projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFC: pn533: Add delay between each poll frame
[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
46f793b0
SO		 86/* Delay between each poll frame (ms) */
87#define PN533_POLL_INTERVAL 10
6fbbdc16 88
1575b9d8 89/* Standard pn533 frame definitions (standard and extended)*/
63123108 90#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
b1bb290a 91 + 2) /* data[0] TFI, data[1] CC */
63123108 92#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82dec34d 93
1575b9d8
OG		 94#define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
95 + 2) /* data[0] TFI, data[1] CC */
96
97#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
98#define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */
99
15461aeb
WR		 100/*
101 * Max extended frame payload len, excluding TFI and CC
102 * which are already in PN533_FRAME_HEADER_LEN.
103 */
63123108 104#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
15461aeb 105
63123108 106#define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
5b5a4437 107 Postamble (1) */
63123108
WR		 108#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
109#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
1575b9d8
OG		 110/* Half start code (3), LEN (4) should be 0xffff for extended frame */
111#define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
112 && (hdr)->datalen_checksum == 0xFF)
113#define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
c46ee386
AAJ		 114
115/* start of frame */
63123108 116#define PN533_STD_FRAME_SOF 0x00FF
c46ee386 117
63123108
WR		 118/* standard frame identifier: in/out/error */
119#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
120#define PN533_STD_FRAME_DIR_OUT 0xD4
121#define PN533_STD_FRAME_DIR_IN 0xD5
c46ee386 122
53cf4839
WR		 123/* ACS ACR122 pn533 frame definitions */
124#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
125 + 2)
126#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
127#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
128 + 2)
129#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
130#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
131
132/* CCID messages types */
133#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
134#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
135
136#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
137
c46ee386 138/* PN533 Commands */
1575b9d8 139#define PN533_FRAME_CMD(f) (f->data[1])
c46ee386
AAJ		 140
141#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
142#define PN533_CMD_RF_CONFIGURATION 0x32
143#define PN533_CMD_IN_DATA_EXCHANGE 0x40
5c7b0531 144#define PN533_CMD_IN_COMM_THRU 0x42
c46ee386
AAJ		 145#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
146#define PN533_CMD_IN_ATR 0x50
147#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 148#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 149
ad3823ce 150#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 151#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 152#define PN533_CMD_TG_SET_DATA 0x8e
aada17ac 153#define PN533_CMD_UNDEF 0xff
ad3823ce 154
c46ee386
AAJ		 155#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
156
157/* PN533 Return codes */
158#define PN533_CMD_RET_MASK 0x3F
159#define PN533_CMD_MI_MASK 0x40
160#define PN533_CMD_RET_SUCCESS 0x00
161
162struct pn533;
163
aada17ac
WR		 164typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
165 struct sk_buff *resp);
166
c46ee386
AAJ		 167/* structs for pn533 commands */
168
169/* PN533_CMD_GET_FIRMWARE_VERSION */
170struct pn533_fw_version {
171 u8 ic;
172 u8 ver;
173 u8 rev;
174 u8 support;
175};
176
177/* PN533_CMD_RF_CONFIGURATION */
60d9edd5
SO		 178#define PN533_CFGITEM_RF_FIELD 0x01
179#define PN533_CFGITEM_TIMING 0x02
c46ee386 180#define PN533_CFGITEM_MAX_RETRIES 0x05
60d9edd5
SO		 181#define PN533_CFGITEM_PASORI 0x82
182
3a8eab39
SO		 183#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
184#define PN533_CFGITEM_RF_FIELD_ON 0x1
185#define PN533_CFGITEM_RF_FIELD_OFF 0x0
c46ee386 186
34a85bfc
SO		 187#define PN533_CONFIG_TIMING_102 0xb
188#define PN533_CONFIG_TIMING_204 0xc
189#define PN533_CONFIG_TIMING_409 0xd
190#define PN533_CONFIG_TIMING_819 0xe
191
c46ee386
AAJ		 192#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
193#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
194
195struct pn533_config_max_retries {
196 u8 mx_rty_atr;
197 u8 mx_rty_psl;
198 u8 mx_rty_passive_act;
199} __packed;
200
34a85bfc
SO		 201struct pn533_config_timing {
202 u8 rfu;
203 u8 atr_res_timeout;
204 u8 dep_timeout;
205} __packed;
206
c46ee386
AAJ		 207/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
208
209/* felica commands opcode */
210#define PN533_FELICA_OPC_SENSF_REQ 0
211#define PN533_FELICA_OPC_SENSF_RES 1
212/* felica SENSF_REQ parameters */
213#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
214#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
215#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
216#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
217
218/* type B initiator_data values */
219#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
220#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
221#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
222
223union pn533_cmd_poll_initdata {
224 struct {
225 u8 afi;
226 u8 polling_method;
227 } __packed type_b;
228 struct {
229 u8 opcode;
230 __be16 sc;
231 u8 rc;
232 u8 tsn;
233 } __packed felica;
234};
235
236/* Poll modulations */
237enum {
238 PN533_POLL_MOD_106KBPS_A,
239 PN533_POLL_MOD_212KBPS_FELICA,
240 PN533_POLL_MOD_424KBPS_FELICA,
241 PN533_POLL_MOD_106KBPS_JEWEL,
242 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 243 PN533_LISTEN_MOD,
c46ee386
AAJ		 244
245 __PN533_POLL_MOD_AFTER_LAST,
246};
247#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
248
249struct pn533_poll_modulations {
250 struct {
251 u8 maxtg;
252 u8 brty;
253 union pn533_cmd_poll_initdata initiator_data;
254 } __packed data;
255 u8 len;
256};
257
ef3d56e1 258static const struct pn533_poll_modulations poll_mod[] = {
c46ee386
AAJ		 259 [PN533_POLL_MOD_106KBPS_A] = {
260 .data = {
261 .maxtg = 1,
262 .brty = 0,
263 },
264 .len = 2,
265 },
266 [PN533_POLL_MOD_212KBPS_FELICA] = {
267 .data = {
268 .maxtg = 1,
269 .brty = 1,
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_424KBPS_FELICA] = {
280 .data = {
281 .maxtg = 1,
282 .brty = 2,
283 .initiator_data.felica = {
284 .opcode = PN533_FELICA_OPC_SENSF_REQ,
285 .sc = PN533_FELICA_SENSF_SC_ALL,
a94e10f7 286 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
31c44464 287 .tsn = 0x03,
c46ee386
AAJ		 288 },
289 },
290 .len = 7,
291 },
292 [PN533_POLL_MOD_106KBPS_JEWEL] = {
293 .data = {
294 .maxtg = 1,
295 .brty = 4,
296 },
297 .len = 2,
298 },
299 [PN533_POLL_MOD_847KBPS_B] = {
300 .data = {
301 .maxtg = 1,
302 .brty = 8,
303 .initiator_data.type_b = {
304 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
305 .polling_method =
306 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
307 },
308 },
309 .len = 3,
310 },
6fbbdc16
SO		 311 [PN533_LISTEN_MOD] = {
312 .len = 0,
313 },
c46ee386
AAJ		 314};
315
316/* PN533_CMD_IN_ATR */
317
c46ee386
AAJ		 318struct pn533_cmd_activate_response {
319 u8 status;
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;
329
361f3cb7
SO		 330struct pn533_cmd_jump_dep_response {
331 u8 status;
332 u8 tg;
333 u8 nfcid3t[10];
334 u8 didt;
335 u8 bst;
336 u8 brt;
337 u8 to;
338 u8 ppt;
339 /* optional */
340 u8 gt[];
341} __packed;
c46ee386 342
ad3823ce
SO		 343
344/* PN533_TG_INIT_AS_TARGET */
345#define PN533_INIT_TARGET_PASSIVE 0x1
346#define PN533_INIT_TARGET_DEP 0x2
347
fc40a8c1
SO		 348#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
349#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
350#define PN533_INIT_TARGET_RESP_DEP 0x4
351
58520373
WR		 352enum pn533_protocol_type {
353 PN533_PROTO_REQ_ACK_RESP = 0,
354 PN533_PROTO_REQ_RESP
355};
356
c46ee386
AAJ		 357struct pn533 {
358 struct usb_device *udev;
359 struct usb_interface *interface;
360 struct nfc_dev *nfc_dev;
d5590bba 361 u32 device_type;
58520373 362 enum pn533_protocol_type protocol_type;
c46ee386
AAJ		 363
364 struct urb *out_urb;
c46ee386 365 struct urb *in_urb;
c46ee386 366
6ff73fd2 367 struct sk_buff_head resp_q;
963a82e0 368 struct sk_buff_head fragment_skb;
6ff73fd2 369
4849f85e
SO		 370 struct workqueue_struct *wq;
371 struct work_struct cmd_work;
5d50b364 372 struct work_struct cmd_complete_work;
46f793b0 373 struct delayed_work poll_work;
963a82e0
OG		 374 struct work_struct mi_rx_work;
375 struct work_struct mi_tx_work;
103b34cf 376 struct work_struct tg_work;
17e9d9d4 377 struct work_struct rf_work;
d5590bba
WR		 378
379 struct list_head cmd_queue;
380 struct pn533_cmd *cmd;
381 u8 cmd_pending;
d5590bba 382 struct mutex cmd_lock; /* protects cmd queue */
c46ee386 383
b1e666f5 384 void *cmd_complete_mi_arg;
963a82e0 385 void *cmd_complete_dep_arg;
c46ee386
AAJ		 386
387 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
388 u8 poll_mod_count;
389 u8 poll_mod_curr;
390 u32 poll_protocols;
6fbbdc16 391 u32 listen_protocols;
d5590bba
WR		 392 struct timer_list listen_timer;
393 int cancel_listen;
6fbbdc16
SO		 394
395 u8 *gb;
396 size_t gb_len;
c46ee386
AAJ		 397
398 u8 tgt_available_prots;
399 u8 tgt_active_prot;
51ad304c 400 u8 tgt_mode;
5c7b0531 401
9e2d493e 402 struct pn533_frame_ops *ops;
5d50b364
SO		 403};
404
405struct pn533_cmd {
406 struct list_head queue;
4b2a9532 407 u8 code;
f87bc9fb 408 int status;
aada17ac
WR		 409 struct sk_buff *req;
410 struct sk_buff *resp;
9e2d493e 411 int resp_len;
4231604b
WR		 412 pn533_send_async_complete_t complete_cb;
413 void *complete_cb_context;
c46ee386
AAJ		 414};
415
63123108 416struct pn533_std_frame {
c46ee386
AAJ		 417 u8 preamble;
418 __be16 start_frame;
419 u8 datalen;
420 u8 datalen_checksum;
421 u8 data[];
422} __packed;
423
1575b9d8
OG		 424struct pn533_ext_frame { /* Extended Information frame */
425 u8 preamble;
426 __be16 start_frame;
427 __be16 eif_flag; /* fixed to 0xFFFF */
428 __be16 datalen;
429 u8 datalen_checksum;
430 u8 data[];
431} __packed;
432
9e2d493e
WR		 433struct pn533_frame_ops {
434 void (*tx_frame_init)(void *frame, u8 cmd_code);
435 void (*tx_frame_finish)(void *frame);
436 void (*tx_update_payload_len)(void *frame, int len);
437 int tx_header_len;
438 int tx_tail_len;
439
56a63c82 440 bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
9e2d493e
WR		 441 int (*rx_frame_size)(void *frame);
442 int rx_header_len;
443 int rx_tail_len;
444
445 int max_payload_len;
446 u8 (*get_cmd_code)(void *frame);
447};
448
53cf4839
WR		 449struct pn533_acr122_ccid_hdr {
450 u8 type;
451 u32 datalen;
452 u8 slot;
453 u8 seq;
454 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
455 byte for reposnse msg */
456 u8 data[]; /* payload */
457} __packed;
458
459struct pn533_acr122_apdu_hdr {
460 u8 class;
