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NFC: pn533: Fix memleak while scheduling next cmd
[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;
0ce1fbdd 889 int rc;
5d50b364
SO		 890
891 mutex_lock(&dev->cmd_lock);
892
893 if (list_empty(&dev->cmd_queue)) {
894 dev->cmd_pending = 0;
895 mutex_unlock(&dev->cmd_lock);
896 return;
897 }
898
899 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
900
60ad07ab
SJ		 901 list_del(&cmd->queue);
902
5d50b364
SO		 903 mutex_unlock(&dev->cmd_lock);
904
0ce1fbdd
WR		 905 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len,
906 pn533_send_async_complete, cmd->arg);
907 if (rc < 0) {
908 dev_kfree_skb(cmd->req);
909 dev_kfree_skb(cmd->resp);
910 kfree(cmd->arg);
911 }
5d50b364 912
5d50b364
SO		 913 kfree(cmd);
914}
915
c46ee386 916struct pn533_sync_cmd_response {
94c5c156 917 struct sk_buff *resp;
c46ee386
AAJ		 918 struct completion done;
919};
920
94c5c156
WR		 921static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
922 struct sk_buff *resp)
923{
924 struct pn533_sync_cmd_response *arg = _arg;
925
94c5c156
WR		 926 arg->resp = resp;
927 complete(&arg->done);
928
929 return 0;
930}
931
932/* pn533_send_cmd_sync
933 *
934 * Please note the req parameter is freed inside the function to
935 * limit a number of return value interpretations by the caller.
936 *
937 * 1. negative in case of error during TX path -> req should be freed
938 *
939 * 2. negative in case of error during RX path -> req should not be freed
940 * as it's been already freed at the begining of RX path by
941 * async_complete_cb.
942 *
943 * 3. valid pointer in case of succesfult RX path
944 *
945 * A caller has to check a return value with IS_ERR macro. If the test pass,
946 * the returned pointer is valid.
947 *
948 * */
949static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
950 struct sk_buff *req)
951{
952 int rc;
953 struct pn533_sync_cmd_response arg;
954
94c5c156
WR		 955 init_completion(&arg.done);
956
957 rc = pn533_send_cmd_async(dev, cmd_code, req,
958 pn533_send_sync_complete, &arg);
959 if (rc) {
960 dev_kfree_skb(req);
961 return ERR_PTR(rc);
962 }
963
964 wait_for_completion(&arg.done);
965
966 return arg.resp;
967}
968
c46ee386
AAJ		 969static void pn533_send_complete(struct urb *urb)
970{
971 struct pn533 *dev = urb->context;
972
c46ee386
AAJ		 973 switch (urb->status) {
974 case 0:
f8f99171 975 break; /* success */
c46ee386
AAJ		 976 case -ECONNRESET:
977 case -ENOENT:
6ca55372 978 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 979 "The urb has been stopped (status %d)",
980 urb->status);
c46ee386 981 break;
f8f99171 982 case -ESHUTDOWN:
c46ee386 983 default:
f8f99171
WR		 984 nfc_dev_err(&dev->interface->dev,
985 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 986 }
987}
988
9e2d493e 989static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 990{
991 struct sk_buff *skb;
992
9e2d493e 993 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 994 size +
9e2d493e 995 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 996
997 if (skb)
9e2d493e 998 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 999
1000 return skb;
1001}
1002
c46ee386
AAJ		 1003struct pn533_target_type_a {
1004 __be16 sens_res;
1005 u8 sel_res;
1006 u8 nfcid_len;
1007 u8 nfcid_data[];
1008} __packed;
1009
1010
1011#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1012#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1013#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1014
1015#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1016#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1017
1018#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1019#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1020
1021#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1022#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1023#define PN533_TYPE_A_SEL_PROT_DEP 2
1024#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1025
1026static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1027 int target_data_len)
1028{
1029 u8 ssd;
1030 u8 platconf;
1031
1032 if (target_data_len < sizeof(struct pn533_target_type_a))
1033 return false;
1034
1035 /* The lenght check of nfcid[] and ats[] are not being performed because
1036 the values are not being used */
1037
1038 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1039 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1040 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1041
1042 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1043 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1044 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1045 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1046 return false;
1047
1048 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1049 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1050 return false;
