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NFC: pn533: Fix hardware busy loop when establishing the LLCP link
[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 */
60d9edd5
SO		 166#define PN533_CFGITEM_RF_FIELD 0x01
167#define PN533_CFGITEM_TIMING 0x02
c46ee386 168#define PN533_CFGITEM_MAX_RETRIES 0x05
60d9edd5
SO		 169#define PN533_CFGITEM_PASORI 0x82
170
171#define PN533_CFGITEM_RF_FIELD_ON 0x1
172#define PN533_CFGITEM_RF_FIELD_OFF 0x0
c46ee386 173
34a85bfc
SO		 174#define PN533_CONFIG_TIMING_102 0xb
175#define PN533_CONFIG_TIMING_204 0xc
176#define PN533_CONFIG_TIMING_409 0xd
177#define PN533_CONFIG_TIMING_819 0xe
178
c46ee386
AAJ		 179#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
180#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
181
182struct pn533_config_max_retries {
183 u8 mx_rty_atr;
184 u8 mx_rty_psl;
185 u8 mx_rty_passive_act;
186} __packed;
187
34a85bfc
SO		 188struct pn533_config_timing {
189 u8 rfu;
190 u8 atr_res_timeout;
191 u8 dep_timeout;
192} __packed;
193
c46ee386
AAJ		 194/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
195
196/* felica commands opcode */
197#define PN533_FELICA_OPC_SENSF_REQ 0
198#define PN533_FELICA_OPC_SENSF_RES 1
199/* felica SENSF_REQ parameters */
200#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
201#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
202#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
203#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
204
205/* type B initiator_data values */
206#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
207#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
208#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
209
210union pn533_cmd_poll_initdata {
211 struct {
212 u8 afi;
213 u8 polling_method;
214 } __packed type_b;
215 struct {
216 u8 opcode;
217 __be16 sc;
218 u8 rc;
219 u8 tsn;
220 } __packed felica;
221};
222
223/* Poll modulations */
224enum {
225 PN533_POLL_MOD_106KBPS_A,
226 PN533_POLL_MOD_212KBPS_FELICA,
227 PN533_POLL_MOD_424KBPS_FELICA,
228 PN533_POLL_MOD_106KBPS_JEWEL,
229 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 230 PN533_LISTEN_MOD,
c46ee386
AAJ		 231
232 __PN533_POLL_MOD_AFTER_LAST,
233};
234#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
235
236struct pn533_poll_modulations {
237 struct {
238 u8 maxtg;
239 u8 brty;
240 union pn533_cmd_poll_initdata initiator_data;
241 } __packed data;
242 u8 len;
243};
244
ef3d56e1 245static const struct pn533_poll_modulations poll_mod[] = {
c46ee386
AAJ		 246 [PN533_POLL_MOD_106KBPS_A] = {
247 .data = {
248 .maxtg = 1,
249 .brty = 0,
250 },
251 .len = 2,
252 },
253 [PN533_POLL_MOD_212KBPS_FELICA] = {
254 .data = {
255 .maxtg = 1,
256 .brty = 1,
257 .initiator_data.felica = {
258 .opcode = PN533_FELICA_OPC_SENSF_REQ,
259 .sc = PN533_FELICA_SENSF_SC_ALL,
260 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
31c44464 261 .tsn = 0x03,
c46ee386
AAJ		 262 },
263 },
264 .len = 7,
265 },
266 [PN533_POLL_MOD_424KBPS_FELICA] = {
267 .data = {
268 .maxtg = 1,
269 .brty = 2,
270 .initiator_data.felica = {
271 .opcode = PN533_FELICA_OPC_SENSF_REQ,
272 .sc = PN533_FELICA_SENSF_SC_ALL,
273 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
31c44464 274 .tsn = 0x03,
c46ee386
AAJ		 275 },
276 },
277 .len = 7,
278 },
279 [PN533_POLL_MOD_106KBPS_JEWEL] = {
280 .data = {
281 .maxtg = 1,
282 .brty = 4,
283 },
284 .len = 2,
285 },
286 [PN533_POLL_MOD_847KBPS_B] = {
287 .data = {
288 .maxtg = 1,
289 .brty = 8,
290 .initiator_data.type_b = {
291 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
292 .polling_method =
293 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
294 },
295 },
296 .len = 3,
297 },
6fbbdc16
SO		 298 [PN533_LISTEN_MOD] = {
299 .len = 0,
300 },
c46ee386
AAJ		 301};
302
303/* PN533_CMD_IN_ATR */
304
c46ee386
AAJ		 305struct pn533_cmd_activate_response {
306 u8 status;
307 u8 nfcid3t[10];
308 u8 didt;
309 u8 bst;
310 u8 brt;
311 u8 to;
312 u8 ppt;
313 /* optional */
314 u8 gt[];
315} __packed;
316
361f3cb7
SO		 317struct pn533_cmd_jump_dep_response {
318 u8 status;
319 u8 tg;
320 u8 nfcid3t[10];
321 u8 didt;
322 u8 bst;
323 u8 brt;
324 u8 to;
325 u8 ppt;
326 /* optional */
327 u8 gt[];
328} __packed;
c46ee386 329
ad3823ce
SO		 330
331/* PN533_TG_INIT_AS_TARGET */
332#define PN533_INIT_TARGET_PASSIVE 0x1
333#define PN533_INIT_TARGET_DEP 0x2
334
fc40a8c1
SO		 335#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
336#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
337#define PN533_INIT_TARGET_RESP_DEP 0x4
338
58520373
WR		 339enum pn533_protocol_type {
340 PN533_PROTO_REQ_ACK_RESP = 0,
341 PN533_PROTO_REQ_RESP
342};
343
c46ee386
AAJ		 344struct pn533 {
345 struct usb_device *udev;
346 struct usb_interface *interface;
347 struct nfc_dev *nfc_dev;
d5590bba 348 u32 device_type;
58520373 349 enum pn533_protocol_type protocol_type;
c46ee386
AAJ		 350
351 struct urb *out_urb;
c46ee386 352 struct urb *in_urb;
c46ee386 353
6ff73fd2
SO		 354 struct sk_buff_head resp_q;
355
4849f85e
SO		 356 struct workqueue_struct *wq;
357 struct work_struct cmd_work;
5d50b364 358 struct work_struct cmd_complete_work;
6fbbdc16 359 struct work_struct poll_work;
6ff73fd2 360 struct work_struct mi_work;
103b34cf 361 struct work_struct tg_work;
d5590bba
WR		 362
363 struct list_head cmd_queue;
364 struct pn533_cmd *cmd;
365 u8 cmd_pending;
d5590bba 366 struct mutex cmd_lock; /* protects cmd queue */
c46ee386 367
b1e666f5 368 void *cmd_complete_mi_arg;
c46ee386
AAJ		 369
370 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
371 u8 poll_mod_count;
372 u8 poll_mod_curr;
373 u32 poll_protocols;
6fbbdc16 374 u32 listen_protocols;
d5590bba
WR		 375 struct timer_list listen_timer;
376 int cancel_listen;
6fbbdc16
SO		 377
378 u8 *gb;
379 size_t gb_len;
c46ee386
AAJ		 380
381 u8 tgt_available_prots;
382 u8 tgt_active_prot;
51ad304c 383 u8 tgt_mode;
5c7b0531 384
9e2d493e 385 struct pn533_frame_ops *ops;
5d50b364
SO		 386};
387
388struct pn533_cmd {
389 struct list_head queue;
4b2a9532 390 u8 code;
f87bc9fb 391 int status;
aada17ac
WR		 392 struct sk_buff *req;
393 struct sk_buff *resp;
9e2d493e 394 int resp_len;
4231604b
WR		 395 pn533_send_async_complete_t complete_cb;
396 void *complete_cb_context;
c46ee386
AAJ		 397};
398
63123108 399struct pn533_std_frame {
c46ee386
AAJ		 400 u8 preamble;
401 __be16 start_frame;
402 u8 datalen;
403 u8 datalen_checksum;
404 u8 data[];
405} __packed;
406
9e2d493e
WR		 407struct pn533_frame_ops {
408 void (*tx_frame_init)(void *frame, u8 cmd_code);
409 void (*tx_frame_finish)(void *frame);
410 void (*tx_update_payload_len)(void *frame, int len);
411 int tx_header_len;
412 int tx_tail_len;
413
414 bool (*rx_is_frame_valid)(void *frame);
415 int (*rx_frame_size)(void *frame);
416 int rx_header_len;
417 int rx_tail_len;
418
419 int max_payload_len;
420 u8 (*get_cmd_code)(void *frame);
421};
422
53cf4839
WR		 423struct pn533_acr122_ccid_hdr {
424 u8 type;
425 u32 datalen;
426 u8 slot;
427 u8 seq;
428 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
429 byte for reposnse msg */
430 u8 data[]; /* payload */
431} __packed;
432
433struct pn533_acr122_apdu_hdr {
434 u8 class;
435 u8 ins;
436 u8 p1;
437 u8 p2;
438} __packed;
439
440struct pn533_acr122_tx_frame {
441 struct pn533_acr122_ccid_hdr ccid;
442 struct pn533_acr122_apdu_hdr apdu;
443 u8 datalen;
444 u8 data[]; /* pn533 frame: TFI ... */
445} __packed;
446
447struct pn533_acr122_rx_frame {
448 struct pn533_acr122_ccid_hdr ccid;
449 u8 data[]; /* pn533 frame : TFI ... */
450} __packed;
451
452static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
453{
454 struct pn533_acr122_tx_frame *frame = _frame;
455
456 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
457 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
458 sizeof(datalen) */
459 frame->ccid.slot = 0;
460 frame->ccid.seq = 0;
461 frame->ccid.params[0] = 0;
462 frame->ccid.params[1] = 0;
463 frame->ccid.params[2] = 0;
464
465 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
466 frame->data[1] = cmd_code;
467 frame->datalen = 2; /* data[0] + data[1] */
468
469 frame->apdu.class = 0xFF;
470 frame->apdu.ins = 0;
471 frame->apdu.p1 = 0;
472 frame->apdu.p2 = 0;
473}
474
475static void pn533_acr122_tx_frame_finish(void *_frame)
476{
477 struct pn533_acr122_tx_frame *frame = _frame;
478
479 frame->ccid.datalen += frame->datalen;
480}
481
482static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
483{
484 struct pn533_acr122_tx_frame *frame = _frame;
485
486 frame->datalen += len;
487}
488
489static bool pn533_acr122_is_rx_frame_valid(void *_frame)
490{
491 struct pn533_acr122_rx_frame *frame = _frame;
492
493 if (frame->ccid.type != 0x83)
494 return false;
495
496 if (frame->data[frame->ccid.datalen - 2] == 0x63)
497 return false;
498
499 return true;
500}
501
502static int pn533_acr122_rx_frame_size(void *frame)
503{
504 struct pn533_acr122_rx_frame *f = frame;
505
506 /* f->ccid.datalen already includes tail length */
507 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
508}
509
510static u8 pn533_acr122_get_cmd_code(void *frame)
511{
512 struct pn533_acr122_rx_frame *f = frame;
513
514 return PN533_STD_FRAME_CMD(f);
515}
516