461 u8 ins;
462 u8 p1;
463 u8 p2;
464} __packed;
465
466struct pn533_acr122_tx_frame {
467 struct pn533_acr122_ccid_hdr ccid;
468 struct pn533_acr122_apdu_hdr apdu;
469 u8 datalen;
470 u8 data[]; /* pn533 frame: TFI ... */
471} __packed;
472
473struct pn533_acr122_rx_frame {
474 struct pn533_acr122_ccid_hdr ccid;
475 u8 data[]; /* pn533 frame : TFI ... */
476} __packed;
477
478static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
479{
480 struct pn533_acr122_tx_frame *frame = _frame;
481
482 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
483 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
484 sizeof(datalen) */
485 frame->ccid.slot = 0;
486 frame->ccid.seq = 0;
487 frame->ccid.params[0] = 0;
488 frame->ccid.params[1] = 0;
489 frame->ccid.params[2] = 0;
490
491 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
492 frame->data[1] = cmd_code;
493 frame->datalen = 2; /* data[0] + data[1] */
494
495 frame->apdu.class = 0xFF;
496 frame->apdu.ins = 0;
497 frame->apdu.p1 = 0;
498 frame->apdu.p2 = 0;
499}
500
501static void pn533_acr122_tx_frame_finish(void *_frame)
502{
503 struct pn533_acr122_tx_frame *frame = _frame;
504
505 frame->ccid.datalen += frame->datalen;
506}
507
508static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
509{
510 struct pn533_acr122_tx_frame *frame = _frame;
511
512 frame->datalen += len;
513}
514
56a63c82 515static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
53cf4839
WR		 516{
517 struct pn533_acr122_rx_frame *frame = _frame;
518
519 if (frame->ccid.type != 0x83)
520 return false;
521
522 if (frame->data[frame->ccid.datalen - 2] == 0x63)
523 return false;
524
525 return true;
526}
527
528static int pn533_acr122_rx_frame_size(void *frame)
529{
530 struct pn533_acr122_rx_frame *f = frame;
531
532 /* f->ccid.datalen already includes tail length */
533 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
534}
535
536static u8 pn533_acr122_get_cmd_code(void *frame)
537{
538 struct pn533_acr122_rx_frame *f = frame;
539
1575b9d8 540 return PN533_FRAME_CMD(f);
53cf4839
WR		 541}
542
543static struct pn533_frame_ops pn533_acr122_frame_ops = {
544 .tx_frame_init = pn533_acr122_tx_frame_init,
545 .tx_frame_finish = pn533_acr122_tx_frame_finish,
546 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
547 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
548 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
549
550 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
551 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
552 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
553 .rx_frame_size = pn533_acr122_rx_frame_size,
554
555 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
556 .get_cmd_code = pn533_acr122_get_cmd_code,
557};
558
1575b9d8
OG		 559/* The rule: value(high byte) + value(low byte) + checksum = 0 */
560static inline u8 pn533_ext_checksum(u16 value)
561{
562 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
563}
564
c46ee386 565/* The rule: value + checksum = 0 */
63123108 566static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 567{
568 return ~value + 1;
569}
570
571/* The rule: sum(data elements) + checksum = 0 */
63123108 572static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 573{
574 u8 sum = 0;
575 int i;
576
577 for (i = 0; i < datalen; i++)
578 sum += data[i];
579
63123108 580 return pn533_std_checksum(sum);
c46ee386
AAJ		 581}
582
63123108 583static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 584{
63123108 585 struct pn533_std_frame *frame = _frame;
9e2d493e 586
c46ee386 587 frame->preamble = 0;
63123108
WR		 588 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
589 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
1575b9d8 590 PN533_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 591 frame->datalen = 2;
592}
593
63123108 594static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 595{
63123108 596 struct pn533_std_frame *frame = _frame;
9e2d493e 597
63123108 598 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 599
63123108
WR		 600 PN533_STD_FRAME_CHECKSUM(frame) =
601 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 602
63123108 603 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 604}
605
63123108 606static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 607{
63123108 608 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 609
610 frame->datalen += len;
611}
612
56a63c82 613static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
c46ee386
AAJ		 614{
615 u8 checksum;
1575b9d8 616 struct pn533_std_frame *stdf = _frame;
c46ee386 617
1575b9d8 618 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 619 return false;
620
1575b9d8
OG		 621 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
622 /* Standard frame code */
56a63c82 623 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
1575b9d8
OG		 624
625 checksum = pn533_std_checksum(stdf->datalen);
626 if (checksum != stdf->datalen_checksum)
627 return false;
628
629 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
630 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
631 return false;
632 } else {
633 /* Extended */
634 struct pn533_ext_frame *eif = _frame;
635
56a63c82
OG		 636 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
637
1575b9d8
OG		 638 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
639 if (checksum != eif->datalen_checksum)
640 return false;
641
642 /* check data checksum */
643 checksum = pn533_std_data_checksum(eif->data,
644 be16_to_cpu(eif->datalen));
645 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
646 return false;
647 }
c46ee386
AAJ		 648
649 return true;
650}
651
63123108 652static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 653{
63123108 654 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 655 return false;
656
657 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
658 return false;
659
660 return true;
661}
662
63123108 663static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 664{
63123108 665 struct pn533_std_frame *f = frame;
9e2d493e 666
1575b9d8
OG		 667 /* check for Extended Information frame */
668 if (PN533_STD_IS_EXTENDED(f)) {
669 struct pn533_ext_frame *eif = frame;
670
671 return sizeof(struct pn533_ext_frame)
672 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
673 }
674
63123108
WR		 675 return sizeof(struct pn533_std_frame) + f->datalen +
676 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 677}
678
63123108 679static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 680{
63123108 681 struct pn533_std_frame *f = frame;
1575b9d8 682 struct pn533_ext_frame *eif = frame;
9e2d493e 683
1575b9d8
OG		 684 if (PN533_STD_IS_EXTENDED(f))
685 return PN533_FRAME_CMD(eif);
686 else
687 return PN533_FRAME_CMD(f);
9e2d493e
WR		 688}
689
ef3d56e1 690static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 691 .tx_frame_init = pn533_std_tx_frame_init,
692 .tx_frame_finish = pn533_std_tx_frame_finish,
693 .tx_update_payload_len = pn533_std_tx_update_payload_len,
694 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
695 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
696
697 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
698 .rx_frame_size = pn533_std_rx_frame_size,
699 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
700 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
701
702 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
703 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 704};
705
706static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 707{
2c206fb7 708 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 709 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 710}
711
c46ee386
AAJ		 712static void pn533_recv_response(struct urb *urb)
713{
714 struct pn533 *dev = urb->context;
f87bc9fb 715 struct pn533_cmd *cmd = dev->cmd;
9e2d493e 716 u8 *in_frame;
c46ee386 717
f87bc9fb
WR		 718 cmd->status = urb->status;
719
c46ee386
AAJ		 720 switch (urb->status) {
721 case 0:
f8f99171 722 break; /* success */
c46ee386
AAJ		 723 case -ECONNRESET:
724 case -ENOENT:
6ca55372 725 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 726 "The urb has been canceled (status %d)",
727 urb->status);
4849f85e 728 goto sched_wq;
f8f99171 729 case -ESHUTDOWN:
c46ee386 730 default:
6ca55372 731 nfc_dev_err(&dev->interface->dev,
f8f99171 732 "Urb failure (status %d)", urb->status);
4849f85e 733 goto sched_wq;
c46ee386
AAJ		 734 }
735
736 in_frame = dev->in_urb->transfer_buffer;
737
fcfafc76 738 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
e279f84f
SO		 739 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
740 dev->ops->rx_frame_size(in_frame), false);
99e591be 741
56a63c82 742 if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
c46ee386 743 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
f87bc9fb 744 cmd->status = -EIO;
4849f85e 745 goto sched_wq;
c46ee386
AAJ		 746 }
747
9e2d493e 748 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 749 nfc_dev_err(&dev->interface->dev,
750 "It it not the response to the last command");
f87bc9fb 751 cmd->status = -EIO;
4849f85e 752 goto sched_wq;
c46ee386
AAJ		 753 }
754
4849f85e 755sched_wq:
5d50b364 756 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 757}
758
759static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
760{
761 dev->in_urb->complete = pn533_recv_response;
762
763 return usb_submit_urb(dev->in_urb, flags);
764}
765
766static void pn533_recv_ack(struct urb *urb)
767{
768 struct pn533 *dev = urb->context;
f87bc9fb 769 struct pn533_cmd *cmd = dev->cmd;
63123108 770 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 771 int rc;
772
f87bc9fb
WR		 773 cmd->status = urb->status;
774
c46ee386
AAJ		 775 switch (urb->status) {
776 case 0:
f8f99171 777 break; /* success */
c46ee386
AAJ		 778 case -ECONNRESET:
779 case -ENOENT:
6ca55372 780 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 781 "The urb has been stopped (status %d)",
782 urb->status);
4849f85e 783 goto sched_wq;
f8f99171 784 case -ESHUTDOWN:
c46ee386 785 default:
6ca55372 786 nfc_dev_err(&dev->interface->dev,
f8f99171 787 "Urb failure (status %d)", urb->status);
4849f85e 788 goto sched_wq;
c46ee386
AAJ		 789 }
790
791 in_frame = dev->in_urb->transfer_buffer;
792
63123108 793 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 794 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
f87bc9fb 795 cmd->status = -EIO;
4849f85e 796 goto sched_wq;
c46ee386
AAJ		 797 }
798
c46ee386
AAJ		 799 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
800 if (rc) {
6ca55372
WR		 801 nfc_dev_err(&dev->interface->dev,
802 "usb_submit_urb failed with result %d", rc);
f87bc9fb 803 cmd->status = rc;
4849f85e 804 goto sched_wq;
c46ee386
AAJ		 805 }
806
807 return;
808
4849f85e 809sched_wq:
5d50b364 810 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 811}
812
813static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
814{
