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NFC: pn533: Update copyrights note
[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
AAJ		 29
30#define VERSION "0.1"
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
5c7b0531
SO		 41#define PN533_DEVICE_STD 0x1
42#define PN533_DEVICE_PASORI 0x2
43
01d719a2
SO		 44#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
45 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
46 NFC_PROTO_NFC_DEP_MASK |\
47 NFC_PROTO_ISO14443_B_MASK)
5c7b0531
SO		 48
49#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
50 NFC_PROTO_MIFARE_MASK | \
51 NFC_PROTO_FELICA_MASK | \
01d719a2 52 NFC_PROTO_ISO14443_MASK | \
5c7b0531
SO		 53 NFC_PROTO_NFC_DEP_MASK)
54
c46ee386 55static const struct usb_device_id pn533_table[] = {
5c7b0531
SO		 56 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
57 .idVendor = PN533_VENDOR_ID,
58 .idProduct = PN533_PRODUCT_ID,
59 .driver_info = PN533_DEVICE_STD,
60 },
61 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
62 .idVendor = SCM_VENDOR_ID,
63 .idProduct = SCL3711_PRODUCT_ID,
64 .driver_info = PN533_DEVICE_STD,
65 },
66 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
67 .idVendor = SONY_VENDOR_ID,
68 .idProduct = PASORI_PRODUCT_ID,
69 .driver_info = PN533_DEVICE_PASORI,
70 },
c46ee386
AAJ		 71 { }
72};
73MODULE_DEVICE_TABLE(usb, pn533_table);
74
6fbbdc16
SO		 75/* How much time we spend listening for initiators */
76#define PN533_LISTEN_TIME 2
77
63123108
WR		 78/* Standard pn533 frame definitions */
79#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
b1bb290a 80 + 2) /* data[0] TFI, data[1] CC */
63123108 81#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82dec34d 82
15461aeb
WR		 83/*
84 * Max extended frame payload len, excluding TFI and CC
85 * which are already in PN533_FRAME_HEADER_LEN.
86 */
63123108 87#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
15461aeb 88
63123108 89#define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
5b5a4437 90 Postamble (1) */
63123108
WR		 91#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
92#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
c46ee386
AAJ		 93
94/* start of frame */
63123108 95#define PN533_STD_FRAME_SOF 0x00FF
c46ee386 96
63123108
WR		 97/* standard frame identifier: in/out/error */
98#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
99#define PN533_STD_FRAME_DIR_OUT 0xD4
100#define PN533_STD_FRAME_DIR_IN 0xD5
c46ee386
AAJ		 101
102/* PN533 Commands */
63123108 103#define PN533_STD_FRAME_CMD(f) (f->data[1])
c46ee386
AAJ		 104
105#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
106#define PN533_CMD_RF_CONFIGURATION 0x32
107#define PN533_CMD_IN_DATA_EXCHANGE 0x40
5c7b0531 108#define PN533_CMD_IN_COMM_THRU 0x42
c46ee386
AAJ		 109#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
110#define PN533_CMD_IN_ATR 0x50
111#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 112#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 113
ad3823ce 114#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 115#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 116#define PN533_CMD_TG_SET_DATA 0x8e
aada17ac 117#define PN533_CMD_UNDEF 0xff
ad3823ce 118
c46ee386
AAJ		 119#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
120
121/* PN533 Return codes */
122#define PN533_CMD_RET_MASK 0x3F
123#define PN533_CMD_MI_MASK 0x40
124#define PN533_CMD_RET_SUCCESS 0x00
125
126struct pn533;
127
0c33d262 128typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, int status);
c46ee386 129
aada17ac
WR		 130typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
131 struct sk_buff *resp);
132
c46ee386
AAJ		 133/* structs for pn533 commands */
134
135/* PN533_CMD_GET_FIRMWARE_VERSION */
136struct pn533_fw_version {
137 u8 ic;
138 u8 ver;
139 u8 rev;
140 u8 support;
141};
142
143/* PN533_CMD_RF_CONFIGURATION */
34a85bfc 144#define PN533_CFGITEM_TIMING 0x02
c46ee386 145#define PN533_CFGITEM_MAX_RETRIES 0x05
5c7b0531 146#define PN533_CFGITEM_PASORI 0x82
c46ee386 147
34a85bfc
SO		 148#define PN533_CONFIG_TIMING_102 0xb
149#define PN533_CONFIG_TIMING_204 0xc
150#define PN533_CONFIG_TIMING_409 0xd
151#define PN533_CONFIG_TIMING_819 0xe
152
c46ee386
AAJ		 153#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
154#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
155
156struct pn533_config_max_retries {
157 u8 mx_rty_atr;
158 u8 mx_rty_psl;
159 u8 mx_rty_passive_act;
160} __packed;
161
34a85bfc
SO		 162struct pn533_config_timing {
163 u8 rfu;
164 u8 atr_res_timeout;
165 u8 dep_timeout;
166} __packed;
167
c46ee386
AAJ		 168/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
169
170/* felica commands opcode */
171#define PN533_FELICA_OPC_SENSF_REQ 0
172#define PN533_FELICA_OPC_SENSF_RES 1
173/* felica SENSF_REQ parameters */
174#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
175#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
176#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
177#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
178
179/* type B initiator_data values */
180#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
181#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
182#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
183
184union pn533_cmd_poll_initdata {
185 struct {
186 u8 afi;
187 u8 polling_method;
188 } __packed type_b;
189 struct {
190 u8 opcode;
191 __be16 sc;
192 u8 rc;
193 u8 tsn;
194 } __packed felica;
195};
196
197/* Poll modulations */
198enum {
199 PN533_POLL_MOD_106KBPS_A,
200 PN533_POLL_MOD_212KBPS_FELICA,
201 PN533_POLL_MOD_424KBPS_FELICA,
202 PN533_POLL_MOD_106KBPS_JEWEL,
203 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 204 PN533_LISTEN_MOD,
c46ee386
AAJ		 205
206 __PN533_POLL_MOD_AFTER_LAST,
207};
208#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
209
210struct pn533_poll_modulations {
211 struct {
212 u8 maxtg;
213 u8 brty;
214 union pn533_cmd_poll_initdata initiator_data;
215 } __packed data;
216 u8 len;
217};
218
ef3d56e1 219static const struct pn533_poll_modulations poll_mod[] = {
c46ee386
AAJ		 220 [PN533_POLL_MOD_106KBPS_A] = {
221 .data = {
222 .maxtg = 1,
223 .brty = 0,
224 },
225 .len = 2,
226 },
227 [PN533_POLL_MOD_212KBPS_FELICA] = {
228 .data = {
229 .maxtg = 1,
230 .brty = 1,
231 .initiator_data.felica = {
232 .opcode = PN533_FELICA_OPC_SENSF_REQ,
233 .sc = PN533_FELICA_SENSF_SC_ALL,
234 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
235 .tsn = 0,
236 },
237 },
238 .len = 7,
239 },
240 [PN533_POLL_MOD_424KBPS_FELICA] = {
241 .data = {
242 .maxtg = 1,
243 .brty = 2,
244 .initiator_data.felica = {
245 .opcode = PN533_FELICA_OPC_SENSF_REQ,
246 .sc = PN533_FELICA_SENSF_SC_ALL,
247 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
248 .tsn = 0,
249 },
250 },
251 .len = 7,
252 },
253 [PN533_POLL_MOD_106KBPS_JEWEL] = {
254 .data = {
255 .maxtg = 1,
256 .brty = 4,
257 },
258 .len = 2,
259 },
260 [PN533_POLL_MOD_847KBPS_B] = {
261 .data = {
262 .maxtg = 1,
263 .brty = 8,
264 .initiator_data.type_b = {
265 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
266 .polling_method =
267 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
268 },
269 },
270 .len = 3,
271 },
6fbbdc16
SO		 272 [PN533_LISTEN_MOD] = {
273 .len = 0,
274 },
c46ee386
AAJ		 275};
276
277/* PN533_CMD_IN_ATR */
278
c46ee386
AAJ		 279struct pn533_cmd_activate_response {
280 u8 status;
281 u8 nfcid3t[10];
282 u8 didt;
283 u8 bst;
284 u8 brt;
285 u8 to;
286 u8 ppt;
287 /* optional */
288 u8 gt[];
289} __packed;
290
361f3cb7
SO		 291struct pn533_cmd_jump_dep_response {
292 u8 status;
293 u8 tg;
294 u8 nfcid3t[10];
295 u8 didt;
296 u8 bst;
297 u8 brt;
298 u8 to;
299 u8 ppt;
300 /* optional */
301 u8 gt[];
302} __packed;
c46ee386 303
ad3823ce
SO		 304
305/* PN533_TG_INIT_AS_TARGET */
306#define PN533_INIT_TARGET_PASSIVE 0x1
307#define PN533_INIT_TARGET_DEP 0x2
308
fc40a8c1
SO		 309#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
310#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
311#define PN533_INIT_TARGET_RESP_DEP 0x4
312
c46ee386
AAJ		 313struct pn533 {
314 struct usb_device *udev;
315 struct usb_interface *interface;
316 struct nfc_dev *nfc_dev;
317
318 struct urb *out_urb;
c46ee386 319 struct urb *in_urb;
c46ee386 320
6ff73fd2
SO		 321 struct sk_buff_head resp_q;
322
4849f85e
SO		 323 struct workqueue_struct *wq;
324 struct work_struct cmd_work;
5d50b364 325 struct work_struct cmd_complete_work;
6fbbdc16 326 struct work_struct poll_work;
6ff73fd2 327 struct work_struct mi_work;
103b34cf 328 struct work_struct tg_work;
6fbbdc16 329 struct timer_list listen_timer;
4849f85e 330 int wq_in_error;
6fbbdc16 331 int cancel_listen;
c46ee386
AAJ		 332
333 pn533_cmd_complete_t cmd_complete;
334 void *cmd_complete_arg;
b1e666f5 335 void *cmd_complete_mi_arg;
0201ed03 336 struct mutex cmd_lock;
c46ee386