1051
1052 return true;
1053}
1054
1055static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1056 int tgt_data_len)
1057{
1058 struct pn533_target_type_a *tgt_type_a;
1059
37cf4fc6 1060 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1061
1062 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1063 return -EPROTO;
1064
1065 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1066 case PN533_TYPE_A_SEL_PROT_MIFARE:
1067 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1068 break;
1069 case PN533_TYPE_A_SEL_PROT_ISO14443:
1070 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1071 break;
1072 case PN533_TYPE_A_SEL_PROT_DEP:
1073 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1074 break;
1075 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1076 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1077 NFC_PROTO_NFC_DEP_MASK;
1078 break;
1079 }
1080
1081 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1082 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1083 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1084 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1085
1086 return 0;
1087}
1088
1089struct pn533_target_felica {
1090 u8 pol_res;
1091 u8 opcode;
1092 u8 nfcid2[8];
1093 u8 pad[8];
1094 /* optional */
1095 u8 syst_code[];
1096} __packed;
1097
1098#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1099#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1100
1101static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1102 int target_data_len)
1103{
1104 if (target_data_len < sizeof(struct pn533_target_felica))
1105 return false;
1106
1107 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1108 return false;
1109
1110 return true;
1111}
1112
1113static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1114 int tgt_data_len)
1115{
1116 struct pn533_target_felica *tgt_felica;
1117
37cf4fc6 1118 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1119
1120 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1121 return -EPROTO;
1122
5d467742
WR		 1123 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1124 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1125 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1126 else
1127 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1128
7975754f
SO		 1129 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1130 nfc_tgt->sensf_res_len = 9;
1131
c46ee386
AAJ		 1132 return 0;
1133}
1134
1135struct pn533_target_jewel {
1136 __be16 sens_res;
1137 u8 jewelid[4];
1138} __packed;
1139
1140static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1141 int target_data_len)
1142{
1143 u8 ssd;
1144 u8 platconf;
1145
1146 if (target_data_len < sizeof(struct pn533_target_jewel))
1147 return false;
1148
1149 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1150 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1151 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1152
1153 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1154 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1155 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1156 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1157 return false;
1158
1159 return true;
1160}
1161
1162static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1163 int tgt_data_len)
1164{
1165 struct pn533_target_jewel *tgt_jewel;
1166
37cf4fc6 1167 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1168
1169 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1170 return -EPROTO;
1171
1172 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1173 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1174 nfc_tgt->nfcid1_len = 4;
1175 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1176
1177 return 0;
1178}
1179
1180struct pn533_type_b_prot_info {
1181 u8 bitrate;
1182 u8 fsci_type;
1183 u8 fwi_adc_fo;
1184} __packed;
1185
1186#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1187#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1188#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1189
1190struct pn533_type_b_sens_res {
1191 u8 opcode;
1192 u8 nfcid[4];
1193 u8 appdata[4];
1194 struct pn533_type_b_prot_info prot_info;
1195} __packed;
1196
1197#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1198
1199struct pn533_target_type_b {
1200 struct pn533_type_b_sens_res sensb_res;
1201 u8 attrib_res_len;
1202 u8 attrib_res[];
1203} __packed;
1204
1205static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1206 int target_data_len)
1207{
1208 if (target_data_len < sizeof(struct pn533_target_type_b))
1209 return false;
1210
1211 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1212 return false;
1213
1214 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1215 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1216 return false;
1217
1218 return true;
1219}
1220
