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NFC: pn533: Unconditionaly select the highest p2p bit rate
[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,
a94e10f7 260 .rc = PN533_FELICA_SENSF_RC_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,
a94e10f7 273 .rc = PN533_FELICA_SENSF_RC_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;
17e9d9d4 362 struct work_struct rf_work;
d5590bba
WR		 363
364 struct list_head cmd_queue;
365 struct pn533_cmd *cmd;
366 u8 cmd_pending;
d5590bba 367 struct mutex cmd_lock; /* protects cmd queue */
c46ee386 368
b1e666f5 369 void *cmd_complete_mi_arg;
c46ee386
AAJ		 370
371 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
372 u8 poll_mod_count;
373 u8 poll_mod_curr;
374 u32 poll_protocols;
6fbbdc16 375 u32 listen_protocols;
d5590bba
WR		 376 struct timer_list listen_timer;
377 int cancel_listen;
6fbbdc16
SO		 378
379 u8 *gb;
380 size_t gb_len;
c46ee386
AAJ		 381
382 u8 tgt_available_prots;
383 u8 tgt_active_prot;
51ad304c 384 u8 tgt_mode;
5c7b0531 385
9e2d493e 386 struct pn533_frame_ops *ops;
5d50b364
SO		 387};
388
389struct pn533_cmd {
390 struct list_head queue;
4b2a9532 391 u8 code;
f87bc9fb 392 int status;
aada17ac
WR		 393 struct sk_buff *req;
394 struct sk_buff *resp;
9e2d493e 395 int resp_len;
4231604b
WR		 396 pn533_send_async_complete_t complete_cb;
397 void *complete_cb_context;
c46ee386
AAJ		 398};
399
63123108 400struct pn533_std_frame {
c46ee386
AAJ		 401 u8 preamble;
402 __be16 start_frame;
403 u8 datalen;
404 u8 datalen_checksum;
405 u8 data[];
406} __packed;
407
9e2d493e
WR		 408struct pn533_frame_ops {
409 void (*tx_frame_init)(void *frame, u8 cmd_code);
410 void (*tx_frame_finish)(void *frame);
411 void (*tx_update_payload_len)(void *frame, int len);
412 int tx_header_len;
413 int tx_tail_len;
414
415 bool (*rx_is_frame_valid)(void *frame);
416 int (*rx_frame_size)(void *frame);
417 int rx_header_len;
418 int rx_tail_len;
419
420 int max_payload_len;
421 u8 (*get_cmd_code)(void *frame);
422};
423
53cf4839
WR		 424struct pn533_acr122_ccid_hdr {
425 u8 type;
426 u32 datalen;
427 u8 slot;
428 u8 seq;
429 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
430 byte for reposnse msg */
431 u8 data[]; /* payload */
432} __packed;
433
434struct pn533_acr122_apdu_hdr {
435 u8 class;
436 u8 ins;
437 u8 p1;
438 u8 p2;
439} __packed;
440
441struct pn533_acr122_tx_frame {
442 struct pn533_acr122_ccid_hdr ccid;
443 struct pn533_acr122_apdu_hdr apdu;
444 u8 datalen;
445 u8 data[]; /* pn533 frame: TFI ... */
446} __packed;
447
448struct pn533_acr122_rx_frame {
449 struct pn533_acr122_ccid_hdr ccid;
450 u8 data[]; /* pn533 frame : TFI ... */
451} __packed;
452
453static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
454{
455 struct pn533_acr122_tx_frame *frame = _frame;
456
457 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
458 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
459 sizeof(datalen) */
460 frame->ccid.slot = 0;
461 frame->ccid.seq = 0;
462 frame->ccid.params[0] = 0;
463 frame->ccid.params[1] = 0;
464 frame->ccid.params[2] = 0;
465
466 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
467 frame->data[1] = cmd_code;
468 frame->datalen = 2; /* data[0] + data[1] */
469
470 frame->apdu.class = 0xFF;
471 frame->apdu.ins = 0;
472 frame->apdu.p1 = 0;
473 frame->apdu.p2 = 0;
474}
475
476static void pn533_acr122_tx_frame_finish(void *_frame)
477{
478 struct pn533_acr122_tx_frame *frame = _frame;
479
480 frame->ccid.datalen += frame->datalen;
481}
482
483static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
484{
485 struct pn533_acr122_tx_frame *frame = _frame;
486
487 frame->datalen += len;
488}
489
490static bool pn533_acr122_is_rx_frame_valid(void *_frame)
491{
492 struct pn533_acr122_rx_frame *frame = _frame;
493
494 if (frame->ccid.type != 0x83)
495 return false;
496
497 if (frame->data[frame->ccid.datalen - 2] == 0x63)
498 return false;
499
500 return true;
501}
502
503static int pn533_acr122_rx_frame_size(void *frame)
504{
505 struct pn533_acr122_rx_frame *f = frame;
506
507 /* f->ccid.datalen already includes tail length */
508 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
509}
510
511static u8 pn533_acr122_get_cmd_code(void *frame)
512{
513 struct pn533_acr122_rx_frame *f = frame;
514
515 return PN533_STD_FRAME_CMD(f);
516}
517
518static struct pn533_frame_ops pn533_acr122_frame_ops = {
519 .tx_frame_init = pn533_acr122_tx_frame_init,
520 .tx_frame_finish = pn533_acr122_tx_frame_finish,
521 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
522 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
523 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
524
525 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
526 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
527 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
528 .rx_frame_size = pn533_acr122_rx_frame_size,
529
530 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
531 .get_cmd_code = pn533_acr122_get_cmd_code,
532};
533
c46ee386 534/* The rule: value + checksum = 0 */
63123108 535static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 536{
537 return ~value + 1;
538}
539
540/* The rule: sum(data elements) + checksum = 0 */
63123108 541static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 542{
543 u8 sum = 0;
544 int i;
545
546 for (i = 0; i < datalen; i++)
547 sum += data[i];
548
63123108 549 return pn533_std_checksum(sum);
c46ee386
AAJ		 550}
551
63123108 552static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 553{
63123108 554 struct pn533_std_frame *frame = _frame;
9e2d493e 555
c46ee386 556 frame->preamble = 0;
63123108
WR		 557 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
558 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
559 PN533_STD_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 560 frame->datalen = 2;
561}
562
63123108 563static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 564{
63123108 565 struct pn533_std_frame *frame = _frame;
9e2d493e 566
63123108 567 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 568
63123108
WR		 569 PN533_STD_FRAME_CHECKSUM(frame) =
570 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 571
63123108 572 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 573}
574
63123108 575static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 576{
63123108 577 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 578
579 frame->datalen += len;
580}
581
63123108 582static bool pn533_std_rx_frame_is_valid(void *_frame)
c46ee386
AAJ		 583{
584 u8 checksum;
63123108 585 struct pn533_std_frame *frame = _frame;
c46ee386 586
63123108 587 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 588 return false;
589
63123108 590 checksum = pn533_std_checksum(frame->datalen);
c46ee386
AAJ		 591 if (checksum != frame->datalen_checksum)
592 return false;
593
63123108
WR		 594 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
595 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
c46ee386
AAJ		 596 return false;
597
598 return true;
599}
600
63123108 601static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 602{
63123108 603 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 604 return false;
605
606 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
607 return false;
608
609 return true;
610}
611
63123108 612static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 613{
63123108 614 struct pn533_std_frame *f = frame;
9e2d493e 615
63123108
WR		 616 return sizeof(struct pn533_std_frame) + f->datalen +
617 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 618}
619
63123108 620static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 621{
63123108 622 struct pn533_std_frame *f = frame;
9e2d493e 623
63123108 624 return PN533_STD_FRAME_CMD(f);
9e2d493e
WR		 625}
626
ef3d56e1 627static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 628 .tx_frame_init = pn533_std_tx_frame_init,
629 .tx_frame_finish = pn533_std_tx_frame_finish,
630 .tx_update_payload_len = pn533_std_tx_update_payload_len,
631 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
632 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
633
634 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
635 .rx_frame_size = pn533_std_rx_frame_size,
636 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
637 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
638
639 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
640 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 641};
642
643static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 644{
2c206fb7 645 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 646 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 647}
648
c46ee386
AAJ		 649static void pn533_recv_response(struct urb *urb)
650{
651 struct pn533 *dev = urb->context;
f87bc9fb 652 struct pn533_cmd *cmd = dev->cmd;
9e2d493e 653 u8 *in_frame;
c46ee386 654
f87bc9fb
WR		 655 cmd->status = urb->status;
656
c46ee386
AAJ		 657 switch (urb->status) {
658 case 0:
f8f99171 659 break; /* success */