815 dev->in_urb->complete = pn533_recv_ack;
816
817 return usb_submit_urb(dev->in_urb, flags);
818}
819
820static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
821{
63123108 822 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 823 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 824 int rc;
825
826 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
827
5b5a4437
WR		 828 dev->out_urb->transfer_buffer = ack;
829 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 830 rc = usb_submit_urb(dev->out_urb, flags);
831
832 return rc;
833}
834
e8f40531
WR		 835static int __pn533_send_frame_async(struct pn533 *dev,
836 struct sk_buff *out,
837 struct sk_buff *in,
ddf19d20 838 int in_len)
c46ee386
AAJ		 839{
840 int rc;
841
e8f40531
WR		 842 dev->out_urb->transfer_buffer = out->data;
843 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 844
e8f40531
WR		 845 dev->in_urb->transfer_buffer = in->data;
846 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 847
e279f84f
SO		 848 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
849 out->data, out->len, false);
99e591be 850
d94ea4f5 851 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 852 if (rc)
853 return rc;
854
58520373
WR		 855 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
856 /* request for response for sent packet directly */
857 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
858 if (rc)
859 goto error;
860 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
861 /* request for ACK if that's the case */
862 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
863 if (rc)
864 goto error;
865 }
c46ee386
AAJ		 866
867 return 0;
868
869error:
870 usb_unlink_urb(dev->out_urb);
871 return rc;
872}
873
9e2d493e
WR		 874static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
875 struct sk_buff *skb)
aada17ac 876{
aada17ac
WR		 877 /* payload is already there, just update datalen */
878 int payload_len = skb->len;
9e2d493e 879 struct pn533_frame_ops *ops = dev->ops;
aada17ac 880
aada17ac 881
9e2d493e
WR		 882 skb_push(skb, ops->tx_header_len);
883 skb_put(skb, ops->tx_tail_len);
aada17ac 884
9e2d493e
WR		 885 ops->tx_frame_init(skb->data, cmd_code);
886 ops->tx_update_payload_len(skb->data, payload_len);
887 ops->tx_frame_finish(skb->data);
aada17ac
WR		 888}
889
ddf19d20 890static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 891{
ddf19d20 892 struct pn533_cmd *cmd = dev->cmd;
f87bc9fb 893 int status = cmd->status;
aada17ac 894
4231604b
WR		 895 struct sk_buff *req = cmd->req;
896 struct sk_buff *resp = cmd->resp;
aada17ac 897
aada17ac
WR		 898 int rc;
899
900 dev_kfree_skb(req);
901
0c33d262 902 if (status < 0) {
4231604b
WR		 903 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
904 ERR_PTR(status));
aada17ac 905 dev_kfree_skb(resp);
2c206fb7 906 goto done;
aada17ac
WR		 907 }
908
9e2d493e
WR		 909 skb_put(resp, dev->ops->rx_frame_size(resp->data));
910 skb_pull(resp, dev->ops->rx_header_len);
911 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 912
4231604b 913 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 914
2c206fb7 915done:
4231604b 916 kfree(cmd);
2c206fb7 917 dev->cmd = NULL;
aada17ac
WR		 918 return rc;
919}
920
921static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
922 struct sk_buff *req, struct sk_buff *resp,
923 int resp_len,
924 pn533_send_async_complete_t complete_cb,
925 void *complete_cb_context)
926{
927 struct pn533_cmd *cmd;
aada17ac
WR		 928 int rc = 0;
929
fcfafc76 930 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 931
4231604b
WR		 932 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
933 if (!cmd)
aada17ac
WR		 934 return -ENOMEM;
935
4b2a9532 936 cmd->code = cmd_code;
4231604b
WR		 937 cmd->req = req;
938 cmd->resp = resp;
939 cmd->resp_len = resp_len;
940 cmd->complete_cb = complete_cb;
941 cmd->complete_cb_context = complete_cb_context;
aada17ac 942
9e2d493e 943 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 944
945 mutex_lock(&dev->cmd_lock);
946
947 if (!dev->cmd_pending) {
ddf19d20 948 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 949 if (rc)
950 goto error;
951
952 dev->cmd_pending = 1;
2c206fb7 953 dev->cmd = cmd;
aada17ac
WR		 954 goto unlock;
955 }
956
fcfafc76
WR		 957 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
958 cmd_code);
aada17ac 959
aada17ac 960 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 961 list_add_tail(&cmd->queue, &dev->cmd_queue);
962
963 goto unlock;
964
965error:
4231604b 966 kfree(cmd);
aada17ac
WR		 967unlock:
968 mutex_unlock(&dev->cmd_lock);
969 return rc;
15461aeb
WR		 970}
971
972static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
973 struct sk_buff *req,
974 pn533_send_async_complete_t complete_cb,
975 void *complete_cb_context)
976{
977 struct sk_buff *resp;
978 int rc;
9e2d493e
WR		 979 int resp_len = dev->ops->rx_header_len +
980 dev->ops->max_payload_len +
981 dev->ops->rx_tail_len;
15461aeb 982
15461aeb
WR		 983 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
984 if (!resp)
985 return -ENOMEM;
986
987 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
988 complete_cb_context);
989 if (rc)
990 dev_kfree_skb(resp);
991
992 return rc;
aada17ac
WR		 993}
994
995static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
996 struct sk_buff *req,
997 pn533_send_async_complete_t complete_cb,
998 void *complete_cb_context)
999{
1000 struct sk_buff *resp;
1001 int rc;
9e2d493e
WR		 1002 int resp_len = dev->ops->rx_header_len +
1003 dev->ops->max_payload_len +
1004 dev->ops->rx_tail_len;
aada17ac 1005
9e2d493e 1006 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 1007 if (!resp)
1008 return -ENOMEM;
1009
9e2d493e
WR		 1010 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
1011 complete_cb_context);
aada17ac
WR		 1012 if (rc)
1013 dev_kfree_skb(resp);
1014
1015 return rc;
1016}
1017
b1e666f5
WR		 1018/*
1019 * pn533_send_cmd_direct_async
1020 *
1021 * The function sends a piority cmd directly to the chip omiting the cmd
1022 * queue. It's intended to be used by chaining mechanism of received responses
1023 * where the host has to request every single chunk of data before scheduling
1024 * next cmd from the queue.
1025 */
1026static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
1027 struct sk_buff *req,
1028 pn533_send_async_complete_t complete_cb,
1029 void *complete_cb_context)
1030{
b1e666f5 1031 struct sk_buff *resp;
4231604b 1032 struct pn533_cmd *cmd;
b1e666f5 1033 int rc;
9e2d493e
WR		 1034 int resp_len = dev->ops->rx_header_len +
1035 dev->ops->max_payload_len +
1036 dev->ops->rx_tail_len;
b1e666f5 1037
b1e666f5
WR		 1038 resp = alloc_skb(resp_len, GFP_KERNEL);
1039 if (!resp)
1040 return -ENOMEM;
1041
4231604b
WR		 1042 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1043 if (!cmd) {
b1e666f5
WR		 1044 dev_kfree_skb(resp);
1045 return -ENOMEM;
1046 }
1047
4b2a9532 1048 cmd->code = cmd_code;
4231604b
WR		 1049 cmd->req = req;
1050 cmd->resp = resp;
1051 cmd->resp_len = resp_len;
1052 cmd->complete_cb = complete_cb;
1053 cmd->complete_cb_context = complete_cb_context;
b1e666f5 1054
9e2d493e 1055 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 1056
ddf19d20 1057 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 1058 if (rc < 0) {
1059 dev_kfree_skb(resp);
4231604b 1060 kfree(cmd);
2c206fb7
WR		 1061 } else {
1062 dev->cmd = cmd;
b1e666f5
WR		 1063 }
1064
1065 return rc;
1066}
1067
c79490e1
WR		 1068static void pn533_wq_cmd_complete(struct work_struct *work)
1069{
1070 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1071 int rc;
1072
1073 rc = pn533_send_async_complete(dev);
1074 if (rc != -EINPROGRESS)
1075 queue_work(dev->wq, &dev->cmd_work);
1076}
1077
5d50b364
SO		 1078static void pn533_wq_cmd(struct work_struct *work)
1079{
1080 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1081 struct pn533_cmd *cmd;
0ce1fbdd 1082 int rc;
5d50b364
SO		 1083
1084 mutex_lock(&dev->cmd_lock);
1085
1086 if (list_empty(&dev->cmd_queue)) {
1087 dev->cmd_pending = 0;
1088 mutex_unlock(&dev->cmd_lock);
1089 return;
1090 }
1091
1092 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1093
60ad07ab
SJ		 1094 list_del(&cmd->queue);
1095
5d50b364
SO		 1096 mutex_unlock(&dev->cmd_lock);
1097
ddf19d20 1098 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 1099 if (rc < 0) {
1100 dev_kfree_skb(cmd->req);
1101 dev_kfree_skb(cmd->resp);
4231604b 1102 kfree(cmd);
2c206fb7 1103 return;
0ce1fbdd 1104 }
2c206fb7
WR		 1105
1106 dev->cmd = cmd;
5d50b364
SO		 1107}
1108
c46ee386 1109struct pn533_sync_cmd_response {
94c5c156 1110 struct sk_buff *resp;
c46ee386
AAJ		 1111 struct completion done;
1112};
1113
94c5c156
WR		 1114static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1115 struct sk_buff *resp)
1116{
1117 struct pn533_sync_cmd_response *arg = _arg;
1118
94c5c156
WR		 1119 arg->resp = resp;
1120 complete(&arg->done);
1121
1122 return 0;
1123}
1124
1125/* pn533_send_cmd_sync
1126 *
1127 * Please note the req parameter is freed inside the function to
1128 * limit a number of return value interpretations by the caller.
1129 *
1130 * 1. negative in case of error during TX path -> req should be freed
1131 *
1132 * 2. negative in case of error during RX path -> req should not be freed
1133 * as it's been already freed at the begining of RX path by
1134 * async_complete_cb.
1135 *
1136 * 3. valid pointer in case of succesfult RX path
1137 *
1138 * A caller has to check a return value with IS_ERR macro. If the test pass,
1139 * the returned pointer is valid.
1140 *
1141 * */
1142static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1143 struct sk_buff *req)
1144{
1145 int rc;
1146 struct pn533_sync_cmd_response arg;
1147
94c5c156
WR		 1148 init_completion(&arg.done);
1149
1150 rc = pn533_send_cmd_async(dev, cmd_code, req,
1151 pn533_send_sync_complete, &arg);
1152 if (rc) {
1153 dev_kfree_skb(req);
1154 return ERR_PTR(rc);
1155 }
1156
1157 wait_for_completion(&arg.done);
1158
1159 return arg.resp;
1160}
1161
c46ee386
AAJ		 1162static void pn533_send_complete(struct urb *urb)
1163{
1164 struct pn533 *dev = urb->context;
1165
c46ee386
AAJ		 1166 switch (urb->status) {
1167 case 0:
f8f99171 1168 break; /* success */
c46ee386
AAJ		 1169 case -ECONNRESET:
1170 case -ENOENT:
6ca55372 1171 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 1172 "The urb has been stopped (status %d)",
1173 urb->status);
c46ee386 1174 break;
f8f99171 1175 case -ESHUTDOWN:
c46ee386 1176 default:
f8f99171
WR		 1177 nfc_dev_err(&dev->interface->dev,
1178 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 1179 }
1180}
1181
10cff29a
WR		 1182static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1183{
1184 /* ACR122U does not support any command which aborts last
1185 * issued command i.e. as ACK for standard PN533. Additionally,
1186 * it behaves stange, sending broken or incorrect responses,
1187 * when we cancel urb before the chip will send response.