517static struct pn533_frame_ops pn533_acr122_frame_ops = {
518 .tx_frame_init = pn533_acr122_tx_frame_init,
519 .tx_frame_finish = pn533_acr122_tx_frame_finish,
520 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
521 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
522 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
523
524 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
525 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
526 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
527 .rx_frame_size = pn533_acr122_rx_frame_size,
528
529 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
530 .get_cmd_code = pn533_acr122_get_cmd_code,
531};
532
c46ee386 533/* The rule: value + checksum = 0 */
63123108 534static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 535{
536 return ~value + 1;
537}
538
539/* The rule: sum(data elements) + checksum = 0 */
63123108 540static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 541{
542 u8 sum = 0;
543 int i;
544
545 for (i = 0; i < datalen; i++)
546 sum += data[i];
547
63123108 548 return pn533_std_checksum(sum);
c46ee386
AAJ		 549}
550
63123108 551static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 552{
63123108 553 struct pn533_std_frame *frame = _frame;
9e2d493e 554
c46ee386 555 frame->preamble = 0;
63123108
WR		 556 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
557 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
558 PN533_STD_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 559 frame->datalen = 2;
560}
561
63123108 562static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 563{
63123108 564 struct pn533_std_frame *frame = _frame;
9e2d493e 565
63123108 566 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 567
63123108
WR		 568 PN533_STD_FRAME_CHECKSUM(frame) =
569 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 570
63123108 571 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 572}
573
63123108 574static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 575{
63123108 576 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 577
578 frame->datalen += len;
579}
580
63123108 581static bool pn533_std_rx_frame_is_valid(void *_frame)
c46ee386
AAJ		 582{
583 u8 checksum;
63123108 584 struct pn533_std_frame *frame = _frame;
c46ee386 585
63123108 586 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 587 return false;
588
63123108 589 checksum = pn533_std_checksum(frame->datalen);
c46ee386
AAJ		 590 if (checksum != frame->datalen_checksum)
591 return false;
592
63123108
WR		 593 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
594 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
c46ee386
AAJ		 595 return false;
596
597 return true;
598}
599
63123108 600static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 601{
63123108 602 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 603 return false;
604
605 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
606 return false;
607
608 return true;
609}
610
63123108 611static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 612{
63123108 613 struct pn533_std_frame *f = frame;
9e2d493e 614
63123108
WR		 615 return sizeof(struct pn533_std_frame) + f->datalen +
616 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 617}
618
63123108 619static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 620{
63123108 621 struct pn533_std_frame *f = frame;
9e2d493e 622
63123108 623 return PN533_STD_FRAME_CMD(f);
9e2d493e
WR		 624}
625
ef3d56e1 626static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 627 .tx_frame_init = pn533_std_tx_frame_init,
628 .tx_frame_finish = pn533_std_tx_frame_finish,
629 .tx_update_payload_len = pn533_std_tx_update_payload_len,
630 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
631 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
632
633 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
634 .rx_frame_size = pn533_std_rx_frame_size,
635 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
636 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
637
638 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
639 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 640};
641
642static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 643{
2c206fb7 644 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 645 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 646}
647
c46ee386
AAJ		 648static void pn533_recv_response(struct urb *urb)
649{
650 struct pn533 *dev = urb->context;
f87bc9fb 651 struct pn533_cmd *cmd = dev->cmd;
9e2d493e 652 u8 *in_frame;
c46ee386 653
f87bc9fb
WR		 654 cmd->status = urb->status;
655
c46ee386
AAJ		 656 switch (urb->status) {
657 case 0:
f8f99171 658 break; /* success */
c46ee386
AAJ		 659 case -ECONNRESET:
660 case -ENOENT:
6ca55372 661 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 662 "The urb has been canceled (status %d)",
663 urb->status);
4849f85e 664 goto sched_wq;
f8f99171 665 case -ESHUTDOWN:
c46ee386 666 default:
6ca55372 667 nfc_dev_err(&dev->interface->dev,
f8f99171 668 "Urb failure (status %d)", urb->status);
4849f85e 669 goto sched_wq;
c46ee386
AAJ		 670 }
671
672 in_frame = dev->in_urb->transfer_buffer;
673
fcfafc76 674 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
e279f84f
SO		 675 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
676 dev->ops->rx_frame_size(in_frame), false);
99e591be 677
9e2d493e 678 if (!dev->ops->rx_is_frame_valid(in_frame)) {
c46ee386 679 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
f87bc9fb 680 cmd->status = -EIO;
4849f85e 681 goto sched_wq;
c46ee386
AAJ		 682 }
683
9e2d493e 684 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 685 nfc_dev_err(&dev->interface->dev,
686 "It it not the response to the last command");
f87bc9fb 687 cmd->status = -EIO;
4849f85e 688 goto sched_wq;
c46ee386
AAJ		 689 }
690
4849f85e 691sched_wq:
5d50b364 692 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 693}
694
695static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
696{
697 dev->in_urb->complete = pn533_recv_response;
698
699 return usb_submit_urb(dev->in_urb, flags);
700}
701
702static void pn533_recv_ack(struct urb *urb)
703{
704 struct pn533 *dev = urb->context;
f87bc9fb 705 struct pn533_cmd *cmd = dev->cmd;
63123108 706 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 707 int rc;
708
f87bc9fb
WR		 709 cmd->status = urb->status;
710
c46ee386
AAJ		 711 switch (urb->status) {
712 case 0:
f8f99171 713 break; /* success */
c46ee386
AAJ		 714 case -ECONNRESET:
715 case -ENOENT:
6ca55372 716 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 717 "The urb has been stopped (status %d)",
718 urb->status);
4849f85e 719 goto sched_wq;
f8f99171 720 case -ESHUTDOWN:
c46ee386 721 default:
6ca55372 722 nfc_dev_err(&dev->interface->dev,
f8f99171 723 "Urb failure (status %d)", urb->status);
4849f85e 724 goto sched_wq;
c46ee386
AAJ		 725 }
726
727 in_frame = dev->in_urb->transfer_buffer;
728
63123108 729 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 730 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
f87bc9fb 731 cmd->status = -EIO;
4849f85e 732 goto sched_wq;
c46ee386
AAJ		 733 }
734
c46ee386
AAJ		 735 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
736 if (rc) {
6ca55372
WR		 737 nfc_dev_err(&dev->interface->dev,
738 "usb_submit_urb failed with result %d", rc);
f87bc9fb 739 cmd->status = rc;
4849f85e 740 goto sched_wq;
c46ee386
AAJ		 741 }
742
743 return;
744
4849f85e 745sched_wq:
5d50b364 746 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 747}
748
749static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
750{
751 dev->in_urb->complete = pn533_recv_ack;
752
753 return usb_submit_urb(dev->in_urb, flags);
754}
755
756static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
757{
63123108 758 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 759 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 760 int rc;
761
762 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
763
5b5a4437
WR		 764 dev->out_urb->transfer_buffer = ack;
765 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 766 rc = usb_submit_urb(dev->out_urb, flags);
767
768 return rc;
769}
770
e8f40531
WR		 771static int __pn533_send_frame_async(struct pn533 *dev,
772 struct sk_buff *out,
773 struct sk_buff *in,
ddf19d20 774 int in_len)
c46ee386
AAJ		 775{
776 int rc;
777
e8f40531
WR		 778 dev->out_urb->transfer_buffer = out->data;
779 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 780
e8f40531
WR		 781 dev->in_urb->transfer_buffer = in->data;
782 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 783
e279f84f
SO		 784 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
785 out->data, out->len, false);
99e591be 786
d94ea4f5 787 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 788 if (rc)
789 return rc;
790
58520373
WR		 791 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
792 /* request for response for sent packet directly */
793 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
794 if (rc)
795 goto error;
796 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
797 /* request for ACK if that's the case */
798 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
799 if (rc)
800 goto error;
801 }
c46ee386
AAJ		 802