c46ee386
AAJ		 660 case -ECONNRESET:
661 case -ENOENT:
6ca55372 662 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 663 "The urb has been canceled (status %d)",
664 urb->status);
4849f85e 665 goto sched_wq;
f8f99171 666 case -ESHUTDOWN:
c46ee386 667 default:
6ca55372 668 nfc_dev_err(&dev->interface->dev,
f8f99171 669 "Urb failure (status %d)", urb->status);
4849f85e 670 goto sched_wq;
c46ee386
AAJ		 671 }
672
673 in_frame = dev->in_urb->transfer_buffer;
674
fcfafc76 675 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
e279f84f
SO		 676 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
677 dev->ops->rx_frame_size(in_frame), false);
99e591be 678
9e2d493e 679 if (!dev->ops->rx_is_frame_valid(in_frame)) {
c46ee386 680 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
f87bc9fb 681 cmd->status = -EIO;
4849f85e 682 goto sched_wq;
c46ee386
AAJ		 683 }
684
9e2d493e 685 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 686 nfc_dev_err(&dev->interface->dev,
687 "It it not the response to the last command");
f87bc9fb 688 cmd->status = -EIO;
4849f85e 689 goto sched_wq;
c46ee386
AAJ		 690 }
691
4849f85e 692sched_wq:
5d50b364 693 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 694}
695
696static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
697{
698 dev->in_urb->complete = pn533_recv_response;
699
700 return usb_submit_urb(dev->in_urb, flags);
701}
702
703static void pn533_recv_ack(struct urb *urb)
704{
705 struct pn533 *dev = urb->context;
f87bc9fb 706 struct pn533_cmd *cmd = dev->cmd;
63123108 707 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 708 int rc;
709
f87bc9fb
WR		 710 cmd->status = urb->status;
711
c46ee386
AAJ		 712 switch (urb->status) {
713 case 0:
f8f99171 714 break; /* success */
c46ee386
AAJ		 715 case -ECONNRESET:
716 case -ENOENT:
6ca55372 717 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 718 "The urb has been stopped (status %d)",
719 urb->status);
4849f85e 720 goto sched_wq;
f8f99171 721 case -ESHUTDOWN:
c46ee386 722 default:
6ca55372 723 nfc_dev_err(&dev->interface->dev,
f8f99171 724 "Urb failure (status %d)", urb->status);
4849f85e 725 goto sched_wq;
c46ee386
AAJ		 726 }
727
728 in_frame = dev->in_urb->transfer_buffer;
729
63123108 730 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 731 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
f87bc9fb 732 cmd->status = -EIO;
4849f85e 733 goto sched_wq;
c46ee386
AAJ		 734 }
735
c46ee386
AAJ		 736 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
737 if (rc) {
6ca55372
WR		 738 nfc_dev_err(&dev->interface->dev,
739 "usb_submit_urb failed with result %d", rc);
f87bc9fb 740 cmd->status = rc;
4849f85e 741 goto sched_wq;
c46ee386
AAJ		 742 }
743
744 return;
745
4849f85e 746sched_wq:
5d50b364 747 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 748}
749
750static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
751{
752 dev->in_urb->complete = pn533_recv_ack;
753
754 return usb_submit_urb(dev->in_urb, flags);
755}
756
757static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
758{
63123108 759 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 760 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 761 int rc;
762
763 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
764
5b5a4437
WR		 765 dev->out_urb->transfer_buffer = ack;
766 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 767 rc = usb_submit_urb(dev->out_urb, flags);
768
769 return rc;
770}
771
e8f40531
WR		 772static int __pn533_send_frame_async(struct pn533 *dev,
773 struct sk_buff *out,
774 struct sk_buff *in,
ddf19d20 775 int in_len)
c46ee386
AAJ		 776{
777 int rc;
778
e8f40531
WR		 779 dev->out_urb->transfer_buffer = out->data;
780 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 781
e8f40531
WR		 782 dev->in_urb->transfer_buffer = in->data;
783 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 784
e279f84f
SO		 785 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
786 out->data, out->len, false);
99e591be 787
d94ea4f5 788 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 789 if (rc)
790 return rc;
791
58520373
WR		 792 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
793 /* request for response for sent packet directly */
794 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
795 if (rc)
796 goto error;
797 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
798 /* request for ACK if that's the case */
799 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
800 if (rc)
801 goto error;
802 }
c46ee386
AAJ		 803
804 return 0;
805
806error:
807 usb_unlink_urb(dev->out_urb);
808 return rc;
809}
810
9e2d493e
WR		 811static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
812 struct sk_buff *skb)
aada17ac 813{
aada17ac
WR		 814 /* payload is already there, just update datalen */
815 int payload_len = skb->len;
9e2d493e 816 struct pn533_frame_ops *ops = dev->ops;
aada17ac 817
aada17ac 818
9e2d493e
WR		 819 skb_push(skb, ops->tx_header_len);
820 skb_put(skb, ops->tx_tail_len);
aada17ac 821
9e2d493e
WR		 822 ops->tx_frame_init(skb->data, cmd_code);
823 ops->tx_update_payload_len(skb->data, payload_len);
824 ops->tx_frame_finish(skb->data);
aada17ac
WR		 825}
826
ddf19d20 827static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 828{
ddf19d20 829 struct pn533_cmd *cmd = dev->cmd;
f87bc9fb 830 int status = cmd->status;
aada17ac 831
4231604b
WR		 832 struct sk_buff *req = cmd->req;
833 struct sk_buff *resp = cmd->resp;
aada17ac 834
aada17ac
WR		 835 int rc;
836
837 dev_kfree_skb(req);
838
0c33d262 839 if (status < 0) {
4231604b
WR		 840 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
841 ERR_PTR(status));
aada17ac 842 dev_kfree_skb(resp);
2c206fb7 843 goto done;
aada17ac
WR		 844 }
845
9e2d493e
WR		 846 skb_put(resp, dev->ops->rx_frame_size(resp->data));
847 skb_pull(resp, dev->ops->rx_header_len);
848 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 849
4231604b 850 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 851
2c206fb7 852done:
4231604b 853 kfree(cmd);
2c206fb7 854 dev->cmd = NULL;
aada17ac
WR		 855 return rc;
856}
857
858static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
859 struct sk_buff *req, struct sk_buff *resp,
860 int resp_len,
861 pn533_send_async_complete_t complete_cb,
862 void *complete_cb_context)
863{
864 struct pn533_cmd *cmd;
aada17ac
WR		 865 int rc = 0;
866
fcfafc76 867 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 868
4231604b
WR		 869 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
870 if (!cmd)
aada17ac
WR		 871 return -ENOMEM;
872
4b2a9532 873 cmd->code = cmd_code;
4231604b
WR		 874 cmd->req = req;
875 cmd->resp = resp;
876 cmd->resp_len = resp_len;
877 cmd->complete_cb = complete_cb;
878 cmd->complete_cb_context = complete_cb_context;
aada17ac 879
9e2d493e 880 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 881
882 mutex_lock(&dev->cmd_lock);
883
884 if (!dev->cmd_pending) {
ddf19d20 885 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 886 if (rc)
887 goto error;
888
889 dev->cmd_pending = 1;
2c206fb7 890 dev->cmd = cmd;
aada17ac
WR		 891 goto unlock;
892 }
893
fcfafc76
WR		 894 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
895 cmd_code);
aada17ac 896
aada17ac 897 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 898 list_add_tail(&cmd->queue, &dev->cmd_queue);
899
900 goto unlock;
901
902error:
4231604b 903 kfree(cmd);
aada17ac
WR		 904unlock:
905 mutex_unlock(&dev->cmd_lock);
906 return rc;
15461aeb
WR		 907}
908
909static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
910 struct sk_buff *req,
911 pn533_send_async_complete_t complete_cb,
912 void *complete_cb_context)
913{
914 struct sk_buff *resp;
915 int rc;
9e2d493e
WR		 916 int resp_len = dev->ops->rx_header_len +
917 dev->ops->max_payload_len +
918 dev->ops->rx_tail_len;
15461aeb 919
15461aeb
WR		 920 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
921 if (!resp)
922 return -ENOMEM;
923
924 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
925 complete_cb_context);
926 if (rc)
927 dev_kfree_skb(resp);
928
929 return rc;
aada17ac
WR		 930}
931
932static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
933 struct sk_buff *req,
934 pn533_send_async_complete_t complete_cb,
935 void *complete_cb_context)
936{
937 struct sk_buff *resp;
938 int rc;
9e2d493e
WR		 939 int resp_len = dev->ops->rx_header_len +
940 dev->ops->max_payload_len +
941 dev->ops->rx_tail_len;
aada17ac 942
9e2d493e 943 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 944 if (!resp)
945 return -ENOMEM;
946
9e2d493e
WR		 947 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
948 complete_cb_context);
aada17ac
WR		 949 if (rc)
950 dev_kfree_skb(resp);
951
952 return rc;
953}
954
b1e666f5
WR		 955/*
956 * pn533_send_cmd_direct_async
957 *
958 * The function sends a piority cmd directly to the chip omiting the cmd
959 * queue. It's intended to be used by chaining mechanism of received responses
960 * where the host has to request every single chunk of data before scheduling
961 * next cmd from the queue.
