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Merge tag 'fcoe' into fixes
[linux-2.6-block.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,
261 .tsn = 0,
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,
274 .tsn = 0,
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;
1238 u8 nfcid2[8];
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
c46ee386
AAJ		 1278 return 0;
1279}
1280
1281struct pn533_target_jewel {
1282 __be16 sens_res;
1283 u8 jewelid[4];
1284} __packed;
1285
1286static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1287 int target_data_len)
1288{
1289 u8 ssd;
1290 u8 platconf;
1291
1292 if (target_data_len < sizeof(struct pn533_target_jewel))
1293 return false;
1294
1295 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1296 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1297 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1298
1299 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1300 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1301 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1302 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1303 return false;
1304
1305 return true;
1306}
1307
1308static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1309 int tgt_data_len)
1310{
1311 struct pn533_target_jewel *tgt_jewel;
1312
37cf4fc6 1313 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1314
1315 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1316 return -EPROTO;
1317
1318 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1319 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1320 nfc_tgt->nfcid1_len = 4;
1321 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1322
1323 return 0;
1324}
1325
1326struct pn533_type_b_prot_info {
1327 u8 bitrate;
1328 u8 fsci_type;
1329 u8 fwi_adc_fo;
1330} __packed;
1331
1332#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1333#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1334#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1335
1336struct pn533_type_b_sens_res {
1337 u8 opcode;
1338 u8 nfcid[4];
1339 u8 appdata[4];
1340 struct pn533_type_b_prot_info prot_info;
1341} __packed;
1342
1343#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1344
1345struct pn533_target_type_b {
1346 struct pn533_type_b_sens_res sensb_res;
1347 u8 attrib_res_len;
1348 u8 attrib_res[];
1349} __packed;
1350
1351static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1352 int target_data_len)
1353{
1354 if (target_data_len < sizeof(struct pn533_target_type_b))
1355 return false;
1356
1357 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1358 return false;
1359
1360 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1361 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1362 return false;
1363
1364 return true;
1365}
1366
1367static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1368 int tgt_data_len)
1369{
1370 struct pn533_target_type_b *tgt_type_b;
1371
37cf4fc6 1372 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1373
1374 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1375 return -EPROTO;
1376
01d719a2 1377 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1378
1379 return 0;
1380}
1381
b5193e5d
WR		 1382static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1383 int tgdata_len)
c46ee386 1384{
c46ee386
AAJ		 1385 struct nfc_target nfc_tgt;
1386 int rc;
1387
1388 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1389 dev->poll_mod_curr);
c46ee386 1390
b5193e5d 1391 if (tg != 1)
c46ee386
AAJ		 1392 return -EPROTO;
1393
98b3ac1b
SO		 1394 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1395
c46ee386
AAJ		 1396 switch (dev->poll_mod_curr) {
1397 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1398 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1399 break;
1400 case PN533_POLL_MOD_212KBPS_FELICA:
1401 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1402 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1403 break;
1404 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1405 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1406 break;
1407 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1408 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1409 break;
1410 default:
b5193e5d
WR		 1411 nfc_dev_err(&dev->interface->dev,
1412 "Unknown current poll modulation");
c46ee386
AAJ		 1413 return -EPROTO;
1414 }
1415
1416 if (rc)
1417 return rc;
1418
1419 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1420 nfc_dev_dbg(&dev->interface->dev,
1421 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1422 return -EAGAIN;
1423 }
1424
b5193e5d
WR		 1425 nfc_dev_dbg(&dev->interface->dev,
1426 "Target found - supported protocols: 0x%x",
1427 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1428
1429 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1430
1431 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1432
1433 return 0;
1434}
1435
6fbbdc16
SO		 1436static inline void pn533_poll_next_mod(struct pn533 *dev)
1437{
1438 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1439}
1440
c46ee386
AAJ		 1441static void pn533_poll_reset_mod_list(struct pn533 *dev)
1442{
1443 dev->poll_mod_count = 0;
1444}
1445
1446static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1447{
1448 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1449 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1450 dev->poll_mod_count++;
1451}
1452
6fbbdc16
SO		 1453static void pn533_poll_create_mod_list(struct pn533 *dev,
1454 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1455{
1456 pn533_poll_reset_mod_list(dev);
1457
b08e8603
WR		 1458 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1459 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1460 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1461 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1462
b08e8603