AAJ		 337 u8 cmd;
338
339 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
340 u8 poll_mod_count;
341 u8 poll_mod_curr;
342 u32 poll_protocols;
6fbbdc16
SO		 343 u32 listen_protocols;
344
345 u8 *gb;
346 size_t gb_len;
c46ee386
AAJ		 347
348 u8 tgt_available_prots;
349 u8 tgt_active_prot;
51ad304c 350 u8 tgt_mode;
5c7b0531
SO		 351
352 u32 device_type;
5d50b364
SO		 353
354 struct list_head cmd_queue;
355 u8 cmd_pending;
9e2d493e
WR		 356
357 struct pn533_frame_ops *ops;
5d50b364
SO		 358};
359
360struct pn533_cmd {
361 struct list_head queue;
aada17ac
WR		 362 u8 cmd_code;
363 struct sk_buff *req;
364 struct sk_buff *resp;
9e2d493e 365 int resp_len;
5d50b364 366 void *arg;
c46ee386
AAJ		 367};
368
63123108 369struct pn533_std_frame {
c46ee386
AAJ		 370 u8 preamble;
371 __be16 start_frame;
372 u8 datalen;
373 u8 datalen_checksum;
374 u8 data[];
375} __packed;
376
9e2d493e
WR		 377struct pn533_frame_ops {
378 void (*tx_frame_init)(void *frame, u8 cmd_code);
379 void (*tx_frame_finish)(void *frame);
380 void (*tx_update_payload_len)(void *frame, int len);
381 int tx_header_len;
382 int tx_tail_len;
383
384 bool (*rx_is_frame_valid)(void *frame);
385 int (*rx_frame_size)(void *frame);
386 int rx_header_len;
387 int rx_tail_len;
388
389 int max_payload_len;
390 u8 (*get_cmd_code)(void *frame);
391};
392
c46ee386 393/* The rule: value + checksum = 0 */
63123108 394static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 395{
396 return ~value + 1;
397}
398
399/* The rule: sum(data elements) + checksum = 0 */
63123108 400static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 401{
402 u8 sum = 0;
403 int i;
404
405 for (i = 0; i < datalen; i++)
406 sum += data[i];
407
63123108 408 return pn533_std_checksum(sum);
c46ee386
AAJ		 409}
410
63123108 411static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 412{
63123108 413 struct pn533_std_frame *frame = _frame;
9e2d493e 414
c46ee386 415 frame->preamble = 0;
63123108
WR		 416 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
417 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
418 PN533_STD_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 419 frame->datalen = 2;
420}
421
63123108 422static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 423{
63123108 424 struct pn533_std_frame *frame = _frame;
9e2d493e 425
63123108 426 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 427
63123108
WR		 428 PN533_STD_FRAME_CHECKSUM(frame) =
429 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 430
63123108 431 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 432}
433
63123108 434static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 435{
63123108 436 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 437
438 frame->datalen += len;
439}
440
63123108 441static bool pn533_std_rx_frame_is_valid(void *_frame)
c46ee386
AAJ		 442{
443 u8 checksum;
63123108 444 struct pn533_std_frame *frame = _frame;
c46ee386 445
63123108 446 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 447 return false;
448
63123108 449 checksum = pn533_std_checksum(frame->datalen);
c46ee386
AAJ		 450 if (checksum != frame->datalen_checksum)
451 return false;
452
63123108
WR		 453 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
454 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
c46ee386
AAJ		 455 return false;
456
457 return true;
458}
459
63123108 460static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 461{
63123108 462 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 463 return false;
464
465 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
466 return false;
467
468 return true;
469}
470
63123108 471static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 472{
63123108 473 struct pn533_std_frame *f = frame;
9e2d493e 474
63123108
WR		 475 return sizeof(struct pn533_std_frame) + f->datalen +
476 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 477}
478
63123108 479static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 480{
63123108 481 struct pn533_std_frame *f = frame;
9e2d493e 482
63123108 483 return PN533_STD_FRAME_CMD(f);
9e2d493e
WR		 484}
485
ef3d56e1 486static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 487 .tx_frame_init = pn533_std_tx_frame_init,
488 .tx_frame_finish = pn533_std_tx_frame_finish,
489 .tx_update_payload_len = pn533_std_tx_update_payload_len,
490 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
491 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
492
493 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
494 .rx_frame_size = pn533_std_rx_frame_size,
495 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
496 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
497
498 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
499 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 500};
501
502static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 503{
9e2d493e 504 return (dev->ops->get_cmd_code(frame) == PN533_CMD_RESPONSE(dev->cmd));
c46ee386
AAJ		 505}
506
4849f85e
SO		 507
508static void pn533_wq_cmd_complete(struct work_struct *work)
c46ee386 509{
5d50b364 510 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
c46ee386
AAJ		 511 int rc;
512
0c33d262 513 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, dev->wq_in_error);
c46ee386 514 if (rc != -EINPROGRESS)
5d50b364 515 queue_work(dev->wq, &dev->cmd_work);
c46ee386
AAJ		 516}
517
518static void pn533_recv_response(struct urb *urb)
519{
520 struct pn533 *dev = urb->context;
9e2d493e 521 u8 *in_frame;
c46ee386 522
c46ee386
AAJ		 523 switch (urb->status) {
524 case 0:
f8f99171 525 break; /* success */
c46ee386
AAJ		 526 case -ECONNRESET:
527 case -ENOENT:
6ca55372 528 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 529 "The urb has been canceled (status %d)",
530 urb->status);
4849f85e
SO		 531 dev->wq_in_error = urb->status;
532 goto sched_wq;
f8f99171 533 case -ESHUTDOWN:
c46ee386 534 default:
6ca55372 535 nfc_dev_err(&dev->interface->dev,
f8f99171 536 "Urb failure (status %d)", urb->status);
4849f85e
SO		 537 dev->wq_in_error = urb->status;
538 goto sched_wq;
c46ee386
AAJ		 539 }
540
541 in_frame = dev->in_urb->transfer_buffer;
542
fcfafc76 543 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
e279f84f
SO		 544 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
545 dev->ops->rx_frame_size(in_frame), false);
99e591be 546
9e2d493e 547 if (!dev->ops->rx_is_frame_valid(in_frame)) {
c46ee386 548 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
4849f85e
SO		 549 dev->wq_in_error = -EIO;
550 goto sched_wq;
c46ee386
AAJ		 551 }
552
9e2d493e 553 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 554 nfc_dev_err(&dev->interface->dev,
555 "It it not the response to the last command");
4849f85e
SO		 556 dev->wq_in_error = -EIO;
557 goto sched_wq;
c46ee386
AAJ		 558 }
559
4849f85e 560 dev->wq_in_error = 0;
c46ee386 561
4849f85e 562sched_wq:
5d50b364 563 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 564}
565
566static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
567{
568 dev->in_urb->complete = pn533_recv_response;
569
570 return usb_submit_urb(dev->in_urb, flags);
571}
572
573static void pn533_recv_ack(struct urb *urb)
574{
575 struct pn533 *dev = urb->context;
63123108 576 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 577 int rc;
578
579 switch (urb->status) {
580 case 0:
f8f99171 581 break; /* success */
c46ee386
AAJ		 582 case -ECONNRESET:
583 case -ENOENT:
6ca55372 584 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 585 "The urb has been stopped (status %d)",
586 urb->status);
4849f85e
SO		 587 dev->wq_in_error = urb->status;
588 goto sched_wq;
f8f99171 589 case -ESHUTDOWN:
c46ee386 590 default:
6ca55372 591 nfc_dev_err(&dev->interface->dev,
f8f99171 592 "Urb failure (status %d)", urb->status);
4849f85e
SO		 593 dev->wq_in_error = urb->status;
594 goto sched_wq;
c46ee386
AAJ		 595 }
596
597 in_frame = dev->in_urb->transfer_buffer;
598
63123108 599 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 600 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
4849f85e
SO		 601 dev->wq_in_error = -EIO;
602 goto sched_wq;
c46ee386
AAJ		 603 }
604
c46ee386
AAJ		 605 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
606 if (rc) {
6ca55372
WR		 607 nfc_dev_err(&dev->interface->dev,
608 "usb_submit_urb failed with result %d", rc);
4849f85e
SO		 609 dev->wq_in_error = rc;
610 goto sched_wq;
c46ee386
AAJ		 611 }
612
613 return;
614
4849f85e 615sched_wq:
5d50b364 616 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 617}
618
619static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
620{
621 dev->in_urb->complete = pn533_recv_ack;
622
623 return usb_submit_urb(dev->in_urb, flags);
624}
625
626static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
627{