962 */
963static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
964 struct sk_buff *req,
965 pn533_send_async_complete_t complete_cb,
966 void *complete_cb_context)
967{
b1e666f5 968 struct sk_buff *resp;
4231604b 969 struct pn533_cmd *cmd;
b1e666f5 970 int rc;
9e2d493e
WR		 971 int resp_len = dev->ops->rx_header_len +
972 dev->ops->max_payload_len +
973 dev->ops->rx_tail_len;
b1e666f5 974
b1e666f5
WR		 975 resp = alloc_skb(resp_len, GFP_KERNEL);
976 if (!resp)
977 return -ENOMEM;
978
4231604b
WR		 979 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
980 if (!cmd) {
b1e666f5
WR		 981 dev_kfree_skb(resp);
982 return -ENOMEM;
983 }
984
4b2a9532 985 cmd->code = cmd_code;
4231604b
WR		 986 cmd->req = req;
987 cmd->resp = resp;
988 cmd->resp_len = resp_len;
989 cmd->complete_cb = complete_cb;
990 cmd->complete_cb_context = complete_cb_context;
b1e666f5 991
9e2d493e 992 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 993
ddf19d20 994 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 995 if (rc < 0) {
996 dev_kfree_skb(resp);
4231604b 997 kfree(cmd);
2c206fb7
WR		 998 } else {
999 dev->cmd = cmd;
b1e666f5
WR		 1000 }
1001
1002 return rc;
1003}
1004
c79490e1
WR		 1005static void pn533_wq_cmd_complete(struct work_struct *work)
1006{
1007 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1008 int rc;
1009
1010 rc = pn533_send_async_complete(dev);
1011 if (rc != -EINPROGRESS)
1012 queue_work(dev->wq, &dev->cmd_work);
1013}
1014
5d50b364
SO		 1015static void pn533_wq_cmd(struct work_struct *work)
1016{
1017 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1018 struct pn533_cmd *cmd;
0ce1fbdd 1019 int rc;
5d50b364
SO		 1020
1021 mutex_lock(&dev->cmd_lock);
1022
1023 if (list_empty(&dev->cmd_queue)) {
1024 dev->cmd_pending = 0;
1025 mutex_unlock(&dev->cmd_lock);
1026 return;
1027 }
1028
1029 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1030
60ad07ab
SJ		 1031 list_del(&cmd->queue);
1032
5d50b364
SO		 1033 mutex_unlock(&dev->cmd_lock);
1034
ddf19d20 1035 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 1036 if (rc < 0) {
1037 dev_kfree_skb(cmd->req);
1038 dev_kfree_skb(cmd->resp);
4231604b 1039 kfree(cmd);
2c206fb7 1040 return;
0ce1fbdd 1041 }
2c206fb7
WR		 1042
1043 dev->cmd = cmd;
5d50b364
SO		 1044}
1045
c46ee386 1046struct pn533_sync_cmd_response {
94c5c156 1047 struct sk_buff *resp;
c46ee386
AAJ		 1048 struct completion done;
1049};
1050
94c5c156
WR		 1051static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1052 struct sk_buff *resp)
1053{
1054 struct pn533_sync_cmd_response *arg = _arg;
1055
94c5c156
WR		 1056 arg->resp = resp;
1057 complete(&arg->done);
1058
1059 return 0;
1060}
1061
1062/* pn533_send_cmd_sync
1063 *
1064 * Please note the req parameter is freed inside the function to
1065 * limit a number of return value interpretations by the caller.
1066 *
1067 * 1. negative in case of error during TX path -> req should be freed
1068 *
1069 * 2. negative in case of error during RX path -> req should not be freed
1070 * as it's been already freed at the begining of RX path by
1071 * async_complete_cb.
1072 *
1073 * 3. valid pointer in case of succesfult RX path
1074 *
1075 * A caller has to check a return value with IS_ERR macro. If the test pass,
1076 * the returned pointer is valid.
1077 *
1078 * */
1079static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1080 struct sk_buff *req)
1081{
1082 int rc;
1083 struct pn533_sync_cmd_response arg;
1084
94c5c156
WR		 1085 init_completion(&arg.done);
1086
1087 rc = pn533_send_cmd_async(dev, cmd_code, req,
1088 pn533_send_sync_complete, &arg);
1089 if (rc) {
1090 dev_kfree_skb(req);
1091 return ERR_PTR(rc);
1092 }
1093
1094 wait_for_completion(&arg.done);
1095
1096 return arg.resp;
1097}
1098
c46ee386
AAJ		 1099static void pn533_send_complete(struct urb *urb)
1100{
1101 struct pn533 *dev = urb->context;
1102
c46ee386
AAJ		 1103 switch (urb->status) {
1104 case 0:
f8f99171 1105 break; /* success */
c46ee386
AAJ		 1106 case -ECONNRESET:
1107 case -ENOENT:
6ca55372 1108 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 1109 "The urb has been stopped (status %d)",
1110 urb->status);
c46ee386 1111 break;
f8f99171 1112 case -ESHUTDOWN:
c46ee386 1113 default:
f8f99171
WR		 1114 nfc_dev_err(&dev->interface->dev,
1115 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 1116 }
1117}
1118
10cff29a
WR		 1119static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1120{
1121 /* ACR122U does not support any command which aborts last
1122 * issued command i.e. as ACK for standard PN533. Additionally,
1123 * it behaves stange, sending broken or incorrect responses,
1124 * when we cancel urb before the chip will send response.
1125 */
1126 if (dev->device_type == PN533_DEVICE_ACR122U)
1127 return;
1128
1129 /* An ack will cancel the last issued command */
1130 pn533_send_ack(dev, flags);
1131
1132 /* cancel the urb request */
1133 usb_kill_urb(dev->in_urb);
1134}
1135
9e2d493e 1136static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 1137{
1138 struct sk_buff *skb;
1139
9e2d493e 1140 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 1141 size +
9e2d493e 1142 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 1143
1144 if (skb)
9e2d493e 1145 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 1146
1147 return skb;
1148}
1149
c46ee386
AAJ		 1150struct pn533_target_type_a {
1151 __be16 sens_res;
1152 u8 sel_res;
1153 u8 nfcid_len;
1154 u8 nfcid_data[];
1155} __packed;
1156
1157
1158#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1159#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1160#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1161
1162#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1163#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1164
1165#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1166#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1167
1168#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1169#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1170#define PN533_TYPE_A_SEL_PROT_DEP 2
1171#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1172
1173static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1174 int target_data_len)
1175{
1176 u8 ssd;
1177 u8 platconf;
1178
1179 if (target_data_len < sizeof(struct pn533_target_type_a))
1180 return false;
1181
1182 /* The lenght check of nfcid[] and ats[] are not being performed because
1183 the values are not being used */
1184
1185 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1186 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1187 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1188
1189 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1190 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1191 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1192 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1193 return false;
1194
1195 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1196 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1197 return false;
1198
1199 return true;
1200}
1201
1202static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1203 int tgt_data_len)
1204{
1205 struct pn533_target_type_a *tgt_type_a;
1206
37cf4fc6 1207 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1208
1209 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1210 return -EPROTO;
1211
1212 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1213 case PN533_TYPE_A_SEL_PROT_MIFARE:
1214 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1215 break;
1216 case PN533_TYPE_A_SEL_PROT_ISO14443:
1217 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1218 break;
1219 case PN533_TYPE_A_SEL_PROT_DEP:
1220 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1221 break;
1222 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1223 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1224 NFC_PROTO_NFC_DEP_MASK;
1225 break;
1226 }
1227
1228 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1229 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1230 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1231 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1232
1233 return 0;
1234}
1235
1236struct pn533_target_felica {
1237 u8 pol_res;
1238 u8 opcode;
322bce95 1239 u8 nfcid2[NFC_NFCID2_MAXSIZE];
c46ee386
AAJ		 1240 u8 pad[8];
1241 /* optional */
1242 u8 syst_code[];
1243} __packed;
1244
1245#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1246#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1247
1248static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1249 int target_data_len)
1250{
1251 if (target_data_len < sizeof(struct pn533_target_felica))
1252 return false;
1253
1254 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1255 return false;
1256
1257 return true;
1258}
1259
1260static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1261 int tgt_data_len)
1262{
1263 struct pn533_target_felica *tgt_felica;
1264
37cf4fc6 1265 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1266
1267 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1268 return -EPROTO;
1269
5d467742
WR		 1270 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1271 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1272 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1273 else
1274 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1275
7975754f
SO		 1276 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1277 nfc_tgt->sensf_res_len = 9;
1278
322bce95
SO		 1279 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1280 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1281
c46ee386
AAJ		 1282 return 0;
1283}
1284
1285struct pn533_target_jewel {
1286 __be16 sens_res;