WR		 1463 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1464 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1465 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1466 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1467 }
1468
6fbbdc16 1469 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1470 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1471
01d719a2 1472 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1473 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1474
6fbbdc16
SO		 1475 if (tm_protocols)
1476 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1477}
1478
b5193e5d 1479static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1480{
b5193e5d
WR		 1481 u8 nbtg, tg, *tgdata;
1482 int rc, tgdata_len;
c46ee386
AAJ		 1483
1484 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1485
b5193e5d
WR		 1486 nbtg = resp->data[0];
1487 tg = resp->data[1];
1488 tgdata = &resp->data[2];
1489 tgdata_len = resp->len - 2; /* nbtg + tg */
1490
1491 if (nbtg) {
1492 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1493
1494 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1495 if (rc == 0) {
1496 pn533_poll_reset_mod_list(dev);
1497 return 0;
1498 }
c46ee386
AAJ		 1499 }
1500
6fbbdc16 1501 return -EAGAIN;
c46ee386
AAJ		 1502}
1503
9e2d493e 1504static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1505{
b5193e5d
WR		 1506 struct sk_buff *skb;
1507 u8 *felica, *nfcid3, *gb;
1508
9e2d493e
WR		 1509 u8 *gbytes = dev->gb;
1510 size_t gbytes_len = dev->gb_len;
1511
51d9e803
SO		 1512 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1513 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1514 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1515 0xff, 0xff}; /* System code */
b5193e5d 1516
51d9e803
SO		 1517 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1518 0x0, 0x0, 0x0,
1519 0x40}; /* SEL_RES for DEP */
ad3823ce 1520
b5193e5d
WR		 1521 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1522 felica (18), nfcid3 (10), gb_len (1) */
1523 gbytes_len +
1524 1; /* len Tk*/
ad3823ce 1525
9e2d493e 1526 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1527 if (!skb)
1528 return NULL;
ad3823ce
SO		 1529
1530 /* DEP support only */
52f2eaee 1531 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1532
1533 /* MIFARE params */
1534 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1535
1536 /* Felica params */
b5193e5d
WR		 1537 felica = skb_put(skb, 18);
1538 memcpy(felica, felica_params, 18);
1539 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1540
1541 /* NFCID3 */
b5193e5d
WR		 1542 nfcid3 = skb_put(skb, 10);
1543 memset(nfcid3, 0, 10);
1544 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1545
1546 /* General bytes */
b5193e5d 1547 *skb_put(skb, 1) = gbytes_len;
51d9e803 1548
b5193e5d
WR		 1549 gb = skb_put(skb, gbytes_len);
1550 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1551
b5193e5d
WR		 1552 /* Len Tk */
1553 *skb_put(skb, 1) = 0;
51d9e803 1554
b5193e5d 1555 return skb;
ad3823ce
SO		 1556}
1557
b1bb290a 1558#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1559#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1560static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1561 struct sk_buff *resp)
103b34cf 1562{
e4878823 1563 u8 status;
103b34cf
SO		 1564
1565 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1566
e4878823
WR		 1567 if (IS_ERR(resp))
1568 return PTR_ERR(resp);
103b34cf 1569
e4878823
WR		 1570 status = resp->data[0];
1571 skb_pull(resp, sizeof(status));
103b34cf 1572
e4878823 1573 if (status != 0) {
103b34cf 1574 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1575 dev->tgt_mode = 0;
e4878823 1576 dev_kfree_skb(resp);
103b34cf
SO		 1577 return 0;
1578 }
1579
e4878823 1580 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1581}
1582
1583static void pn533_wq_tg_get_data(struct work_struct *work)
1584{
1585 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1586
e4878823
WR		 1587 struct sk_buff *skb;
1588 int rc;
103b34cf 1589
e4878823 1590 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1591
9e2d493e 1592 skb = pn533_alloc_skb(dev, 0);
e4878823 1593 if (!skb)
103b34cf
SO		 1594 return;
1595
e4878823
WR		 1596 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1597 pn533_tm_get_data_complete, NULL);
103b34cf 1598
e4878823
WR		 1599 if (rc < 0)
1600 dev_kfree_skb(skb);
103b34cf
SO		 1601
1602 return;
1603}
1604
fc40a8c1 1605#define ATR_REQ_GB_OFFSET 17
b5193e5d 1606static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1607{
b5193e5d 1608 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1609 size_t gb_len;
103b34cf 1610 int rc;
ad3823ce
SO		 1611
1612 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1613
b5193e5d 1614 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1615 return -EINVAL;
1616
b5193e5d
WR		 1617 mode = resp->data[0];
1618 cmd = &resp->data[1];
ad3823ce 1619
b5193e5d
WR		 1620 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1621 mode, resp->len);
ad3823ce 1622
b5193e5d
WR		 1623 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1624 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1625 comm_mode = NFC_COMM_ACTIVE;
1626
b5193e5d 1627 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1628 return -EOPNOTSUPP;
1629
b5193e5d
WR		 1630 gb = cmd + ATR_REQ_GB_OFFSET;
1631 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1632
103b34cf
SO		 1633 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1634 comm_mode, gb, gb_len);
1635 if (rc < 0) {
1636 nfc_dev_err(&dev->interface->dev,
1637 "Error when signaling target activation");
1638 return rc;
1639 }
1640
51ad304c 1641 dev->tgt_mode = 1;
103b34cf
SO		 1642 queue_work(dev->wq, &dev->tg_work);
1643
1644 return 0;
fe7c5800
SO		 1645}
1646
6fbbdc16 1647static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1648{
37cf4fc6 1649 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1650
1651 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1652
6fbbdc16
SO		 1653 dev->cancel_listen = 1;
1654
6fbbdc16
SO		 1655 pn533_poll_next_mod(dev);
1656
1657 queue_work(dev->wq, &dev->poll_work);