63123108 628 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 629 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 630 int rc;
631
632 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
633
5b5a4437
WR		 634 dev->out_urb->transfer_buffer = ack;
635 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 636 rc = usb_submit_urb(dev->out_urb, flags);
637
638 return rc;
639}
640
e8f40531
WR		 641static int __pn533_send_frame_async(struct pn533 *dev,
642 struct sk_buff *out,
643 struct sk_buff *in,
644 int in_len,
c46ee386 645 pn533_cmd_complete_t cmd_complete,
d94ea4f5 646 void *arg)
c46ee386
AAJ		 647{
648 int rc;
649
9e2d493e 650 dev->cmd = dev->ops->get_cmd_code(out->data);
c46ee386
AAJ		 651 dev->cmd_complete = cmd_complete;
652 dev->cmd_complete_arg = arg;
653
e8f40531
WR		 654 dev->out_urb->transfer_buffer = out->data;
655 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 656
e8f40531
WR		 657 dev->in_urb->transfer_buffer = in->data;
658 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 659
e279f84f
SO		 660 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
661 out->data, out->len, false);
99e591be 662
d94ea4f5 663 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 664 if (rc)
665 return rc;
666
d94ea4f5 667 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
c46ee386
AAJ		 668 if (rc)
669 goto error;
670
671 return 0;
672
673error:
674 usb_unlink_urb(dev->out_urb);
675 return rc;
676}
677
9e2d493e
WR		 678static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
679 struct sk_buff *skb)
aada17ac 680{
aada17ac
WR		 681 /* payload is already there, just update datalen */
682 int payload_len = skb->len;
9e2d493e 683 struct pn533_frame_ops *ops = dev->ops;
aada17ac 684
aada17ac 685
9e2d493e
WR		 686 skb_push(skb, ops->tx_header_len);
687 skb_put(skb, ops->tx_tail_len);
aada17ac 688
9e2d493e
WR		 689 ops->tx_frame_init(skb->data, cmd_code);
690 ops->tx_update_payload_len(skb->data, payload_len);
691 ops->tx_frame_finish(skb->data);
aada17ac
WR		 692}
693
694struct pn533_send_async_complete_arg {
695 pn533_send_async_complete_t complete_cb;
696 void *complete_cb_context;
697 struct sk_buff *resp;
698 struct sk_buff *req;
699};
700
0c33d262 701static int pn533_send_async_complete(struct pn533 *dev, void *_arg, int status)
aada17ac
WR		 702{
703 struct pn533_send_async_complete_arg *arg = _arg;
704
705 struct sk_buff *req = arg->req;
706 struct sk_buff *resp = arg->resp;
707
aada17ac
WR		 708 int rc;
709
710 dev_kfree_skb(req);
711
0c33d262 712 if (status < 0) {
aada17ac 713 arg->complete_cb(dev, arg->complete_cb_context,
0c33d262 714 ERR_PTR(status));
aada17ac 715 dev_kfree_skb(resp);
0c33d262
WR		 716 kfree(arg);
717 return status;
aada17ac
WR		 718 }
719
9e2d493e
WR		 720 skb_put(resp, dev->ops->rx_frame_size(resp->data));
721 skb_pull(resp, dev->ops->rx_header_len);
722 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac
WR		 723
724 rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
725
aada17ac
WR		 726 kfree(arg);
727 return rc;
728}
729
730static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
731 struct sk_buff *req, struct sk_buff *resp,
732 int resp_len,
733 pn533_send_async_complete_t complete_cb,
734 void *complete_cb_context)
735{
736 struct pn533_cmd *cmd;
737 struct pn533_send_async_complete_arg *arg;
738 int rc = 0;
739
fcfafc76 740 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 741
858ce022 742 arg = kzalloc(sizeof(*arg), GFP_KERNEL);
aada17ac
WR		 743 if (!arg)
744 return -ENOMEM;
745
746 arg->complete_cb = complete_cb;
747 arg->complete_cb_context = complete_cb_context;
748 arg->resp = resp;
749 arg->req = req;
750
9e2d493e 751 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 752
753 mutex_lock(&dev->cmd_lock);
754
755 if (!dev->cmd_pending) {
e8f40531
WR		 756 rc = __pn533_send_frame_async(dev, req, resp, resp_len,
757 pn533_send_async_complete, arg);
aada17ac
WR		 758 if (rc)
759 goto error;
760
761 dev->cmd_pending = 1;
762 goto unlock;
763 }
764
fcfafc76
WR		 765 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
766 cmd_code);
aada17ac
WR		 767
768 cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
769 if (!cmd) {
770 rc = -ENOMEM;
771 goto error;
772 }
773
774 INIT_LIST_HEAD(&cmd->queue);
775 cmd->cmd_code = cmd_code;
776 cmd->req = req;
777 cmd->resp = resp;
9e2d493e 778 cmd->resp_len = resp_len;
aada17ac
WR		 779 cmd->arg = arg;
780
781 list_add_tail(&cmd->queue, &dev->cmd_queue);
782
783 goto unlock;
784
785error:
786 kfree(arg);
787unlock:
788 mutex_unlock(&dev->cmd_lock);
789 return rc;
15461aeb
WR		 790}
791
792static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
793 struct sk_buff *req,
794 pn533_send_async_complete_t complete_cb,
795 void *complete_cb_context)
796{
797 struct sk_buff *resp;
798 int rc;
9e2d493e
WR		 799 int resp_len = dev->ops->rx_header_len +
800 dev->ops->max_payload_len +
801 dev->ops->rx_tail_len;
15461aeb 802
15461aeb
WR		 803 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
804 if (!resp)
805 return -ENOMEM;
806
807 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
808 complete_cb_context);
809 if (rc)
810 dev_kfree_skb(resp);
811
812 return rc;
aada17ac
WR		 813}
814
815static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
816 struct sk_buff *req,
817 pn533_send_async_complete_t complete_cb,
818 void *complete_cb_context)
819{
820 struct sk_buff *resp;
821 int rc;
9e2d493e
WR		 822 int resp_len = dev->ops->rx_header_len +
823 dev->ops->max_payload_len +
824 dev->ops->rx_tail_len;
aada17ac 825
9e2d493e 826 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 827 if (!resp)
828 return -ENOMEM;
829
9e2d493e
WR		 830 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
831 complete_cb_context);
aada17ac
WR		 832 if (rc)
833 dev_kfree_skb(resp);
834
835 return rc;
836}
837
b1e666f5
WR		 838/*
839 * pn533_send_cmd_direct_async
840 *
841 * The function sends a piority cmd directly to the chip omiting the cmd
842 * queue. It's intended to be used by chaining mechanism of received responses
843 * where the host has to request every single chunk of data before scheduling
844 * next cmd from the queue.
845 */
846static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
847 struct sk_buff *req,
848 pn533_send_async_complete_t complete_cb,
849 void *complete_cb_context)
850{
851 struct pn533_send_async_complete_arg *arg;
852 struct sk_buff *resp;
853 int rc;
9e2d493e
WR		 854 int resp_len = dev->ops->rx_header_len +
855 dev->ops->max_payload_len +
856 dev->ops->rx_tail_len;
b1e666f5 857
b1e666f5
WR		 858 resp = alloc_skb(resp_len, GFP_KERNEL);
859 if (!resp)
860 return -ENOMEM;
861
858ce022 862 arg = kzalloc(sizeof(*arg), GFP_KERNEL);
b1e666f5
WR		 863 if (!arg) {
864 dev_kfree_skb(resp);
865 return -ENOMEM;
866 }
867
868 arg->complete_cb = complete_cb;
869 arg->complete_cb_context = complete_cb_context;
870 arg->resp = resp;
871 arg->req = req;
872
9e2d493e 873 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 874
e8f40531
WR		 875 rc = __pn533_send_frame_async(dev, req, resp, resp_len,
876 pn533_send_async_complete, arg);
b1e666f5
WR		 877 if (rc < 0) {
878 dev_kfree_skb(resp);
879 kfree(arg);
880 }
881
882 return rc;
883}
884
5d50b364
SO		 885static void pn533_wq_cmd(struct work_struct *work)
886{
887 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
888 struct pn533_cmd *cmd;
889
890 mutex_lock(&dev->cmd_lock);
891
892 if (list_empty(&dev->cmd_queue)) {
893 dev->cmd_pending = 0;
894 mutex_unlock(&dev->cmd_lock);
895 return;
896 }
897
898 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
899
60ad07ab
SJ		 900 list_del(&cmd->queue);
901
5d50b364
SO		 902 mutex_unlock(&dev->cmd_lock);
903
9e2d493e
WR		 904 __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len,
905 pn533_send_async_complete, cmd->arg);
5d50b364 906
5d50b364
SO		 907 kfree(cmd);
908}
909
c46ee386 910struct pn533_sync_cmd_response {
94c5c156 911 struct sk_buff *resp;
c46ee386
AAJ		 912 struct completion done;
913};
914
94c5c156
WR		 915static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
916 struct sk_buff *resp)
917{
918 struct pn533_sync_cmd_response *arg = _arg;
919
94c5c156
WR		 920 arg->resp = resp;
921 complete(&arg->done);
922
923 return 0;
924}
925
926/* pn533_send_cmd_sync
927 *
928 * Please note the req parameter is freed inside the function to
929 * limit a number of return value interpretations by the caller.
930 *
931 * 1. negative in case of error during TX path -> req should be freed
932 *
933 * 2. negative in case of error during RX path -> req should not be freed
934 * as it's been already freed at the begining of RX path by
935 * async_complete_cb.
936 *
937 * 3. valid pointer in case of succesfult RX path
938 *
939 * A caller has to check a return value with IS_ERR macro. If the test pass,
940 * the returned pointer is valid.