1287 u8 jewelid[4];
1288} __packed;
1289
1290static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1291 int target_data_len)
1292{
1293 u8 ssd;
1294 u8 platconf;
1295
1296 if (target_data_len < sizeof(struct pn533_target_jewel))
1297 return false;
1298
1299 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1300 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1301 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1302
1303 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1304 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1305 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1306 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1307 return false;
1308
1309 return true;
1310}
1311
1312static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1313 int tgt_data_len)
1314{
1315 struct pn533_target_jewel *tgt_jewel;
1316
37cf4fc6 1317 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1318
1319 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1320 return -EPROTO;
1321
1322 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1323 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1324 nfc_tgt->nfcid1_len = 4;
1325 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1326
1327 return 0;
1328}
1329
1330struct pn533_type_b_prot_info {
1331 u8 bitrate;
1332 u8 fsci_type;
1333 u8 fwi_adc_fo;
1334} __packed;
1335
1336#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1337#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1338#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1339
1340struct pn533_type_b_sens_res {
1341 u8 opcode;
1342 u8 nfcid[4];
1343 u8 appdata[4];
1344 struct pn533_type_b_prot_info prot_info;
1345} __packed;
1346
1347#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1348
1349struct pn533_target_type_b {
1350 struct pn533_type_b_sens_res sensb_res;
1351 u8 attrib_res_len;
1352 u8 attrib_res[];
1353} __packed;
1354
1355static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1356 int target_data_len)
1357{
1358 if (target_data_len < sizeof(struct pn533_target_type_b))
1359 return false;
1360
1361 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1362 return false;
1363
1364 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1365 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1366 return false;
1367
1368 return true;
1369}
1370
1371static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1372 int tgt_data_len)
1373{
1374 struct pn533_target_type_b *tgt_type_b;
1375
37cf4fc6 1376 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1377
1378 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1379 return -EPROTO;
1380
01d719a2 1381 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1382
1383 return 0;
1384}
1385
b5193e5d
WR		 1386static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1387 int tgdata_len)
c46ee386 1388{
c46ee386
AAJ		 1389 struct nfc_target nfc_tgt;
1390 int rc;
1391
1392 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1393 dev->poll_mod_curr);
c46ee386 1394
b5193e5d 1395 if (tg != 1)
c46ee386
AAJ		 1396 return -EPROTO;
1397
98b3ac1b
SO		 1398 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1399
c46ee386
AAJ		 1400 switch (dev->poll_mod_curr) {
1401 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1402 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1403 break;
1404 case PN533_POLL_MOD_212KBPS_FELICA:
1405 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1406 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1407 break;
1408 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1409 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1410 break;
1411 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1412 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1413 break;
1414 default:
b5193e5d
WR		 1415 nfc_dev_err(&dev->interface->dev,
1416 "Unknown current poll modulation");
c46ee386
AAJ		 1417 return -EPROTO;
1418 }
1419
1420 if (rc)
1421 return rc;
1422
1423 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1424 nfc_dev_dbg(&dev->interface->dev,
1425 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1426 return -EAGAIN;
1427 }
1428
b5193e5d
WR		 1429 nfc_dev_dbg(&dev->interface->dev,
1430 "Target found - supported protocols: 0x%x",
1431 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1432
1433 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1434
1435 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1436
1437 return 0;
1438}
1439
6fbbdc16
SO		 1440static inline void pn533_poll_next_mod(struct pn533 *dev)
1441{
1442 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1443}
1444
c46ee386
AAJ		 1445static void pn533_poll_reset_mod_list(struct pn533 *dev)
1446{
1447 dev->poll_mod_count = 0;
1448}
1449
1450static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1451{
1452 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1453 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1454 dev->poll_mod_count++;
1455}
1456
6fbbdc16
SO		 1457static void pn533_poll_create_mod_list(struct pn533 *dev,
1458 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1459{
1460 pn533_poll_reset_mod_list(dev);
1461
b08e8603
WR		 1462 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1463 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1464 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1465 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1466
b08e8603
WR		 1467 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1468 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1469 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1470 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1471 }
1472
6fbbdc16 1473 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1474 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1475
01d719a2 1476 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1477 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1478
6fbbdc16
SO		 1479 if (tm_protocols)
1480 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1481}
1482
b5193e5d 1483static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1484{
b5193e5d
WR		 1485 u8 nbtg, tg, *tgdata;
1486 int rc, tgdata_len;
c46ee386
AAJ		 1487
1488 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1489
b5193e5d
WR		 1490 nbtg = resp->data[0];
1491 tg = resp->data[1];
1492 tgdata = &resp->data[2];
1493 tgdata_len = resp->len - 2; /* nbtg + tg */
1494
1495 if (nbtg) {
1496 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1497
1498 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1499 if (rc == 0) {
1500 pn533_poll_reset_mod_list(dev);
1501 return 0;
1502 }
c46ee386
AAJ		 1503 }
1504
6fbbdc16 1505 return -EAGAIN;
c46ee386
AAJ		 1506}
1507
9e2d493e 1508static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1509{
b5193e5d
WR		 1510 struct sk_buff *skb;
1511 u8 *felica, *nfcid3, *gb;
1512
9e2d493e
WR		 1513 u8 *gbytes = dev->gb;
1514 size_t gbytes_len = dev->gb_len;
1515
51d9e803
SO		 1516 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1517 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1518 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1519 0xff, 0xff}; /* System code */
b5193e5d 1520
51d9e803
SO		 1521 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1522 0x0, 0x0, 0x0,
1523 0x40}; /* SEL_RES for DEP */
ad3823ce 1524
b5193e5d
WR		 1525 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1526 felica (18), nfcid3 (10), gb_len (1) */
1527 gbytes_len +
1528 1; /* len Tk*/
ad3823ce 1529
9e2d493e 1530 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1531 if (!skb)
1532 return NULL;
ad3823ce
SO		 1533
1534 /* DEP support only */
52f2eaee 1535 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1536
1537 /* MIFARE params */
1538 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1539
1540 /* Felica params */
b5193e5d
WR		 1541 felica = skb_put(skb, 18);
1542 memcpy(felica, felica_params, 18);
1543 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1544
1545 /* NFCID3 */
b5193e5d
WR		 1546 nfcid3 = skb_put(skb, 10);
1547 memset(nfcid3, 0, 10);
1548 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1549
1550 /* General bytes */
b5193e5d 1551 *skb_put(skb, 1) = gbytes_len;
51d9e803 1552
b5193e5d
WR		 1553 gb = skb_put(skb, gbytes_len);
1554 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1555
b5193e5d
WR		 1556 /* Len Tk */
1557 *skb_put(skb, 1) = 0;
51d9e803 1558
b5193e5d 1559 return skb;
ad3823ce
SO		 1560}
1561
b1bb290a 1562#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1563#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1564static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1565 struct sk_buff *resp)
103b34cf 1566{
e4878823 1567 u8 status;
103b34cf
SO		 1568
1569 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1570
e4878823
WR		 1571 if (IS_ERR(resp))
1572 return PTR_ERR(resp);
103b34cf 1573
e4878823
WR		 1574 status = resp->data[0];
1575 skb_pull(resp, sizeof(status));
103b34cf 1576
e4878823 1577 if (status != 0) {
103b34cf 1578 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1579 dev->tgt_mode = 0;
e4878823 1580 dev_kfree_skb(resp);
103b34cf
SO		 1581 return 0;
1582 }
1583
e4878823 1584 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1585}
1586
1587static void pn533_wq_tg_get_data(struct work_struct *work)
1588{
1589 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1590
e4878823
WR		 1591 struct sk_buff *skb;
1592 int rc;
103b34cf 1593
e4878823 1594 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1595
9e2d493e 1596 skb = pn533_alloc_skb(dev, 0);
e4878823 1597 if (!skb)
103b34cf
SO		 1598 return;
1599
e4878823
WR		 1600 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1601 pn533_tm_get_data_complete, NULL);