1221static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1222 int tgt_data_len)
1223{
1224 struct pn533_target_type_b *tgt_type_b;
1225
37cf4fc6 1226 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1227
1228 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1229 return -EPROTO;
1230
01d719a2 1231 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1232
1233 return 0;
1234}
1235
b5193e5d
WR		 1236static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1237 int tgdata_len)
c46ee386 1238{
c46ee386
AAJ		 1239 struct nfc_target nfc_tgt;
1240 int rc;
1241
1242 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1243 dev->poll_mod_curr);
c46ee386 1244
b5193e5d 1245 if (tg != 1)
c46ee386
AAJ		 1246 return -EPROTO;
1247
98b3ac1b
SO		 1248 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1249
c46ee386
AAJ		 1250 switch (dev->poll_mod_curr) {
1251 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1252 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1253 break;
1254 case PN533_POLL_MOD_212KBPS_FELICA:
1255 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1256 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1257 break;
1258 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1259 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1260 break;
1261 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1262 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1263 break;
1264 default:
b5193e5d
WR		 1265 nfc_dev_err(&dev->interface->dev,
1266 "Unknown current poll modulation");
c46ee386
AAJ		 1267 return -EPROTO;
1268 }
1269
1270 if (rc)
1271 return rc;
1272
1273 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1274 nfc_dev_dbg(&dev->interface->dev,
1275 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1276 return -EAGAIN;
1277 }
1278
b5193e5d
WR		 1279 nfc_dev_dbg(&dev->interface->dev,
1280 "Target found - supported protocols: 0x%x",
1281 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1282
1283 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1284
1285 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1286
1287 return 0;
1288}
1289
6fbbdc16
SO		 1290static inline void pn533_poll_next_mod(struct pn533 *dev)
1291{
1292 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1293}
1294
c46ee386
AAJ		 1295static void pn533_poll_reset_mod_list(struct pn533 *dev)
1296{
1297 dev->poll_mod_count = 0;
1298}
1299
1300static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1301{
1302 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1303 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1304 dev->poll_mod_count++;
1305}
1306
6fbbdc16
SO		 1307static void pn533_poll_create_mod_list(struct pn533 *dev,
1308 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1309{
1310 pn533_poll_reset_mod_list(dev);
1311
b08e8603
WR		 1312 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1313 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1314 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1315 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1316
b08e8603
WR		 1317 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1318 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1319 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1320 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1321 }
1322
6fbbdc16 1323 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1324 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1325
01d719a2 1326 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1327 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1328
6fbbdc16
SO		 1329 if (tm_protocols)
1330 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1331}
1332
b5193e5d 1333static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1334{
b5193e5d
WR		 1335 u8 nbtg, tg, *tgdata;
1336 int rc, tgdata_len;
c46ee386
AAJ		 1337
1338 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1339
b5193e5d
WR		 1340 nbtg = resp->data[0];
1341 tg = resp->data[1];
1342 tgdata = &resp->data[2];
1343 tgdata_len = resp->len - 2; /* nbtg + tg */
1344
1345 if (nbtg) {
1346 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1347
1348 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1349 if (rc == 0) {
1350 pn533_poll_reset_mod_list(dev);
1351 return 0;
1352 }
c46ee386
AAJ		 1353 }
1354
6fbbdc16 1355 return -EAGAIN;
c46ee386
AAJ		 1356}
1357
9e2d493e 1358static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1359{
b5193e5d
WR		 1360 struct sk_buff *skb;
1361 u8 *felica, *nfcid3, *gb;
1362
9e2d493e
WR		 1363 u8 *gbytes = dev->gb;
1364 size_t gbytes_len = dev->gb_len;
1365
51d9e803
SO		 1366 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1367 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1368 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1369 0xff, 0xff}; /* System code */
b5193e5d 1370
51d9e803