941 *
942 * */
943static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
944 struct sk_buff *req)
945{
946 int rc;
947 struct pn533_sync_cmd_response arg;
948
94c5c156
WR		 949 init_completion(&arg.done);
950
951 rc = pn533_send_cmd_async(dev, cmd_code, req,
952 pn533_send_sync_complete, &arg);
953 if (rc) {
954 dev_kfree_skb(req);
955 return ERR_PTR(rc);
956 }
957
958 wait_for_completion(&arg.done);
959
960 return arg.resp;
961}
962
c46ee386
AAJ		 963static void pn533_send_complete(struct urb *urb)
964{
965 struct pn533 *dev = urb->context;
966
c46ee386
AAJ		 967 switch (urb->status) {
968 case 0:
f8f99171 969 break; /* success */
c46ee386
AAJ		 970 case -ECONNRESET:
971 case -ENOENT:
6ca55372 972 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 973 "The urb has been stopped (status %d)",
974 urb->status);
c46ee386 975 break;
f8f99171 976 case -ESHUTDOWN:
c46ee386 977 default:
f8f99171
WR		 978 nfc_dev_err(&dev->interface->dev,
979 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 980 }
981}
982
9e2d493e 983static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 984{
985 struct sk_buff *skb;
986
9e2d493e 987 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 988 size +
9e2d493e 989 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 990
991 if (skb)
9e2d493e 992 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 993
994 return skb;
995}
996
c46ee386
AAJ		 997struct pn533_target_type_a {
998 __be16 sens_res;
999 u8 sel_res;
1000 u8 nfcid_len;
1001 u8 nfcid_data[];
1002} __packed;
1003
1004
1005#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1006#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1007#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1008
1009#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1010#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1011
1012#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1013#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1014
1015#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1016#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1017#define PN533_TYPE_A_SEL_PROT_DEP 2
1018#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1019
1020static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1021 int target_data_len)
1022{
1023 u8 ssd;
1024 u8 platconf;
1025
1026 if (target_data_len < sizeof(struct pn533_target_type_a))
1027 return false;
1028
1029 /* The lenght check of nfcid[] and ats[] are not being performed because
1030 the values are not being used */
1031
1032 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1033 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1034 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1035
1036 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1037 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1038 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1039 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1040 return false;
1041
1042 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1043 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1044 return false;
1045
1046 return true;
1047}
1048
1049static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1050 int tgt_data_len)
1051{
1052 struct pn533_target_type_a *tgt_type_a;
1053
37cf4fc6 1054 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1055
1056 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1057 return -EPROTO;
1058
1059 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1060 case PN533_TYPE_A_SEL_PROT_MIFARE:
1061 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1062 break;
1063 case PN533_TYPE_A_SEL_PROT_ISO14443:
1064 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1065 break;
1066 case PN533_TYPE_A_SEL_PROT_DEP:
1067 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1068 break;
1069 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1070 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1071 NFC_PROTO_NFC_DEP_MASK;
1072 break;
1073 }
1074
1075 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1076 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1077 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1078 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1079
1080 return 0;
1081}
1082
1083struct pn533_target_felica {
1084 u8 pol_res;
1085 u8 opcode;
1086 u8 nfcid2[8];
1087 u8 pad[8];
1088 /* optional */
1089 u8 syst_code[];
1090} __packed;
1091
1092#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1093#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1094
1095static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1096 int target_data_len)
1097{
1098 if (target_data_len < sizeof(struct pn533_target_felica))
1099 return false;
1100
1101 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1102 return false;
1103
1104 return true;
1105}
1106
1107static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1108 int tgt_data_len)
1109{
1110 struct pn533_target_felica *tgt_felica;
1111
37cf4fc6 1112 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1113
1114 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1115 return -EPROTO;
1116
5d467742
WR		 1117 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1118 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1119 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1120 else
1121 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1122
7975754f
SO		 1123 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1124 nfc_tgt->sensf_res_len = 9;
1125
c46ee386
AAJ		 1126 return 0;
1127}
1128
1129struct pn533_target_jewel {
1130 __be16 sens_res;
1131 u8 jewelid[4];
1132} __packed;
1133
1134static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1135 int target_data_len)
1136{
1137 u8 ssd;
1138 u8 platconf;
1139
1140 if (target_data_len < sizeof(struct pn533_target_jewel))
1141 return false;
1142
1143 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1144 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1145 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1146
1147 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1148 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1149 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1150 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1151 return false;
1152
1153 return true;
1154}
1155
1156static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1157 int tgt_data_len)
1158{
1159 struct pn533_target_jewel *tgt_jewel;
1160
37cf4fc6 1161 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1162
1163 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1164 return -EPROTO;
1165
1166 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1167 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1168 nfc_tgt->nfcid1_len = 4;
1169 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1170
1171 return 0;
1172}
1173
1174struct pn533_type_b_prot_info {
1175 u8 bitrate;
1176 u8 fsci_type;
1177 u8 fwi_adc_fo;
1178} __packed;
1179
1180#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1181#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1182#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1183
1184struct pn533_type_b_sens_res {
1185 u8 opcode;
1186 u8 nfcid[4];
1187 u8 appdata[4];
1188 struct pn533_type_b_prot_info prot_info;
1189} __packed;
1190
1191#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1192
1193struct pn533_target_type_b {
1194 struct pn533_type_b_sens_res sensb_res;
1195 u8 attrib_res_len;
1196 u8 attrib_res[];
1197} __packed;
1198
1199static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1200 int target_data_len)
1201{
1202 if (target_data_len < sizeof(struct pn533_target_type_b))
1203 return false;
1204
1205 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1206 return false;
1207
1208 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1209 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1210 return false;
1211
1212 return true;
1213}
1214
1215static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1216 int tgt_data_len)
1217{
1218 struct pn533_target_type_b *tgt_type_b;
1219
37cf4fc6 1220 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1221
1222 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1223 return -EPROTO;
1224
01d719a2 1225 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1226
1227 return 0;
1228}
1229
b5193e5d
WR		 1230static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1231 int tgdata_len)
c46ee386 1232{
c46ee386
AAJ		 1233 struct nfc_target nfc_tgt;
1234 int rc;
1235
1236 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1237 dev->poll_mod_curr);
c46ee386 1238
b5193e5d 1239 if (tg != 1)
c46ee386
AAJ		 1240 return -EPROTO;
1241
98b3ac1b
SO		 1242 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1243
c46ee386
AAJ		 1244 switch (dev->poll_mod_curr) {
1245 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1246 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1247 break;
1248 case PN533_POLL_MOD_212KBPS_FELICA:
1249 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1250 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1251 break;
1252 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1253 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1254 break;
1255 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1256 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1257 break;
1258 default:
b5193e5d
WR		 1259 nfc_dev_err(&dev->interface->dev,
1260 "Unknown current poll modulation");
c46ee386
AAJ		 1261 return -EPROTO;
1262 }
1263
1264 if (rc)
1265 return rc;
1266
1267 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1268 nfc_dev_dbg(&dev->interface->dev,
1269 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1270 return -EAGAIN;
1271 }
1272
b5193e5d
WR		 1273 nfc_dev_dbg(&dev->interface->dev,
1274 "Target found - supported protocols: 0x%x",
1275 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1276
1277 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1278
1279 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1280