103b34cf 1602
e4878823
WR		 1603 if (rc < 0)
1604 dev_kfree_skb(skb);
103b34cf
SO		 1605
1606 return;
1607}
1608
fc40a8c1 1609#define ATR_REQ_GB_OFFSET 17
b5193e5d 1610static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1611{
b5193e5d 1612 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1613 size_t gb_len;
103b34cf 1614 int rc;
ad3823ce
SO		 1615
1616 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1617
b5193e5d 1618 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1619 return -EINVAL;
1620
b5193e5d
WR		 1621 mode = resp->data[0];
1622 cmd = &resp->data[1];
ad3823ce 1623
b5193e5d
WR		 1624 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1625 mode, resp->len);
ad3823ce 1626
b5193e5d
WR		 1627 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1628 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1629 comm_mode = NFC_COMM_ACTIVE;
1630
b5193e5d 1631 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1632 return -EOPNOTSUPP;
1633
b5193e5d
WR		 1634 gb = cmd + ATR_REQ_GB_OFFSET;
1635 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1636
103b34cf
SO		 1637 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1638 comm_mode, gb, gb_len);
1639 if (rc < 0) {
1640 nfc_dev_err(&dev->interface->dev,
1641 "Error when signaling target activation");
1642 return rc;
1643 }
1644
51ad304c 1645 dev->tgt_mode = 1;
103b34cf
SO		 1646 queue_work(dev->wq, &dev->tg_work);
1647
1648 return 0;
fe7c5800
SO		 1649}
1650
6fbbdc16 1651static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1652{
37cf4fc6 1653 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1654
1655 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1656
6fbbdc16
SO		 1657 dev->cancel_listen = 1;
1658
6fbbdc16
SO		 1659 pn533_poll_next_mod(dev);
1660
1661 queue_work(dev->wq, &dev->poll_work);
1662}
1663
17e9d9d4
SO		 1664static int pn533_rf_complete(struct pn533 *dev, void *arg,
1665 struct sk_buff *resp)
1666{
1667 int rc = 0;
1668
1669 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1670
1671 if (IS_ERR(resp)) {
1672 rc = PTR_ERR(resp);
1673
1674 nfc_dev_err(&dev->interface->dev, "%s RF setting error %d",
1675 __func__, rc);
1676
1677 return rc;
1678 }
1679
1680 queue_work(dev->wq, &dev->poll_work);
1681
1682 dev_kfree_skb(resp);
1683 return rc;
1684}
1685
1686static void pn533_wq_rf(struct work_struct *work)
1687{
1688 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1689 struct sk_buff *skb;
1690 int rc;
1691
1692 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1693
1694 skb = pn533_alloc_skb(dev, 2);
1695 if (!skb)
1696 return;
1697
1698 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
1699 *skb_put(skb, 1) = 0;
1700
1701 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1702 pn533_rf_complete, NULL);
1703 if (rc < 0) {
1704 dev_kfree_skb(skb);
1705 nfc_dev_err(&dev->interface->dev, "RF setting error %d", rc);
1706 }
1707
1708 return;
1709}
1710
6fbbdc16 1711static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1712 struct sk_buff *resp)
6fbbdc16
SO		 1713{
1714 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1715 int rc;
1716
6fbbdc16 1717 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1718
b5193e5d
WR		 1719 if (IS_ERR(resp)) {
1720 rc = PTR_ERR(resp);
1721
1722 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1723 __func__, rc);
1724
1725 if (rc == -ENOENT) {
1726 if (dev->poll_mod_count != 0)
1727 return rc;
1728 else
1729 goto stop_poll;
1730 } else if (rc < 0) {
1731 nfc_dev_err(&dev->interface->dev,
1732 "Error %d when running poll", rc);
1733 goto stop_poll;
1734 }
6fbbdc16 1735 }
ad3823ce 1736
6fbbdc16
SO		 1737 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1738
b5193e5d 1739 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1740 del_timer(&dev->listen_timer);
b5193e5d
WR		 1741 rc = pn533_init_target_complete(dev, resp);
1742 goto done;
6fbbdc16
SO		 1743 }
1744
b5193e5d
WR		 1745 /* Initiator mode */
1746 rc = pn533_start_poll_complete(dev, resp);
1747 if (!rc)
1748 goto done;
6fbbdc16 1749
95cb9e10 1750 if (!dev->poll_mod_count) {
8b513d0c 1751 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
95cb9e10
WR		 1752 goto done;
1753 }
1754
b5193e5d 1755 pn533_poll_next_mod(dev);
17e9d9d4
SO		 1756 /* Not target found, turn radio off */
1757 queue_work(dev->wq, &dev->rf_work);
6fbbdc16 1758
b5193e5d
WR		 1759done:
1760 dev_kfree_skb(resp);
1761 return rc;
6fbbdc16
SO		 1762
1763stop_poll:
b5193e5d
WR		 1764 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1765
6fbbdc16
SO		 1766 pn533_poll_reset_mod_list(dev);
1767 dev->poll_protocols = 0;
b5193e5d 1768 return rc;
ad3823ce
SO		 1769}
1770
9e2d493e
WR		 1771static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1772 struct pn533_poll_modulations *mod)
c46ee386 1773{
b5193e5d 1774 struct sk_buff *skb;
c46ee386 1775
9e2d493e 1776 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1777 if (!skb)
1778 return NULL;
c46ee386 1779
b5193e5d 1780 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1781
b5193e5d 1782 return skb;
6fbbdc16 1783}
c46ee386 1784
6fbbdc16
SO		 1785static int pn533_send_poll_frame(struct pn533 *dev)
1786{
b5193e5d
WR		 1787 struct pn533_poll_modulations *mod;
1788 struct sk_buff *skb;
6fbbdc16 1789 int rc;
b5193e5d 1790 u8 cmd_code;
c46ee386 1791
b5193e5d 1792 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1793
b5193e5d
WR		 1794 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1795 __func__, mod->len);
c46ee386 1796
b5193e5d
WR		 1797 if (mod->len == 0) { /* Listen mode */
1798 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1799 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1800 } else { /* Polling mode */
1801 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1802 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1803 }
1804
1805 if (!skb) {
1806 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1807 return -ENOMEM;
1808 }
1809
1810 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1811 NULL);
1812 if (rc < 0) {
1813 dev_kfree_skb(skb);
6fbbdc16 1814 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1815 }
c46ee386 1816
6fbbdc16
SO		 1817 return rc;
1818}
1819
1820static void pn533_wq_poll(struct work_struct *work)
1821{
1822 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1823 struct pn533_poll_modulations *cur_mod;
1824 int rc;
1825
1826 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1827
1828 nfc_dev_dbg(&dev->interface->dev,
1829 "%s cancel_listen %d modulation len %d",
1830 __func__, dev->cancel_listen, cur_mod->len);
1831
1832 if (dev->cancel_listen == 1) {
1833 dev->cancel_listen = 0;
10cff29a 1834 pn533_abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1835 }
1836
6fbbdc16
SO		 1837 rc = pn533_send_poll_frame(dev);
1838 if (rc)
1839 return;
c46ee386 1840
6fbbdc16
SO		 1841 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1842 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1843
6fbbdc16 1844 return;
c46ee386
AAJ		 1845}
1846
fe7c5800
SO		 1847static int pn533_start_poll(struct nfc_dev *nfc_dev,
1848 u32 im_protocols, u32 tm_protocols)
1849{
1850 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1851
1852 nfc_dev_dbg(&dev->interface->dev,
1853 "%s: im protocols 0x%x tm protocols 0x%x",
1854 __func__, im_protocols, tm_protocols);
1855
1856 if (dev->tgt_active_prot) {
1857 nfc_dev_err(&dev->interface->dev,
1858 "Cannot poll with a target already activated");
1859 return -EBUSY;
1860 }
1861
51ad304c
SO		 1862 if (dev->tgt_mode) {
1863 nfc_dev_err(&dev->interface->dev,
1864 "Cannot poll while already being activated");
1865 return -EBUSY;
1866 }
1867
6fbbdc16
SO		 1868 if (tm_protocols) {
1869 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1870 if (dev->gb == NULL)
1871 tm_protocols = 0;
1872 }
ad3823ce 1873
6fbbdc16
SO		 1874 dev->poll_mod_curr = 0;
1875 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1876 dev->poll_protocols = im_protocols;
1877 dev->listen_protocols = tm_protocols;
ad3823ce 1878
6fbbdc16 1879 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1880}
1881
c46ee386
AAJ		 1882static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1883{
1884 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1885
1886 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1887
6fbbdc16
SO		 1888 del_timer(&dev->listen_timer);
1889
c46ee386 1890 if (!dev->poll_mod_count) {
6ca55372
WR		 1891 nfc_dev_dbg(&dev->interface->dev,
1892 "Polling operation was not running");
c46ee386
AAJ		 1893 return;
1894 }
1895
10cff29a 1896 pn533_abort_cmd(dev, GFP_KERNEL);
7c2a04a9 1897 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1898}
1899
1900static int pn533_activate_target_nfcdep(struct pn533 *dev)
1901{
cb950d93 1902 struct pn533_cmd_activate_response *rsp;
541d920b 1903 u16 gt_len;
c46ee386
AAJ		 1904 int rc;
1905
cb950d93
WR		 1906 struct sk_buff *skb;
1907 struct sk_buff *resp;
c46ee386 1908
cb950d93 1909 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1910
9e2d493e 1911 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1912 if (!skb)
1913 return -ENOMEM;
c46ee386 1914
cb950d93
WR		 1915 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1916 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1917
cb950d93
WR		 1918 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1919 if (IS_ERR(resp))
1920 return PTR_ERR(resp);
c46ee386 1921
37cf4fc6 1922 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1923 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1924 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1925 nfc_dev_err(&dev->interface->dev,
1926 "Target activation failed (error 0x%x)", rc);
cb950d93 1927 dev_kfree_skb(resp);
