue);
2809 kfree(cmd);
2810 }
2811
c46ee386 2812 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2813 usb_free_urb(dev->out_urb);
2814 kfree(dev);
2815
276556db 2816 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2817}
2818
2819static struct usb_driver pn533_driver = {
2820 .name = "pn533",
2821 .probe = pn533_probe,
2822 .disconnect = pn533_disconnect,
2823 .id_table = pn533_table,
2824};
2825
fe748483 2826module_usb_driver(pn533_driver);
c46ee386 2827
e70b96e9
WR		 2828MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2829MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2830MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2831MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2832MODULE_VERSION(VERSION);
2833MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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