803 return 0;
804
805error:
806 usb_unlink_urb(dev->out_urb);
807 return rc;
808}
809
9e2d493e
WR		 810static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
811 struct sk_buff *skb)
aada17ac 812{
aada17ac
WR		 813 /* payload is already there, just update datalen */
814 int payload_len = skb->len;
9e2d493e 815 struct pn533_frame_ops *ops = dev->ops;
aada17ac 816
aada17ac 817
9e2d493e
WR		 818 skb_push(skb, ops->tx_header_len);
819 skb_put(skb, ops->tx_tail_len);
aada17ac 820
9e2d493e
WR		 821 ops->tx_frame_init(skb->data, cmd_code);
822 ops->tx_update_payload_len(skb->data, payload_len);
823 ops->tx_frame_finish(skb->data);
aada17ac
WR		 824}
825
ddf19d20 826static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 827{
ddf19d20 828 struct pn533_cmd *cmd = dev->cmd;
f87bc9fb 829 int status = cmd->status;
aada17ac 830
4231604b
WR		 831 struct sk_buff *req = cmd->req;
832 struct sk_buff *resp = cmd->resp;
aada17ac 833
aada17ac
WR		 834 int rc;
835
836 dev_kfree_skb(req);
837
0c33d262 838 if (status < 0) {
4231604b
WR		 839 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
840 ERR_PTR(status));
aada17ac 841 dev_kfree_skb(resp);
2c206fb7 842 goto done;
aada17ac
WR		 843 }
844
9e2d493e
WR		 845 skb_put(resp, dev->ops->rx_frame_size(resp->data));
846 skb_pull(resp, dev->ops->rx_header_len);
847 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 848
4231604b 849 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 850
2c206fb7 851done:
4231604b 852 kfree(cmd);
2c206fb7 853 dev->cmd = NULL;
aada17ac
WR		 854 return rc;
855}
856
857static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
858 struct sk_buff *req, struct sk_buff *resp,
859 int resp_len,
860 pn533_send_async_complete_t complete_cb,
861 void *complete_cb_context)
862{
863 struct pn533_cmd *cmd;
aada17ac
WR		 864 int rc = 0;
865
fcfafc76 866 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 867
4231604b
WR		 868 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
869 if (!cmd)
aada17ac
WR		 870 return -ENOMEM;
871
4b2a9532 872 cmd->code = cmd_code;
4231604b
WR		 873 cmd->req = req;
874 cmd->resp = resp;
875 cmd->resp_len = resp_len;
876 cmd->complete_cb = complete_cb;
877 cmd->complete_cb_context = complete_cb_context;
aada17ac 878
9e2d493e 879 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 880
881 mutex_lock(&dev->cmd_lock);
882
883 if (!dev->cmd_pending) {
ddf19d20 884 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 885 if (rc)
886 goto error;
887
888 dev->cmd_pending = 1;
2c206fb7 889 dev->cmd = cmd;
aada17ac
WR		 890 goto unlock;
891 }
892
fcfafc76
WR		 893 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
894 cmd_code);
aada17ac 895
aada17ac 896 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 897 list_add_tail(&cmd->queue, &dev->cmd_queue);
898
899 goto unlock;
900
901error:
4231604b 902 kfree(cmd);
aada17ac
WR		 903unlock:
904 mutex_unlock(&dev->cmd_lock);
905 return rc;
15461aeb
WR		 906}
907
908static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
909 struct sk_buff *req,
910 pn533_send_async_complete_t complete_cb,
911 void *complete_cb_context)
912{
913 struct sk_buff *resp;
914 int rc;
9e2d493e
WR		 915 int resp_len = dev->ops->rx_header_len +
916 dev->ops->max_payload_len +
917 dev->ops->rx_tail_len;
15461aeb 918
15461aeb
WR		 919 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
920 if (!resp)
921 return -ENOMEM;
922
923 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
924 complete_cb_context);
925 if (rc)
926 dev_kfree_skb(resp);
927
928 return rc;
aada17ac
WR		 929}
930
931static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
932 struct sk_buff *req,
933 pn533_send_async_complete_t complete_cb,
934 void *complete_cb_context)
935{
936 struct sk_buff *resp;
937 int rc;
9e2d493e
WR		 938 int resp_len = dev->ops->rx_header_len +
939 dev->ops->max_payload_len +
940 dev->ops->rx_tail_len;
aada17ac 941
9e2d493e 942 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 943 if (!resp)
944 return -ENOMEM;
945
9e2d493e
WR		 946 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
947 complete_cb_context);
aada17ac
WR		 948 if (rc)
949 dev_kfree_skb(resp);
950
951 return rc;
952}
953
b1e666f5
WR		 954/*
955 * pn533_send_cmd_direct_async
956 *
957 * The function sends a piority cmd directly to the chip omiting the cmd
958 * queue. It's intended to be used by chaining mechanism of received responses
959 * where the host has to request every single chunk of data before scheduling
960 * next cmd from the queue.
961 */
962static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
963 struct sk_buff *req,
964 pn533_send_async_complete_t complete_cb,
965 void *complete_cb_context)
966{
b1e666f5 967 struct sk_buff *resp;
4231604b 968 struct pn533_cmd *cmd;
b1e666f5 969 int rc;
9e2d493e
WR		 970 int resp_len = dev->ops->rx_header_len +
971 dev->ops->max_payload_len +
972 dev->ops->rx_tail_len;
b1e666f5 973
b1e666f5
WR		 974 resp = alloc_skb(resp_len, GFP_KERNEL);
975 if (!resp)
976 return -ENOMEM;
977
4231604b
WR		 978 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
979 if (!cmd) {
b1e666f5
WR		 980 dev_kfree_skb(resp);
981 return -ENOMEM;
982 }
983
4b2a9532 984 cmd->code = cmd_code;
4231604b
WR		 985 cmd->req = req;
986 cmd->resp = resp;
987 cmd->resp_len = resp_len;
988 cmd->complete_cb = complete_cb;
989 cmd->complete_cb_context = complete_cb_context;
b1e666f5 990
9e2d493e 991 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 992
ddf19d20 993 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 994 if (rc < 0) {
995 dev_kfree_skb(resp);
4231604b 996 kfree(cmd);
2c206fb7
WR		 997 } else {
998 dev->cmd = cmd;
b1e666f5
WR		 999 }
1000
1001 return rc;
1002}
1003
c79490e1
WR		 1004static void pn533_wq_cmd_complete(struct work_struct *work)
1005{
1006 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1007 int rc;
1008
1009 rc = pn533_send_async_complete(dev);
1010 if (rc != -EINPROGRESS)
1011 queue_work(dev->wq, &dev->cmd_work);
1012}
1013
5d50b364
SO		 1014static void pn533_wq_cmd(struct work_struct *work)
1015{
1016 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1017 struct pn533_cmd *cmd;
0ce1fbdd 1018 int rc;
5d50b364
SO		 1019
1020 mutex_lock(&dev->cmd_lock);
1021
1022 if (list_empty(&dev->cmd_queue)) {
1023 dev->cmd_pending = 0;
1024 mutex_unlock(&dev->cmd_lock);
1025 return;
1026 }
1027
1028 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1029
60ad07ab
SJ		 1030 list_del(&cmd->queue);
1031
5d50b364
SO		 1032 mutex_unlock(&dev->cmd_lock);
1033
ddf19d20 1034 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 1035 if (rc < 0) {
1036 dev_kfree_skb(cmd->req);
1037 dev_kfree_skb(cmd->resp);
4231604b 1038 kfree(cmd);
2c206fb7 1039 return;
0ce1fbdd 1040 }
2c206fb7
WR		 1041
1042 dev->cmd = cmd;
5d50b364
SO		 1043}
1044
c46ee386 1045struct pn533_sync_cmd_response {
94c5c156 1046 struct sk_buff *resp;
c46ee386
AAJ		 1047 struct completion done;
1048};
1049
94c5c156
WR		 1050static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1051 struct sk_buff *resp)
1052{
1053 struct pn533_sync_cmd_response *arg = _arg;
1054
94c5c156
WR		 1055 arg->resp = resp;
1056 complete(&arg->done);
1057
1058 return 0;
1059}
1060
1061/* pn533_send_cmd_sync
1062 *
1063 * Please note the req parameter is freed inside the function to
1064 * limit a number of return value interpretations by the caller.
1065 *
1066 * 1. negative in case of error during TX path -> req should be freed
1067 *
1068 * 2. negative in case of error during RX path -> req should not be freed
1069 * as it's been already freed at the begining of RX path by
1070 * async_complete_cb.
1071 *
1072 * 3. valid pointer in case of succesfult RX path
1073 *
1074 * A caller has to check a return value with IS_ERR macro. If the test pass,
1075 * the returned pointer is valid.
1076 *
1077 * */
1078static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1079 struct sk_buff *req)
1080{
1081 int rc;
1082 struct pn533_sync_cmd_response arg;
1083
94c5c156
WR		 1084 init_completion(&arg.done);
1085
1086 rc = pn533_send_cmd_async(dev, cmd_code, req,
1087 pn533_send_sync_complete, &arg);
1088 if (rc) {
1089 dev_kfree_skb(req);
1090 return ERR_PTR(rc);
1091 }
1092
1093 wait_for_completion(&arg.done);
1094
1095 return arg.resp;
1096}
1097
c46ee386
AAJ		 1098static void pn533_send_complete(struct urb *urb)
1099{
1100 struct pn533 *dev = urb->context;
1101
c46ee386
AAJ		 1102 switch (urb->status) {
1103 case 0:
f8f99171 1104 break; /* success */
c46ee386
AAJ		 1105 case -ECONNRESET:
1106 case -ENOENT:
6ca55372 1107 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 1108 "The urb has been stopped (status %d)",
1109 urb->status);
c46ee386 1110 break;
f8f99171 1111 case -ESHUTDOWN:
c46ee386 1112 default:
f8f99171
WR		 1113 nfc_dev_err(&dev->interface->dev,
1114 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 1115 }
1116}
1117
10cff29a
WR		 1118static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1119{
1120 /* ACR122U does not support any command which aborts last
1121 * issued command i.e. as ACK for standard PN533. Additionally,
1122 * it behaves stange, sending broken or incorrect responses,
1123 * when we cancel urb before the chip will send response.