c46ee386 1928 return -EIO;
8a0ecfe7 1929 }
c46ee386 1930
541d920b 1931 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1932 gt_len = resp->len - 16;
1933 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1934
cb950d93 1935 dev_kfree_skb(resp);
541d920b 1936 return rc;
c46ee386
AAJ		 1937}
1938
90099433
EL		 1939static int pn533_activate_target(struct nfc_dev *nfc_dev,
1940 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1941{
1942 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1943 int rc;
1944
1945 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1946 protocol);
c46ee386
AAJ		 1947
1948 if (dev->poll_mod_count) {
6ca55372
WR		 1949 nfc_dev_err(&dev->interface->dev,
1950 "Cannot activate while polling");
c46ee386
AAJ		 1951 return -EBUSY;
1952 }
1953
1954 if (dev->tgt_active_prot) {
6ca55372
WR		 1955 nfc_dev_err(&dev->interface->dev,
1956 "There is already an active target");
c46ee386
AAJ		 1957 return -EBUSY;
1958 }
1959
1960 if (!dev->tgt_available_prots) {
6ca55372
WR		 1961 nfc_dev_err(&dev->interface->dev,
1962 "There is no available target to activate");
c46ee386
AAJ		 1963 return -EINVAL;
1964 }
1965
1966 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1967 nfc_dev_err(&dev->interface->dev,
1968 "Target doesn't support requested proto %u",
1969 protocol);
c46ee386
AAJ		 1970 return -EINVAL;
1971 }
1972
1973 if (protocol == NFC_PROTO_NFC_DEP) {
1974 rc = pn533_activate_target_nfcdep(dev);
1975 if (rc) {
6ca55372
WR		 1976 nfc_dev_err(&dev->interface->dev,
1977 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1978 return rc;
1979 }
1980 }
1981
1982 dev->tgt_active_prot = protocol;
1983 dev->tgt_available_prots = 0;
1984
1985 return 0;
1986}
1987
90099433
EL		 1988static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1989 struct nfc_target *target)
c46ee386
AAJ		 1990{
1991 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1992
1993 struct sk_buff *skb;
1994 struct sk_buff *resp;
1995
c46ee386
AAJ		 1996 int rc;
1997
1998 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1999
2000 if (!dev->tgt_active_prot) {
2001 nfc_dev_err(&dev->interface->dev, "There is no active target");
2002 return;
2003 }
2004
2005 dev->tgt_active_prot = 0;
6ff73fd2
SO		 2006 skb_queue_purge(&dev->resp_q);
2007
9e2d493e 2008 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2009 if (!skb)
2010 return;
c46ee386 2011
cb950d93 2012 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 2013
cb950d93
WR		 2014 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2015 if (IS_ERR(resp))
c46ee386 2016 return;
c46ee386 2017
cb950d93 2018 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 2019 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 2020 nfc_dev_err(&dev->interface->dev,
2021 "Error 0x%x when releasing the target", rc);
c46ee386 2022
cb950d93 2023 dev_kfree_skb(resp);
c46ee386
AAJ		 2024 return;
2025}
2026
361f3cb7
SO		 2027
2028static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 2029 struct sk_buff *resp)
361f3cb7 2030{
13003649 2031 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 2032 u8 target_gt_len;
2033 int rc;
13003649 2034 u8 active = *(u8 *)arg;
70418e6e
WR		 2035
2036 kfree(arg);
361f3cb7 2037
13003649
WR		 2038 if (IS_ERR(resp))
2039 return PTR_ERR(resp);
361f3cb7
SO		 2040
2041 if (dev->tgt_available_prots &&
2042 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2043 nfc_dev_err(&dev->interface->dev,
5d467742 2044 "The target does not support DEP");
13003649
WR		 2045 rc = -EINVAL;
2046 goto error;
361f3cb7
SO		 2047 }
2048
13003649
WR		 2049 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2050
2051 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 2052 if (rc != PN533_CMD_RET_SUCCESS) {
2053 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2054 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 2055 goto error;
361f3cb7
SO		 2056 }
2057
2058 if (!dev->tgt_available_prots) {
13003649
WR		 2059 struct nfc_target nfc_target;
2060
361f3cb7
SO		 2061 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2062
2063 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 2064 nfc_target.nfcid1_len = 10;
13003649 2065 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 2066 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2067 if (rc)
13003649 2068 goto error;
361f3cb7
SO		 2069
2070 dev->tgt_available_prots = 0;
2071 }
2072
2073 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2074
2075 /* ATR_RES general bytes are located at offset 17 */
13003649 2076 target_gt_len = resp->len - 17;
361f3cb7 2077 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 2078 rsp->gt, target_gt_len);
361f3cb7
SO		 2079 if (rc == 0)
2080 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 2081 dev->nfc_dev->targets[0].idx,
2082 !active, NFC_RF_INITIATOR);
361f3cb7 2083
13003649
WR		 2084error:
2085 dev_kfree_skb(resp);
2086 return rc;
361f3cb7
SO		 2087}
2088
17e9d9d4 2089static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
d7f3345d 2090#define PASSIVE_DATA_LEN 5
90099433 2091static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 2092 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 2093{
2094 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649 2095 struct sk_buff *skb;
5eef4845
SO		 2096 int rc, skb_len;
2097 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
13003649 2098
d7f3345d 2099 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 2100
2101 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2102
361f3cb7
SO		 2103 if (dev->poll_mod_count) {
2104 nfc_dev_err(&dev->interface->dev,
5d467742 2105 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 2106 return -EBUSY;
2107 }
2108
2109 if (dev->tgt_active_prot) {
2110 nfc_dev_err(&dev->interface->dev,
5d467742 2111 "There is already an active target");
361f3cb7
SO		 2112 return -EBUSY;
2113 }
2114
13003649 2115 skb_len = 3 + gb_len; /* ActPass + BR + Next */
5eef4845 2116 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2117
5eef4845
SO		 2118 /* NFCID3 */
2119 skb_len += NFC_NFCID3_MAXSIZE;
2120 if (target && !target->nfcid2_len) {
2121 nfcid3[0] = 0x1;
2122 nfcid3[1] = 0xfe;
2123 get_random_bytes(nfcid3 + 2, 6);
2124 }
322bce95 2125
9e2d493e 2126 skb = pn533_alloc_skb(dev, skb_len);
13003649 2127 if (!skb)
361f3cb7
SO		 2128 return -ENOMEM;
2129
13003649 2130 *skb_put(skb, 1) = !comm_mode; /* ActPass */
5eef4845 2131 *skb_put(skb, 1) = 0x02; /* 424 kbps */
13003649
WR		 2132
2133 next = skb_put(skb, 1); /* Next */
2134 *next = 0;
361f3cb7 2135
5eef4845
SO		 2136 /* Copy passive data */
2137 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2138 *next |= 1;
d7f3345d 2139
5eef4845
SO		 2140 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2141 if (target && target->nfcid2_len)
322bce95
SO		 2142 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2143 target->nfcid2_len);
5eef4845
SO		 2144 else
2145 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2146 NFC_NFCID3_MAXSIZE);
2147 *next |= 2;
322bce95 2148
47807d3d 2149 if (gb != NULL && gb_len > 0) {
13003649
WR		 2150 memcpy(skb_put(skb, gb_len), gb, gb_len);
2151 *next |= 4; /* We have some Gi */
361f3cb7 2152 } else {
13003649 2153 *next = 0;
361f3cb7
SO		 2154 }
2155
13003649
WR		 2156 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2157 if (!arg) {
2158 dev_kfree_skb(skb);
2159 return -ENOMEM;
2160 }
361f3cb7 2161
13003649 2162 *arg = !comm_mode;
361f3cb7 2163
17e9d9d4
SO		 2164 pn533_rf_field(dev->nfc_dev, 0);
2165
13003649
WR		 2166 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2167 pn533_in_dep_link_up_complete, arg);
2168
2169 if (rc < 0) {
2170 dev_kfree_skb(skb);
2171 kfree(arg);
2172 }
361f3cb7
SO		 2173
2174 return rc;
2175}
2176
2177static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2178{
6fbbdc16
SO		 2179 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2180
fcfafc76
WR		 2181 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2182
6fbbdc16
SO		 2183 pn533_poll_reset_mod_list(dev);
2184
10cff29a
WR		 2185 if (dev->tgt_mode || dev->tgt_active_prot)
2186 pn533_abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 2187
2188 dev->tgt_active_prot = 0;
2189 dev->tgt_mode = 0;
2190
2191 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2192
2193 return 0;
2194}
2195
c46ee386 2196struct pn533_data_exchange_arg {
c46ee386
AAJ		 2197 data_exchange_cb_t cb;
2198 void *cb_context;
2199};
2200
6ff73fd2
SO		 2201static struct sk_buff *pn533_build_response(struct pn533 *dev)
2202{
2203 struct sk_buff *skb, *tmp, *t;
2204 unsigned int skb_len = 0, tmp_len = 0;
2205
fcfafc76 2206 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2207
2208 if (skb_queue_empty(&dev->resp_q))
2209 return NULL;
2210
2211 if (skb_queue_len(&dev->resp_q) == 1) {
2212 skb = skb_dequeue(&dev->resp_q);
2213 goto out;
2214 }
2215
2216 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2217 skb_len += tmp->len;
2218
2219 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2220 __func__, skb_len);
2221
2222 skb = alloc_skb(skb_len, GFP_KERNEL);
2223 if (skb == NULL)
2224 goto out;
2225
2226 skb_put(skb, skb_len);
2227
2228 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2229 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2230 tmp_len += tmp->len;
2231 }
2232
2233out:
2234 skb_queue_purge(&dev->resp_q);
2235
2236 return skb;
2237}
2238
c46ee386 2239static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2240 struct sk_buff *resp)
c46ee386
AAJ		 2241{
2242 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2243 struct sk_buff *skb;
2244 int rc = 0;
2245 u8 status, ret, mi;
c46ee386
AAJ		 2246
2247 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2248
b1e666f5
WR		 2249 if (IS_ERR(resp)) {