SO		 1371 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1372 0x0, 0x0, 0x0,
1373 0x40}; /* SEL_RES for DEP */
ad3823ce 1374
b5193e5d
WR		 1375 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1376 felica (18), nfcid3 (10), gb_len (1) */
1377 gbytes_len +
1378 1; /* len Tk*/
ad3823ce 1379
9e2d493e 1380 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1381 if (!skb)
1382 return NULL;
ad3823ce
SO		 1383
1384 /* DEP support only */
52f2eaee 1385 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1386
1387 /* MIFARE params */
1388 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1389
1390 /* Felica params */
b5193e5d
WR		 1391 felica = skb_put(skb, 18);
1392 memcpy(felica, felica_params, 18);
1393 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1394
1395 /* NFCID3 */
b5193e5d
WR		 1396 nfcid3 = skb_put(skb, 10);
1397 memset(nfcid3, 0, 10);
1398 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1399
1400 /* General bytes */
b5193e5d 1401 *skb_put(skb, 1) = gbytes_len;
51d9e803 1402
b5193e5d
WR		 1403 gb = skb_put(skb, gbytes_len);
1404 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1405
b5193e5d
WR		 1406 /* Len Tk */
1407 *skb_put(skb, 1) = 0;
51d9e803 1408
b5193e5d 1409 return skb;
ad3823ce
SO		 1410}
1411
b1bb290a 1412#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1413#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1414static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1415 struct sk_buff *resp)
103b34cf 1416{
e4878823 1417 u8 status;
103b34cf
SO		 1418
1419 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1420
e4878823
WR		 1421 if (IS_ERR(resp))
1422 return PTR_ERR(resp);
103b34cf 1423
e4878823
WR		 1424 status = resp->data[0];
1425 skb_pull(resp, sizeof(status));
103b34cf 1426
e4878823 1427 if (status != 0) {
103b34cf 1428 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1429 dev->tgt_mode = 0;
e4878823 1430 dev_kfree_skb(resp);
103b34cf
SO		 1431 return 0;
1432 }
1433
e4878823 1434 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1435}
1436
1437static void pn533_wq_tg_get_data(struct work_struct *work)
1438{
1439 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1440
e4878823
WR		 1441 struct sk_buff *skb;
1442 int rc;
103b34cf 1443
e4878823 1444 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1445
9e2d493e 1446 skb = pn533_alloc_skb(dev, 0);
e4878823 1447 if (!skb)
103b34cf
SO		 1448 return;
1449
e4878823
WR		 1450 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1451 pn533_tm_get_data_complete, NULL);
103b34cf 1452
e4878823
WR		 1453 if (rc < 0)
1454 dev_kfree_skb(skb);
103b34cf
SO		 1455
1456 return;
1457}
1458
fc40a8c1 1459#define ATR_REQ_GB_OFFSET 17
b5193e5d 1460static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1461{
b5193e5d 1462 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1463 size_t gb_len;
103b34cf 1464 int rc;
ad3823ce
SO		 1465
1466 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1467
b5193e5d 1468 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1469 return -EINVAL;
1470
b5193e5d
WR		 1471 mode = resp->data[0];
1472 cmd = &resp->data[1];
ad3823ce 1473
b5193e5d
WR		 1474 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1475 mode, resp->len);
ad3823ce 1476
b5193e5d
WR		 1477 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1478 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1479 comm_mode = NFC_COMM_ACTIVE;
1480
b5193e5d 1481 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1482 return -EOPNOTSUPP;
1483
b5193e5d
WR		 1484 gb = cmd + ATR_REQ_GB_OFFSET;
1485 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1486
103b34cf
SO		 1487 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1488 comm_mode, gb, gb_len);
1489 if (rc < 0) {
1490 nfc_dev_err(&dev->interface->dev,
1491 "Error when signaling target activation");
1492 return rc;
1493 }
1494
51ad304c 1495 dev->tgt_mode = 1;
103b34cf
SO		 1496 queue_work(dev->wq, &dev->tg_work);
1497
1498 return 0;
fe7c5800
SO		 1499}
1500
6fbbdc16 1501static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1502{
37cf4fc6 1503 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1504
1505 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1506
1507 /* An ack will cancel the last issued command (poll) */
1508 pn533_send_ack(dev, GFP_ATOMIC);
1509
1510 dev->cancel_listen = 1;
1511
6fbbdc16
SO		 1512 pn533_poll_next_mod(dev);
1513
1514 queue_work(dev->wq, &dev->poll_work);
1515}
1516
1517static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1518 struct sk_buff *resp)
6fbbdc16
SO		 1519{
1520 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1521 int rc;
1522
6fbbdc16 1523 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1524
b5193e5d
WR		 1525 if (IS_ERR(resp)) {
1526 rc = PTR_ERR(resp);
1527
1528 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1529 __func__, rc);
1530
1531 if (rc == -ENOENT) {
1532 if (dev->poll_mod_count != 0)