1124 */
1125 if (dev->device_type == PN533_DEVICE_ACR122U)
1126 return;
1127
1128 /* An ack will cancel the last issued command */
1129 pn533_send_ack(dev, flags);
1130
1131 /* cancel the urb request */
1132 usb_kill_urb(dev->in_urb);
1133}
1134
9e2d493e 1135static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 1136{
1137 struct sk_buff *skb;
1138
9e2d493e 1139 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 1140 size +
9e2d493e 1141 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 1142
1143 if (skb)
9e2d493e 1144 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 1145
1146 return skb;
1147}
1148
c46ee386
AAJ		 1149struct pn533_target_type_a {
1150 __be16 sens_res;
1151 u8 sel_res;
1152 u8 nfcid_len;
1153 u8 nfcid_data[];
1154} __packed;
1155
1156
1157#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1158#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1159#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1160
1161#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1162#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1163
1164#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1165#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1166
1167#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1168#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1169#define PN533_TYPE_A_SEL_PROT_DEP 2
1170#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1171
1172static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1173 int target_data_len)
1174{
1175 u8 ssd;
1176 u8 platconf;
1177
1178 if (target_data_len < sizeof(struct pn533_target_type_a))
1179 return false;
1180
1181 /* The lenght check of nfcid[] and ats[] are not being performed because
1182 the values are not being used */
1183
1184 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1185 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1186 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1187
1188 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1189 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1190 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1191 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1192 return false;
1193
1194 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1195 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1196 return false;
1197
1198 return true;
1199}
1200
1201static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1202 int tgt_data_len)
1203{
1204 struct pn533_target_type_a *tgt_type_a;
1205
37cf4fc6 1206 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1207
1208 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1209 return -EPROTO;
1210
1211 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1212 case PN533_TYPE_A_SEL_PROT_MIFARE:
1213 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1214 break;
1215 case PN533_TYPE_A_SEL_PROT_ISO14443:
1216 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1217 break;
1218 case PN533_TYPE_A_SEL_PROT_DEP:
1219 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1220 break;
1221 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1222 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1223 NFC_PROTO_NFC_DEP_MASK;
1224 break;
1225 }
1226
1227 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1228 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1229 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1230 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1231
1232 return 0;
1233}
1234
1235struct pn533_target_felica {
1236 u8 pol_res;
1237 u8 opcode;
322bce95 1238 u8 nfcid2[NFC_NFCID2_MAXSIZE];
c46ee386
AAJ		 1239 u8 pad[8];
1240 /* optional */
1241 u8 syst_code[];
1242} __packed;
1243
1244#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1245#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1246
1247static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1248 int target_data_len)
1249{
1250 if (target_data_len < sizeof(struct pn533_target_felica))
1251 return false;
1252
1253 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1254 return false;
1255
1256 return true;
1257}
1258
1259static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1260 int tgt_data_len)
1261{
1262 struct pn533_target_felica *tgt_felica;
1263
37cf4fc6 1264 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1265
1266 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1267 return -EPROTO;
1268
5d467742
WR		 1269 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1270 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1271 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1272 else
1273 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1274
7975754f
SO		 1275 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1276 nfc_tgt->sensf_res_len = 9;
1277
322bce95
SO		 1278 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1279 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1280
c46ee386
AAJ		 1281 return 0;
1282}
1283
1284struct pn533_target_jewel {
1285 __be16 sens_res;
1286 u8 jewelid[4];
1287} __packed;
1288
1289static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1290 int target_data_len)
1291{
1292 u8 ssd;
1293 u8 platconf;
1294
1295 if (target_data_len < sizeof(struct pn533_target_jewel))
1296 return false;
1297
1298 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1299 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1300 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1301
1302 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1303 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1304 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1305 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1306 return false;
1307
1308 return true;
1309}
1310
1311static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1312 int tgt_data_len)
1313{
1314 struct pn533_target_jewel *tgt_jewel;
1315
37cf4fc6 1316 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1317
1318 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1319 return -EPROTO;
1320
1321 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1322 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1323 nfc_tgt->nfcid1_len = 4;
1324 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1325
1326 return 0;
1327}
1328
1329struct pn533_type_b_prot_info {
1330 u8 bitrate;
1331 u8 fsci_type;
1332 u8 fwi_adc_fo;
1333} __packed;
1334
1335#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1336#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1337#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1338
1339struct pn533_type_b_sens_res {
1340 u8 opcode;
1341 u8 nfcid[4];
1342 u8 appdata[4];
1343 struct pn533_type_b_prot_info prot_info;
1344} __packed;
1345
1346#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1347
1348struct pn533_target_type_b {
1349 struct pn533_type_b_sens_res sensb_res;
1350 u8 attrib_res_len;
1351 u8 attrib_res[];
1352} __packed;
1353
1354static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1355 int target_data_len)
1356{
1357 if (target_data_len < sizeof(struct pn533_target_type_b))
1358 return false;
1359
1360 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1361 return false;
1362
1363 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1364 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1365 return false;
1366
1367 return true;
1368}
1369
1370static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1371 int tgt_data_len)
1372{
1373 struct pn533_target_type_b *tgt_type_b;
1374
37cf4fc6 1375 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1376
1377 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1378 return -EPROTO;
1379
01d719a2 1380 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1381
1382 return 0;
1383}
1384
b5193e5d
WR		 1385static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1386 int tgdata_len)
c46ee386 1387{
c46ee386
AAJ		 1388 struct nfc_target nfc_tgt;
1389 int rc;
1390
1391 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1392 dev->poll_mod_curr);
c46ee386 1393
b5193e5d 1394 if (tg != 1)
c46ee386
AAJ		 1395 return -EPROTO;
1396
98b3ac1b
SO		 1397 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1398
c46ee386
AAJ		 1399 switch (dev->poll_mod_curr) {
1400 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1401 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1402 break;
1403 case PN533_POLL_MOD_212KBPS_FELICA:
1404 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1405 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1406 break;
1407 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1408 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1409 break;
1410 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1411 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1412 break;
1413 default:
b5193e5d
WR		 1414 nfc_dev_err(&dev->interface->dev,
1415 "Unknown current poll modulation");
c46ee386
AAJ		 1416 return -EPROTO;
1417 }
1418
1419 if (rc)
1420 return rc;
1421
1422 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1423 nfc_dev_dbg(&dev->interface->dev,
1424 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1425 return -EAGAIN;
1426 }
1427
b5193e5d
WR		 1428 nfc_dev_dbg(&dev->interface->dev,
1429 "Target found - supported protocols: 0x%x",
1430 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1431
1432 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1433
1434 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1435
1436 return 0;
1437}
1438
6fbbdc16
SO		 1439static inline void pn533_poll_next_mod(struct pn533 *dev)
1440{
1441 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1442}
1443
c46ee386
AAJ		 1444static void pn533_poll_reset_mod_list(struct pn533 *dev)
1445{
1446 dev->poll_mod_count = 0;
1447}
1448
1449static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1450{
1451 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1452 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1453 dev->poll_mod_count++;
1454}
1455
6fbbdc16
SO		 1456static void pn533_poll_create_mod_list(struct pn533 *dev,
1457 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1458{
1459 pn533_poll_reset_mod_list(dev);
1460
b08e8603
WR		 1461 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1462 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1463 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1464 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1465
b08e8603