2250 rc = PTR_ERR(resp);
2251 goto _error;
c46ee386
AAJ		 2252 }
2253
b1e666f5
WR		 2254 status = resp->data[0];
2255 ret = status & PN533_CMD_RET_MASK;
2256 mi = status & PN533_CMD_MI_MASK;
2257
2258 skb_pull(resp, sizeof(status));
c46ee386 2259
b1e666f5
WR		 2260 if (ret != PN533_CMD_RET_SUCCESS) {
2261 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2262 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2263 rc = -EIO;
c46ee386
AAJ		 2264 goto error;
2265 }
2266
b1e666f5 2267 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2268
b1e666f5
WR		 2269 if (mi) {
2270 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2271 queue_work(dev->wq, &dev->mi_work);
2272 return -EINPROGRESS;
c46ee386
AAJ		 2273 }
2274
6ff73fd2 2275 skb = pn533_build_response(dev);
b1e666f5 2276 if (!skb)
6ff73fd2 2277 goto error;
c46ee386 2278
6ff73fd2 2279 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2280 kfree(arg);
2281 return 0;
2282
2283error:
b1e666f5
WR		 2284 dev_kfree_skb(resp);
2285_error:
6ff73fd2 2286 skb_queue_purge(&dev->resp_q);
b1e666f5 2287 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2288 kfree(arg);
b1e666f5 2289 return rc;
c46ee386
AAJ		 2290}
2291
be9ae4ce
SO		 2292static int pn533_transceive(struct nfc_dev *nfc_dev,
2293 struct nfc_target *target, struct sk_buff *skb,
2294 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2295{
2296 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2297 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2298 int rc;
2299
2300 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2301
b1e666f5
WR		 2302 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2303 /* TODO: Implement support to multi-part data exchange */
2304 nfc_dev_err(&dev->interface->dev,
2305 "Data length greater than the max allowed: %d",
2306 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2307 rc = -ENOSYS;
2308 goto error;
2309 }
2310
c46ee386 2311 if (!dev->tgt_active_prot) {
6ca55372
WR		 2312 nfc_dev_err(&dev->interface->dev,
2313 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2314 rc = -EINVAL;
2315 goto error;
2316 }
2317
b1e666f5 2318 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2319 if (!arg) {
2320 rc = -ENOMEM;
b1e666f5 2321 goto error;
c46ee386
AAJ		 2322 }
2323
c46ee386
AAJ		 2324 arg->cb = cb;
2325 arg->cb_context = cb_context;
2326
b1e666f5
WR		 2327 switch (dev->device_type) {
2328 case PN533_DEVICE_PASORI:
2329 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2330 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2331 skb,
2332 pn533_data_exchange_complete,
2333 arg);
2334
2335 break;
2336 }
2337 default:
2338 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2339
2340 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2341 skb, pn533_data_exchange_complete,
2342 arg);
2343
2344 break;
c46ee386
AAJ		 2345 }
2346
b1e666f5
WR		 2347 if (rc < 0) /* rc from send_async */
2348 goto error;
2349
c46ee386
AAJ		 2350 return 0;
2351
c46ee386 2352error:
b1e666f5
WR		 2353 kfree(arg);
2354 dev_kfree_skb(skb);
c46ee386
AAJ		 2355 return rc;
2356}
2357
dadb06f2 2358static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2359 struct sk_buff *resp)
dadb06f2 2360{
e4878823 2361 u8 status;
5b412fd1 2362
dadb06f2
SO		 2363 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2364
e4878823
WR		 2365 if (IS_ERR(resp))
2366 return PTR_ERR(resp);
5b412fd1 2367
e4878823 2368 status = resp->data[0];
dadb06f2 2369
e4878823 2370 dev_kfree_skb(resp);
dadb06f2 2371
e4878823 2372 if (status != 0) {
dadb06f2
SO		 2373 nfc_tm_deactivated(dev->nfc_dev);
2374
51ad304c
SO		 2375 dev->tgt_mode = 0;
2376
dadb06f2
SO		 2377 return 0;
2378 }
2379
2380 queue_work(dev->wq, &dev->tg_work);
2381
2382 return 0;
2383}
2384
2385static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2386{
2387 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2388 int rc;
2389
2390 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2391
e4878823 2392 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2393 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2394 "Data length greater than the max allowed: %d",
2395 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2396 return -ENOSYS;
dadb06f2
SO		 2397 }
2398
e4878823
WR		 2399 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2400 pn533_tm_send_complete, NULL);
2401 if (rc < 0)
2402 dev_kfree_skb(skb);
dadb06f2
SO		 2403
2404 return rc;
2405}
2406
6ff73fd2
SO		 2407static void pn533_wq_mi_recv(struct work_struct *work)
2408{
2409 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2410
2411 struct sk_buff *skb;
6ff73fd2
SO		 2412 int rc;
2413
2414 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2415
9e2d493e 2416 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2417 if (!skb)
2418 goto error;
6ff73fd2 2419
b1e666f5
WR		 2420 switch (dev->device_type) {
2421 case PN533_DEVICE_PASORI:
2422 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2423 rc = pn533_send_cmd_direct_async(dev,
2424 PN533_CMD_IN_COMM_THRU,
2425 skb,
2426 pn533_data_exchange_complete,
2427 dev->cmd_complete_mi_arg);
6ff73fd2 2428
b1e666f5
WR		 2429 break;
2430 }
2431 default:
2432 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2433
b1e666f5
WR		 2434 rc = pn533_send_cmd_direct_async(dev,
2435 PN533_CMD_IN_DATA_EXCHANGE,
2436 skb,
2437 pn533_data_exchange_complete,
2438 dev->cmd_complete_mi_arg);
b1bb290a 2439
b1e666f5 2440 break;
6ff73fd2
SO		 2441 }
2442
b1e666f5 2443 if (rc == 0) /* success */
6ff73fd2
SO		 2444 return;
2445
b1e666f5
WR		 2446 nfc_dev_err(&dev->interface->dev,
2447 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2448
b1e666f5 2449 dev_kfree_skb(skb);
140ef7f6 2450 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2451
b1e666f5 2452error:
6ff73fd2 2453 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2454 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2455}
2456
c46ee386
AAJ		 2457static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2458 u8 cfgdata_len)
2459{
cb950d93
WR		 2460 struct sk_buff *skb;
2461 struct sk_buff *resp;
2462
2463 int skb_len;
c46ee386
AAJ		 2464
2465 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2466
cb950d93 2467 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2468
9e2d493e 2469 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2470 if (!skb)
2471 return -ENOMEM;
c46ee386 2472
cb950d93
WR		 2473 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2474 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2475
cb950d93
WR		 2476 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2477 if (IS_ERR(resp))
2478 return PTR_ERR(resp);
c46ee386 2479
cb950d93
WR		 2480 dev_kfree_skb(resp);
2481 return 0;
2482}
2483
2484static int pn533_get_firmware_version(struct pn533 *dev,
2485 struct pn533_fw_version *fv)
2486{
2487 struct sk_buff *skb;
2488 struct sk_buff *resp;
2489
9e2d493e 2490 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2491 if (!skb)
2492 return -ENOMEM;
2493
2494 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2495 if (IS_ERR(resp))
2496 return PTR_ERR(resp);
2497
2498 fv->ic = resp->data[0];
2499 fv->ver = resp->data[1];
2500 fv->rev = resp->data[2];
2501 fv->support = resp->data[3];
2502
2503 dev_kfree_skb(resp);
2504 return 0;
c46ee386
AAJ		 2505}
2506
f75c2913 2507static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2508{
cb950d93
WR		 2509 struct sk_buff *skb;
2510 struct sk_buff *resp;
5c7b0531
SO		 2511
2512 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2513
9e2d493e 2514 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2515 if (!skb)
2516 return -ENOMEM;
5c7b0531 2517
cb950d93 2518 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2519
cb950d93
WR		 2520 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2521 if (IS_ERR(resp))
2522 return PTR_ERR(resp);
5c7b0531 2523
cb950d93 2524 dev_kfree_skb(resp);
5c7b0531 2525
94c5c156 2526 return 0;
5c7b0531
SO		 2527}
2528
53cf4839
WR		 2529struct pn533_acr122_poweron_rdr_arg {
2530 int rc;
2531 struct completion done;
2532};
2533
2534static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2535{
2536 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2537
2538 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2539
86eca4e7 2540 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2541 urb->transfer_buffer, urb->transfer_buffer_length,
2542 false);
2543
2544 arg->rc = urb->status;
2545 complete(&arg->done);
2546}
2547
2548static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2549{
2550 /* Power on th reader (CCID cmd) */
2551 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2552 0, 0, 0, 0, 0, 0, 3, 0, 0};
2553 u8 buf[255];
2554 int rc;
2555 void *cntx;
2556 struct pn533_acr122_poweron_rdr_arg arg;
2557
2558 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2559
2560 init_completion(&arg.done);
2561 cntx = dev->in_urb->context; /* backup context */
2562
2563 dev->in_urb->transfer_buffer = buf;
2564 dev->in_urb->transfer_buffer_length = 255;
2565 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2566 dev->in_urb->context = &arg;
2567
2568 dev->out_urb->transfer_buffer = cmd;
2569 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2570
86eca4e7 2571 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2572 cmd, sizeof(cmd), false);
2573
2574 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2575 if (rc) {
2576 nfc_dev_err(&dev->interface->dev,
2577 "Reader power on cmd error %d", rc);
2578 return rc;
2579 }
2580
2581 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2582 if (rc) {
2583 nfc_dev_err(&dev->interface->dev,
2584 "Can't submit for reader power on cmd response %d",
2585 rc);
2586 return rc;
2587 }
2588