1188 */
1189 if (dev->device_type == PN533_DEVICE_ACR122U)
1190 return;
1191
1192 /* An ack will cancel the last issued command */
1193 pn533_send_ack(dev, flags);
1194
1195 /* cancel the urb request */
1196 usb_kill_urb(dev->in_urb);
1197}
1198
9e2d493e 1199static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 1200{
1201 struct sk_buff *skb;
1202
9e2d493e 1203 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 1204 size +
9e2d493e 1205 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 1206
1207 if (skb)
9e2d493e 1208 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 1209
1210 return skb;
1211}
1212
c46ee386
AAJ		 1213struct pn533_target_type_a {
1214 __be16 sens_res;
1215 u8 sel_res;
1216 u8 nfcid_len;
1217 u8 nfcid_data[];
1218} __packed;
1219
1220
1221#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1222#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1223#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1224
1225#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1226#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1227
1228#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1229#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1230
1231#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1232#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1233#define PN533_TYPE_A_SEL_PROT_DEP 2
1234#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1235
1236static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1237 int target_data_len)
1238{
1239 u8 ssd;
1240 u8 platconf;
1241
1242 if (target_data_len < sizeof(struct pn533_target_type_a))
1243 return false;
1244
1245 /* The lenght check of nfcid[] and ats[] are not being performed because
1246 the values are not being used */
1247
1248 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1249 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1250 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1251
1252 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1253 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1254 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1255 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1256 return false;
1257
1258 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1259 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1260 return false;
1261
1262 return true;
1263}
1264
1265static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1266 int tgt_data_len)
1267{
1268 struct pn533_target_type_a *tgt_type_a;
1269
37cf4fc6 1270 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1271
1272 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1273 return -EPROTO;
1274
1275 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1276 case PN533_TYPE_A_SEL_PROT_MIFARE:
1277 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1278 break;
1279 case PN533_TYPE_A_SEL_PROT_ISO14443:
1280 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1281 break;
1282 case PN533_TYPE_A_SEL_PROT_DEP:
1283 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1284 break;
1285 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1286 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1287 NFC_PROTO_NFC_DEP_MASK;
1288 break;
1289 }
1290
1291 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1292 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1293 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1294 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1295
1296 return 0;
1297}
1298
1299struct pn533_target_felica {
1300 u8 pol_res;
1301 u8 opcode;
322bce95 1302 u8 nfcid2[NFC_NFCID2_MAXSIZE];
c46ee386
AAJ		 1303 u8 pad[8];
1304 /* optional */
1305 u8 syst_code[];
1306} __packed;
1307
1308#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1309#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1310
1311static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1312 int target_data_len)
1313{
1314 if (target_data_len < sizeof(struct pn533_target_felica))
1315 return false;
1316
1317 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1318 return false;
1319
1320 return true;
1321}
1322
1323static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1324 int tgt_data_len)
1325{
1326 struct pn533_target_felica *tgt_felica;
1327
37cf4fc6 1328 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1329
1330 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1331 return -EPROTO;
1332
5d467742
WR		 1333 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1334 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1335 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1336 else
1337 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1338
7975754f
SO		 1339 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1340 nfc_tgt->sensf_res_len = 9;
1341
322bce95
SO		 1342 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1343 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1344
c46ee386
AAJ		 1345 return 0;
1346}
1347
1348struct pn533_target_jewel {
1349 __be16 sens_res;
1350 u8 jewelid[4];
1351} __packed;
1352
1353static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1354 int target_data_len)
1355{
1356 u8 ssd;
1357 u8 platconf;
1358
1359 if (target_data_len < sizeof(struct pn533_target_jewel))
1360 return false;
1361
1362 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1363 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1364 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1365
1366 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1367 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1368 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1369 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1370 return false;
1371
1372 return true;
1373}
1374
1375static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1376 int tgt_data_len)
1377{
1378 struct pn533_target_jewel *tgt_jewel;
1379
37cf4fc6 1380 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1381
1382 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1383 return -EPROTO;
1384
1385 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1386 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1387 nfc_tgt->nfcid1_len = 4;
1388 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1389
1390 return 0;
1391}
1392
1393struct pn533_type_b_prot_info {
1394 u8 bitrate;
1395 u8 fsci_type;
1396 u8 fwi_adc_fo;
1397} __packed;
1398
1399#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1400#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1401#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1402
1403struct pn533_type_b_sens_res {
1404 u8 opcode;
1405 u8 nfcid[4];
1406 u8 appdata[4];
1407 struct pn533_type_b_prot_info prot_info;
1408} __packed;
1409
1410#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1411
1412struct pn533_target_type_b {
1413 struct pn533_type_b_sens_res sensb_res;
1414 u8 attrib_res_len;
1415 u8 attrib_res[];
1416} __packed;
1417
1418static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1419 int target_data_len)
1420{
1421 if (target_data_len < sizeof(struct pn533_target_type_b))
1422 return false;
1423
1424 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1425 return false;
1426
1427 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1428 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1429 return false;
1430
1431 return true;
1432}
1433
1434static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1435 int tgt_data_len)
1436{
1437 struct pn533_target_type_b *tgt_type_b;
1438
37cf4fc6 1439 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1440
1441 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1442 return -EPROTO;
1443
01d719a2 1444 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1445
1446 return 0;
1447}
1448
b5193e5d
WR		 1449static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1450 int tgdata_len)
c46ee386 1451{
c46ee386
AAJ		 1452 struct nfc_target nfc_tgt;
1453 int rc;
1454
1455 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1456 dev->poll_mod_curr);
c46ee386 1457
b5193e5d 1458 if (tg != 1)
c46ee386
AAJ		 1459 return -EPROTO;
1460
98b3ac1b
SO		 1461 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1462
c46ee386
AAJ		 1463 switch (dev->poll_mod_curr) {
1464 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1465 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1466 break;
1467 case PN533_POLL_MOD_212KBPS_FELICA:
1468 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1469 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1470 break;
1471 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1472 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1473 break;
1474 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1475 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1476 break;
1477 default:
b5193e5d
WR		 1478 nfc_dev_err(&dev->interface->dev,
1479 "Unknown current poll modulation");
c46ee386
AAJ		 1480 return -EPROTO;
1481 }
1482
1483 if (rc)
1484 return rc;
1485
1486 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1487 nfc_dev_dbg(&dev->interface->dev,
1488 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1489 return -EAGAIN;
1490 }
1491
b5193e5d
WR		 1492 nfc_dev_dbg(&dev->interface->dev,
1493 "Target found - supported protocols: 0x%x",
1494 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1495
1496 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1497
1498 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1499
1500 return 0;
1501}
1502
6fbbdc16
SO		 1503static inline void pn533_poll_next_mod(struct pn533 *dev)
1504{
1505 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1506}
1507
c46ee386
AAJ		 1508static void pn533_poll_reset_mod_list(struct pn533 *dev)
1509{
1510 dev->poll_mod_count = 0;
1511}
1512
1513static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1514{
1515 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1516 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1517 dev->poll_mod_count++;
1518}
1519
6fbbdc16
SO		 1520static void pn533_poll_create_mod_list(struct pn533 *dev,
1521 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1522{
1523 pn533_poll_reset_mod_list(dev);
1524
b08e8603
WR		 1525 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1526 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1527 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1528 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1529
b08e8603
WR		 1530 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1531 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1532 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1533 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1534 }
1535
6fbbdc16 1536 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1537 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1538
01d719a2 1539 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1540 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1541
6fbbdc16
SO		 1542 if (tm_protocols)
1543 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1544}
1545
b5193e5d 1546static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1547{
b5193e5d
WR		 1548 u8 nbtg, tg, *tgdata;
1549 int rc, tgdata_len;
c46ee386
AAJ		 1550
1551 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1552
b5193e5d
WR		 1553 nbtg = resp->data[0];
1554 tg = resp->data[1];
1555 tgdata = &resp->data[2];