1281 return 0;
1282}
1283
6fbbdc16
SO		 1284static inline void pn533_poll_next_mod(struct pn533 *dev)
1285{
1286 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1287}
1288
c46ee386
AAJ		 1289static void pn533_poll_reset_mod_list(struct pn533 *dev)
1290{
1291 dev->poll_mod_count = 0;
1292}
1293
1294static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1295{
1296 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1297 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1298 dev->poll_mod_count++;
1299}
1300
6fbbdc16
SO		 1301static void pn533_poll_create_mod_list(struct pn533 *dev,
1302 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1303{
1304 pn533_poll_reset_mod_list(dev);
1305
b08e8603
WR		 1306 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1307 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1308 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1309 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1310
b08e8603
WR		 1311 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1312 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1313 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1314 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1315 }
1316
6fbbdc16 1317 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1318 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1319
01d719a2 1320 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1321 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1322
6fbbdc16
SO		 1323 if (tm_protocols)
1324 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1325}
1326
b5193e5d 1327static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1328{
b5193e5d
WR		 1329 u8 nbtg, tg, *tgdata;
1330 int rc, tgdata_len;
c46ee386
AAJ		 1331
1332 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1333
b5193e5d
WR		 1334 nbtg = resp->data[0];
1335 tg = resp->data[1];
1336 tgdata = &resp->data[2];
1337 tgdata_len = resp->len - 2; /* nbtg + tg */
1338
1339 if (nbtg) {
1340 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1341
1342 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1343 if (rc == 0) {
1344 pn533_poll_reset_mod_list(dev);
1345 return 0;
1346 }
c46ee386
AAJ		 1347 }
1348
6fbbdc16 1349 return -EAGAIN;
c46ee386
AAJ		 1350}
1351
9e2d493e 1352static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1353{
b5193e5d
WR		 1354 struct sk_buff *skb;
1355 u8 *felica, *nfcid3, *gb;
1356
9e2d493e
WR		 1357 u8 *gbytes = dev->gb;
1358 size_t gbytes_len = dev->gb_len;
1359
51d9e803
SO		 1360 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1361 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1362 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1363 0xff, 0xff}; /* System code */
b5193e5d 1364
51d9e803
SO		 1365 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1366 0x0, 0x0, 0x0,
1367 0x40}; /* SEL_RES for DEP */
ad3823ce 1368
b5193e5d
WR		 1369 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1370 felica (18), nfcid3 (10), gb_len (1) */
1371 gbytes_len +
1372 1; /* len Tk*/
ad3823ce 1373
9e2d493e 1374 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1375 if (!skb)
1376 return NULL;
ad3823ce
SO		 1377
1378 /* DEP support only */
52f2eaee 1379 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1380
1381 /* MIFARE params */
1382 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1383
1384 /* Felica params */
b5193e5d
WR		 1385 felica = skb_put(skb, 18);
1386 memcpy(felica, felica_params, 18);
1387 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1388
1389 /* NFCID3 */
b5193e5d
WR		 1390 nfcid3 = skb_put(skb, 10);
1391 memset(nfcid3, 0, 10);
1392 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1393
1394 /* General bytes */
b5193e5d 1395 *skb_put(skb, 1) = gbytes_len;
51d9e803 1396
b5193e5d
WR		 1397 gb = skb_put(skb, gbytes_len);
1398 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1399
b5193e5d
WR		 1400 /* Len Tk */
1401 *skb_put(skb, 1) = 0;
51d9e803 1402
b5193e5d 1403 return skb;
ad3823ce
SO		 1404}
1405
b1bb290a 1406#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1407#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1408static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1409 struct sk_buff *resp)
103b34cf 1410{
e4878823 1411 u8 status;
103b34cf
SO		 1412
1413 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1414
e4878823
WR		 1415 if (IS_ERR(resp))
1416 return PTR_ERR(resp);
103b34cf 1417
e4878823
WR		 1418 status = resp->data[0];
1419 skb_pull(resp, sizeof(status));
103b34cf 1420
e4878823 1421 if (status != 0) {
103b34cf 1422 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1423 dev->tgt_mode = 0;
e4878823 1424 dev_kfree_skb(resp);
103b34cf
SO		 1425 return 0;
1426 }
1427
e4878823 1428 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1429}
1430
1431static void pn533_wq_tg_get_data(struct work_struct *work)
1432{
1433 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1434
e4878823
WR		 1435 struct sk_buff *skb;
1436 int rc;
103b34cf 1437
e4878823 1438 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1439
9e2d493e 1440 skb = pn533_alloc_skb(dev, 0);
e4878823 1441 if (!skb)
103b34cf
SO		 1442 return;
1443
e4878823
WR		 1444 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1445 pn533_tm_get_data_complete, NULL);
103b34cf 1446
e4878823
WR		 1447 if (rc < 0)
1448 dev_kfree_skb(skb);
103b34cf
SO		 1449
1450 return;
1451}
1452
fc40a8c1 1453#define ATR_REQ_GB_OFFSET 17
b5193e5d 1454static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1455{
b5193e5d 1456 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1457 size_t gb_len;
103b34cf 1458 int rc;
ad3823ce
SO		 1459
1460 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1461
b5193e5d 1462 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1463 return -EINVAL;
1464
b5193e5d
WR		 1465 mode = resp->data[0];
1466 cmd = &resp->data[1];
ad3823ce 1467
b5193e5d
WR		 1468 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1469 mode, resp->len);
ad3823ce 1470
b5193e5d
WR		 1471 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1472 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1473 comm_mode = NFC_COMM_ACTIVE;
1474
b5193e5d 1475 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1476 return -EOPNOTSUPP;
1477
b5193e5d
WR		 1478 gb = cmd + ATR_REQ_GB_OFFSET;
1479 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1480
103b34cf
SO		 1481 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1482 comm_mode, gb, gb_len);
1483 if (rc < 0) {
1484 nfc_dev_err(&dev->interface->dev,
1485 "Error when signaling target activation");
1486 return rc;
1487 }
1488
51ad304c 1489 dev->tgt_mode = 1;
103b34cf
SO		 1490 queue_work(dev->wq, &dev->tg_work);
1491
1492 return 0;
fe7c5800
SO		 1493}
1494
6fbbdc16 1495static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1496{
37cf4fc6 1497 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1498
1499 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1500
1501 /* An ack will cancel the last issued command (poll) */
1502 pn533_send_ack(dev, GFP_ATOMIC);
1503
1504 dev->cancel_listen = 1;
1505
6fbbdc16
SO		 1506 pn533_poll_next_mod(dev);
1507
1508 queue_work(dev->wq, &dev->poll_work);
1509}
1510
1511static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1512 struct sk_buff *resp)
6fbbdc16
SO		 1513{
1514 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1515 int rc;
1516
6fbbdc16 1517 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1518
b5193e5d
WR		 1519 if (IS_ERR(resp)) {
1520 rc = PTR_ERR(resp);
1521
1522 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1523 __func__, rc);
1524
1525 if (rc == -ENOENT) {
1526 if (dev->poll_mod_count != 0)
1527 return rc;
1528 else
1529 goto stop_poll;
1530 } else if (rc < 0) {
1531 nfc_dev_err(&dev->interface->dev,
1532 "Error %d when running poll", rc);
1533 goto stop_poll;
1534 }
6fbbdc16 1535 }
ad3823ce 1536
6fbbdc16
SO		 1537 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1538
b5193e5d 1539 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1540 del_timer(&dev->listen_timer);
b5193e5d
WR		 1541 rc = pn533_init_target_complete(dev, resp);
1542 goto done;
6fbbdc16
SO		 1543 }
1544
b5193e5d
WR		 1545 /* Initiator mode */
1546 rc = pn533_start_poll_complete(dev, resp);
1547 if (!rc)
1548 goto done;
6fbbdc16 1549
95cb9e10
WR		 1550 if (!dev->poll_mod_count) {
1551 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1552 goto done;
1553 }
1554
b5193e5d 1555 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1556 queue_work(dev->wq, &dev->poll_work);
1557
b5193e5d
WR		 1558done:
1559 dev_kfree_skb(resp);
1560 return rc;
6fbbdc16
SO		 1561
1562stop_poll:
b5193e5d
WR		 1563 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1564
6fbbdc16
SO		 1565 pn533_poll_reset_mod_list(dev);
1566 dev->poll_protocols = 0;
b5193e5d 1567 return rc;
ad3823ce
SO		 1568}
1569
9e2d493e
WR		 1570static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1571 struct pn533_poll_modulations *mod)
c46ee386 1572{
b5193e5d 1573 struct sk_buff *skb;
c46ee386 1574
9e2d493e 1575 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1576 if (!skb)
1577 return NULL;
c46ee386 1578
b5193e5d 1579 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1580
b5193e5d 1581 return skb;
6fbbdc16 1582}
c46ee386 1583
6fbbdc16
SO		 1584static int pn533_send_poll_frame(struct pn533 *dev)
1585{
b5193e5d
WR		 1586 struct pn533_poll_modulations *mod;
1587 struct sk_buff *skb;
6fbbdc16 1588 int rc;
b5193e5d 1589 u8 cmd_code;
c46ee386 1590
b5193e5d 1591 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1592
b5193e5d
WR		 1593 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1594 __func__, mod->len);
c46ee386 1595
b5193e5d
WR		 1596 if (mod->len == 0) { /* Listen mode */
1597 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1598 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1599 } else { /* Polling mode */
1600 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1601 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1602 }