2589 wait_for_completion(&arg.done);
2590 dev->in_urb->context = cntx; /* restore context */
2591
2592 return arg.rc;
2593}
2594
60d9edd5
SO		 2595static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2596{
2597 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2598 u8 rf_field = !!rf;
2599 int rc;
2600
2601 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2602 (u8 *)&rf_field, 1);
2603 if (rc) {
2604 nfc_dev_err(&dev->interface->dev,
2605 "Error on setting RF field");
2606 return rc;
2607 }
2608
2609 return rc;
2610}
2611
2612int pn533_dev_up(struct nfc_dev *nfc_dev)
2613{
2614 return pn533_rf_field(nfc_dev, 1);
2615}
2616
2617int pn533_dev_down(struct nfc_dev *nfc_dev)
2618{
2619 return pn533_rf_field(nfc_dev, 0);
2620}
2621
5c7b0531 2622static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2623 .dev_up = pn533_dev_up,
2624 .dev_down = pn533_dev_down,
361f3cb7
SO		 2625 .dep_link_up = pn533_dep_link_up,
2626 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2627 .start_poll = pn533_start_poll,
2628 .stop_poll = pn533_stop_poll,
2629 .activate_target = pn533_activate_target,
2630 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2631 .im_transceive = pn533_transceive,
dadb06f2 2632 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2633};
2634
5c7b0531
SO		 2635static int pn533_setup(struct pn533 *dev)
2636{
2637 struct pn533_config_max_retries max_retries;
2638 struct pn533_config_timing timing;
2639 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2640 int rc;
2641
2642 switch (dev->device_type) {
2643 case PN533_DEVICE_STD:
5c7b0531 2644 case PN533_DEVICE_PASORI:
53cf4839 2645 case PN533_DEVICE_ACR122U:
5c7b0531
SO		 2646 max_retries.mx_rty_atr = 0x2;
2647 max_retries.mx_rty_psl = 0x1;
2648 max_retries.mx_rty_passive_act =
2649 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2650
2651 timing.rfu = PN533_CONFIG_TIMING_102;
2652 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2653 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2654
2655 break;
2656
2657 default:
2658 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2659 dev->device_type);
2660 return -EINVAL;
2661 }
2662
2663 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2664 (u8 *)&max_retries, sizeof(max_retries));
2665 if (rc) {
2666 nfc_dev_err(&dev->interface->dev,
2667 "Error on setting MAX_RETRIES config");
2668 return rc;
2669 }
2670
2671
2672 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2673 (u8 *)&timing, sizeof(timing));
2674 if (rc) {
2675 nfc_dev_err(&dev->interface->dev,
2676 "Error on setting RF timings");
2677 return rc;
2678 }
2679
2680 switch (dev->device_type) {
2681 case PN533_DEVICE_STD:
2682 break;
2683
2684 case PN533_DEVICE_PASORI:
f75c2913 2685 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2686
2687 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2688 pasori_cfg, 3);
2689 if (rc) {
2690 nfc_dev_err(&dev->interface->dev,
2691 "Error while settings PASORI config");
2692 return rc;
2693 }
2694
f75c2913 2695 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2696
2697 break;
2698 }
2699
2700 return 0;
2701}
2702
c46ee386
AAJ		 2703static int pn533_probe(struct usb_interface *interface,
2704 const struct usb_device_id *id)
2705{
cb950d93 2706 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2707 struct pn533 *dev;
2708 struct usb_host_interface *iface_desc;
2709 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2710 int in_endpoint = 0;
2711 int out_endpoint = 0;
2712 int rc = -ENOMEM;
2713 int i;
2714 u32 protocols;
2715
2716 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2717 if (!dev)
2718 return -ENOMEM;
2719
2720 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2721 dev->interface = interface;
0201ed03 2722 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2723
2724 iface_desc = interface->cur_altsetting;
2725 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2726 endpoint = &iface_desc->endpoint[i].desc;
2727
8d25ca79 2728 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2729 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2730
8d25ca79 2731 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2732 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2733 }
2734
2735 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2736 nfc_dev_err(&interface->dev,
2737 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2738 rc = -ENODEV;
2739 goto error;
2740 }
2741
c46ee386 2742 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2743 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2744
a5798094 2745 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2746 goto error;
2747
2748 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2749 usb_rcvbulkpipe(dev->udev, in_endpoint),
2750 NULL, 0, NULL, dev);
c46ee386 2751 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2752 usb_sndbulkpipe(dev->udev, out_endpoint),
2753 NULL, 0, pn533_send_complete, dev);
c46ee386 2754
5d50b364
SO		 2755 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2756 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2757 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2758 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2759 INIT_WORK(&dev->poll_work, pn533_wq_poll);
17e9d9d4 2760 INIT_WORK(&dev->rf_work, pn533_wq_rf);
58637c9b 2761 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2762 if (dev->wq == NULL)
2763 goto error;
c46ee386 2764
6fbbdc16
SO		 2765 init_timer(&dev->listen_timer);
2766 dev->listen_timer.data = (unsigned long) dev;
2767 dev->listen_timer.function = pn533_listen_mode_timer;
2768
6ff73fd2
SO		 2769 skb_queue_head_init(&dev->resp_q);
2770
5d50b364
SO		 2771 INIT_LIST_HEAD(&dev->cmd_queue);
2772
c46ee386
AAJ		 2773 usb_set_intfdata(interface, dev);
2774
9e2d493e 2775 dev->ops = &pn533_std_frame_ops;
c46ee386 2776
58520373 2777 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
5c7b0531
SO		 2778 dev->device_type = id->driver_info;
2779 switch (dev->device_type) {
2780 case PN533_DEVICE_STD:
2781 protocols = PN533_ALL_PROTOCOLS;
2782 break;
2783
2784 case PN533_DEVICE_PASORI:
2785 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2786 break;
2787
53cf4839
WR		 2788 case PN533_DEVICE_ACR122U:
2789 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2790 dev->ops = &pn533_acr122_frame_ops;
2791 dev->protocol_type = PN533_PROTO_REQ_RESP,
2792
2793 rc = pn533_acr122_poweron_rdr(dev);
2794 if (rc < 0) {
2795 nfc_dev_err(&dev->interface->dev,
2796 "Couldn't poweron the reader (error %d)",
2797 rc);
2798 goto destroy_wq;
2799 }
2800 break;
2801
5c7b0531
SO		 2802 default:
2803 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2804 dev->device_type);
2805 rc = -EINVAL;
2806 goto destroy_wq;
2807 }
c46ee386 2808
9e2d493e
WR		 2809 memset(&fw_ver, 0, sizeof(fw_ver));
2810 rc = pn533_get_firmware_version(dev, &fw_ver);
2811 if (rc < 0)
2812 goto destroy_wq;
2813
2814 nfc_dev_info(&dev->interface->dev,
86eca4e7
OG		 2815 "NXP PN5%02X firmware ver %d.%d now attached",
2816 fw_ver.ic, fw_ver.ver, fw_ver.rev);
9e2d493e
WR		 2817
2818
e8753043 2819 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
9e2d493e 2820 dev->ops->tx_header_len +
e8753043 2821 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2822 dev->ops->tx_tail_len);
4674d0fe
WY		 2823 if (!dev->nfc_dev) {
2824 rc = -ENOMEM;
4849f85e 2825 goto destroy_wq;
4674d0fe 2826 }
c46ee386
AAJ		 2827
2828 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2829 nfc_set_drvdata(dev->nfc_dev, dev);
2830
2831 rc = nfc_register_device(dev->nfc_dev);
2832 if (rc)
2833 goto free_nfc_dev;
2834
5c7b0531
SO		 2835 rc = pn533_setup(dev);
2836 if (rc)
34a85bfc 2837 goto unregister_nfc_dev;
34a85bfc 2838
c46ee386
AAJ		 2839 return 0;
2840
9f2f8ba1
SO		 2841unregister_nfc_dev:
2842 nfc_unregister_device(dev->nfc_dev);
2843
c46ee386
AAJ		 2844free_nfc_dev:
2845 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2846
4849f85e
SO		 2847destroy_wq:
2848 destroy_workqueue(dev->wq);
c46ee386 2849error:
c46ee386 2850 usb_free_urb(dev->in_urb);
c46ee386 2851 usb_free_urb(dev->out_urb);
7c5a54fb 2852 usb_put_dev(dev->udev);
c46ee386
AAJ		 2853 kfree(dev);
2854 return rc;
2855}
2856
2857static void pn533_disconnect(struct usb_interface *interface)
2858{
2859 struct pn533 *dev;
5d50b364 2860 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2861
2862 dev = usb_get_intfdata(interface);
2863 usb_set_intfdata(interface, NULL);
2864
2865 nfc_unregister_device(dev->nfc_dev);
2866 nfc_free_device(dev->nfc_dev);
2867
2868 usb_kill_urb(dev->in_urb);
2869 usb_kill_urb(dev->out_urb);
2870
4849f85e 2871 destroy_workqueue(dev->wq);
c46ee386 2872
6ff73fd2
SO		 2873 skb_queue_purge(&dev->resp_q);
2874
6fbbdc16
SO		 2875 del_timer(&dev->listen_timer);
2876
5d50b364
SO		 2877 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2878 list_del(&cmd->queue);
2879 kfree(cmd);
2880 }
2881
c46ee386 2882 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2883 usb_free_urb(dev->out_urb);
2884 kfree(dev);
2885
276556db 2886 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2887}
2888
2889static struct usb_driver pn533_driver = {
2890 .name = "pn533",
2891 .probe = pn533_probe,
2892 .disconnect = pn533_disconnect,
2893 .id_table = pn533_table,
2894};
2895
fe748483 2896module_usb_driver(pn533_driver);
c46ee386 2897
e70b96e9
WR		 2898MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2899MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2900MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2901MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2902MODULE_VERSION(VERSION);
2903MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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