1556 tgdata_len = resp->len - 2; /* nbtg + tg */
1557
1558 if (nbtg) {
1559 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1560
1561 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1562 if (rc == 0) {
1563 pn533_poll_reset_mod_list(dev);
1564 return 0;
1565 }
c46ee386
AAJ		 1566 }
1567
6fbbdc16 1568 return -EAGAIN;
c46ee386
AAJ		 1569}
1570
9e2d493e 1571static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1572{
b5193e5d
WR		 1573 struct sk_buff *skb;
1574 u8 *felica, *nfcid3, *gb;
1575
9e2d493e
WR		 1576 u8 *gbytes = dev->gb;
1577 size_t gbytes_len = dev->gb_len;
1578
51d9e803
SO		 1579 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1580 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1581 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1582 0xff, 0xff}; /* System code */
b5193e5d 1583
51d9e803
SO		 1584 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1585 0x0, 0x0, 0x0,
1586 0x40}; /* SEL_RES for DEP */
ad3823ce 1587
b5193e5d
WR		 1588 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1589 felica (18), nfcid3 (10), gb_len (1) */
1590 gbytes_len +
1591 1; /* len Tk*/
ad3823ce 1592
9e2d493e 1593 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1594 if (!skb)
1595 return NULL;
ad3823ce
SO		 1596
1597 /* DEP support only */
52f2eaee 1598 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1599
1600 /* MIFARE params */
1601 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1602
1603 /* Felica params */
b5193e5d
WR		 1604 felica = skb_put(skb, 18);
1605 memcpy(felica, felica_params, 18);
1606 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1607
1608 /* NFCID3 */
b5193e5d
WR		 1609 nfcid3 = skb_put(skb, 10);
1610 memset(nfcid3, 0, 10);
1611 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1612
1613 /* General bytes */
b5193e5d 1614 *skb_put(skb, 1) = gbytes_len;
51d9e803 1615
b5193e5d
WR		 1616 gb = skb_put(skb, gbytes_len);
1617 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1618
b5193e5d
WR		 1619 /* Len Tk */
1620 *skb_put(skb, 1) = 0;
51d9e803 1621
b5193e5d 1622 return skb;
ad3823ce
SO		 1623}
1624
b1bb290a 1625#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1626#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1627static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1628 struct sk_buff *resp)
103b34cf 1629{
e4878823 1630 u8 status;
103b34cf
SO		 1631
1632 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1633
e4878823
WR		 1634 if (IS_ERR(resp))
1635 return PTR_ERR(resp);
103b34cf 1636
e4878823
WR		 1637 status = resp->data[0];
1638 skb_pull(resp, sizeof(status));
103b34cf 1639
e4878823 1640 if (status != 0) {
103b34cf 1641 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1642 dev->tgt_mode = 0;
e4878823 1643 dev_kfree_skb(resp);
103b34cf
SO		 1644 return 0;
1645 }
1646
e4878823 1647 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1648}
1649
1650static void pn533_wq_tg_get_data(struct work_struct *work)
1651{
1652 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1653
e4878823
WR		 1654 struct sk_buff *skb;
1655 int rc;
103b34cf 1656
e4878823 1657 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1658
9e2d493e 1659 skb = pn533_alloc_skb(dev, 0);
e4878823 1660 if (!skb)
103b34cf
SO		 1661 return;
1662
e4878823
WR		 1663 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1664 pn533_tm_get_data_complete, NULL);
103b34cf 1665
e4878823
WR		 1666 if (rc < 0)
1667 dev_kfree_skb(skb);
103b34cf
SO		 1668
1669 return;
1670}
1671
fc40a8c1 1672#define ATR_REQ_GB_OFFSET 17
b5193e5d 1673static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1674{
b5193e5d 1675 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1676 size_t gb_len;
103b34cf 1677 int rc;
ad3823ce
SO		 1678
1679 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1680
b5193e5d 1681 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1682 return -EINVAL;
1683
b5193e5d
WR		 1684 mode = resp->data[0];
1685 cmd = &resp->data[1];
ad3823ce 1686
b5193e5d
WR		 1687 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1688 mode, resp->len);
ad3823ce 1689
b5193e5d
WR		 1690 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1691 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1692 comm_mode = NFC_COMM_ACTIVE;
1693
b5193e5d 1694 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1695 return -EOPNOTSUPP;
1696
b5193e5d
WR		 1697 gb = cmd + ATR_REQ_GB_OFFSET;
1698 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1699
103b34cf
SO		 1700 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1701 comm_mode, gb, gb_len);
1702 if (rc < 0) {
1703 nfc_dev_err(&dev->interface->dev,
1704 "Error when signaling target activation");
1705 return rc;
1706 }
1707
51ad304c 1708 dev->tgt_mode = 1;
103b34cf
SO		 1709 queue_work(dev->wq, &dev->tg_work);
1710
1711 return 0;
fe7c5800
SO		 1712}
1713
6fbbdc16 1714static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1715{
37cf4fc6 1716 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1717
1718 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1719
6fbbdc16
SO		 1720 dev->cancel_listen = 1;
1721
6fbbdc16
SO		 1722 pn533_poll_next_mod(dev);
1723
46f793b0
SO		 1724 queue_delayed_work(dev->wq, &dev->poll_work,
1725 msecs_to_jiffies(PN533_POLL_INTERVAL));
6fbbdc16
SO		 1726}
1727
17e9d9d4
SO		 1728static int pn533_rf_complete(struct pn533 *dev, void *arg,
1729 struct sk_buff *resp)
1730{
1731 int rc = 0;
1732
1733 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1734
1735 if (IS_ERR(resp)) {
1736 rc = PTR_ERR(resp);
1737
1738 nfc_dev_err(&dev->interface->dev, "%s RF setting error %d",
1739 __func__, rc);
1740
1741 return rc;
1742 }
1743
46f793b0
SO		 1744 queue_delayed_work(dev->wq, &dev->poll_work,
1745 msecs_to_jiffies(PN533_POLL_INTERVAL));
17e9d9d4
SO		 1746
1747 dev_kfree_skb(resp);
1748 return rc;
1749}
1750
1751static void pn533_wq_rf(struct work_struct *work)
1752{
1753 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1754 struct sk_buff *skb;
1755 int rc;
1756
1757 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1758
1759 skb = pn533_alloc_skb(dev, 2);
1760 if (!skb)
1761 return;
1762
1763 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
3a8eab39 1764 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
17e9d9d4
SO		 1765
1766 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1767 pn533_rf_complete, NULL);
1768 if (rc < 0) {
1769 dev_kfree_skb(skb);
1770 nfc_dev_err(&dev->interface->dev, "RF setting error %d", rc);
1771 }
1772
1773 return;
1774}
1775
6fbbdc16 1776static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1777 struct sk_buff *resp)
6fbbdc16
SO		 1778{
1779 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1780 int rc;
1781
6fbbdc16 1782 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1783
b5193e5d
WR		 1784 if (IS_ERR(resp)) {
1785 rc = PTR_ERR(resp);
1786
1787 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1788 __func__, rc);
1789
1790 if (rc == -ENOENT) {
1791 if (dev->poll_mod_count != 0)
1792 return rc;
1793 else
1794 goto stop_poll;
1795 } else if (rc < 0) {
1796 nfc_dev_err(&dev->interface->dev,
1797 "Error %d when running poll", rc);
1798 goto stop_poll;
1799 }
6fbbdc16 1800 }
ad3823ce 1801
6fbbdc16
SO		 1802 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1803
b5193e5d 1804 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1805 del_timer(&dev->listen_timer);
b5193e5d
WR		 1806 rc = pn533_init_target_complete(dev, resp);
1807 goto done;
6fbbdc16
SO		 1808 }
1809
b5193e5d
WR		 1810 /* Initiator mode */
1811 rc = pn533_start_poll_complete(dev, resp);
1812 if (!rc)
1813 goto done;
6fbbdc16 1814
95cb9e10 1815 if (!dev->poll_mod_count) {
8b513d0c 1816 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
95cb9e10
WR		 1817 goto done;
1818 }
1819
b5193e5d 1820 pn533_poll_next_mod(dev);
17e9d9d4
SO		 1821 /* Not target found, turn radio off */
1822 queue_work(dev->wq, &dev->rf_work);
6fbbdc16 1823
b5193e5d
WR		 1824done:
1825 dev_kfree_skb(resp);
1826 return rc;
6fbbdc16
SO		 1827
1828stop_poll:
b5193e5d
WR		 1829 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1830
6fbbdc16
SO		 1831 pn533_poll_reset_mod_list(dev);
1832 dev->poll_protocols = 0;
b5193e5d 1833 return rc;
ad3823ce
SO		 1834}
1835
9e2d493e
WR		 1836static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1837 struct pn533_poll_modulations *mod)
c46ee386 1838{
b5193e5d 1839 struct sk_buff *skb;
c46ee386 1840
9e2d493e 1841 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1842 if (!skb)
1843 return NULL;
c46ee386 1844
b5193e5d 1845 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1846
b5193e5d 1847 return skb;
6fbbdc16 1848}
c46ee386 1849
6fbbdc16
SO		 1850static int pn533_send_poll_frame(struct pn533 *dev)
1851{
b5193e5d
WR		 1852 struct pn533_poll_modulations *mod;
1853 struct sk_buff *skb;
6fbbdc16 1854 int rc;
b5193e5d 1855 u8 cmd_code;
c46ee386 1856
b5193e5d 1857 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1858
b5193e5d
WR		 1859 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1860 __func__, mod->len);
c46ee386 1861
b5193e5d
WR		 1862 if (mod->len == 0) { /* Listen mode */
1863 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1864 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1865 } else { /* Polling mode */
1866 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1867 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1868 }
1869
1870 if (!skb) {
1871 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1872 return -ENOMEM;
1873 }
1874
1875 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1876 NULL);
1877 if (rc < 0) {
1878 dev_kfree_skb(skb);
6fbbdc16 1879 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1880 }
c46ee386 1881
6fbbdc16
SO		 1882 return rc;
1883}
1884
1885static void pn533_wq_poll(struct work_struct *work)
1886{
46f793b0 1887 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
6fbbdc16
SO		 1888 struct pn533_poll_modulations *cur_mod;
1889 int rc;
1890
1891 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1892
1893 nfc_dev_dbg(&dev->interface->dev,
1894 "%s cancel_listen %d modulation len %d",
1895 __func__, dev->cancel_listen, cur_mod->len);
1896
1897 if (dev->cancel_listen == 1) {
1898 dev->cancel_listen = 0;
10cff29a 1899 pn533_abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1900 }
1901
6fbbdc16
SO		 1902 rc = pn533_send_poll_frame(dev);
1903 if (rc)
1904 return;
c46ee386 1905
6fbbdc16
SO		 1906 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1907 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1908
6fbbdc16 1909 return;
c46ee386
AAJ		 1910}
1911
fe7c5800
SO		 1912static int pn533_start_poll(struct nfc_dev *nfc_dev,
1913 u32 im_protocols, u32 tm_protocols)
1914{
1915 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1916
1917 nfc_dev_dbg(&dev->interface->dev,
1918 "%s: im protocols 0x%x tm protocols 0x%x",
1919 __func__, im_protocols, tm_protocols);
1920
1921 if (dev->tgt_active_prot) {
1922 nfc_dev_err(&dev->interface->dev,
1923 "Cannot poll with a target already activated");
1924 return -EBUSY;
1925 }
1926
51ad304c
SO		 1927 if (dev->tgt_mode) {
1928 nfc_dev_err(&dev->interface->dev,
1929 "Cannot poll while already being activated");
1930 return -EBUSY;
1931 }
1932
6fbbdc16
SO		 1933 if (tm_protocols) {
1934 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1935 if (dev->gb == NULL)
1936 tm_protocols = 0;
1937 }