WR		 1466 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1467 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1468 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1469 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1470 }
1471
6fbbdc16 1472 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1473 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1474
01d719a2 1475 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1476 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1477
6fbbdc16
SO		 1478 if (tm_protocols)
1479 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1480}
1481
b5193e5d 1482static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1483{
b5193e5d
WR		 1484 u8 nbtg, tg, *tgdata;
1485 int rc, tgdata_len;
c46ee386
AAJ		 1486
1487 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1488
b5193e5d
WR		 1489 nbtg = resp->data[0];
1490 tg = resp->data[1];
1491 tgdata = &resp->data[2];
1492 tgdata_len = resp->len - 2; /* nbtg + tg */
1493
1494 if (nbtg) {
1495 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1496
1497 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1498 if (rc == 0) {
1499 pn533_poll_reset_mod_list(dev);
1500 return 0;
1501 }
c46ee386
AAJ		 1502 }
1503
6fbbdc16 1504 return -EAGAIN;
c46ee386
AAJ		 1505}
1506
9e2d493e 1507static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1508{
b5193e5d
WR		 1509 struct sk_buff *skb;
1510 u8 *felica, *nfcid3, *gb;
1511
9e2d493e
WR		 1512 u8 *gbytes = dev->gb;
1513 size_t gbytes_len = dev->gb_len;
1514
51d9e803
SO		 1515 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1516 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1517 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1518 0xff, 0xff}; /* System code */
b5193e5d 1519
51d9e803
SO		 1520 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1521 0x0, 0x0, 0x0,
1522 0x40}; /* SEL_RES for DEP */
ad3823ce 1523
b5193e5d
WR		 1524 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1525 felica (18), nfcid3 (10), gb_len (1) */
1526 gbytes_len +
1527 1; /* len Tk*/
ad3823ce 1528
9e2d493e 1529 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1530 if (!skb)
1531 return NULL;
ad3823ce
SO		 1532
1533 /* DEP support only */
52f2eaee 1534 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1535
1536 /* MIFARE params */
1537 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1538
1539 /* Felica params */
b5193e5d
WR		 1540 felica = skb_put(skb, 18);
1541 memcpy(felica, felica_params, 18);
1542 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1543
1544 /* NFCID3 */
b5193e5d
WR		 1545 nfcid3 = skb_put(skb, 10);
1546 memset(nfcid3, 0, 10);
1547 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1548
1549 /* General bytes */
b5193e5d 1550 *skb_put(skb, 1) = gbytes_len;
51d9e803 1551
b5193e5d
WR		 1552 gb = skb_put(skb, gbytes_len);
1553 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1554
b5193e5d
WR		 1555 /* Len Tk */
1556 *skb_put(skb, 1) = 0;
51d9e803 1557
b5193e5d 1558 return skb;
ad3823ce
SO		 1559}
1560
b1bb290a 1561#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1562#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1563static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1564 struct sk_buff *resp)
103b34cf 1565{
e4878823 1566 u8 status;
103b34cf
SO		 1567
1568 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1569
e4878823
WR		 1570 if (IS_ERR(resp))
1571 return PTR_ERR(resp);
103b34cf 1572
e4878823
WR		 1573 status = resp->data[0];
1574 skb_pull(resp, sizeof(status));
103b34cf 1575
e4878823 1576 if (status != 0) {
103b34cf 1577 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1578 dev->tgt_mode = 0;
e4878823 1579 dev_kfree_skb(resp);
103b34cf
SO		 1580 return 0;
1581 }
1582
e4878823 1583 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1584}
1585
1586static void pn533_wq_tg_get_data(struct work_struct *work)
1587{
1588 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1589
e4878823
WR		 1590 struct sk_buff *skb;
1591 int rc;
103b34cf 1592
e4878823 1593 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1594
9e2d493e 1595 skb = pn533_alloc_skb(dev, 0);
e4878823 1596 if (!skb)
103b34cf
SO		 1597 return;
1598
e4878823
WR		 1599 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1600 pn533_tm_get_data_complete, NULL);
103b34cf 1601
e4878823
WR		 1602 if (rc < 0)
1603 dev_kfree_skb(skb);
103b34cf
SO		 1604
1605 return;
1606}
1607
fc40a8c1 1608#define ATR_REQ_GB_OFFSET 17
b5193e5d 1609static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1610{
b5193e5d 1611 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1612 size_t gb_len;
103b34cf 1613 int rc;
ad3823ce
SO		 1614
1615 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1616
b5193e5d 1617 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1618 return -EINVAL;
1619
b5193e5d
WR		 1620 mode = resp->data[0];
1621 cmd = &resp->data[1];
ad3823ce 1622
b5193e5d
WR		 1623 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1624 mode, resp->len);
ad3823ce 1625
b5193e5d
WR		 1626 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1627 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1628 comm_mode = NFC_COMM_ACTIVE;
1629
b5193e5d 1630 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1631 return -EOPNOTSUPP;
1632
b5193e5d
WR		 1633 gb = cmd + ATR_REQ_GB_OFFSET;
1634 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1635
103b34cf
SO		 1636 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1637 comm_mode, gb, gb_len);
1638 if (rc < 0) {
1639 nfc_dev_err(&dev->interface->dev,
1640 "Error when signaling target activation");
1641 return rc;
1642 }
1643
51ad304c 1644 dev->tgt_mode = 1;
103b34cf
SO		 1645 queue_work(dev->wq, &dev->tg_work);
1646
1647 return 0;
fe7c5800
SO		 1648}
1649
6fbbdc16 1650static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1651{
37cf4fc6 1652 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1653
1654 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1655
6fbbdc16
SO		 1656 dev->cancel_listen = 1;
1657
6fbbdc16
SO		 1658 pn533_poll_next_mod(dev);
1659
1660 queue_work(dev->wq, &dev->poll_work);
1661}
1662
1663static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1664 struct sk_buff *resp)
6fbbdc16
SO		 1665{
1666 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1667 int rc;
1668
6fbbdc16 1669 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1670
b5193e5d
WR		 1671 if (IS_ERR(resp)) {
1672 rc = PTR_ERR(resp);
1673
1674 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1675 __func__, rc);
1676
1677 if (rc == -ENOENT) {
1678 if (dev->poll_mod_count != 0)
1679 return rc;
1680 else
1681 goto stop_poll;
1682 } else if (rc < 0) {
1683 nfc_dev_err(&dev->interface->dev,
1684 "Error %d when running poll", rc);
1685 goto stop_poll;
1686 }
6fbbdc16 1687 }
ad3823ce 1688
6fbbdc16
SO		 1689 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1690
b5193e5d 1691 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1692 del_timer(&dev->listen_timer);
b5193e5d
WR		 1693 rc = pn533_init_target_complete(dev, resp);
1694 goto done;
6fbbdc16
SO		 1695 }
1696
b5193e5d
WR		 1697 /* Initiator mode */
1698 rc = pn533_start_poll_complete(dev, resp);
1699 if (!rc)
1700 goto done;
6fbbdc16 1701
95cb9e10 1702 if (!dev->poll_mod_count) {
8b513d0c 1703 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
95cb9e10
WR		 1704 goto done;
1705 }
1706
b5193e5d 1707 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1708 queue_work(dev->wq, &dev->poll_work);
1709
b5193e5d
WR		 1710done:
1711 dev_kfree_skb(resp);
1712 return rc;
6fbbdc16
SO		 1713
1714stop_poll:
b5193e5d
WR		 1715 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1716
6fbbdc16
SO		 1717 pn533_poll_reset_mod_list(dev);
1718 dev->poll_protocols = 0;
b5193e5d 1719 return rc;
ad3823ce
SO		 1720}
1721
9e2d493e
WR		 1722static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1723 struct pn533_poll_modulations *mod)
c46ee386 1724{
b5193e5d 1725 struct sk_buff *skb;
c46ee386 1726
9e2d493e 1727 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1728 if (!skb)
1729 return NULL;
c46ee386 1730
b5193e5d 1731 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1732
b5193e5d 1733 return skb;
6fbbdc16 1734}
c46ee386 1735
6fbbdc16
SO		 1736static int pn533_send_poll_frame(struct pn533 *dev)
1737{
b5193e5d
WR		 1738 struct pn533_poll_modulations *mod;
1739 struct sk_buff *skb;
6fbbdc16 1740 int rc;
b5193e5d 1741 u8 cmd_code;
c46ee386 1742
b5193e5d 1743 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1744
b5193e5d
WR		 1745 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1746 __func__, mod->len);
c46ee386 1747
b5193e5d
WR		 1748 if (mod->len == 0) { /* Listen mode */
1749 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1750 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1751 } else { /* Polling mode */
1752 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1753 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1754 }
1755
1756 if (!skb) {
1757 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1758 return -ENOMEM;
1759 }
1760
1761 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1762 NULL);
1763 if (rc < 0) {
1764 dev_kfree_skb(skb);
6fbbdc16 1765 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1766 }
c46ee386 1767
6fbbdc16
SO		 1768 return rc;
1769}
1770
1771static void pn533_wq_poll(struct work_struct *work)
1772{
1773 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1774 struct pn533_poll_modulations *cur_mod;
1775 int rc;
1776
1777 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1778
1779 nfc_dev_dbg(&dev->interface->dev,
1780 "%s cancel_listen %d modulation len %d",
1781 __func__, dev->cancel_listen, cur_mod->len);
1782
1783 if (dev->cancel_listen == 1) {
1784 dev->cancel_listen = 0;
10cff29a 1785 pn533_abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1786 }
1787
6fbbdc16
SO		 1788 rc = pn533_send_poll_frame(dev);
1789 if (rc)
1790 return;
c46ee386 1791
6fbbdc16
SO		 1792 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1793 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1794
6fbbdc16 1795 return;
c46ee386
AAJ		 1796}
1797
fe7c5800
SO		 1798static int pn533_start_poll(struct nfc_dev *nfc_dev,
1799 u32 im_protocols, u32 tm_protocols)
1800{
1801 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1802
1803 nfc_dev_dbg(&dev->interface->dev,
1804 "%s: im protocols 0x%x tm protocols 0x%x",
1805 __func__, im_protocols, tm_protocols);
1806
1807 if (dev->tgt_active_prot) {
1808 nfc_dev_err(&dev->interface->dev,
1809 "Cannot poll with a target already activated");