1658}
1659
1660static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1661 struct sk_buff *resp)
6fbbdc16
SO		 1662{
1663 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1664 int rc;
1665
6fbbdc16 1666 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1667
b5193e5d
WR		 1668 if (IS_ERR(resp)) {
1669 rc = PTR_ERR(resp);
1670
1671 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1672 __func__, rc);
1673
1674 if (rc == -ENOENT) {
1675 if (dev->poll_mod_count != 0)
1676 return rc;
1677 else
1678 goto stop_poll;
1679 } else if (rc < 0) {
1680 nfc_dev_err(&dev->interface->dev,
1681 "Error %d when running poll", rc);
1682 goto stop_poll;
1683 }
6fbbdc16 1684 }
ad3823ce 1685
6fbbdc16
SO		 1686 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1687
b5193e5d 1688 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1689 del_timer(&dev->listen_timer);
b5193e5d
WR		 1690 rc = pn533_init_target_complete(dev, resp);
1691 goto done;
6fbbdc16
SO		 1692 }
1693
b5193e5d
WR		 1694 /* Initiator mode */
1695 rc = pn533_start_poll_complete(dev, resp);
1696 if (!rc)
1697 goto done;
6fbbdc16 1698
95cb9e10
WR		 1699 if (!dev->poll_mod_count) {
1700 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1701 goto done;
1702 }
1703
b5193e5d 1704 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1705 queue_work(dev->wq, &dev->poll_work);
1706
b5193e5d
WR		 1707done:
1708 dev_kfree_skb(resp);
1709 return rc;
6fbbdc16
SO		 1710
1711stop_poll:
b5193e5d
WR		 1712 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1713
6fbbdc16
SO		 1714 pn533_poll_reset_mod_list(dev);
1715 dev->poll_protocols = 0;
b5193e5d 1716 return rc;
ad3823ce
SO		 1717}
1718
9e2d493e
WR		 1719static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1720 struct pn533_poll_modulations *mod)
c46ee386 1721{
b5193e5d 1722 struct sk_buff *skb;
c46ee386 1723
9e2d493e 1724 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1725 if (!skb)
1726 return NULL;
c46ee386 1727
b5193e5d 1728 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1729
b5193e5d 1730 return skb;
6fbbdc16 1731}
c46ee386 1732
6fbbdc16
SO		 1733static int pn533_send_poll_frame(struct pn533 *dev)
1734{
b5193e5d
WR		 1735 struct pn533_poll_modulations *mod;
1736 struct sk_buff *skb;
6fbbdc16 1737 int rc;
b5193e5d 1738 u8 cmd_code;
c46ee386 1739
b5193e5d 1740 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1741
b5193e5d
WR		 1742 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1743 __func__, mod->len);
c46ee386 1744
b5193e5d
WR		 1745 if (mod->len == 0) { /* Listen mode */
1746 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1747 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1748 } else { /* Polling mode */
1749 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1750 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1751 }
1752
1753 if (!skb) {
1754 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1755 return -ENOMEM;
1756 }
1757
1758 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1759 NULL);
1760 if (rc < 0) {
1761 dev_kfree_skb(skb);
6fbbdc16 1762 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1763 }
c46ee386 1764
6fbbdc16
SO		 1765 return rc;
1766}
1767
1768static void pn533_wq_poll(struct work_struct *work)
1769{
1770 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1771 struct pn533_poll_modulations *cur_mod;
1772 int rc;
1773
1774 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1775
1776 nfc_dev_dbg(&dev->interface->dev,
1777 "%s cancel_listen %d modulation len %d",
1778 __func__, dev->cancel_listen, cur_mod->len);
1779
1780 if (dev->cancel_listen == 1) {
1781 dev->cancel_listen = 0;
10cff29a 1782 pn533_abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1783 }
1784
6fbbdc16
SO		 1785 rc = pn533_send_poll_frame(dev);
1786 if (rc)
1787 return;
c46ee386 1788
6fbbdc16
SO		 1789 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1790 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1791
6fbbdc16 1792 return;
c46ee386
AAJ		 1793}
1794
fe7c5800
SO		 1795static int pn533_start_poll(struct nfc_dev *nfc_dev,
1796 u32 im_protocols, u32 tm_protocols)
1797{
1798 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1799
1800 nfc_dev_dbg(&dev->interface->dev,
1801 "%s: im protocols 0x%x tm protocols 0x%x",
1802 __func__, im_protocols, tm_protocols);
1803
1804 if (dev->tgt_active_prot) {
1805 nfc_dev_err(&dev->interface->dev,
1806 "Cannot poll with a target already activated");
1807 return -EBUSY;
1808 }
1809
51ad304c
SO		 1810 if (dev->tgt_mode) {
1811 nfc_dev_err(&dev->interface->dev,
1812 "Cannot poll while already being activated");
1813 return -EBUSY;
1814 }
1815
6fbbdc16
SO		 1816 if (tm_protocols) {
1817 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1818 if (dev->gb == NULL)
1819 tm_protocols = 0;
1820 }
ad3823ce 1821
6fbbdc16
SO		 1822 dev->poll_mod_curr = 0;
1823 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1824 dev->poll_protocols = im_protocols;
1825 dev->listen_protocols = tm_protocols;
ad3823ce 1826
6fbbdc16 1827 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1828}
1829
c46ee386
AAJ		 1830static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1831{
1832 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1833
1834 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1835
6fbbdc16
SO		 1836 del_timer(&dev->listen_timer);
1837
c46ee386 1838 if (!dev->poll_mod_count) {
6ca55372
WR		 1839 nfc_dev_dbg(&dev->interface->dev,
1840 "Polling operation was not running");
c46ee386
AAJ		 1841 return;
1842 }
1843
10cff29a 1844 pn533_abort_cmd(dev, GFP_KERNEL);
7c2a04a9 1845 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1846}
1847
1848static int pn533_activate_target_nfcdep(struct pn533 *dev)
1849{
cb950d93 1850 struct pn533_cmd_activate_response *rsp;
541d920b 1851 u16 gt_len;
c46ee386
AAJ		 1852 int rc;
1853
cb950d93
WR		 1854 struct sk_buff *skb;
1855 struct sk_buff *resp;
c46ee386 1856
cb950d93 1857 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1858