ad3823ce 1938
6fbbdc16
SO		 1939 dev->poll_mod_curr = 0;
1940 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1941 dev->poll_protocols = im_protocols;
1942 dev->listen_protocols = tm_protocols;
ad3823ce 1943
6fbbdc16 1944 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1945}
1946
c46ee386
AAJ		 1947static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1948{
1949 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1950
1951 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1952
6fbbdc16
SO		 1953 del_timer(&dev->listen_timer);
1954
c46ee386 1955 if (!dev->poll_mod_count) {
6ca55372
WR		 1956 nfc_dev_dbg(&dev->interface->dev,
1957 "Polling operation was not running");
c46ee386
AAJ		 1958 return;
1959 }
1960
10cff29a 1961 pn533_abort_cmd(dev, GFP_KERNEL);
46f793b0 1962 flush_delayed_work(&dev->poll_work);
7c2a04a9 1963 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1964}
1965
1966static int pn533_activate_target_nfcdep(struct pn533 *dev)
1967{
cb950d93 1968 struct pn533_cmd_activate_response *rsp;
541d920b 1969 u16 gt_len;
c46ee386
AAJ		 1970 int rc;
1971
cb950d93
WR		 1972 struct sk_buff *skb;
1973 struct sk_buff *resp;
c46ee386 1974
cb950d93 1975 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1976
9e2d493e 1977 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1978 if (!skb)
1979 return -ENOMEM;
c46ee386 1980
cb950d93
WR		 1981 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1982 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1983
cb950d93
WR		 1984 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1985 if (IS_ERR(resp))
1986 return PTR_ERR(resp);
c46ee386 1987
37cf4fc6 1988 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1989 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1990 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1991 nfc_dev_err(&dev->interface->dev,
1992 "Target activation failed (error 0x%x)", rc);
cb950d93 1993 dev_kfree_skb(resp);
c46ee386 1994 return -EIO;
8a0ecfe7 1995 }
c46ee386 1996
541d920b 1997 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1998 gt_len = resp->len - 16;
1999 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 2000
cb950d93 2001 dev_kfree_skb(resp);
541d920b 2002 return rc;
c46ee386
AAJ		 2003}
2004
90099433
EL		 2005static int pn533_activate_target(struct nfc_dev *nfc_dev,
2006 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 2007{
2008 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2009 int rc;
2010
2011 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 2012 protocol);
c46ee386
AAJ		 2013
2014 if (dev->poll_mod_count) {
6ca55372
WR		 2015 nfc_dev_err(&dev->interface->dev,
2016 "Cannot activate while polling");
c46ee386
AAJ		 2017 return -EBUSY;
2018 }
2019
2020 if (dev->tgt_active_prot) {
6ca55372
WR		 2021 nfc_dev_err(&dev->interface->dev,
2022 "There is already an active target");
c46ee386
AAJ		 2023 return -EBUSY;
2024 }
2025
2026 if (!dev->tgt_available_prots) {
6ca55372
WR		 2027 nfc_dev_err(&dev->interface->dev,
2028 "There is no available target to activate");
c46ee386
AAJ		 2029 return -EINVAL;
2030 }
2031
2032 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 2033 nfc_dev_err(&dev->interface->dev,
2034 "Target doesn't support requested proto %u",
2035 protocol);
c46ee386
AAJ		 2036 return -EINVAL;
2037 }
2038
2039 if (protocol == NFC_PROTO_NFC_DEP) {
2040 rc = pn533_activate_target_nfcdep(dev);
2041 if (rc) {
6ca55372
WR		 2042 nfc_dev_err(&dev->interface->dev,
2043 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 2044 return rc;
2045 }
2046 }
2047
2048 dev->tgt_active_prot = protocol;
2049 dev->tgt_available_prots = 0;
2050
2051 return 0;
2052}
2053
90099433
EL		 2054static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
2055 struct nfc_target *target)
c46ee386
AAJ		 2056{
2057 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 2058
2059 struct sk_buff *skb;
2060 struct sk_buff *resp;
2061
c46ee386
AAJ		 2062 int rc;
2063
2064 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2065
2066 if (!dev->tgt_active_prot) {
2067 nfc_dev_err(&dev->interface->dev, "There is no active target");
2068 return;
2069 }
2070
2071 dev->tgt_active_prot = 0;
6ff73fd2
SO		 2072 skb_queue_purge(&dev->resp_q);
2073
9e2d493e 2074 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2075 if (!skb)
2076 return;
c46ee386 2077
cb950d93 2078 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 2079
cb950d93
WR		 2080 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2081 if (IS_ERR(resp))
c46ee386 2082 return;
c46ee386 2083
cb950d93 2084 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 2085 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 2086 nfc_dev_err(&dev->interface->dev,
2087 "Error 0x%x when releasing the target", rc);
c46ee386 2088
cb950d93 2089 dev_kfree_skb(resp);
c46ee386
AAJ		 2090 return;
2091}
2092
361f3cb7
SO		 2093
2094static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 2095 struct sk_buff *resp)
361f3cb7 2096{
13003649 2097 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 2098 u8 target_gt_len;
2099 int rc;
13003649 2100 u8 active = *(u8 *)arg;
70418e6e
WR		 2101
2102 kfree(arg);
361f3cb7 2103
13003649
WR		 2104 if (IS_ERR(resp))
2105 return PTR_ERR(resp);
361f3cb7
SO		 2106
2107 if (dev->tgt_available_prots &&
2108 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2109 nfc_dev_err(&dev->interface->dev,
5d467742 2110 "The target does not support DEP");
13003649
WR		 2111 rc = -EINVAL;
2112 goto error;
361f3cb7
SO		 2113 }
2114
13003649
WR		 2115 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2116
2117 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 2118 if (rc != PN533_CMD_RET_SUCCESS) {
2119 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2120 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 2121 goto error;
361f3cb7
SO		 2122 }
2123
2124 if (!dev->tgt_available_prots) {
13003649
WR		 2125 struct nfc_target nfc_target;
2126
361f3cb7
SO		 2127 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2128
2129 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 2130 nfc_target.nfcid1_len = 10;
13003649 2131 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 2132 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2133 if (rc)
13003649 2134 goto error;
361f3cb7
SO		 2135
2136 dev->tgt_available_prots = 0;
2137 }
2138
2139 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2140
2141 /* ATR_RES general bytes are located at offset 17 */
13003649 2142 target_gt_len = resp->len - 17;
361f3cb7 2143 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 2144 rsp->gt, target_gt_len);
361f3cb7
SO		 2145 if (rc == 0)
2146 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 2147 dev->nfc_dev->targets[0].idx,
2148 !active, NFC_RF_INITIATOR);
361f3cb7 2149
13003649
WR		 2150error:
2151 dev_kfree_skb(resp);
2152 return rc;
361f3cb7
SO		 2153}
2154
17e9d9d4 2155static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
d7f3345d 2156#define PASSIVE_DATA_LEN 5
90099433 2157static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 2158 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 2159{
2160 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649 2161 struct sk_buff *skb;
5eef4845
SO		 2162 int rc, skb_len;
2163 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
13003649 2164
d7f3345d 2165 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 2166
2167 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2168
361f3cb7
SO		 2169 if (dev->poll_mod_count) {
2170 nfc_dev_err(&dev->interface->dev,
5d467742 2171 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 2172 return -EBUSY;
2173 }
2174
2175 if (dev->tgt_active_prot) {
2176 nfc_dev_err(&dev->interface->dev,
5d467742 2177 "There is already an active target");
361f3cb7
SO		 2178 return -EBUSY;
2179 }
2180
13003649 2181 skb_len = 3 + gb_len; /* ActPass + BR + Next */
5eef4845 2182 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2183
5eef4845
SO		 2184 /* NFCID3 */
2185 skb_len += NFC_NFCID3_MAXSIZE;
2186 if (target && !target->nfcid2_len) {
2187 nfcid3[0] = 0x1;
2188 nfcid3[1] = 0xfe;
2189 get_random_bytes(nfcid3 + 2, 6);
2190 }
322bce95 2191
9e2d493e 2192 skb = pn533_alloc_skb(dev, skb_len);
13003649 2193 if (!skb)
361f3cb7
SO		 2194 return -ENOMEM;
2195
13003649 2196 *skb_put(skb, 1) = !comm_mode; /* ActPass */
5eef4845 2197 *skb_put(skb, 1) = 0x02; /* 424 kbps */
13003649
WR		 2198
2199 next = skb_put(skb, 1); /* Next */
2200 *next = 0;
361f3cb7 2201
5eef4845
SO		 2202 /* Copy passive data */
2203 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2204 *next |= 1;
d7f3345d 2205
5eef4845
SO		 2206 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2207 if (target && target->nfcid2_len)
322bce95
SO		 2208 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2209 target->nfcid2_len);
5eef4845
SO		 2210 else
2211 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2212 NFC_NFCID3_MAXSIZE);
2213 *next |= 2;
322bce95 2214
47807d3d 2215 if (gb != NULL && gb_len > 0) {
13003649
WR		 2216 memcpy(skb_put(skb, gb_len), gb, gb_len);
2217 *next |= 4; /* We have some Gi */
361f3cb7 2218 } else {
13003649 2219 *next = 0;
361f3cb7
SO		 2220 }
2221
13003649
WR		 2222 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2223 if (!arg) {
2224 dev_kfree_skb(skb);
2225 return -ENOMEM;
2226 }
361f3cb7 2227
13003649 2228 *arg = !comm_mode;
361f3cb7 2229
17e9d9d4
SO		 2230 pn533_rf_field(dev->nfc_dev, 0);
2231
13003649
WR		 2232 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2233 pn533_in_dep_link_up_complete, arg);
2234
2235 if (rc < 0) {
2236 dev_kfree_skb(skb);
2237 kfree(arg);
2238 }
361f3cb7
SO		 2239
2240 return rc;
2241}
2242
2243static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2244{
6fbbdc16
SO		 2245 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2246
fcfafc76
WR		 2247 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2248
6fbbdc16
SO		 2249 pn533_poll_reset_mod_list(dev);
2250
10cff29a
WR		 2251 if (dev->tgt_mode || dev->tgt_active_prot)
2252 pn533_abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 2253
2254 dev->tgt_active_prot = 0;
2255 dev->tgt_mode = 0;
2256
2257 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2258
2259 return 0;
2260}
2261
c46ee386 2262struct pn533_data_exchange_arg {
c46ee386
AAJ		 2263 data_exchange_cb_t cb;
2264 void *cb_context;
2265};
2266
6ff73fd2
SO		 2267static struct sk_buff *pn533_build_response(struct pn533 *dev)
2268{
2269 struct sk_buff *skb, *tmp, *t;
2270 unsigned int skb_len = 0, tmp_len = 0;
2271
fcfafc76 2272 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2273
2274 if (skb_queue_empty(&dev->resp_q))
2275 return NULL;
2276
2277 if (skb_queue_len(&dev->resp_q) == 1) {
2278 skb = skb_dequeue(&dev->resp_q);
2279 goto out;
2280 }
2281
2282 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2283 skb_len += tmp->len;
2284
2285 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2286 __func__, skb_len);
2287
2288 skb = alloc_skb(skb_len, GFP_KERNEL);
2289 if (skb == NULL)
2290 goto out;
2291
2292 skb_put(skb, skb_len);
2293
2294 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2295 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2296 tmp_len += tmp->len;
2297 }
2298
2299out:
2300 skb_queue_purge(&dev->resp_q);
2301
2302 return skb;
2303}
2304
c46ee386 2305static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2306 struct sk_buff *resp)