1810 return -EBUSY;
1811 }
1812
51ad304c
SO		 1813 if (dev->tgt_mode) {
1814 nfc_dev_err(&dev->interface->dev,
1815 "Cannot poll while already being activated");
1816 return -EBUSY;
1817 }
1818
6fbbdc16
SO		 1819 if (tm_protocols) {
1820 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1821 if (dev->gb == NULL)
1822 tm_protocols = 0;
1823 }
ad3823ce 1824
6fbbdc16
SO		 1825 dev->poll_mod_curr = 0;
1826 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1827 dev->poll_protocols = im_protocols;
1828 dev->listen_protocols = tm_protocols;
ad3823ce 1829
6fbbdc16 1830 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1831}
1832
c46ee386
AAJ		 1833static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1834{
1835 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1836
1837 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1838
6fbbdc16
SO		 1839 del_timer(&dev->listen_timer);
1840
c46ee386 1841 if (!dev->poll_mod_count) {
6ca55372
WR		 1842 nfc_dev_dbg(&dev->interface->dev,
1843 "Polling operation was not running");
c46ee386
AAJ		 1844 return;
1845 }
1846
10cff29a 1847 pn533_abort_cmd(dev, GFP_KERNEL);
7c2a04a9 1848 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1849}
1850
1851static int pn533_activate_target_nfcdep(struct pn533 *dev)
1852{
cb950d93 1853 struct pn533_cmd_activate_response *rsp;
541d920b 1854 u16 gt_len;
c46ee386
AAJ		 1855 int rc;
1856
cb950d93
WR		 1857 struct sk_buff *skb;
1858 struct sk_buff *resp;
c46ee386 1859
cb950d93 1860 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1861
9e2d493e 1862 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1863 if (!skb)
1864 return -ENOMEM;
c46ee386 1865
cb950d93
WR		 1866 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1867 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1868
cb950d93
WR		 1869 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1870 if (IS_ERR(resp))
1871 return PTR_ERR(resp);
c46ee386 1872
37cf4fc6 1873 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1874 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1875 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1876 nfc_dev_err(&dev->interface->dev,
1877 "Target activation failed (error 0x%x)", rc);
cb950d93 1878 dev_kfree_skb(resp);
c46ee386 1879 return -EIO;
8a0ecfe7 1880 }
c46ee386 1881
541d920b 1882 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1883 gt_len = resp->len - 16;
1884 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1885
cb950d93 1886 dev_kfree_skb(resp);
541d920b 1887 return rc;
c46ee386
AAJ		 1888}
1889
90099433
EL		 1890static int pn533_activate_target(struct nfc_dev *nfc_dev,
1891 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1892{
1893 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1894 int rc;
1895
1896 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1897 protocol);
c46ee386
AAJ		 1898
1899 if (dev->poll_mod_count) {
6ca55372
WR		 1900 nfc_dev_err(&dev->interface->dev,
1901 "Cannot activate while polling");
c46ee386
AAJ		 1902 return -EBUSY;
1903 }
1904
1905 if (dev->tgt_active_prot) {
6ca55372
WR		 1906 nfc_dev_err(&dev->interface->dev,
1907 "There is already an active target");
c46ee386
AAJ		 1908 return -EBUSY;
1909 }
1910
1911 if (!dev->tgt_available_prots) {
6ca55372
WR		 1912 nfc_dev_err(&dev->interface->dev,
1913 "There is no available target to activate");
c46ee386
AAJ		 1914 return -EINVAL;
1915 }
1916
1917 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1918 nfc_dev_err(&dev->interface->dev,
1919 "Target doesn't support requested proto %u",
1920 protocol);
c46ee386
AAJ		 1921 return -EINVAL;
1922 }
1923
1924 if (protocol == NFC_PROTO_NFC_DEP) {
1925 rc = pn533_activate_target_nfcdep(dev);
1926 if (rc) {
6ca55372
WR		 1927 nfc_dev_err(&dev->interface->dev,
1928 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1929 return rc;
1930 }
1931 }
1932
1933 dev->tgt_active_prot = protocol;
1934 dev->tgt_available_prots = 0;
1935
1936 return 0;
1937}
1938
90099433
EL		 1939static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1940 struct nfc_target *target)
c46ee386
AAJ		 1941{
1942 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1943
1944 struct sk_buff *skb;
1945 struct sk_buff *resp;
1946
c46ee386
AAJ		 1947 int rc;
1948
1949 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1950
1951 if (!dev->tgt_active_prot) {
1952 nfc_dev_err(&dev->interface->dev, "There is no active target");
1953 return;
1954 }
1955
1956 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1957 skb_queue_purge(&dev->resp_q);
1958
9e2d493e 1959 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1960 if (!skb)
1961 return;
c46ee386 1962
cb950d93 1963 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1964
cb950d93
WR		 1965 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1966 if (IS_ERR(resp))
c46ee386 1967 return;
c46ee386 1968
cb950d93 1969 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1970 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1971 nfc_dev_err(&dev->interface->dev,
1972 "Error 0x%x when releasing the target", rc);
c46ee386 1973
cb950d93 1974 dev_kfree_skb(resp);
c46ee386
AAJ		 1975 return;
1976}
1977
361f3cb7
SO		 1978
1979static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1980 struct sk_buff *resp)
361f3cb7 1981{
13003649 1982 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1983 u8 target_gt_len;
1984 int rc;
13003649 1985 u8 active = *(u8 *)arg;
70418e6e
WR		 1986
1987 kfree(arg);
361f3cb7 1988
13003649
WR		 1989 if (IS_ERR(resp))
1990 return PTR_ERR(resp);
361f3cb7
SO		 1991
1992 if (dev->tgt_available_prots &&
1993 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1994 nfc_dev_err(&dev->interface->dev,
5d467742 1995 "The target does not support DEP");
13003649
WR		 1996 rc = -EINVAL;
1997 goto error;
361f3cb7
SO		 1998 }
1999
13003649
WR		 2000 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2001
2002 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 2003 if (rc != PN533_CMD_RET_SUCCESS) {
2004 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2005 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 2006 goto error;
361f3cb7
SO		 2007 }
2008
2009 if (!dev->tgt_available_prots) {
13003649
WR		 2010 struct nfc_target nfc_target;
2011
361f3cb7
SO		 2012 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2013
2014 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 2015 nfc_target.nfcid1_len = 10;
13003649 2016 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 2017 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2018 if (rc)
13003649 2019 goto error;
361f3cb7
SO		 2020
2021 dev->tgt_available_prots = 0;
2022 }
2023
2024 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2025
2026 /* ATR_RES general bytes are located at offset 17 */
13003649 2027 target_gt_len = resp->len - 17;
361f3cb7 2028 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 2029 rsp->gt, target_gt_len);
361f3cb7
SO		 2030 if (rc == 0)
2031 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 2032 dev->nfc_dev->targets[0].idx,
2033 !active, NFC_RF_INITIATOR);
361f3cb7 2034
13003649
WR		 2035error:
2036 dev_kfree_skb(resp);
2037 return rc;
361f3cb7
SO		 2038}
2039
41a8ec49
SO		 2040static int pn533_mod_to_baud(struct pn533 *dev)
2041{
2042 switch (dev->poll_mod_curr) {
2043 case PN533_POLL_MOD_106KBPS_A:
2044 return 0;
2045 case PN533_POLL_MOD_212KBPS_FELICA:
2046 return 1;
2047 case PN533_POLL_MOD_424KBPS_FELICA:
2048 return 2;
2049 default:
2050 return -EINVAL;
2051 }
2052}
2053
d7f3345d 2054#define PASSIVE_DATA_LEN 5
90099433 2055static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 2056 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 2057{
2058 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 2059 struct sk_buff *skb;
2060 int rc, baud, skb_len;
2061 u8 *next, *arg;
2062
d7f3345d 2063 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 2064
2065 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2066
361f3cb7
SO		 2067 if (dev->poll_mod_count) {
2068 nfc_dev_err(&dev->interface->dev,
5d467742 2069 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 2070 return -EBUSY;
2071 }
2072
2073 if (dev->tgt_active_prot) {
2074 nfc_dev_err(&dev->interface->dev,
5d467742 2075 "There is already an active target");
361f3cb7
SO		 2076 return -EBUSY;
2077 }
2078
41a8ec49
SO		 2079 baud = pn533_mod_to_baud(dev);
2080 if (baud < 0) {
2081 nfc_dev_err(&dev->interface->dev,
2082 "Invalid curr modulation %d", dev->poll_mod_curr);
2083 return baud;
2084 }
2085
13003649 2086 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 2087 if (comm_mode == NFC_COMM_PASSIVE)
13003649 2088 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2089
322bce95
SO		 2090 if (target && target->nfcid2_len)
2091 skb_len += NFC_NFCID3_MAXSIZE;
2092
9e2d493e 2093 skb = pn533_alloc_skb(dev, skb_len);
13003649 2094 if (!skb)
361f3cb7
SO		 2095 return -ENOMEM;
2096
13003649
WR		 2097 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2098 *skb_put(skb, 1) = baud; /* Baud rate */
2099
2100 next = skb_put(skb, 1); /* Next */
2101 *next = 0;
361f3cb7 2102
13003649
WR		 2103 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2104 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2105 PASSIVE_DATA_LEN);
2106 *next |= 1;
d7f3345d
SO		 2107 }
2108
322bce95
SO		 2109 if (target && target->nfcid2_len) {
2110 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2111 target->nfcid2_len);
2112 *next |= 2;
2113 }
2114
47807d3d 2115 if (gb != NULL && gb_len > 0) {
13003649
WR		 2116 memcpy(skb_put(skb, gb_len), gb, gb_len);
2117 *next |= 4; /* We have some Gi */
361f3cb7 2118 } else {
13003649 2119 *next = 0;
361f3cb7
SO		 2120 }
2121
13003649
WR		 2122 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2123 if (!arg) {
2124 dev_kfree_skb(skb);
2125 return -ENOMEM;
2126 }
361f3cb7 2127
13003649 2128 *arg = !comm_mode;
361f3cb7 2129
13003649
WR		 2130 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2131 pn533_in_dep_link_up_complete, arg);
2132
2133 if (rc < 0) {
2134 dev_kfree_skb(skb);
2135 kfree(arg);
2136 }
361f3cb7
SO		 2137
2138 return rc;
2139}
2140
2141static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2142{
6fbbdc16
SO		 2143 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2144
fcfafc76
WR		 2145 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2146
6fbbdc16
SO		 2147 pn533_poll_reset_mod_list(dev);
2148
10cff29a
WR		 2149 if (dev->tgt_mode || dev->tgt_active_prot)