9e2d493e 1859 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1860 if (!skb)
1861 return -ENOMEM;
c46ee386 1862
cb950d93
WR		 1863 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1864 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1865
cb950d93
WR		 1866 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1867 if (IS_ERR(resp))
1868 return PTR_ERR(resp);
c46ee386 1869
37cf4fc6 1870 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1871 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1872 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1873 nfc_dev_err(&dev->interface->dev,
1874 "Target activation failed (error 0x%x)", rc);
cb950d93 1875 dev_kfree_skb(resp);
c46ee386 1876 return -EIO;
8a0ecfe7 1877 }
c46ee386 1878
541d920b 1879 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1880 gt_len = resp->len - 16;
1881 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1882
cb950d93 1883 dev_kfree_skb(resp);
541d920b 1884 return rc;
c46ee386
AAJ		 1885}
1886
90099433
EL		 1887static int pn533_activate_target(struct nfc_dev *nfc_dev,
1888 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1889{
1890 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1891 int rc;
1892
1893 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1894 protocol);
c46ee386
AAJ		 1895
1896 if (dev->poll_mod_count) {
6ca55372
WR		 1897 nfc_dev_err(&dev->interface->dev,
1898 "Cannot activate while polling");
c46ee386
AAJ		 1899 return -EBUSY;
1900 }
1901
1902 if (dev->tgt_active_prot) {
6ca55372
WR		 1903 nfc_dev_err(&dev->interface->dev,
1904 "There is already an active target");
c46ee386
AAJ		 1905 return -EBUSY;
1906 }
1907
1908 if (!dev->tgt_available_prots) {
6ca55372
WR		 1909 nfc_dev_err(&dev->interface->dev,
1910 "There is no available target to activate");
c46ee386
AAJ		 1911 return -EINVAL;
1912 }
1913
1914 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1915 nfc_dev_err(&dev->interface->dev,
1916 "Target doesn't support requested proto %u",
1917 protocol);
c46ee386
AAJ		 1918 return -EINVAL;
1919 }
1920
1921 if (protocol == NFC_PROTO_NFC_DEP) {
1922 rc = pn533_activate_target_nfcdep(dev);
1923 if (rc) {
6ca55372
WR		 1924 nfc_dev_err(&dev->interface->dev,
1925 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1926 return rc;
1927 }
1928 }
1929
1930 dev->tgt_active_prot = protocol;
1931 dev->tgt_available_prots = 0;
1932
1933 return 0;
1934}
1935
90099433
EL		 1936static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1937 struct nfc_target *target)
c46ee386
AAJ		 1938{
1939 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1940
1941 struct sk_buff *skb;
1942 struct sk_buff *resp;
1943
c46ee386
AAJ		 1944 int rc;
1945
1946 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1947
1948 if (!dev->tgt_active_prot) {
1949 nfc_dev_err(&dev->interface->dev, "There is no active target");
1950 return;
1951 }
1952
1953 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1954 skb_queue_purge(&dev->resp_q);
1955
9e2d493e 1956 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1957 if (!skb)
1958 return;
c46ee386 1959
cb950d93 1960 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1961
cb950d93
WR		 1962 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1963 if (IS_ERR(resp))
c46ee386 1964 return;
c46ee386 1965
cb950d93 1966 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1967 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1968 nfc_dev_err(&dev->interface->dev,
1969 "Error 0x%x when releasing the target", rc);
c46ee386 1970
cb950d93 1971 dev_kfree_skb(resp);
c46ee386
AAJ		 1972 return;
1973}
1974
361f3cb7
SO		 1975
1976static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1977 struct sk_buff *resp)
361f3cb7 1978{
13003649 1979 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1980 u8 target_gt_len;
1981 int rc;
13003649 1982 u8 active = *(u8 *)arg;
70418e6e
WR		 1983
1984 kfree(arg);
361f3cb7 1985
13003649
WR		 1986 if (IS_ERR(resp))
1987 return PTR_ERR(resp);
361f3cb7
SO		 1988
1989 if (dev->tgt_available_prots &&
1990 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1991 nfc_dev_err(&dev->interface->dev,
5d467742 1992 "The target does not support DEP");
13003649
WR		 1993 rc = -EINVAL;
1994 goto error;
361f3cb7
SO		 1995 }
1996
13003649
WR		 1997 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1998
1999 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 2000 if (rc != PN533_CMD_RET_SUCCESS) {
2001 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2002 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 2003 goto error;
361f3cb7
SO		 2004 }
2005
2006 if (!dev->tgt_available_prots) {
13003649
WR		 2007 struct nfc_target nfc_target;
2008
361f3cb7
SO		 2009 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2010
2011 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 2012 nfc_target.nfcid1_len = 10;
13003649 2013 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 2014 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2015 if (rc)
13003649 2016 goto error;
361f3cb7
SO		 2017
2018 dev->tgt_available_prots = 0;
2019 }
2020
2021 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2022
2023 /* ATR_RES general bytes are located at offset 17 */
13003649 2024 target_gt_len = resp->len - 17;
361f3cb7 2025 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 2026 rsp->gt, target_gt_len);
361f3cb7
SO		 2027 if (rc == 0)
2028 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 2029 dev->nfc_dev->targets[0].idx,
2030 !active, NFC_RF_INITIATOR);
361f3cb7 2031
13003649
WR		 2032error:
2033 dev_kfree_skb(resp);
2034 return rc;
361f3cb7
SO		 2035}
2036
41a8ec49
SO		 2037static int pn533_mod_to_baud(struct pn533 *dev)
2038{
2039 switch (dev->poll_mod_curr) {
2040 case PN533_POLL_MOD_106KBPS_A:
2041 return 0;
2042 case PN533_POLL_MOD_212KBPS_FELICA:
2043 return 1;
2044 case PN533_POLL_MOD_424KBPS_FELICA:
2045 return 2;
2046 default:
2047 return -EINVAL;
2048 }
2049}
2050
d7f3345d 2051#define PASSIVE_DATA_LEN 5