1533 return rc;
1534 else
1535 goto stop_poll;
1536 } else if (rc < 0) {
1537 nfc_dev_err(&dev->interface->dev,
1538 "Error %d when running poll", rc);
1539 goto stop_poll;
1540 }
6fbbdc16 1541 }
ad3823ce 1542
6fbbdc16
SO		 1543 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1544
b5193e5d 1545 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1546 del_timer(&dev->listen_timer);
b5193e5d
WR		 1547 rc = pn533_init_target_complete(dev, resp);
1548 goto done;
6fbbdc16
SO		 1549 }
1550
b5193e5d
WR		 1551 /* Initiator mode */
1552 rc = pn533_start_poll_complete(dev, resp);
1553 if (!rc)
1554 goto done;
6fbbdc16 1555
95cb9e10
WR		 1556 if (!dev->poll_mod_count) {
1557 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1558 goto done;
1559 }
1560
b5193e5d 1561 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1562 queue_work(dev->wq, &dev->poll_work);
1563
b5193e5d
WR		 1564done:
1565 dev_kfree_skb(resp);
1566 return rc;
6fbbdc16
SO		 1567
1568stop_poll:
b5193e5d
WR		 1569 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1570
6fbbdc16
SO		 1571 pn533_poll_reset_mod_list(dev);
1572 dev->poll_protocols = 0;
b5193e5d 1573 return rc;
ad3823ce
SO		 1574}
1575
9e2d493e
WR		 1576static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1577 struct pn533_poll_modulations *mod)
c46ee386 1578{
b5193e5d 1579 struct sk_buff *skb;
c46ee386 1580
9e2d493e 1581 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1582 if (!skb)
1583 return NULL;
c46ee386 1584
b5193e5d 1585 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1586
b5193e5d 1587 return skb;
6fbbdc16 1588}
c46ee386 1589
6fbbdc16
SO		 1590static int pn533_send_poll_frame(struct pn533 *dev)
1591{
b5193e5d
WR		 1592 struct pn533_poll_modulations *mod;
1593 struct sk_buff *skb;
6fbbdc16 1594 int rc;
b5193e5d 1595 u8 cmd_code;
c46ee386 1596
b5193e5d 1597 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1598
b5193e5d
WR		 1599 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1600 __func__, mod->len);
c46ee386 1601
b5193e5d
WR		 1602 if (mod->len == 0) { /* Listen mode */
1603 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1604 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1605 } else { /* Polling mode */
1606 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1607 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1608 }
1609
1610 if (!skb) {
1611 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1612 return -ENOMEM;
1613 }
1614
1615 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1616 NULL);
1617 if (rc < 0) {
1618 dev_kfree_skb(skb);
6fbbdc16 1619 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1620 }
c46ee386 1621
6fbbdc16
SO		 1622 return rc;
1623}
1624
1625static void pn533_wq_poll(struct work_struct *work)
1626{
1627 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1628 struct pn533_poll_modulations *cur_mod;
1629 int rc;
1630
1631 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1632
1633 nfc_dev_dbg(&dev->interface->dev,
1634 "%s cancel_listen %d modulation len %d",
1635 __func__, dev->cancel_listen, cur_mod->len);
1636
1637 if (dev->cancel_listen == 1) {
1638 dev->cancel_listen = 0;
1639 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1640 }
1641
6fbbdc16
SO		 1642 rc = pn533_send_poll_frame(dev);
1643 if (rc)
1644 return;
c46ee386 1645
6fbbdc16
SO		 1646 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1647 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1648
6fbbdc16 1649 return;
c46ee386
AAJ		 1650}
1651
fe7c5800
SO		 1652static int pn533_start_poll(struct nfc_dev *nfc_dev,
1653 u32 im_protocols, u32 tm_protocols)
1654{
1655 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1656
1657 nfc_dev_dbg(&dev->interface->dev,
1658 "%s: im protocols 0x%x tm protocols 0x%x",
1659 __func__, im_protocols, tm_protocols);
1660
1661 if (dev->tgt_active_prot) {
1662 nfc_dev_err(&dev->interface->dev,
1663 "Cannot poll with a target already activated");
1664 return -EBUSY;
1665 }
1666
51ad304c
SO		 1667 if (dev->tgt_mode) {
1668 nfc_dev_err(&dev->interface->dev,
1669 "Cannot poll while already being activated");
1670 return -EBUSY;
1671 }
1672
6fbbdc16
SO		 1673 if (tm_protocols) {
1674 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1675 if (dev->gb == NULL)
1676 tm_protocols = 0;
1677 }
ad3823ce 1678
6fbbdc16
SO		 1679 dev->poll_mod_curr = 0;
1680 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1681 dev->poll_protocols = im_protocols;
1682 dev->listen_protocols = tm_protocols;
ad3823ce 1683
6fbbdc16 1684 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1685}
1686
c46ee386
AAJ		 1687static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1688{
1689 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1690
1691 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1692
6fbbdc16
SO		 1693 del_timer(&dev->listen_timer);
1694