2150 pn533_abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 2151
2152 dev->tgt_active_prot = 0;
2153 dev->tgt_mode = 0;
2154
2155 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2156
2157 return 0;
2158}
2159
c46ee386 2160struct pn533_data_exchange_arg {
c46ee386
AAJ		 2161 data_exchange_cb_t cb;
2162 void *cb_context;
2163};
2164
6ff73fd2
SO		 2165static struct sk_buff *pn533_build_response(struct pn533 *dev)
2166{
2167 struct sk_buff *skb, *tmp, *t;
2168 unsigned int skb_len = 0, tmp_len = 0;
2169
fcfafc76 2170 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2171
2172 if (skb_queue_empty(&dev->resp_q))
2173 return NULL;
2174
2175 if (skb_queue_len(&dev->resp_q) == 1) {
2176 skb = skb_dequeue(&dev->resp_q);
2177 goto out;
2178 }
2179
2180 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2181 skb_len += tmp->len;
2182
2183 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2184 __func__, skb_len);
2185
2186 skb = alloc_skb(skb_len, GFP_KERNEL);
2187 if (skb == NULL)
2188 goto out;
2189
2190 skb_put(skb, skb_len);
2191
2192 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2193 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2194 tmp_len += tmp->len;
2195 }
2196
2197out:
2198 skb_queue_purge(&dev->resp_q);
2199
2200 return skb;
2201}
2202
c46ee386 2203static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2204 struct sk_buff *resp)
c46ee386
AAJ		 2205{
2206 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2207 struct sk_buff *skb;
2208 int rc = 0;
2209 u8 status, ret, mi;
c46ee386
AAJ		 2210
2211 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2212
b1e666f5
WR		 2213 if (IS_ERR(resp)) {
2214 rc = PTR_ERR(resp);
2215 goto _error;
c46ee386
AAJ		 2216 }
2217
b1e666f5
WR		 2218 status = resp->data[0];
2219 ret = status & PN533_CMD_RET_MASK;
2220 mi = status & PN533_CMD_MI_MASK;
2221
2222 skb_pull(resp, sizeof(status));
c46ee386 2223
b1e666f5
WR		 2224 if (ret != PN533_CMD_RET_SUCCESS) {
2225 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2226 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2227 rc = -EIO;
c46ee386
AAJ		 2228 goto error;
2229 }
2230
b1e666f5 2231 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2232
b1e666f5
WR		 2233 if (mi) {
2234 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2235 queue_work(dev->wq, &dev->mi_work);
2236 return -EINPROGRESS;
c46ee386
AAJ		 2237 }
2238
6ff73fd2 2239 skb = pn533_build_response(dev);
b1e666f5 2240 if (!skb)
6ff73fd2 2241 goto error;
c46ee386 2242
6ff73fd2 2243 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2244 kfree(arg);
2245 return 0;
2246
2247error:
b1e666f5
WR		 2248 dev_kfree_skb(resp);
2249_error:
6ff73fd2 2250 skb_queue_purge(&dev->resp_q);
b1e666f5 2251 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2252 kfree(arg);
b1e666f5 2253 return rc;
c46ee386
AAJ		 2254}
2255
be9ae4ce
SO		 2256static int pn533_transceive(struct nfc_dev *nfc_dev,
2257 struct nfc_target *target, struct sk_buff *skb,
2258 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2259{
2260 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2261 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2262 int rc;
2263
2264 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2265
b1e666f5
WR		 2266 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2267 /* TODO: Implement support to multi-part data exchange */
2268 nfc_dev_err(&dev->interface->dev,
2269 "Data length greater than the max allowed: %d",
2270 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2271 rc = -ENOSYS;
2272 goto error;
2273 }
2274
c46ee386 2275 if (!dev->tgt_active_prot) {
6ca55372
WR		 2276 nfc_dev_err(&dev->interface->dev,
2277 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2278 rc = -EINVAL;
2279 goto error;
2280 }
2281
b1e666f5 2282 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2283 if (!arg) {
2284 rc = -ENOMEM;
b1e666f5 2285 goto error;
c46ee386
AAJ		 2286 }
2287
c46ee386
AAJ		 2288 arg->cb = cb;
2289 arg->cb_context = cb_context;
2290
b1e666f5
WR		 2291 switch (dev->device_type) {
2292 case PN533_DEVICE_PASORI:
2293 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2294 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2295 skb,
2296 pn533_data_exchange_complete,
2297 arg);
2298
2299 break;
2300 }
2301 default:
2302 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2303
2304 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2305 skb, pn533_data_exchange_complete,
2306 arg);
2307
2308 break;
c46ee386
AAJ		 2309 }
2310
b1e666f5
WR		 2311 if (rc < 0) /* rc from send_async */
2312 goto error;
2313
c46ee386
AAJ		 2314 return 0;
2315
c46ee386 2316error:
b1e666f5
WR		 2317 kfree(arg);
2318 dev_kfree_skb(skb);
c46ee386
AAJ		 2319 return rc;
2320}
2321
dadb06f2 2322static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2323 struct sk_buff *resp)
dadb06f2 2324{
e4878823 2325 u8 status;
5b412fd1 2326
dadb06f2
SO		 2327 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2328
e4878823
WR		 2329 if (IS_ERR(resp))
2330 return PTR_ERR(resp);
5b412fd1 2331
e4878823 2332 status = resp->data[0];
dadb06f2 2333
e4878823 2334 dev_kfree_skb(resp);
dadb06f2 2335
e4878823 2336 if (status != 0) {
dadb06f2
SO		 2337 nfc_tm_deactivated(dev->nfc_dev);
2338
51ad304c
SO		 2339 dev->tgt_mode = 0;
2340
dadb06f2
SO		 2341 return 0;
2342 }
2343
2344 queue_work(dev->wq, &dev->tg_work);
2345
2346 return 0;
2347}
2348
2349static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2350{
2351 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2352 int rc;
2353
2354 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2355
e4878823 2356 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2357 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2358 "Data length greater than the max allowed: %d",
2359 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2360 return -ENOSYS;
dadb06f2
SO		 2361 }
2362
e4878823
WR		 2363 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2364 pn533_tm_send_complete, NULL);
2365 if (rc < 0)
2366 dev_kfree_skb(skb);
dadb06f2
SO		 2367
2368 return rc;
2369}
2370
6ff73fd2
SO		 2371static void pn533_wq_mi_recv(struct work_struct *work)
2372{
2373 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2374
2375 struct sk_buff *skb;
6ff73fd2
SO		 2376 int rc;
2377
2378 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2379
9e2d493e 2380 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2381 if (!skb)
2382 goto error;
6ff73fd2 2383
b1e666f5
WR		 2384 switch (dev->device_type) {
2385 case PN533_DEVICE_PASORI:
2386 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2387 rc = pn533_send_cmd_direct_async(dev,
2388 PN533_CMD_IN_COMM_THRU,
2389 skb,
2390 pn533_data_exchange_complete,
2391 dev->cmd_complete_mi_arg);
6ff73fd2 2392
b1e666f5
WR		 2393 break;
2394 }
2395 default:
2396 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2397
b1e666f5
WR		 2398 rc = pn533_send_cmd_direct_async(dev,
2399 PN533_CMD_IN_DATA_EXCHANGE,
2400 skb,
2401 pn533_data_exchange_complete,
2402 dev->cmd_complete_mi_arg);
b1bb290a 2403
b1e666f5 2404 break;
6ff73fd2
SO		 2405 }
2406
b1e666f5 2407 if (rc == 0) /* success */
6ff73fd2
SO		 2408 return;
2409
b1e666f5
WR		 2410 nfc_dev_err(&dev->interface->dev,
2411 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2412
b1e666f5 2413 dev_kfree_skb(skb);
140ef7f6 2414 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2415
b1e666f5 2416error:
6ff73fd2 2417 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2418 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2419}
2420
c46ee386
AAJ		 2421static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2422 u8 cfgdata_len)
2423{
cb950d93
WR		 2424 struct sk_buff *skb;
2425 struct sk_buff *resp;
2426
2427 int skb_len;
c46ee386
AAJ		 2428
2429 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2430
cb950d93 2431 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2432
9e2d493e 2433 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2434 if (!skb)
2435 return -ENOMEM;
c46ee386 2436
cb950d93
WR		 2437 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2438 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2439
cb950d93
WR		 2440 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2441 if (IS_ERR(resp))
2442 return PTR_ERR(resp);
c46ee386 2443
cb950d93
WR		 2444 dev_kfree_skb(resp);
2445 return 0;
2446}
2447
2448static int pn533_get_firmware_version(struct pn533 *dev,
2449 struct pn533_fw_version *fv)
2450{
2451 struct sk_buff *skb;
2452 struct sk_buff *resp;
2453
9e2d493e 2454 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2455 if (!skb)
2456 return -ENOMEM;
2457
2458 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2459 if (IS_ERR(resp))
2460 return PTR_ERR(resp);
2461
2462 fv->ic = resp->data[0];
2463 fv->ver = resp->data[1];
2464 fv->rev = resp->data[2];
2465 fv->support = resp->data[3];
2466
2467 dev_kfree_skb(resp);
2468 return 0;
c46ee386
AAJ		 2469}
2470
f75c2913 2471static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2472{
cb950d93
WR		 2473 struct sk_buff *skb;
2474 struct sk_buff *resp;
5c7b0531
SO		 2475
2476 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2477
9e2d493e 2478 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2479 if (!skb)
2480 return -ENOMEM;
5c7b0531 2481
cb950d93 2482 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2483
cb950d93
WR		 2484 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2485 if (IS_ERR(resp))
2486 return PTR_ERR(resp);
5c7b0531 2487
cb950d93 2488 dev_kfree_skb(resp);
5c7b0531 2489
94c5c156 2490 return 0;
5c7b0531
SO		 2491}
2492
53cf4839
WR		 2493struct pn533_acr122_poweron_rdr_arg {
2494 int rc;
2495 struct completion done;
2496};
2497
2498static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2499{
2500 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2501
2502 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2503
86eca4e7 2504 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2505 urb->transfer_buffer, urb->transfer_buffer_length,
2506 false);
2507
2508 arg->rc = urb->status;
2509 complete(&arg->done);
2510}
2511
2512static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2513{
2514 /* Power on th reader (CCID cmd) */
2515 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2516 0, 0, 0, 0, 0, 0, 3, 0, 0};
2517 u8 buf[255];
2518 int rc;
2519 void *cntx;
2520 struct pn533_acr122_poweron_rdr_arg arg;
2521
2522 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2523
2524 init_completion(&arg.done);