90099433 2052static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 2053 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 2054{
2055 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 2056 struct sk_buff *skb;
2057 int rc, baud, skb_len;
2058 u8 *next, *arg;
2059
d7f3345d 2060 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 2061
2062 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2063
361f3cb7
SO		 2064 if (dev->poll_mod_count) {
2065 nfc_dev_err(&dev->interface->dev,
5d467742 2066 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 2067 return -EBUSY;
2068 }
2069
2070 if (dev->tgt_active_prot) {
2071 nfc_dev_err(&dev->interface->dev,
5d467742 2072 "There is already an active target");
361f3cb7
SO		 2073 return -EBUSY;
2074 }
2075
41a8ec49
SO		 2076 baud = pn533_mod_to_baud(dev);
2077 if (baud < 0) {
2078 nfc_dev_err(&dev->interface->dev,
2079 "Invalid curr modulation %d", dev->poll_mod_curr);
2080 return baud;
2081 }
2082
13003649 2083 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 2084 if (comm_mode == NFC_COMM_PASSIVE)
13003649 2085 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2086
9e2d493e 2087 skb = pn533_alloc_skb(dev, skb_len);
13003649 2088 if (!skb)
361f3cb7
SO		 2089 return -ENOMEM;
2090
13003649
WR		 2091 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2092 *skb_put(skb, 1) = baud; /* Baud rate */
2093
2094 next = skb_put(skb, 1); /* Next */
2095 *next = 0;
361f3cb7 2096
13003649
WR		 2097 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2098 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2099 PASSIVE_DATA_LEN);
2100 *next |= 1;
d7f3345d
SO		 2101 }
2102
47807d3d 2103 if (gb != NULL && gb_len > 0) {
13003649
WR		 2104 memcpy(skb_put(skb, gb_len), gb, gb_len);
2105 *next |= 4; /* We have some Gi */
361f3cb7 2106 } else {
13003649 2107 *next = 0;
361f3cb7
SO		 2108 }
2109
13003649
WR		 2110 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2111 if (!arg) {
2112 dev_kfree_skb(skb);
2113 return -ENOMEM;
2114 }
361f3cb7 2115
13003649 2116 *arg = !comm_mode;
361f3cb7 2117
13003649
WR		 2118 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2119 pn533_in_dep_link_up_complete, arg);
2120
2121 if (rc < 0) {
2122 dev_kfree_skb(skb);
2123 kfree(arg);
2124 }
361f3cb7
SO		 2125
2126 return rc;
2127}
2128
2129static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2130{
6fbbdc16
SO		 2131 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2132
fcfafc76
WR		 2133 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2134
6fbbdc16
SO		 2135 pn533_poll_reset_mod_list(dev);
2136
10cff29a
WR		 2137 if (dev->tgt_mode || dev->tgt_active_prot)
2138 pn533_abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 2139
2140 dev->tgt_active_prot = 0;
2141 dev->tgt_mode = 0;
2142
2143 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2144
2145 return 0;
2146}
2147
c46ee386 2148struct pn533_data_exchange_arg {
c46ee386
AAJ		 2149 data_exchange_cb_t cb;
2150 void *cb_context;
2151};
2152
6ff73fd2
SO		 2153static struct sk_buff *pn533_build_response(struct pn533 *dev)
2154{
2155 struct sk_buff *skb, *tmp, *t;
2156 unsigned int skb_len = 0, tmp_len = 0;
2157
fcfafc76 2158 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2159
2160 if (skb_queue_empty(&dev->resp_q))
2161 return NULL;
2162
2163 if (skb_queue_len(&dev->resp_q) == 1) {
2164 skb = skb_dequeue(&dev->resp_q);
2165 goto out;
2166 }
2167
2168 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2169 skb_len += tmp->len;
2170
2171 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2172 __func__, skb_len);
2173
2174 skb = alloc_skb(skb_len, GFP_KERNEL);
2175 if (skb == NULL)
2176 goto out;
2177
2178 skb_put(skb, skb_len);
2179
2180 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2181 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2182 tmp_len += tmp->len;
2183 }
2184
2185out:
2186 skb_queue_purge(&dev->resp_q);
2187
2188 return skb;
2189}
2190
c46ee386 2191static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2192 struct sk_buff *resp)
c46ee386
AAJ		 2193{
2194 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2195 struct sk_buff *skb;
2196 int rc = 0;
2197 u8 status, ret, mi;
c46ee386
AAJ		 2198
2199 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2200
b1e666f5
WR		 2201 if (IS_ERR(resp)) {
2202 rc = PTR_ERR(resp);
2203 goto _error;
c46ee386
AAJ		 2204 }
2205
b1e666f5
WR		 2206 status = resp->data[0];
2207 ret = status & PN533_CMD_RET_MASK;
2208 mi = status & PN533_CMD_MI_MASK;
2209
2210 skb_pull(resp, sizeof(status));
c46ee386 2211
b1e666f5
WR		 2212 if (ret != PN533_CMD_RET_SUCCESS) {
2213 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2214 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2215 rc = -EIO;
c46ee386
AAJ		 2216 goto error;
2217 }
2218
b1e666f5 2219 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2220
b1e666f5
WR		 2221 if (mi) {
2222 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2223 queue_work(dev->wq, &dev->mi_work);
2224 return -EINPROGRESS;
c46ee386
AAJ		 2225 }
2226
6ff73fd2 2227 skb = pn533_build_response(dev);
b1e666f5 2228 if (!skb)
6ff73fd2 2229 goto error;
c46ee386 2230
6ff73fd2 2231 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2232 kfree(arg);
2233 return 0;
2234
2235error:
b1e666f5
WR		 2236 dev_kfree_skb(resp);
2237_error:
6ff73fd2 2238 skb_queue_purge(&dev->resp_q);
b1e666f5 2239 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2240 kfree(arg);
b1e666f5 2241 return rc;
c46ee386
AAJ		 2242}
2243
be9ae4ce
SO		 2244static int pn533_transceive(struct nfc_dev *nfc_dev,
2245 struct nfc_target *target, struct sk_buff *skb,
2246 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2247{
2248 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2249 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2250 int rc;
2251
2252 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2253
b1e666f5
WR		 2254 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2255 /* TODO: Implement support to multi-part data exchange */