1603
1604 if (!skb) {
1605 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1606 return -ENOMEM;
1607 }
1608
1609 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1610 NULL);
1611 if (rc < 0) {
1612 dev_kfree_skb(skb);
6fbbdc16 1613 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1614 }
c46ee386 1615
6fbbdc16
SO		 1616 return rc;
1617}
1618
1619static void pn533_wq_poll(struct work_struct *work)
1620{
1621 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1622 struct pn533_poll_modulations *cur_mod;
1623 int rc;
1624
1625 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1626
1627 nfc_dev_dbg(&dev->interface->dev,
1628 "%s cancel_listen %d modulation len %d",
1629 __func__, dev->cancel_listen, cur_mod->len);
1630
1631 if (dev->cancel_listen == 1) {
1632 dev->cancel_listen = 0;
1633 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1634 }
1635
6fbbdc16
SO		 1636 rc = pn533_send_poll_frame(dev);
1637 if (rc)
1638 return;
c46ee386 1639
6fbbdc16
SO		 1640 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1641 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1642
6fbbdc16 1643 return;
c46ee386
AAJ		 1644}
1645
fe7c5800
SO		 1646static int pn533_start_poll(struct nfc_dev *nfc_dev,
1647 u32 im_protocols, u32 tm_protocols)
1648{
1649 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1650
1651 nfc_dev_dbg(&dev->interface->dev,
1652 "%s: im protocols 0x%x tm protocols 0x%x",
1653 __func__, im_protocols, tm_protocols);
1654
1655 if (dev->tgt_active_prot) {
1656 nfc_dev_err(&dev->interface->dev,
1657 "Cannot poll with a target already activated");
1658 return -EBUSY;
1659 }
1660
51ad304c
SO		 1661 if (dev->tgt_mode) {
1662 nfc_dev_err(&dev->interface->dev,
1663 "Cannot poll while already being activated");
1664 return -EBUSY;
1665 }
1666
6fbbdc16
SO		 1667 if (tm_protocols) {
1668 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1669 if (dev->gb == NULL)
1670 tm_protocols = 0;
1671 }
ad3823ce 1672
6fbbdc16
SO		 1673 dev->poll_mod_curr = 0;
1674 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1675 dev->poll_protocols = im_protocols;
1676 dev->listen_protocols = tm_protocols;
ad3823ce 1677
6fbbdc16 1678 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1679}
1680
c46ee386
AAJ		 1681static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1682{
1683 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1684
1685 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1686
6fbbdc16
SO		 1687 del_timer(&dev->listen_timer);
1688
c46ee386 1689 if (!dev->poll_mod_count) {
6ca55372
WR		 1690 nfc_dev_dbg(&dev->interface->dev,
1691 "Polling operation was not running");
c46ee386
AAJ		 1692 return;
1693 }
1694
1695 /* An ack will cancel the last issued command (poll) */
1696 pn533_send_ack(dev, GFP_KERNEL);
1697
1698 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1699 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1700
1701 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1702}
1703
1704static int pn533_activate_target_nfcdep(struct pn533 *dev)
1705{
cb950d93 1706 struct pn533_cmd_activate_response *rsp;
541d920b 1707 u16 gt_len;
c46ee386
AAJ		 1708 int rc;
1709
cb950d93
WR		 1710 struct sk_buff *skb;
1711 struct sk_buff *resp;
c46ee386 1712
cb950d93 1713 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1714
9e2d493e 1715 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1716 if (!skb)
1717 return -ENOMEM;
c46ee386 1718
cb950d93
WR		 1719 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1720 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1721
cb950d93
WR		 1722 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1723 if (IS_ERR(resp))
1724 return PTR_ERR(resp);
c46ee386 1725
37cf4fc6 1726 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1727 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1728 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1729 nfc_dev_err(&dev->interface->dev,
1730 "Target activation failed (error 0x%x)", rc);
cb950d93 1731 dev_kfree_skb(resp);
c46ee386 1732 return -EIO;
8a0ecfe7 1733 }
c46ee386 1734
541d920b 1735 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1736 gt_len = resp->len - 16;
1737 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1738
cb950d93 1739 dev_kfree_skb(resp);
541d920b 1740 return rc;
c46ee386
AAJ		 1741}
1742
90099433
EL		 1743static int pn533_activate_target(struct nfc_dev *nfc_dev,
1744 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1745{
1746 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1747 int rc;
1748
1749 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1750 protocol);
c46ee386
AAJ		 1751
1752 if (dev->poll_mod_count) {
6ca55372
WR		 1753 nfc_dev_err(&dev->interface->dev,
1754 "Cannot activate while polling");
c46ee386
AAJ		 1755 return -EBUSY;
1756 }
1757
1758 if (dev->tgt_active_prot) {
6ca55372
WR		 1759 nfc_dev_err(&dev->interface->dev,
1760 "There is already an active target");
c46ee386
AAJ		 1761 return -EBUSY;
1762 }
1763
1764 if (!dev->tgt_available_prots) {
6ca55372
WR		 1765 nfc_dev_err(&dev->interface->dev,
1766 "There is no available target to activate");
c46ee386
AAJ		 1767 return -EINVAL;
1768 }
1769
1770 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1771 nfc_dev_err(&dev->interface->dev,
1772 "Target doesn't support requested proto %u",
1773 protocol);
c46ee386
AAJ		 1774 return -EINVAL;
1775 }
1776
1777 if (protocol == NFC_PROTO_NFC_DEP) {
1778 rc = pn533_activate_target_nfcdep(dev);
1779 if (rc) {
6ca55372
WR		 1780 nfc_dev_err(&dev->interface->dev,
1781 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1782 return rc;
1783 }
1784 }
1785
1786 dev->tgt_active_prot = protocol;
1787 dev->tgt_available_prots = 0;
1788
1789 return 0;
1790}
1791
90099433
EL		 1792static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1793 struct nfc_target *target)
c46ee386
AAJ		 1794{
1795 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1796
1797 struct sk_buff *skb;
1798 struct sk_buff *resp;
1799
c46ee386
AAJ		 1800 int rc;
1801
1802 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1803
1804 if (!dev->tgt_active_prot) {
1805 nfc_dev_err(&dev->interface->dev, "There is no active target");
1806 return;
1807 }
1808
1809 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1810 skb_queue_purge(&dev->resp_q);
1811
9e2d493e 1812 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1813 if (!skb)
1814 return;
c46ee386 1815
cb950d93 1816 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1817
cb950d93
WR		 1818 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1819 if (IS_ERR(resp))
c46ee386 1820 return;
c46ee386 1821
cb950d93 1822 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1823 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1824 nfc_dev_err(&dev->interface->dev,
1825 "Error 0x%x when releasing the target", rc);
c46ee386 1826
cb950d93 1827 dev_kfree_skb(resp);
c46ee386
AAJ		 1828 return;
1829}
1830
361f3cb7
SO		 1831
1832static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1833 struct sk_buff *resp)
361f3cb7 1834{
13003649 1835 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1836 u8 target_gt_len;
1837 int rc;
13003649 1838 u8 active = *(u8 *)arg;
70418e6e
WR		 1839
1840 kfree(arg);
361f3cb7 1841
13003649
WR		 1842 if (IS_ERR(resp))
1843 return PTR_ERR(resp);
361f3cb7
SO		 1844
1845 if (dev->tgt_available_prots &&
1846 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1847 nfc_dev_err(&dev->interface->dev,
5d467742 1848 "The target does not support DEP");
13003649
WR		 1849 rc = -EINVAL;
1850 goto error;
361f3cb7
SO		 1851 }
1852
13003649
WR		 1853 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1854
1855 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1856 if (rc != PN533_CMD_RET_SUCCESS) {
1857 nfc_dev_err(&dev->interface->dev,
a45e1c8d 1858 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 1859 goto error;
361f3cb7
SO		 1860 }
1861
1862 if (!dev->tgt_available_prots) {
13003649
WR		 1863 struct nfc_target nfc_target;
1864
361f3cb7
SO		 1865 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1866
1867 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1868 nfc_target.nfcid1_len = 10;
13003649 1869 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1870 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1871 if (rc)
13003649 1872 goto error;
361f3cb7
SO		 1873
1874 dev->tgt_available_prots = 0;
1875 }
1876
1877 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1878
1879 /* ATR_RES general bytes are located at offset 17 */
13003649 1880 target_gt_len = resp->len - 17;
361f3cb7 1881 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1882 rsp->gt, target_gt_len);
361f3cb7
SO		 1883 if (rc == 0)
1884 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1885 dev->nfc_dev->targets[0].idx,
1886 !active, NFC_RF_INITIATOR);
361f3cb7 1887
13003649
WR		 1888error:
1889 dev_kfree_skb(resp);
1890 return rc;
361f3cb7
SO		 1891}
1892
41a8ec49
SO		 1893static int pn533_mod_to_baud(struct pn533 *dev)
1894{
1895 switch (dev->poll_mod_curr) {
1896 case PN533_POLL_MOD_106KBPS_A:
1897 return 0;
1898 case PN533_POLL_MOD_212KBPS_FELICA:
1899 return 1;
1900 case PN533_POLL_MOD_424KBPS_FELICA:
1901 return 2;
1902 default:
1903 return -EINVAL;
1904 }
1905}
1906
d7f3345d 1907#define PASSIVE_DATA_LEN 5
90099433 1908static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1909 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1910{
1911 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 1912 struct sk_buff *skb;
1913 int rc, baud, skb_len;
1914 u8 *next, *arg;
1915
d7f3345d 1916 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 1917
1918 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1919
361f3cb7
SO		 1920 if (dev->poll_mod_count) {
1921 nfc_dev_err(&dev->interface->dev,
5d467742 1922 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 1923 return -EBUSY;
1924 }
1925
1926 if (dev->tgt_active_prot) {
1927 nfc_dev_err(&dev->interface->dev,
5d467742 1928 "There is already an active target");