c46ee386 1695 if (!dev->poll_mod_count) {
6ca55372
WR		 1696 nfc_dev_dbg(&dev->interface->dev,
1697 "Polling operation was not running");
c46ee386
AAJ		 1698 return;
1699 }
1700
1701 /* An ack will cancel the last issued command (poll) */
1702 pn533_send_ack(dev, GFP_KERNEL);
1703
1704 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1705 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1706
1707 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1708}
1709
1710static int pn533_activate_target_nfcdep(struct pn533 *dev)
1711{
cb950d93 1712 struct pn533_cmd_activate_response *rsp;
541d920b 1713 u16 gt_len;
c46ee386
AAJ		 1714 int rc;
1715
cb950d93
WR		 1716 struct sk_buff *skb;
1717 struct sk_buff *resp;
c46ee386 1718
cb950d93 1719 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1720
9e2d493e 1721 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1722 if (!skb)
1723 return -ENOMEM;
c46ee386 1724
cb950d93
WR		 1725 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1726 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1727
cb950d93
WR		 1728 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1729 if (IS_ERR(resp))
1730 return PTR_ERR(resp);
c46ee386 1731
37cf4fc6 1732 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1733 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1734 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1735 nfc_dev_err(&dev->interface->dev,
1736 "Target activation failed (error 0x%x)", rc);
cb950d93 1737 dev_kfree_skb(resp);
c46ee386 1738 return -EIO;
8a0ecfe7 1739 }
c46ee386 1740
541d920b 1741 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1742 gt_len = resp->len - 16;
1743 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1744
cb950d93 1745 dev_kfree_skb(resp);
541d920b 1746 return rc;
c46ee386
AAJ		 1747}
1748
90099433
EL		 1749static int pn533_activate_target(struct nfc_dev *nfc_dev,
1750 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1751{
1752 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1753 int rc;
1754
1755 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1756 protocol);
c46ee386
AAJ		 1757
1758 if (dev->poll_mod_count) {
6ca55372
WR		 1759 nfc_dev_err(&dev->interface->dev,
1760 "Cannot activate while polling");
c46ee386
AAJ		 1761 return -EBUSY;
1762 }
1763
1764 if (dev->tgt_active_prot) {
6ca55372
WR		 1765 nfc_dev_err(&dev->interface->dev,
1766 "There is already an active target");
c46ee386
AAJ		 1767 return -EBUSY;
1768 }
1769
1770 if (!dev->tgt_available_prots) {
6ca55372
WR		 1771 nfc_dev_err(&dev->interface->dev,
1772 "There is no available target to activate");
c46ee386
AAJ		 1773 return -EINVAL;
1774 }
1775
1776 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1777 nfc_dev_err(&dev->interface->dev,
1778 "Target doesn't support requested proto %u",
1779 protocol);
c46ee386
AAJ		 1780 return -EINVAL;
1781 }
1782
1783 if (protocol == NFC_PROTO_NFC_DEP) {
1784 rc = pn533_activate_target_nfcdep(dev);
1785 if (rc) {
6ca55372
WR		 1786 nfc_dev_err(&dev->interface->dev,
1787 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1788 return rc;
1789 }
1790 }
1791
1792 dev->tgt_active_prot = protocol;
1793 dev->tgt_available_prots = 0;
1794
1795 return 0;
1796}
1797
90099433
EL		 1798static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1799 struct nfc_target *target)
c46ee386
AAJ		 1800{
1801 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1802
1803 struct sk_buff *skb;
1804 struct sk_buff *resp;
1805
c46ee386
AAJ		 1806 int rc;
1807
1808 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1809
1810 if (!dev->tgt_active_prot) {
1811 nfc_dev_err(&dev->interface->dev, "There is no active target");
1812 return;
1813 }
1814
1815 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1816 skb_queue_purge(&dev->resp_q);
1817
9e2d493e 1818 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1819 if (!skb)
1820 return;
c46ee386 1821
cb950d93 1822 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1823
cb950d93
WR		 1824 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1825 if (IS_ERR(resp))
c46ee386 1826 return;
c46ee386 1827
cb950d93 1828 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1829 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1830 nfc_dev_err(&dev->interface->dev,
1831 "Error 0x%x when releasing the target", rc);
c46ee386 1832
cb950d93 1833 dev_kfree_skb(resp);
c46ee386
AAJ		 1834 return;
1835}
1836
361f3cb7
SO		 1837
1838static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1839 struct sk_buff *resp)
361f3cb7 1840{
13003649 1841 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1842 u8 target_gt_len;
1843 int rc;
13003649 1844 u8 active = *(u8 *)arg;
70418e6e
WR		 1845
1846 kfree(arg);
361f3cb7 1847
13003649
WR		 1848 if (IS_ERR(resp))
1849 return PTR_ERR(resp);
361f3cb7
SO		 1850
1851 if (dev->tgt_available_prots &&