2256 nfc_dev_err(&dev->interface->dev,
2257 "Data length greater than the max allowed: %d",
2258 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2259 rc = -ENOSYS;
2260 goto error;
2261 }
2262
c46ee386 2263 if (!dev->tgt_active_prot) {
6ca55372
WR		 2264 nfc_dev_err(&dev->interface->dev,
2265 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2266 rc = -EINVAL;
2267 goto error;
2268 }
2269
b1e666f5 2270 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2271 if (!arg) {
2272 rc = -ENOMEM;
b1e666f5 2273 goto error;
c46ee386
AAJ		 2274 }
2275
c46ee386
AAJ		 2276 arg->cb = cb;
2277 arg->cb_context = cb_context;
2278
b1e666f5
WR		 2279 switch (dev->device_type) {
2280 case PN533_DEVICE_PASORI:
2281 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2282 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2283 skb,
2284 pn533_data_exchange_complete,
2285 arg);
2286
2287 break;
2288 }
2289 default:
2290 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2291
2292 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2293 skb, pn533_data_exchange_complete,
2294 arg);
2295
2296 break;
c46ee386
AAJ		 2297 }
2298
b1e666f5
WR		 2299 if (rc < 0) /* rc from send_async */
2300 goto error;
2301
c46ee386
AAJ		 2302 return 0;
2303
c46ee386 2304error:
b1e666f5
WR		 2305 kfree(arg);
2306 dev_kfree_skb(skb);
c46ee386
AAJ		 2307 return rc;
2308}
2309
dadb06f2 2310static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2311 struct sk_buff *resp)
dadb06f2 2312{
e4878823 2313 u8 status;
5b412fd1 2314
dadb06f2
SO		 2315 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2316
e4878823
WR		 2317 if (IS_ERR(resp))
2318 return PTR_ERR(resp);
5b412fd1 2319
e4878823 2320 status = resp->data[0];
dadb06f2 2321
e4878823 2322 dev_kfree_skb(resp);
dadb06f2 2323
e4878823 2324 if (status != 0) {
dadb06f2
SO		 2325 nfc_tm_deactivated(dev->nfc_dev);
2326
51ad304c
SO		 2327 dev->tgt_mode = 0;
2328
dadb06f2
SO		 2329 return 0;
2330 }
2331
2332 queue_work(dev->wq, &dev->tg_work);
2333
2334 return 0;
2335}
2336
2337static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2338{
2339 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2340 int rc;
2341
2342 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2343
e4878823 2344 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2345 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2346 "Data length greater than the max allowed: %d",
2347 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2348 return -ENOSYS;
dadb06f2
SO		 2349 }
2350
e4878823
WR		 2351 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2352 pn533_tm_send_complete, NULL);
2353 if (rc < 0)
2354 dev_kfree_skb(skb);
dadb06f2
SO		 2355
2356 return rc;
2357}
2358
6ff73fd2
SO		 2359static void pn533_wq_mi_recv(struct work_struct *work)
2360{
2361 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2362
2363 struct sk_buff *skb;
6ff73fd2
SO		 2364 int rc;
2365
2366 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2367
9e2d493e 2368 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2369 if (!skb)
2370 goto error;
6ff73fd2 2371
b1e666f5
WR		 2372 switch (dev->device_type) {
2373 case PN533_DEVICE_PASORI:
2374 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2375 rc = pn533_send_cmd_direct_async(dev,
2376 PN533_CMD_IN_COMM_THRU,
2377 skb,
2378 pn533_data_exchange_complete,
2379 dev->cmd_complete_mi_arg);
6ff73fd2 2380
b1e666f5
WR		 2381 break;
2382 }
2383 default:
2384 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2385
b1e666f5
WR		 2386 rc = pn533_send_cmd_direct_async(dev,
2387 PN533_CMD_IN_DATA_EXCHANGE,
2388 skb,
2389 pn533_data_exchange_complete,
2390 dev->cmd_complete_mi_arg);
b1bb290a 2391
b1e666f5 2392 break;
6ff73fd2
SO		 2393 }
2394
b1e666f5 2395 if (rc == 0) /* success */
6ff73fd2
SO		 2396 return;
2397
b1e666f5
WR		 2398 nfc_dev_err(&dev->interface->dev,
2399 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2400
b1e666f5 2401 dev_kfree_skb(skb);
140ef7f6 2402 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2403
b1e666f5 2404error:
6ff73fd2 2405 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2406 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2407}
2408
c46ee386
AAJ		 2409static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2410 u8 cfgdata_len)
2411{
cb950d93
WR		 2412 struct sk_buff *skb;
2413 struct sk_buff *resp;
2414
2415 int skb_len;
c46ee386
AAJ		 2416
2417 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2418
cb950d93 2419 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2420
9e2d493e 2421 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2422 if (!skb)
2423 return -ENOMEM;
c46ee386 2424
cb950d93
WR		 2425 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2426 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2427
cb950d93
WR		 2428 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2429 if (IS_ERR(resp))
2430 return PTR_ERR(resp);
c46ee386 2431
cb950d93
WR		 2432 dev_kfree_skb(resp);
2433 return 0;
2434}
2435
2436static int pn533_get_firmware_version(struct pn533 *dev,
2437 struct pn533_fw_version *fv)
2438{
2439 struct sk_buff *skb;
2440 struct sk_buff *resp;
2441
9e2d493e 2442 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2443 if (!skb)
2444 return -ENOMEM;
2445
2446 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2447 if (IS_ERR(resp))
2448 return PTR_ERR(resp);
2449
2450 fv->ic = resp->data[0];
2451 fv->ver = resp->data[1];
2452 fv->rev = resp->data[2];
2453 fv->support = resp->data[3];
2454
2455 dev_kfree_skb(resp);
2456 return 0;
c46ee386
AAJ		 2457}
2458
f75c2913 2459static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2460{
cb950d93
WR		 2461 struct sk_buff *skb;
2462 struct sk_buff *resp;
5c7b0531
SO		 2463
2464 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2465
9e2d493e 2466 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2467 if (!skb)
2468 return -ENOMEM;
5c7b0531 2469