361f3cb7
SO		 1929 return -EBUSY;
1930 }
1931
41a8ec49
SO		 1932 baud = pn533_mod_to_baud(dev);
1933 if (baud < 0) {
1934 nfc_dev_err(&dev->interface->dev,
1935 "Invalid curr modulation %d", dev->poll_mod_curr);
1936 return baud;
1937 }
1938
13003649 1939 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 1940 if (comm_mode == NFC_COMM_PASSIVE)
13003649 1941 skb_len += PASSIVE_DATA_LEN;
d7f3345d 1942
9e2d493e 1943 skb = pn533_alloc_skb(dev, skb_len);
13003649 1944 if (!skb)
361f3cb7
SO		 1945 return -ENOMEM;
1946
13003649
WR		 1947 *skb_put(skb, 1) = !comm_mode; /* ActPass */
1948 *skb_put(skb, 1) = baud; /* Baud rate */
1949
1950 next = skb_put(skb, 1); /* Next */
1951 *next = 0;
361f3cb7 1952
13003649
WR		 1953 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
1954 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
1955 PASSIVE_DATA_LEN);
1956 *next |= 1;
d7f3345d
SO		 1957 }
1958
47807d3d 1959 if (gb != NULL && gb_len > 0) {
13003649
WR		 1960 memcpy(skb_put(skb, gb_len), gb, gb_len);
1961 *next |= 4; /* We have some Gi */
361f3cb7 1962 } else {
13003649 1963 *next = 0;
361f3cb7
SO		 1964 }
1965
13003649
WR		 1966 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1967 if (!arg) {
1968 dev_kfree_skb(skb);
1969 return -ENOMEM;
1970 }
361f3cb7 1971
13003649 1972 *arg = !comm_mode;
361f3cb7 1973
13003649
WR		 1974 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1975 pn533_in_dep_link_up_complete, arg);
1976
1977 if (rc < 0) {
1978 dev_kfree_skb(skb);
1979 kfree(arg);
1980 }
361f3cb7
SO		 1981
1982 return rc;
1983}
1984
1985static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1986{
6fbbdc16
SO		 1987 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1988
fcfafc76
WR		 1989 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1990
6fbbdc16
SO		 1991 pn533_poll_reset_mod_list(dev);
1992
51ad304c
SO		 1993 if (dev->tgt_mode || dev->tgt_active_prot) {
1994 pn533_send_ack(dev, GFP_KERNEL);
1995 usb_kill_urb(dev->in_urb);
1996 }
1997
1998 dev->tgt_active_prot = 0;
1999 dev->tgt_mode = 0;
2000
2001 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2002
2003 return 0;
2004}
2005
c46ee386 2006struct pn533_data_exchange_arg {
c46ee386
AAJ		 2007 data_exchange_cb_t cb;
2008 void *cb_context;
2009};
2010
6ff73fd2
SO		 2011static struct sk_buff *pn533_build_response(struct pn533 *dev)
2012{
2013 struct sk_buff *skb, *tmp, *t;
2014 unsigned int skb_len = 0, tmp_len = 0;
2015
fcfafc76 2016 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2017
2018 if (skb_queue_empty(&dev->resp_q))
2019 return NULL;
2020
2021 if (skb_queue_len(&dev->resp_q) == 1) {
2022 skb = skb_dequeue(&dev->resp_q);
2023 goto out;
2024 }
2025
2026 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2027 skb_len += tmp->len;
2028
2029 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2030 __func__, skb_len);
2031
2032 skb = alloc_skb(skb_len, GFP_KERNEL);
2033 if (skb == NULL)
2034 goto out;
2035
2036 skb_put(skb, skb_len);
2037
2038 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2039 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2040 tmp_len += tmp->len;
2041 }
2042
2043out:
2044 skb_queue_purge(&dev->resp_q);
2045
2046 return skb;
2047}
2048
c46ee386 2049static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2050 struct sk_buff *resp)
c46ee386
AAJ		 2051{
2052 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2053 struct sk_buff *skb;
2054 int rc = 0;
2055 u8 status, ret, mi;
c46ee386
AAJ		 2056
2057 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2058
b1e666f5
WR		 2059 if (IS_ERR(resp)) {
2060 rc = PTR_ERR(resp);
2061 goto _error;
c46ee386
AAJ		 2062 }
2063
b1e666f5
WR		 2064 status = resp->data[0];
2065 ret = status & PN533_CMD_RET_MASK;
2066 mi = status & PN533_CMD_MI_MASK;
2067
2068 skb_pull(resp, sizeof(status));
c46ee386 2069
b1e666f5
WR		 2070 if (ret != PN533_CMD_RET_SUCCESS) {
2071 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2072 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2073 rc = -EIO;
c46ee386
AAJ		 2074 goto error;
2075 }
2076
b1e666f5 2077 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2078
b1e666f5
WR		 2079 if (mi) {
2080 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2081 queue_work(dev->wq, &dev->mi_work);
2082 return -EINPROGRESS;
c46ee386
AAJ		 2083 }
2084
6ff73fd2 2085 skb = pn533_build_response(dev);
b1e666f5 2086 if (!skb)
6ff73fd2 2087 goto error;
c46ee386 2088
6ff73fd2 2089 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2090 kfree(arg);
2091 return 0;
2092
2093error:
b1e666f5
WR		 2094 dev_kfree_skb(resp);
2095_error:
6ff73fd2 2096 skb_queue_purge(&dev->resp_q);
b1e666f5 2097 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2098 kfree(arg);
b1e666f5 2099 return rc;
c46ee386
AAJ		 2100}
2101
be9ae4ce
SO		 2102static int pn533_transceive(struct nfc_dev *nfc_dev,
2103 struct nfc_target *target, struct sk_buff *skb,
2104 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2105{
2106 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2107 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2108 int rc;
2109
2110 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2111
b1e666f5
WR		 2112 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2113 /* TODO: Implement support to multi-part data exchange */
2114 nfc_dev_err(&dev->interface->dev,
2115 "Data length greater than the max allowed: %d",
2116 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2117 rc = -ENOSYS;
2118 goto error;
2119 }
2120
c46ee386 2121 if (!dev->tgt_active_prot) {
6ca55372
WR		 2122 nfc_dev_err(&dev->interface->dev,
2123 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2124 rc = -EINVAL;
2125 goto error;
2126 }
2127
b1e666f5 2128 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2129 if (!arg) {
2130 rc = -ENOMEM;
b1e666f5 2131 goto error;
c46ee386
AAJ		 2132 }
2133
c46ee386
AAJ		 2134 arg->cb = cb;
2135 arg->cb_context = cb_context;
2136
b1e666f5
WR		 2137 switch (dev->device_type) {
2138 case PN533_DEVICE_PASORI:
2139 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2140 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2141 skb,
2142 pn533_data_exchange_complete,
2143 arg);
2144
2145 break;
2146 }
2147 default:
2148 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2149
2150 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2151 skb, pn533_data_exchange_complete,
2152 arg);
2153
2154 break;
c46ee386
AAJ		 2155 }
2156
b1e666f5
WR		 2157 if (rc < 0) /* rc from send_async */
2158 goto error;
2159
c46ee386
AAJ		 2160 return 0;
2161
c46ee386 2162error:
b1e666f5
WR		 2163 kfree(arg);
2164 dev_kfree_skb(skb);
c46ee386
AAJ		 2165 return rc;
2166}
2167
dadb06f2 2168static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2169 struct sk_buff *resp)
dadb06f2 2170{
e4878823 2171 u8 status;
5b412fd1 2172
dadb06f2
SO		 2173 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2174
e4878823
WR		 2175 if (IS_ERR(resp))
2176 return PTR_ERR(resp);
5b412fd1 2177
e4878823 2178 status = resp->data[0];
dadb06f2 2179
e4878823 2180 dev_kfree_skb(resp);
dadb06f2 2181
e4878823 2182 if (status != 0) {
dadb06f2
SO		 2183 nfc_tm_deactivated(dev->nfc_dev);
2184
51ad304c
SO		 2185 dev->tgt_mode = 0;
2186
dadb06f2
SO		 2187 return 0;
2188 }
2189
2190 queue_work(dev->wq, &dev->tg_work);
2191
2192 return 0;
2193}
2194
2195static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2196{
2197 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2198 int rc;
2199
2200 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2201
e4878823 2202 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2203 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2204 "Data length greater than the max allowed: %d",
2205 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2206 return -ENOSYS;
dadb06f2
SO		 2207 }
2208
e4878823
WR		 2209 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2210 pn533_tm_send_complete, NULL);
2211 if (rc < 0)
2212 dev_kfree_skb(skb);
dadb06f2
SO		 2213
2214 return rc;
2215}
2216
6ff73fd2
SO		 2217static void pn533_wq_mi_recv(struct work_struct *work)
2218{
2219 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2220
2221 struct sk_buff *skb;
6ff73fd2
SO		 2222 int rc;
2223
2224 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2225
9e2d493e 2226 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2227 if (!skb)
2228 goto error;
6ff73fd2 2229
b1e666f5
WR		 2230 switch (dev->device_type) {
2231 case PN533_DEVICE_PASORI:
2232 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2233 rc = pn533_send_cmd_direct_async(dev,
2234 PN533_CMD_IN_COMM_THRU,
2235 skb,
2236 pn533_data_exchange_complete,
2237 dev->cmd_complete_mi_arg);
6ff73fd2 2238
b1e666f5
WR		 2239 break;
2240 }
2241 default:
2242 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2243
b1e666f5
WR		 2244 rc = pn533_send_cmd_direct_async(dev,
2245 PN533_CMD_IN_DATA_EXCHANGE,
2246 skb,
2247 pn533_data_exchange_complete,
2248 dev->cmd_complete_mi_arg);
b1bb290a 2249
b1e666f5 2250 break;
6ff73fd2
SO		 2251 }
2252
b1e666f5 2253 if (rc == 0) /* success */
6ff73fd2
SO		 2254 return;
2255
b1e666f5
WR		 2256 nfc_dev_err(&dev->interface->dev,
2257 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2258
b1e666f5
WR		 2259 dev_kfree_skb(skb);
2260 kfree(dev->cmd_complete_arg);
6ff73fd2 2261
b1e666f5 2262error:
6ff73fd2 2263 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2264 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2265}
2266
c46ee386
AAJ		 2267static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2268 u8 cfgdata_len)
2269{
cb950d93
WR		 2270 struct sk_buff *skb;
2271 struct sk_buff *resp;
2272
2273 int skb_len;
c46ee386
AAJ		 2274
2275 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2276
cb950d93 2277 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2278
9e2d493e 2279 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2280 if (!skb)
2281 return -ENOMEM;
c46ee386 2282
cb950d93