c46ee386
AAJ		 2307{
2308 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2309 struct sk_buff *skb;
2310 int rc = 0;
2311 u8 status, ret, mi;
c46ee386
AAJ		 2312
2313 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2314
b1e666f5
WR		 2315 if (IS_ERR(resp)) {
2316 rc = PTR_ERR(resp);
2317 goto _error;
c46ee386
AAJ		 2318 }
2319
b1e666f5
WR		 2320 status = resp->data[0];
2321 ret = status & PN533_CMD_RET_MASK;
2322 mi = status & PN533_CMD_MI_MASK;
2323
2324 skb_pull(resp, sizeof(status));
c46ee386 2325
b1e666f5
WR		 2326 if (ret != PN533_CMD_RET_SUCCESS) {
2327 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2328 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2329 rc = -EIO;
c46ee386
AAJ		 2330 goto error;
2331 }
2332
b1e666f5 2333 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2334
b1e666f5
WR		 2335 if (mi) {
2336 dev->cmd_complete_mi_arg = arg;
963a82e0
OG		 2337 queue_work(dev->wq, &dev->mi_rx_work);
2338 return -EINPROGRESS;
2339 }
2340
2341 /* Prepare for the next round */
2342 if (skb_queue_len(&dev->fragment_skb) > 0) {
2343 dev->cmd_complete_dep_arg = arg;
2344 queue_work(dev->wq, &dev->mi_tx_work);
2345
6ff73fd2 2346 return -EINPROGRESS;
c46ee386
AAJ		 2347 }
2348
6ff73fd2 2349 skb = pn533_build_response(dev);
b1e666f5 2350 if (!skb)
6ff73fd2 2351 goto error;
c46ee386 2352
6ff73fd2 2353 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2354 kfree(arg);
2355 return 0;
2356
2357error:
b1e666f5
WR		 2358 dev_kfree_skb(resp);
2359_error:
6ff73fd2 2360 skb_queue_purge(&dev->resp_q);
b1e666f5 2361 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2362 kfree(arg);
b1e666f5 2363 return rc;
c46ee386
AAJ		 2364}
2365
963a82e0
OG		 2366/* Split the Tx skb into small chunks */
2367static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2368{
2369 struct sk_buff *frag;
2370 int frag_size;
2371
2372 do {
2373 /* Remaining size */
2374 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2375 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2376 else
2377 frag_size = skb->len;
2378
2379 /* Allocate and reserve */
2380 frag = pn533_alloc_skb(dev, frag_size);
2381 if (!frag) {
2382 skb_queue_purge(&dev->fragment_skb);
2383 break;
2384 }
2385
2386 /* Reserve the TG/MI byte */
2387 skb_reserve(frag, 1);
2388
2389 /* MI + TG */
2390 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2391 *skb_push(frag, sizeof(u8)) = (PN533_CMD_MI_MASK | 1);
2392 else
2393 *skb_push(frag, sizeof(u8)) = 1; /* TG */
2394
2395 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2396
2397 /* Reduce the size of incoming buffer */
2398 skb_pull(skb, frag_size);
2399
2400 /* Add this to skb_queue */
2401 skb_queue_tail(&dev->fragment_skb, frag);
2402
2403 } while (skb->len > 0);
2404
2405 dev_kfree_skb(skb);
2406
2407 return skb_queue_len(&dev->fragment_skb);
2408}
2409
be9ae4ce
SO		 2410static int pn533_transceive(struct nfc_dev *nfc_dev,
2411 struct nfc_target *target, struct sk_buff *skb,
2412 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2413{
2414 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2415 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2416 int rc;
2417
2418 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2419
2420 if (!dev->tgt_active_prot) {
6ca55372
WR		 2421 nfc_dev_err(&dev->interface->dev,
2422 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2423 rc = -EINVAL;
2424 goto error;
2425 }
2426
b1e666f5 2427 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2428 if (!arg) {
2429 rc = -ENOMEM;
b1e666f5 2430 goto error;
c46ee386
AAJ		 2431 }
2432
c46ee386
AAJ		 2433 arg->cb = cb;
2434 arg->cb_context = cb_context;
2435
b1e666f5
WR		 2436 switch (dev->device_type) {
2437 case PN533_DEVICE_PASORI:
2438 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2439 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2440 skb,
2441 pn533_data_exchange_complete,
2442 arg);
2443
2444 break;
2445 }
2446 default:
963a82e0
OG		 2447 /* jumbo frame ? */
2448 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2449 rc = pn533_fill_fragment_skbs(dev, skb);
2450 if (rc <= 0)
2451 goto error;
2452
2453 skb = skb_dequeue(&dev->fragment_skb);
2454 if (!skb) {
2455 rc = -EIO;
2456 goto error;
2457 }
2458 } else {
2459 *skb_push(skb, sizeof(u8)) = 1; /* TG */
2460 }
b1e666f5
WR		 2461
2462 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2463 skb, pn533_data_exchange_complete,
2464 arg);
2465
2466 break;
c46ee386
AAJ		 2467 }
2468
b1e666f5
WR		 2469 if (rc < 0) /* rc from send_async */
2470 goto error;
2471
c46ee386
AAJ		 2472 return 0;
2473
c46ee386 2474error:
b1e666f5
WR		 2475 kfree(arg);
2476 dev_kfree_skb(skb);
c46ee386
AAJ		 2477 return rc;
2478}
2479
dadb06f2 2480static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2481 struct sk_buff *resp)
dadb06f2 2482{
e4878823 2483 u8 status;
5b412fd1 2484
dadb06f2
SO		 2485 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2486
e4878823
WR		 2487 if (IS_ERR(resp))
2488 return PTR_ERR(resp);
5b412fd1 2489
e4878823 2490 status = resp->data[0];
dadb06f2 2491
e4878823 2492 dev_kfree_skb(resp);
dadb06f2 2493
e4878823 2494 if (status != 0) {
dadb06f2
SO		 2495 nfc_tm_deactivated(dev->nfc_dev);
2496
51ad304c
SO		 2497 dev->tgt_mode = 0;
2498
dadb06f2
SO		 2499 return 0;
2500 }
2501
2502 queue_work(dev->wq, &dev->tg_work);
2503
2504 return 0;
2505}
2506
2507static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2508{
2509 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2510 int rc;
2511
2512 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2513
e4878823 2514 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2515 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2516 "Data length greater than the max allowed: %d",
2517 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2518 return -ENOSYS;
dadb06f2
SO		 2519 }
2520
e4878823
WR		 2521 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2522 pn533_tm_send_complete, NULL);
2523 if (rc < 0)
2524 dev_kfree_skb(skb);
dadb06f2
SO		 2525
2526 return rc;
2527}
2528
6ff73fd2
SO		 2529static void pn533_wq_mi_recv(struct work_struct *work)
2530{
963a82e0 2531 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
b1e666f5
WR		 2532
2533 struct sk_buff *skb;
6ff73fd2
SO		 2534 int rc;
2535
2536 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2537
9e2d493e 2538 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2539 if (!skb)
2540 goto error;
6ff73fd2 2541
b1e666f5
WR		 2542 switch (dev->device_type) {
2543 case PN533_DEVICE_PASORI:
2544 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2545 rc = pn533_send_cmd_direct_async(dev,
2546 PN533_CMD_IN_COMM_THRU,
2547 skb,
2548 pn533_data_exchange_complete,
2549 dev->cmd_complete_mi_arg);
6ff73fd2 2550
b1e666f5
WR		 2551 break;
2552 }
2553 default:
2554 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2555
b1e666f5
WR		 2556 rc = pn533_send_cmd_direct_async(dev,
2557 PN533_CMD_IN_DATA_EXCHANGE,
2558 skb,
2559 pn533_data_exchange_complete,
2560 dev->cmd_complete_mi_arg);
b1bb290a 2561
b1e666f5 2562 break;
6ff73fd2
SO		 2563 }
2564
b1e666f5 2565 if (rc == 0) /* success */
6ff73fd2
SO		 2566 return;
2567
b1e666f5
WR		 2568 nfc_dev_err(&dev->interface->dev,
2569 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2570
b1e666f5 2571 dev_kfree_skb(skb);
140ef7f6 2572 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2573
b1e666f5 2574error:
6ff73fd2 2575 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2576 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2577}
2578
963a82e0
OG		 2579static void pn533_wq_mi_send(struct work_struct *work)
2580{
2581 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2582 struct sk_buff *skb;
2583 int rc;
2584
2585 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2586
2587 /* Grab the first skb in the queue */
2588 skb = skb_dequeue(&dev->fragment_skb);
2589
2590 if (skb == NULL) { /* No more data */
2591 /* Reset the queue for future use */
2592 skb_queue_head_init(&dev->fragment_skb);
2593 goto error;
2594 }
2595
2596 switch (dev->device_type) {
2597 case PN533_DEVICE_PASORI:
2598 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2599 rc = -EIO;
2600 break;
2601 }
2602
2603 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2604 skb,
2605 pn533_data_exchange_complete,
2606 dev->cmd_complete_dep_arg);
2607
2608 break;
2609
2610 default:
2611 /* Still some fragments? */
2612 rc = pn533_send_cmd_direct_async(dev,PN533_CMD_IN_DATA_EXCHANGE,
2613 skb,
2614 pn533_data_exchange_complete,
2615 dev->cmd_complete_dep_arg);
2616
2617 break;
2618 }
2619
2620 if (rc == 0) /* success */
2621 return;
2622
2623 nfc_dev_err(&dev->interface->dev,
2624 "Error %d when trying to perform data_exchange", rc);
2625
2626 dev_kfree_skb(skb);
2627 kfree(dev->cmd_complete_dep_arg);
2628
2629error:
2630 pn533_send_ack(dev, GFP_KERNEL);
2631 queue_work(dev->wq, &dev->cmd_work);
2632}
2633
c46ee386
AAJ		 2634static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2635 u8 cfgdata_len)
2636{
cb950d93
WR		 2637 struct sk_buff *skb;
2638 struct sk_buff *resp;
2639
2640 int skb_len;
c46ee386
AAJ		 2641
2642 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2643
cb950d93 2644 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2645
9e2d493e 2646 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2647 if (!skb)
2648 return -ENOMEM;
c46ee386 2649
cb950d93
WR		 2650 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2651 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2652
cb950d93
WR		 2653 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2654 if (IS_ERR(resp))
2655 return PTR_ERR(resp);
c46ee386 2656
cb950d93
WR		 2657 dev_kfree_skb(resp);
2658 return 0;
2659}
2660
2661static int pn533_get_firmware_version(struct pn533 *dev,
2662 struct pn533_fw_version *fv)
2663{
2664 struct sk_buff *skb;
2665 struct sk_buff *resp;
2666
9e2d493e 2667 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2668 if (!skb)
2669 return -ENOMEM;
2670
2671 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2672 if (IS_ERR(resp))
2673 return PTR_ERR(resp);
2674
2675 fv->ic = resp->data[0];
2676 fv->ver = resp->data[1];
2677 fv->rev = resp->data[2];
2678 fv->support = resp->data[3];
2679
2680 dev_kfree_skb(resp);
2681 return 0;
c46ee386
AAJ		 2682}
2683
f75c2913 2684static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2685{
cb950d93
WR		 2686 struct sk_buff *skb;
2687 struct sk_buff *resp;
5c7b0531
SO		 2688
2689 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2690
9e2d493e 2691 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2692 if (!skb)
2693 return -ENOMEM;
5c7b0531 2694
cb950d93 2695 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2696
cb950d93
WR		 2697 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2698 if (IS_ERR(resp))
2699 return PTR_ERR(resp);
5c7b0531 2700
cb950d93 2701 dev_kfree_skb(resp);
5c7b0531 2702
94c5c156 2703 return 0;
5c7b0531
SO		 2704}
2705
53cf4839
WR		 2706struct pn533_acr122_poweron_rdr_arg {
2707 int rc;
2708 struct completion done;
2709};
2710
2711static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2712{
2713 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2714
2715 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2716
86eca4e7 2717 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2718 urb->transfer_buffer, urb->transfer_buffer_length,