1852 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1853 nfc_dev_err(&dev->interface->dev,
5d467742 1854 "The target does not support DEP");
13003649
WR		 1855 rc = -EINVAL;
1856 goto error;
361f3cb7
SO		 1857 }
1858
13003649
WR		 1859 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1860
1861 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1862 if (rc != PN533_CMD_RET_SUCCESS) {
1863 nfc_dev_err(&dev->interface->dev,
a45e1c8d 1864 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 1865 goto error;
361f3cb7
SO		 1866 }
1867
1868 if (!dev->tgt_available_prots) {
13003649
WR		 1869 struct nfc_target nfc_target;
1870
361f3cb7
SO		 1871 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1872
1873 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1874 nfc_target.nfcid1_len = 10;
13003649 1875 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1876 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1877 if (rc)
13003649 1878 goto error;
361f3cb7
SO		 1879
1880 dev->tgt_available_prots = 0;
1881 }
1882
1883 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1884
1885 /* ATR_RES general bytes are located at offset 17 */
13003649 1886 target_gt_len = resp->len - 17;
361f3cb7 1887 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1888 rsp->gt, target_gt_len);
361f3cb7
SO		 1889 if (rc == 0)
1890 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1891 dev->nfc_dev->targets[0].idx,
1892 !active, NFC_RF_INITIATOR);
361f3cb7 1893
13003649
WR		 1894error:
1895 dev_kfree_skb(resp);
1896 return rc;
361f3cb7
SO		 1897}
1898
41a8ec49
SO		 1899static int pn533_mod_to_baud(struct pn533 *dev)
1900{
1901 switch (dev->poll_mod_curr) {
1902 case PN533_POLL_MOD_106KBPS_A:
1903 return 0;
1904 case PN533_POLL_MOD_212KBPS_FELICA:
1905 return 1;
1906 case PN533_POLL_MOD_424KBPS_FELICA:
1907 return 2;
1908 default:
1909 return -EINVAL;
1910 }
1911}
1912
d7f3345d 1913#define PASSIVE_DATA_LEN 5
90099433 1914static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1915 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1916{
1917 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 1918 struct sk_buff *skb;
1919 int rc, baud, skb_len;
1920 u8 *next, *arg;
1921
d7f3345d 1922 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 1923
1924 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1925
361f3cb7
SO		 1926 if (dev->poll_mod_count) {
1927 nfc_dev_err(&dev->interface->dev,
5d467742 1928 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 1929 return -EBUSY;
1930 }
1931
1932 if (dev->tgt_active_prot) {
1933 nfc_dev_err(&dev->interface->dev,
5d467742 1934 "There is already an active target");
361f3cb7
SO		 1935 return -EBUSY;
1936 }
1937
41a8ec49
SO		 1938 baud = pn533_mod_to_baud(dev);
1939 if (baud < 0) {
1940 nfc_dev_err(&dev->interface->dev,
1941 "Invalid curr modulation %d", dev->poll_mod_curr);
1942 return baud;
1943 }
1944
13003649 1945 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 1946 if (comm_mode == NFC_COMM_PASSIVE)
13003649 1947 skb_len += PASSIVE_DATA_LEN;
d7f3345d 1948
9e2d493e 1949 skb = pn533_alloc_skb(dev, skb_len);
13003649 1950 if (!skb)
361f3cb7
SO		 1951 return -ENOMEM;
1952
13003649
WR		 1953 *skb_put(skb, 1) = !comm_mode; /* ActPass */
1954 *skb_put(skb, 1) = baud; /* Baud rate */
1955
1956 next = skb_put(skb, 1); /* Next */
1957 *next = 0;
361f3cb7 1958
13003649
WR		 1959 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
1960 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
1961 PASSIVE_DATA_LEN);
1962 *next |= 1;
d7f3345d
SO		 1963 }
1964
47807d3d 1965 if (gb != NULL && gb_len > 0) {
13003649
WR		 1966 memcpy(skb_put(skb, gb_len), gb, gb_len);
1967 *next |= 4; /* We have some Gi */
361f3cb7 1968 } else {
13003649 1969 *next = 0;
361f3cb7
SO		 1970 }
1971
13003649
WR		 1972 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1973 if (!arg) {
1974 dev_kfree_skb(skb);
1975 return -ENOMEM;
1976 }
361f3cb7 1977
13003649 1978 *arg = !comm_mode;
361f3cb7 1979
13003649
WR		 1980 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1981 pn533_in_dep_link_up_complete, arg);
1982
1983 if (rc < 0) {
1984 dev_kfree_skb(skb);
1985 kfree(arg);
1986 }
361f3cb7
SO		 1987
1988 return rc;
1989}
1990
1991static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1992{
6fbbdc16
SO		 1993 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1994
fcfafc76
WR		 1995 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1996
6fbbdc16
SO		 1997 pn533_poll_reset_mod_list(dev);
1998
51ad304c
SO		 1999 if (dev->tgt_mode || dev->tgt_active_prot) {
2000 pn533_send_ack(dev, GFP_KERNEL);
2001 usb_kill_urb(dev->in_urb);
2002 }
2003
2004 dev->tgt_active_prot = 0;
2005 dev->tgt_mode = 0;
2006
2007 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2008
2009 return 0;
2010}
2011
c46ee386 2012struct pn533_data_exchange_arg {
c46ee386
AAJ		 2013 data_exchange_cb_t cb;
2014 void *cb_context;