2525 cntx = dev->in_urb->context; /* backup context */
2526
2527 dev->in_urb->transfer_buffer = buf;
2528 dev->in_urb->transfer_buffer_length = 255;
2529 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2530 dev->in_urb->context = &arg;
2531
2532 dev->out_urb->transfer_buffer = cmd;
2533 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2534
86eca4e7 2535 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2536 cmd, sizeof(cmd), false);
2537
2538 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2539 if (rc) {
2540 nfc_dev_err(&dev->interface->dev,
2541 "Reader power on cmd error %d", rc);
2542 return rc;
2543 }
2544
2545 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2546 if (rc) {
2547 nfc_dev_err(&dev->interface->dev,
2548 "Can't submit for reader power on cmd response %d",
2549 rc);
2550 return rc;
2551 }
2552
2553 wait_for_completion(&arg.done);
2554 dev->in_urb->context = cntx; /* restore context */
2555
2556 return arg.rc;
2557}
2558
60d9edd5
SO		 2559static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2560{
2561 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2562 u8 rf_field = !!rf;
2563 int rc;
2564
2565 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2566 (u8 *)&rf_field, 1);
2567 if (rc) {
2568 nfc_dev_err(&dev->interface->dev,
2569 "Error on setting RF field");
2570 return rc;
2571 }
2572
2573 return rc;
2574}
2575
2576int pn533_dev_up(struct nfc_dev *nfc_dev)
2577{
2578 return pn533_rf_field(nfc_dev, 1);
2579}
2580
2581int pn533_dev_down(struct nfc_dev *nfc_dev)
2582{
2583 return pn533_rf_field(nfc_dev, 0);
2584}
2585
5c7b0531 2586static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2587 .dev_up = pn533_dev_up,
2588 .dev_down = pn533_dev_down,
361f3cb7
SO		 2589 .dep_link_up = pn533_dep_link_up,
2590 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2591 .start_poll = pn533_start_poll,
2592 .stop_poll = pn533_stop_poll,
2593 .activate_target = pn533_activate_target,
2594 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2595 .im_transceive = pn533_transceive,
dadb06f2 2596 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2597};
2598
5c7b0531
SO		 2599static int pn533_setup(struct pn533 *dev)
2600{
2601 struct pn533_config_max_retries max_retries;
2602 struct pn533_config_timing timing;
2603 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2604 int rc;
2605
2606 switch (dev->device_type) {
2607 case PN533_DEVICE_STD:
5c7b0531 2608 case PN533_DEVICE_PASORI:
53cf4839 2609 case PN533_DEVICE_ACR122U:
5c7b0531
SO		 2610 max_retries.mx_rty_atr = 0x2;
2611 max_retries.mx_rty_psl = 0x1;
2612 max_retries.mx_rty_passive_act =
2613 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2614
2615 timing.rfu = PN533_CONFIG_TIMING_102;
2616 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2617 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2618
2619 break;
2620
2621 default:
2622 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2623 dev->device_type);
2624 return -EINVAL;
2625 }
2626
2627 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2628 (u8 *)&max_retries, sizeof(max_retries));
2629 if (rc) {
2630 nfc_dev_err(&dev->interface->dev,
2631 "Error on setting MAX_RETRIES config");
2632 return rc;
2633 }
2634
2635
2636 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2637 (u8 *)&timing, sizeof(timing));
2638 if (rc) {
2639 nfc_dev_err(&dev->interface->dev,
2640 "Error on setting RF timings");
2641 return rc;
2642 }
2643
2644 switch (dev->device_type) {
2645 case PN533_DEVICE_STD:
2646 break;
2647
2648 case PN533_DEVICE_PASORI:
f75c2913 2649 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2650
2651 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2652 pasori_cfg, 3);
2653 if (rc) {
2654 nfc_dev_err(&dev->interface->dev,
2655 "Error while settings PASORI config");
2656 return rc;
2657 }
2658
f75c2913 2659 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2660
2661 break;
2662 }
2663
2664 return 0;
2665}
2666
c46ee386
AAJ		 2667static int pn533_probe(struct usb_interface *interface,
2668 const struct usb_device_id *id)
2669{
cb950d93 2670 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2671 struct pn533 *dev;
2672 struct usb_host_interface *iface_desc;
2673 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2674 int in_endpoint = 0;
2675 int out_endpoint = 0;
2676 int rc = -ENOMEM;
2677 int i;
2678 u32 protocols;
2679
2680 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2681 if (!dev)
2682 return -ENOMEM;
2683
2684 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2685 dev->interface = interface;
0201ed03 2686 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2687
2688 iface_desc = interface->cur_altsetting;
2689 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2690 endpoint = &iface_desc->endpoint[i].desc;
2691
8d25ca79 2692 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2693 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2694
8d25ca79 2695 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2696 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2697 }
2698
2699 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2700 nfc_dev_err(&interface->dev,
2701 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2702 rc = -ENODEV;
2703 goto error;
2704 }
2705
c46ee386 2706 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2707 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2708
a5798094 2709 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2710 goto error;
2711
2712 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2713 usb_rcvbulkpipe(dev->udev, in_endpoint),
2714 NULL, 0, NULL, dev);
c46ee386 2715 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2716 usb_sndbulkpipe(dev->udev, out_endpoint),
2717 NULL, 0, pn533_send_complete, dev);
c46ee386 2718
5d50b364
SO		 2719 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2720 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2721 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2722 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2723 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2724 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2725 if (dev->wq == NULL)
2726 goto error;
c46ee386 2727
6fbbdc16
SO		 2728 init_timer(&dev->listen_timer);
2729 dev->listen_timer.data = (unsigned long) dev;
2730 dev->listen_timer.function = pn533_listen_mode_timer;
2731
6ff73fd2
SO		 2732 skb_queue_head_init(&dev->resp_q);
2733
5d50b364
SO		 2734 INIT_LIST_HEAD(&dev->cmd_queue);
2735
c46ee386
AAJ		 2736 usb_set_intfdata(interface, dev);
2737
9e2d493e 2738 dev->ops = &pn533_std_frame_ops;
c46ee386 2739
58520373 2740 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
5c7b0531
SO		 2741 dev->device_type = id->driver_info;
2742 switch (dev->device_type) {
2743 case PN533_DEVICE_STD:
2744 protocols = PN533_ALL_PROTOCOLS;
2745 break;
2746
2747 case PN533_DEVICE_PASORI:
2748 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2749 break;
2750
53cf4839
WR		 2751 case PN533_DEVICE_ACR122U:
2752 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2753 dev->ops = &pn533_acr122_frame_ops;
2754 dev->protocol_type = PN533_PROTO_REQ_RESP,
2755
2756 rc = pn533_acr122_poweron_rdr(dev);
2757 if (rc < 0) {
2758 nfc_dev_err(&dev->interface->dev,
2759 "Couldn't poweron the reader (error %d)",
2760 rc);
2761 goto destroy_wq;
2762 }
2763 break;
2764
5c7b0531
SO		 2765 default:
2766 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2767 dev->device_type);
2768 rc = -EINVAL;
2769 goto destroy_wq;
2770 }
c46ee386 2771
9e2d493e
WR		 2772 memset(&fw_ver, 0, sizeof(fw_ver));
2773 rc = pn533_get_firmware_version(dev, &fw_ver);
2774 if (rc < 0)
2775 goto destroy_wq;
2776
2777 nfc_dev_info(&dev->interface->dev,
86eca4e7
OG		 2778 "NXP PN5%02X firmware ver %d.%d now attached",
2779 fw_ver.ic, fw_ver.ver, fw_ver.rev);
9e2d493e
WR		 2780
2781
e8753043 2782 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
9e2d493e 2783 dev->ops->tx_header_len +
e8753043 2784 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2785 dev->ops->tx_tail_len);
4674d0fe
WY		 2786 if (!dev->nfc_dev) {
2787 rc = -ENOMEM;
4849f85e 2788 goto destroy_wq;
4674d0fe 2789 }
c46ee386
AAJ		 2790
2791 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2792 nfc_set_drvdata(dev->nfc_dev, dev);
2793
2794 rc = nfc_register_device(dev->nfc_dev);
2795 if (rc)
2796 goto free_nfc_dev;
2797
5c7b0531
SO		 2798 rc = pn533_setup(dev);
2799 if (rc)
34a85bfc 2800 goto unregister_nfc_dev;
34a85bfc 2801
c46ee386
AAJ		 2802 return 0;
2803
9f2f8ba1
SO		 2804unregister_nfc_dev:
2805 nfc_unregister_device(dev->nfc_dev);
2806
c46ee386
AAJ		 2807free_nfc_dev:
2808 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2809
4849f85e
SO		 2810destroy_wq:
2811 destroy_workqueue(dev->wq);
c46ee386 2812error:
c46ee386 2813 usb_free_urb(dev->in_urb);
c46ee386 2814 usb_free_urb(dev->out_urb);
7c5a54fb 2815 usb_put_dev(dev->udev);
c46ee386
AAJ		 2816 kfree(dev);
2817 return rc;
2818}
2819
2820static void pn533_disconnect(struct usb_interface *interface)
2821{
2822 struct pn533 *dev;
5d50b364 2823 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2824
2825 dev = usb_get_intfdata(interface);
2826 usb_set_intfdata(interface, NULL);
2827
2828 nfc_unregister_device(dev->nfc_dev);
2829 nfc_free_device(dev->nfc_dev);
2830
2831 usb_kill_urb(dev->in_urb);
2832 usb_kill_urb(dev->out_urb);
2833
4849f85e 2834 destroy_workqueue(dev->wq);
c46ee386 2835
6ff73fd2
SO		 2836 skb_queue_purge(&dev->resp_q);
2837
6fbbdc16
SO		 2838 del_timer(&dev->listen_timer);
2839
5d50b364
SO		 2840 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2841 list_del(&cmd->queue);
2842 kfree(cmd);
2843 }
2844
c46ee386 2845 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2846 usb_free_urb(dev->out_urb);
2847 kfree(dev);
2848
276556db 2849 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2850}
2851
2852static struct usb_driver pn533_driver = {
2853 .name = "pn533",
2854 .probe = pn533_probe,
2855 .disconnect = pn533_disconnect,
2856 .id_table = pn533_table,
2857};
2858
fe748483 2859module_usb_driver(pn533_driver);
c46ee386 2860
e70b96e9
WR		 2861MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2862MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2863MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2864MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2865MODULE_VERSION(VERSION);
2866MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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