2719 false);
2720
2721 arg->rc = urb->status;
2722 complete(&arg->done);
2723}
2724
2725static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2726{
2727 /* Power on th reader (CCID cmd) */
2728 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2729 0, 0, 0, 0, 0, 0, 3, 0, 0};
2730 u8 buf[255];
2731 int rc;
2732 void *cntx;
2733 struct pn533_acr122_poweron_rdr_arg arg;
2734
2735 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2736
2737 init_completion(&arg.done);
2738 cntx = dev->in_urb->context; /* backup context */
2739
2740 dev->in_urb->transfer_buffer = buf;
2741 dev->in_urb->transfer_buffer_length = 255;
2742 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2743 dev->in_urb->context = &arg;
2744
2745 dev->out_urb->transfer_buffer = cmd;
2746 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2747
86eca4e7 2748 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2749 cmd, sizeof(cmd), false);
2750
2751 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2752 if (rc) {
2753 nfc_dev_err(&dev->interface->dev,
2754 "Reader power on cmd error %d", rc);
2755 return rc;
2756 }
2757
2758 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2759 if (rc) {
2760 nfc_dev_err(&dev->interface->dev,
2761 "Can't submit for reader power on cmd response %d",
2762 rc);
2763 return rc;
2764 }
2765
2766 wait_for_completion(&arg.done);
2767 dev->in_urb->context = cntx; /* restore context */
2768
2769 return arg.rc;
2770}
2771
60d9edd5
SO		 2772static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2773{
2774 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2775 u8 rf_field = !!rf;
2776 int rc;
2777
3a8eab39
SO		 2778 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2779
60d9edd5
SO		 2780 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2781 (u8 *)&rf_field, 1);
2782 if (rc) {
2783 nfc_dev_err(&dev->interface->dev,
2784 "Error on setting RF field");
2785 return rc;
2786 }
2787
2788 return rc;
2789}
2790
2791int pn533_dev_up(struct nfc_dev *nfc_dev)
2792{
2793 return pn533_rf_field(nfc_dev, 1);
2794}
2795
2796int pn533_dev_down(struct nfc_dev *nfc_dev)
2797{
2798 return pn533_rf_field(nfc_dev, 0);
2799}
2800
5c7b0531 2801static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2802 .dev_up = pn533_dev_up,
2803 .dev_down = pn533_dev_down,
361f3cb7
SO		 2804 .dep_link_up = pn533_dep_link_up,
2805 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2806 .start_poll = pn533_start_poll,
2807 .stop_poll = pn533_stop_poll,
2808 .activate_target = pn533_activate_target,
2809 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2810 .im_transceive = pn533_transceive,
dadb06f2 2811 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2812};
2813
5c7b0531
SO		 2814static int pn533_setup(struct pn533 *dev)
2815{
2816 struct pn533_config_max_retries max_retries;
2817 struct pn533_config_timing timing;
2818 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2819 int rc;
2820
2821 switch (dev->device_type) {
2822 case PN533_DEVICE_STD:
5c7b0531 2823 case PN533_DEVICE_PASORI:
53cf4839 2824 case PN533_DEVICE_ACR122U:
5c7b0531
SO		 2825 max_retries.mx_rty_atr = 0x2;
2826 max_retries.mx_rty_psl = 0x1;
2827 max_retries.mx_rty_passive_act =
2828 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2829
2830 timing.rfu = PN533_CONFIG_TIMING_102;
2831 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2832 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2833
2834 break;
2835
2836 default:
2837 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2838 dev->device_type);
2839 return -EINVAL;
2840 }
2841
2842 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2843 (u8 *)&max_retries, sizeof(max_retries));
2844 if (rc) {
2845 nfc_dev_err(&dev->interface->dev,
2846 "Error on setting MAX_RETRIES config");
2847 return rc;
2848 }
2849
2850
2851 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2852 (u8 *)&timing, sizeof(timing));
2853 if (rc) {
2854 nfc_dev_err(&dev->interface->dev,
2855 "Error on setting RF timings");
2856 return rc;
2857 }
2858
2859 switch (dev->device_type) {
2860 case PN533_DEVICE_STD:
2861 break;
2862
2863 case PN533_DEVICE_PASORI:
f75c2913 2864 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2865
2866 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2867 pasori_cfg, 3);
2868 if (rc) {
2869 nfc_dev_err(&dev->interface->dev,
2870 "Error while settings PASORI config");
2871 return rc;
2872 }
2873
f75c2913 2874 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2875
2876 break;
2877 }
2878
2879 return 0;
2880}
2881
c46ee386
AAJ		 2882static int pn533_probe(struct usb_interface *interface,
2883 const struct usb_device_id *id)
2884{
cb950d93 2885 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2886 struct pn533 *dev;
2887 struct usb_host_interface *iface_desc;
2888 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2889 int in_endpoint = 0;
2890 int out_endpoint = 0;
2891 int rc = -ENOMEM;
2892 int i;
2893 u32 protocols;
2894
2895 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2896 if (!dev)
2897 return -ENOMEM;
2898
2899 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2900 dev->interface = interface;
0201ed03 2901 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2902
2903 iface_desc = interface->cur_altsetting;
2904 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2905 endpoint = &iface_desc->endpoint[i].desc;
2906
8d25ca79 2907 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2908 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2909
8d25ca79 2910 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2911 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2912 }
2913
2914 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2915 nfc_dev_err(&interface->dev,
2916 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2917 rc = -ENODEV;
2918 goto error;
2919 }
2920
c46ee386 2921 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2922 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2923
a5798094 2924 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2925 goto error;
2926
2927 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2928 usb_rcvbulkpipe(dev->udev, in_endpoint),
2929 NULL, 0, NULL, dev);
c46ee386 2930 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2931 usb_sndbulkpipe(dev->udev, out_endpoint),
2932 NULL, 0, pn533_send_complete, dev);
c46ee386 2933
5d50b364
SO		 2934 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2935 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
963a82e0
OG		 2936 INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
2937 INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
103b34cf 2938 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
46f793b0 2939 INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
17e9d9d4 2940 INIT_WORK(&dev->rf_work, pn533_wq_rf);
58637c9b 2941 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2942 if (dev->wq == NULL)
2943 goto error;
c46ee386 2944
6fbbdc16
SO		 2945 init_timer(&dev->listen_timer);
2946 dev->listen_timer.data = (unsigned long) dev;
2947 dev->listen_timer.function = pn533_listen_mode_timer;
2948
6ff73fd2 2949 skb_queue_head_init(&dev->resp_q);
963a82e0 2950 skb_queue_head_init(&dev->fragment_skb);
6ff73fd2 2951
5d50b364
SO		 2952 INIT_LIST_HEAD(&dev->cmd_queue);
2953
c46ee386
AAJ		 2954 usb_set_intfdata(interface, dev);
2955
9e2d493e 2956 dev->ops = &pn533_std_frame_ops;
c46ee386 2957
58520373 2958 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
5c7b0531
SO		 2959 dev->device_type = id->driver_info;
2960 switch (dev->device_type) {
2961 case PN533_DEVICE_STD:
2962 protocols = PN533_ALL_PROTOCOLS;
2963 break;
2964
2965 case PN533_DEVICE_PASORI:
2966 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2967 break;
2968
53cf4839
WR		 2969 case PN533_DEVICE_ACR122U:
2970 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2971 dev->ops = &pn533_acr122_frame_ops;
2972 dev->protocol_type = PN533_PROTO_REQ_RESP,
2973
2974 rc = pn533_acr122_poweron_rdr(dev);
2975 if (rc < 0) {
2976 nfc_dev_err(&dev->interface->dev,
2977 "Couldn't poweron the reader (error %d)",
2978 rc);
2979 goto destroy_wq;
2980 }
2981 break;
2982
5c7b0531
SO		 2983 default:
2984 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2985 dev->device_type);
2986 rc = -EINVAL;
2987 goto destroy_wq;
2988 }
c46ee386 2989
9e2d493e
WR		 2990 memset(&fw_ver, 0, sizeof(fw_ver));
2991 rc = pn533_get_firmware_version(dev, &fw_ver);
2992 if (rc < 0)
2993 goto destroy_wq;
2994
2995 nfc_dev_info(&dev->interface->dev,
86eca4e7
OG		 2996 "NXP PN5%02X firmware ver %d.%d now attached",
2997 fw_ver.ic, fw_ver.ver, fw_ver.rev);
9e2d493e
WR		 2998
2999
e8753043 3000 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
9e2d493e 3001 dev->ops->tx_header_len +
e8753043 3002 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 3003 dev->ops->tx_tail_len);
4674d0fe
WY		 3004 if (!dev->nfc_dev) {
3005 rc = -ENOMEM;
4849f85e 3006 goto destroy_wq;
4674d0fe 3007 }
c46ee386
AAJ		 3008
3009 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
3010 nfc_set_drvdata(dev->nfc_dev, dev);
3011
3012 rc = nfc_register_device(dev->nfc_dev);
3013 if (rc)
3014 goto free_nfc_dev;
3015
5c7b0531
SO		 3016 rc = pn533_setup(dev);
3017 if (rc)
34a85bfc 3018 goto unregister_nfc_dev;
34a85bfc 3019
c46ee386
AAJ		 3020 return 0;
3021
9f2f8ba1
SO		 3022unregister_nfc_dev:
3023 nfc_unregister_device(dev->nfc_dev);
3024
c46ee386
AAJ		 3025free_nfc_dev:
3026 nfc_free_device(dev->nfc_dev);
9f2f8ba1 3027
4849f85e
SO		 3028destroy_wq:
3029 destroy_workqueue(dev->wq);
c46ee386 3030error:
c46ee386 3031 usb_free_urb(dev->in_urb);
c46ee386 3032 usb_free_urb(dev->out_urb);
7c5a54fb 3033 usb_put_dev(dev->udev);
c46ee386
AAJ		 3034 kfree(dev);
3035 return rc;
3036}
3037
3038static void pn533_disconnect(struct usb_interface *interface)
3039{
3040 struct pn533 *dev;
5d50b364 3041 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 3042
3043 dev = usb_get_intfdata(interface);
3044 usb_set_intfdata(interface, NULL);
3045
3046 nfc_unregister_device(dev->nfc_dev);
3047 nfc_free_device(dev->nfc_dev);
3048
3049 usb_kill_urb(dev->in_urb);
3050 usb_kill_urb(dev->out_urb);
3051
46f793b0 3052 flush_delayed_work(&dev->poll_work);
4849f85e 3053 destroy_workqueue(dev->wq);
c46ee386 3054
6ff73fd2
SO		 3055 skb_queue_purge(&dev->resp_q);
3056
6fbbdc16
SO		 3057 del_timer(&dev->listen_timer);
3058
5d50b364
SO		 3059 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
3060 list_del(&cmd->queue);
3061 kfree(cmd);
3062 }
3063
c46ee386 3064 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 3065 usb_free_urb(dev->out_urb);
3066 kfree(dev);
3067
276556db 3068 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 3069}
3070
3071static struct usb_driver pn533_driver = {
3072 .name = "pn533",
3073 .probe = pn533_probe,
3074 .disconnect = pn533_disconnect,
3075 .id_table = pn533_table,
3076};
3077
fe748483 3078module_usb_driver(pn533_driver);
c46ee386 3079
e70b96e9
WR		 3080MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
3081MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
3082MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 3083MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
3084MODULE_VERSION(VERSION);
3085MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.47671 seconds and 5 git commands to generate.