WR		 2283 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2284 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2285
cb950d93
WR		 2286 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2287 if (IS_ERR(resp))
2288 return PTR_ERR(resp);
c46ee386 2289
cb950d93
WR		 2290 dev_kfree_skb(resp);
2291 return 0;
2292}
2293
2294static int pn533_get_firmware_version(struct pn533 *dev,
2295 struct pn533_fw_version *fv)
2296{
2297 struct sk_buff *skb;
2298 struct sk_buff *resp;
2299
9e2d493e 2300 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2301 if (!skb)
2302 return -ENOMEM;
2303
2304 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2305 if (IS_ERR(resp))
2306 return PTR_ERR(resp);
2307
2308 fv->ic = resp->data[0];
2309 fv->ver = resp->data[1];
2310 fv->rev = resp->data[2];
2311 fv->support = resp->data[3];
2312
2313 dev_kfree_skb(resp);
2314 return 0;
c46ee386
AAJ		 2315}
2316
5c7b0531
SO		 2317static int pn533_fw_reset(struct pn533 *dev)
2318{
cb950d93
WR		 2319 struct sk_buff *skb;
2320 struct sk_buff *resp;
5c7b0531
SO		 2321
2322 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2323
9e2d493e 2324 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2325 if (!skb)
2326 return -ENOMEM;
5c7b0531 2327
cb950d93 2328 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2329
cb950d93
WR		 2330 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2331 if (IS_ERR(resp))
2332 return PTR_ERR(resp);
5c7b0531 2333
cb950d93 2334 dev_kfree_skb(resp);
5c7b0531 2335
94c5c156 2336 return 0;
5c7b0531
SO		 2337}
2338
2339static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2340 .dev_up = NULL,
2341 .dev_down = NULL,
361f3cb7
SO		 2342 .dep_link_up = pn533_dep_link_up,
2343 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2344 .start_poll = pn533_start_poll,
2345 .stop_poll = pn533_stop_poll,
2346 .activate_target = pn533_activate_target,
2347 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2348 .im_transceive = pn533_transceive,
dadb06f2 2349 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2350};
2351
5c7b0531
SO		 2352static int pn533_setup(struct pn533 *dev)
2353{
2354 struct pn533_config_max_retries max_retries;
2355 struct pn533_config_timing timing;
2356 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2357 int rc;
2358
2359 switch (dev->device_type) {
2360 case PN533_DEVICE_STD:
2361 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2362 max_retries.mx_rty_psl = 2;
2363 max_retries.mx_rty_passive_act =
2364 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2365
2366 timing.rfu = PN533_CONFIG_TIMING_102;
2367 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2368 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2369
2370 break;
2371
2372 case PN533_DEVICE_PASORI:
2373 max_retries.mx_rty_atr = 0x2;
2374 max_retries.mx_rty_psl = 0x1;
2375 max_retries.mx_rty_passive_act =
2376 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2377
2378 timing.rfu = PN533_CONFIG_TIMING_102;
2379 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2380 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2381
2382 break;
2383
2384 default:
2385 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2386 dev->device_type);
2387 return -EINVAL;
2388 }
2389
2390 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2391 (u8 *)&max_retries, sizeof(max_retries));
2392 if (rc) {
2393 nfc_dev_err(&dev->interface->dev,
2394 "Error on setting MAX_RETRIES config");
2395 return rc;
2396 }
2397
2398
2399 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2400 (u8 *)&timing, sizeof(timing));
2401 if (rc) {
2402 nfc_dev_err(&dev->interface->dev,
2403 "Error on setting RF timings");
2404 return rc;
2405 }
2406
2407 switch (dev->device_type) {
2408 case PN533_DEVICE_STD:
2409 break;
2410
2411 case PN533_DEVICE_PASORI:
2412 pn533_fw_reset(dev);
2413
2414 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2415 pasori_cfg, 3);
2416 if (rc) {
2417 nfc_dev_err(&dev->interface->dev,
2418 "Error while settings PASORI config");
2419 return rc;
2420 }
2421
2422 pn533_fw_reset(dev);
2423
2424 break;
2425 }
2426
2427 return 0;
2428}
2429
c46ee386
AAJ		 2430static int pn533_probe(struct usb_interface *interface,
2431 const struct usb_device_id *id)
2432{
cb950d93 2433 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2434 struct pn533 *dev;
2435 struct usb_host_interface *iface_desc;
2436 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2437 int in_endpoint = 0;
2438 int out_endpoint = 0;
2439 int rc = -ENOMEM;
2440 int i;
2441 u32 protocols;
2442
2443 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2444 if (!dev)
2445 return -ENOMEM;
2446
2447 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2448 dev->interface = interface;
0201ed03 2449 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2450
2451 iface_desc = interface->cur_altsetting;
2452 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2453 endpoint = &iface_desc->endpoint[i].desc;
2454
8d25ca79 2455 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2456 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2457
8d25ca79 2458 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2459 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2460 }
2461
2462 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2463 nfc_dev_err(&interface->dev,
2464 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2465 rc = -ENODEV;
2466 goto error;
2467 }
2468
c46ee386 2469 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2470 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2471
a5798094 2472 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2473 goto error;
2474
2475 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2476 usb_rcvbulkpipe(dev->udev, in_endpoint),
2477 NULL, 0, NULL, dev);
c46ee386 2478 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2479 usb_sndbulkpipe(dev->udev, out_endpoint),
2480 NULL, 0, pn533_send_complete, dev);
c46ee386 2481
5d50b364
SO		 2482 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2483 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2484 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2485 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2486 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2487 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2488 if (dev->wq == NULL)
2489 goto error;
c46ee386 2490
6fbbdc16
SO		 2491 init_timer(&dev->listen_timer);
2492 dev->listen_timer.data = (unsigned long) dev;
2493 dev->listen_timer.function = pn533_listen_mode_timer;
2494
6ff73fd2
SO		 2495 skb_queue_head_init(&dev->resp_q);
2496
5d50b364
SO		 2497 INIT_LIST_HEAD(&dev->cmd_queue);
2498
c46ee386
AAJ		 2499 usb_set_intfdata(interface, dev);
2500
9e2d493e 2501 dev->ops = &pn533_std_frame_ops;
c46ee386 2502
5c7b0531
SO		 2503 dev->device_type = id->driver_info;
2504 switch (dev->device_type) {
2505 case PN533_DEVICE_STD:
2506 protocols = PN533_ALL_PROTOCOLS;
2507 break;
2508
2509 case PN533_DEVICE_PASORI:
2510 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2511 break;
2512
2513 default:
2514 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2515 dev->device_type);
2516 rc = -EINVAL;
2517 goto destroy_wq;
2518 }
c46ee386 2519
9e2d493e
WR		 2520 memset(&fw_ver, 0, sizeof(fw_ver));
2521 rc = pn533_get_firmware_version(dev, &fw_ver);
2522 if (rc < 0)
2523 goto destroy_wq;
2524
2525 nfc_dev_info(&dev->interface->dev,
2526 "NXP PN533 firmware ver %d.%d now attached",
2527 fw_ver.ver, fw_ver.rev);
2528
2529
e8753043 2530 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
390a1bd8 2531 NFC_SE_NONE,
9e2d493e 2532 dev->ops->tx_header_len +
e8753043 2533 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2534 dev->ops->tx_tail_len);
c46ee386 2535 if (!dev->nfc_dev)
4849f85e 2536 goto destroy_wq;
c46ee386
AAJ		 2537
2538 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2539 nfc_set_drvdata(dev->nfc_dev, dev);
2540
2541 rc = nfc_register_device(dev->nfc_dev);
2542 if (rc)
2543 goto free_nfc_dev;
2544
5c7b0531
SO		 2545 rc = pn533_setup(dev);
2546 if (rc)
34a85bfc 2547 goto unregister_nfc_dev;
34a85bfc 2548
c46ee386
AAJ		 2549 return 0;
2550
9f2f8ba1
SO		 2551unregister_nfc_dev:
2552 nfc_unregister_device(dev->nfc_dev);
2553
c46ee386
AAJ		 2554free_nfc_dev:
2555 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2556
4849f85e
SO		 2557destroy_wq:
2558 destroy_workqueue(dev->wq);
c46ee386 2559error:
c46ee386 2560 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2561 usb_free_urb(dev->out_urb);
2562 kfree(dev);
2563 return rc;
2564}
2565
2566static void pn533_disconnect(struct usb_interface *interface)
2567{
2568 struct pn533 *dev;
5d50b364 2569 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2570
2571 dev = usb_get_intfdata(interface);
2572 usb_set_intfdata(interface, NULL);
2573
2574 nfc_unregister_device(dev->nfc_dev);
2575 nfc_free_device(dev->nfc_dev);
2576
2577 usb_kill_urb(dev->in_urb);
2578 usb_kill_urb(dev->out_urb);
2579
4849f85e 2580 destroy_workqueue(dev->wq);
c46ee386 2581
6ff73fd2
SO		 2582 skb_queue_purge(&dev->resp_q);
2583
6fbbdc16
SO		 2584 del_timer(&dev->listen_timer);
2585
5d50b364
SO		 2586 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2587 list_del(&cmd->queue);
2588 kfree(cmd);
2589 }
2590
c46ee386 2591 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2592 usb_free_urb(dev->out_urb);
2593 kfree(dev);
2594
276556db 2595 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2596}
2597
2598static struct usb_driver pn533_driver = {
2599 .name = "pn533",
2600 .probe = pn533_probe,
2601 .disconnect = pn533_disconnect,
2602 .id_table = pn533_table,
2603};
2604
fe748483 2605module_usb_driver(pn533_driver);
c46ee386 2606
e70b96e9
WR		 2607MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2608MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2609MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2610MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2611MODULE_VERSION(VERSION);
2612MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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