cb950d93 2470 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2471
cb950d93
WR		 2472 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2473 if (IS_ERR(resp))
2474 return PTR_ERR(resp);
5c7b0531 2475
cb950d93 2476 dev_kfree_skb(resp);
5c7b0531 2477
94c5c156 2478 return 0;
5c7b0531
SO		 2479}
2480
53cf4839
WR		 2481struct pn533_acr122_poweron_rdr_arg {
2482 int rc;
2483 struct completion done;
2484};
2485
2486static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2487{
2488 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2489
2490 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2491
2492 print_hex_dump(KERN_ERR, "ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2493 urb->transfer_buffer, urb->transfer_buffer_length,
2494 false);
2495
2496 arg->rc = urb->status;
2497 complete(&arg->done);
2498}
2499
2500static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2501{
2502 /* Power on th reader (CCID cmd) */
2503 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2504 0, 0, 0, 0, 0, 0, 3, 0, 0};
2505 u8 buf[255];
2506 int rc;
2507 void *cntx;
2508 struct pn533_acr122_poweron_rdr_arg arg;
2509
2510 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2511
2512 init_completion(&arg.done);
2513 cntx = dev->in_urb->context; /* backup context */
2514
2515 dev->in_urb->transfer_buffer = buf;
2516 dev->in_urb->transfer_buffer_length = 255;
2517 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2518 dev->in_urb->context = &arg;
2519
2520 dev->out_urb->transfer_buffer = cmd;
2521 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2522
2523 print_hex_dump(KERN_ERR, "ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2524 cmd, sizeof(cmd), false);
2525
2526 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2527 if (rc) {
2528 nfc_dev_err(&dev->interface->dev,
2529 "Reader power on cmd error %d", rc);
2530 return rc;
2531 }
2532
2533 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2534 if (rc) {
2535 nfc_dev_err(&dev->interface->dev,
2536 "Can't submit for reader power on cmd response %d",
2537 rc);
2538 return rc;
2539 }
2540
2541 wait_for_completion(&arg.done);
2542 dev->in_urb->context = cntx; /* restore context */
2543
2544 return arg.rc;
2545}
2546
60d9edd5
SO		 2547static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2548{
2549 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2550 u8 rf_field = !!rf;
2551 int rc;
2552
2553 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2554 (u8 *)&rf_field, 1);
2555 if (rc) {
2556 nfc_dev_err(&dev->interface->dev,
2557 "Error on setting RF field");
2558 return rc;
2559 }
2560
2561 return rc;
2562}
2563
2564int pn533_dev_up(struct nfc_dev *nfc_dev)
2565{
2566 return pn533_rf_field(nfc_dev, 1);
2567}
2568
2569int pn533_dev_down(struct nfc_dev *nfc_dev)
2570{
2571 return pn533_rf_field(nfc_dev, 0);
2572}
2573
5c7b0531 2574static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2575 .dev_up = pn533_dev_up,
2576 .dev_down = pn533_dev_down,
361f3cb7
SO		 2577 .dep_link_up = pn533_dep_link_up,
2578 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2579 .start_poll = pn533_start_poll,
2580 .stop_poll = pn533_stop_poll,
2581 .activate_target = pn533_activate_target,
2582 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2583 .im_transceive = pn533_transceive,
dadb06f2 2584 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2585};
2586
5c7b0531
SO		 2587static int pn533_setup(struct pn533 *dev)
2588{
2589 struct pn533_config_max_retries max_retries;
2590 struct pn533_config_timing timing;
2591 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2592 int rc;
2593
2594 switch (dev->device_type) {
2595 case PN533_DEVICE_STD:
2596 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2597 max_retries.mx_rty_psl = 2;
2598 max_retries.mx_rty_passive_act =
2599 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2600
2601 timing.rfu = PN533_CONFIG_TIMING_102;
2602 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2603 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2604
2605 break;
2606
2607 case PN533_DEVICE_PASORI:
53cf4839 2608 case PN533_DEVICE_ACR122U:
5c7b0531
SO		 2609 max_retries.mx_rty_atr = 0x2;
2610 max_retries.mx_rty_psl = 0x1;
2611 max_retries.mx_rty_passive_act =
2612 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2613
2614 timing.rfu = PN533_CONFIG_TIMING_102;
2615 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2616 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2617
2618 break;
2619
2620 default:
2621 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2622 dev->device_type);
2623 return -EINVAL;
2624 }
2625
2626 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2627 (u8 *)&max_retries, sizeof(max_retries));
2628 if (rc) {
2629 nfc_dev_err(&dev->interface->dev,
2630 "Error on setting MAX_RETRIES config");
2631 return rc;
2632 }
2633
2634
2635 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2636 (u8 *)&timing, sizeof(timing));
2637 if (rc) {
2638 nfc_dev_err(&dev->interface->dev,
2639 "Error on setting RF timings");
2640 return rc;
2641 }
2642
2643 switch (dev->device_type) {
2644 case PN533_DEVICE_STD:
2645 break;
2646
2647 case PN533_DEVICE_PASORI:
f75c2913 2648 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2649
2650 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2651 pasori_cfg, 3);
2652 if (rc) {
2653 nfc_dev_err(&dev->interface->dev,
2654 "Error while settings PASORI config");
2655 return rc;
2656 }
2657
f75c2913 2658 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2659
2660 break;
2661 }
2662
2663 return 0;
2664}
2665
c46ee386
AAJ		 2666static int pn533_probe(struct usb_interface *interface,
2667 const struct usb_device_id *id)
2668{
cb950d93 2669 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2670 struct pn533 *dev;
2671 struct usb_host_interface *iface_desc;
2672 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2673 int in_endpoint = 0;
2674 int out_endpoint = 0;
2675 int rc = -ENOMEM;
2676 int i;
2677 u32 protocols;
2678
2679 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2680 if (!dev)
2681 return -ENOMEM;
2682
2683 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2684 dev->interface = interface;
0201ed03 2685 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2686
2687 iface_desc = interface->cur_altsetting;
2688 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2689 endpoint = &iface_desc->endpoint[i].desc;
2690
8d25ca79 2691 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2692 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2693
8d25ca79 2694 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2695 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2696 }
2697
2698 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2699 nfc_dev_err(&interface->dev,
2700 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2701 rc = -ENODEV;
2702 goto error;
2703 }
2704
c46ee386 2705 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2706 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2707
a5798094 2708 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2709 goto error;
2710
2711 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2712 usb_rcvbulkpipe(dev->udev, in_endpoint),
2713 NULL, 0, NULL, dev);
c46ee386 2714 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2715 usb_sndbulkpipe(dev->udev, out_endpoint),
2716 NULL, 0, pn533_send_complete, dev);
c46ee386 2717
5d50b364
SO		 2718 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2719 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2720 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2721 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2722 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2723 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2724 if (dev->wq == NULL)
2725 goto error;
c46ee386 2726
6fbbdc16
SO		 2727 init_timer(&dev->listen_timer);
2728 dev->listen_timer.data = (unsigned long) dev;
2729 dev->listen_timer.function = pn533_listen_mode_timer;
2730
6ff73fd2
SO		 2731 skb_queue_head_init(&dev->resp_q);
2732
5d50b364
SO		 2733 INIT_LIST_HEAD(&dev->cmd_queue);
2734
c46ee386
AAJ		 2735 usb_set_intfdata(interface, dev);
2736
9e2d493e 2737 dev->ops = &pn533_std_frame_ops;
c46ee386 2738
58520373 2739 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
5c7b0531
SO		 2740 dev->device_type = id->driver_info;
2741 switch (dev->device_type) {
2742 case PN533_DEVICE_STD:
2743 protocols = PN533_ALL_PROTOCOLS;
2744 break;
2745
2746 case PN533_DEVICE_PASORI:
2747 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2748 break;
2749
53cf4839
WR		 2750 case PN533_DEVICE_ACR122U:
2751 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2752 dev->ops = &pn533_acr122_frame_ops;
2753 dev->protocol_type = PN533_PROTO_REQ_RESP,
2754
2755 rc = pn533_acr122_poweron_rdr(dev);
2756 if (rc < 0) {
2757 nfc_dev_err(&dev->interface->dev,
2758 "Couldn't poweron the reader (error %d)",
2759 rc);
2760 goto destroy_wq;
2761 }
2762 break;
2763
5c7b0531
SO		 2764 default:
2765 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2766 dev->device_type);
2767 rc = -EINVAL;
2768 goto destroy_wq;
2769 }
c46ee386 2770
9e2d493e
WR		 2771 memset(&fw_ver, 0, sizeof(fw_ver));
2772 rc = pn533_get_firmware_version(dev, &fw_ver);
2773 if (rc < 0)
2774 goto destroy_wq;
2775
2776 nfc_dev_info(&dev->interface->dev,
2777 "NXP PN533 firmware ver %d.%d now attached",
2778 fw_ver.ver, fw_ver.rev);
2779
2780
e8753043 2781 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
390a1bd8 2782 NFC_SE_NONE,
9e2d493e 2783 dev->ops->tx_header_len +
e8753043 2784 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2785 dev->ops->tx_tail_len);
c46ee386 2786 if (!dev->nfc_dev)
4849f85e 2787 goto destroy_wq;
c46ee386
AAJ		 2788
2789 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2790 nfc_set_drvdata(dev->nfc_dev, dev);
2791
2792 rc = nfc_register_device(dev->nfc_dev);
2793 if (rc)
2794 goto free_nfc_dev;
2795
5c7b0531
SO		 2796 rc = pn533_setup(dev);
2797 if (rc)
34a85bfc 2798 goto unregister_nfc_dev;
34a85bfc 2799
c46ee386
AAJ		 2800 return 0;
2801
9f2f8ba1
SO		 2802unregister_nfc_dev:
2803 nfc_unregister_device(dev->nfc_dev);
2804
c46ee386
AAJ		 2805free_nfc_dev:
2806 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2807
4849f85e
SO		 2808destroy_wq:
2809 destroy_workqueue(dev->wq);
c46ee386 2810error:
c46ee386 2811 usb_free_urb(dev->in_urb);
c46ee386 2812 usb_free_urb(dev->out_urb);
7c5a54fb 2813 usb_put_dev(dev->udev);
c46ee386
AAJ		 2814 kfree(dev);
2815 return rc;
2816}
2817
2818static void pn533_disconnect(struct usb_interface *interface)
2819{
2820 struct pn533 *dev;
5d50b364 2821 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2822
2823 dev = usb_get_intfdata(interface);
2824 usb_set_intfdata(interface, NULL);
2825
2826 nfc_unregister_device(dev->nfc_dev);
2827 nfc_free_device(dev->nfc_dev);
2828
2829 usb_kill_urb(dev->in_urb);
2830 usb_kill_urb(dev->out_urb);
2831
4849f85e 2832 destroy_workqueue(dev->wq);
c46ee386 2833
6ff73fd2
SO		 2834 skb_queue_purge(&dev->resp_q);
2835
6fbbdc16
SO		 2836 del_timer(&dev->listen_timer);
2837
5d50b364
SO		 2838 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2839 list_del(&cmd->queue);
2840 kfree(cmd);
2841 }
2842
c46ee386 2843 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2844 usb_free_urb(dev->out_urb);
2845 kfree(dev);
2846
276556db 2847 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2848}
2849
2850static struct usb_driver pn533_driver = {
2851 .name = "pn533",
2852 .probe = pn533_probe,
2853 .disconnect = pn533_disconnect,
2854 .id_table = pn533_table,
2855};
2856
fe748483 2857module_usb_driver(pn533_driver);
c46ee386 2858
e70b96e9
WR		 2859MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2860MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2861MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2862MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2863MODULE_VERSION(VERSION);
2864MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)