2015};
2016
6ff73fd2
SO		 2017static struct sk_buff *pn533_build_response(struct pn533 *dev)
2018{
2019 struct sk_buff *skb, *tmp, *t;
2020 unsigned int skb_len = 0, tmp_len = 0;
2021
fcfafc76 2022 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2023
2024 if (skb_queue_empty(&dev->resp_q))
2025 return NULL;
2026
2027 if (skb_queue_len(&dev->resp_q) == 1) {
2028 skb = skb_dequeue(&dev->resp_q);
2029 goto out;
2030 }
2031
2032 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2033 skb_len += tmp->len;
2034
2035 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2036 __func__, skb_len);
2037
2038 skb = alloc_skb(skb_len, GFP_KERNEL);
2039 if (skb == NULL)
2040 goto out;
2041
2042 skb_put(skb, skb_len);
2043
2044 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2045 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2046 tmp_len += tmp->len;
2047 }
2048
2049out:
2050 skb_queue_purge(&dev->resp_q);
2051
2052 return skb;
2053}
2054
c46ee386 2055static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2056 struct sk_buff *resp)
c46ee386
AAJ		 2057{
2058 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2059 struct sk_buff *skb;
2060 int rc = 0;
2061 u8 status, ret, mi;
c46ee386
AAJ		 2062
2063 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2064
b1e666f5
WR		 2065 if (IS_ERR(resp)) {
2066 rc = PTR_ERR(resp);
2067 goto _error;
c46ee386
AAJ		 2068 }
2069
b1e666f5
WR		 2070 status = resp->data[0];
2071 ret = status & PN533_CMD_RET_MASK;
2072 mi = status & PN533_CMD_MI_MASK;
2073
2074 skb_pull(resp, sizeof(status));
c46ee386 2075
b1e666f5
WR		 2076 if (ret != PN533_CMD_RET_SUCCESS) {
2077 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2078 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2079 rc = -EIO;
c46ee386
AAJ		 2080 goto error;
2081 }
2082
b1e666f5 2083 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2084
b1e666f5
WR		 2085 if (mi) {
2086 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2087 queue_work(dev->wq, &dev->mi_work);
2088 return -EINPROGRESS;
c46ee386
AAJ		 2089 }
2090
6ff73fd2 2091 skb = pn533_build_response(dev);
b1e666f5 2092 if (!skb)
6ff73fd2 2093 goto error;
c46ee386 2094
6ff73fd2 2095 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2096 kfree(arg);
2097 return 0;
2098
2099error:
b1e666f5
WR		 2100 dev_kfree_skb(resp);
2101_error:
6ff73fd2 2102 skb_queue_purge(&dev->resp_q);
b1e666f5 2103 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2104 kfree(arg);
b1e666f5 2105 return rc;
c46ee386
AAJ		 2106}
2107
be9ae4ce
SO		 2108static int pn533_transceive(struct nfc_dev *nfc_dev,
2109 struct nfc_target *target, struct sk_buff *skb,
2110 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2111{
2112 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2113 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2114 int rc;
2115
2116 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2117
b1e666f5
WR		 2118 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2119 /* TODO: Implement support to multi-part data exchange */
2120 nfc_dev_err(&dev->interface->dev,
2121 "Data length greater than the max allowed: %d",
2122 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2123 rc = -ENOSYS;
2124 goto error;
2125 }
2126
c46ee386 2127 if (!dev->tgt_active_prot) {
6ca55372
WR		 2128 nfc_dev_err(&dev->interface->dev,
2129 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2130 rc = -EINVAL;
2131 goto error;
2132 }
2133
b1e666f5 2134 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2135 if (!arg) {
2136 rc = -ENOMEM;
b1e666f5 2137 goto error;
c46ee386
AAJ		 2138 }
2139
c46ee386
AAJ		 2140 arg->cb = cb;
2141 arg->cb_context = cb_context;
2142
b1e666f5
WR		 2143 switch (dev->device_type) {
2144 case PN533_DEVICE_PASORI:
2145 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2146 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2147 skb,
2148 pn533_data_exchange_complete,
2149 arg);
2150
2151 break;
2152 }
2153 default:
2154 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2155
2156 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2157 skb, pn533_data_exchange_complete,
2158 arg);
2159
2160 break;
c46ee386
AAJ		 2161 }
2162
b1e666f5
WR		 2163 if (rc < 0) /* rc from send_async */
2164 goto error;
2165
c46ee386
AAJ		 2166 return 0;
2167
c46ee386 2168error:
b1e666f5
WR		 2169 kfree(arg);
2170 dev_kfree_skb(skb);
c46ee386
AAJ		 2171 return rc;
2172}
2173
dadb06f2 2174static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2175 struct sk_buff *resp)
dadb06f2 2176{
e4878823 2177 u8 status;
5b412fd1 2178
dadb06f2
SO		 2179 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2180
e4878823
WR		 2181 if (IS_ERR(resp))
2182 return PTR_ERR(resp);
5b412fd1 2183
e4878823 2184 status = resp->data[0];
dadb06f2 2185
e4878823 2186 dev_kfree_skb(resp);
dadb06f2 2187
e4878823 2188 if (status != 0) {
dadb06f2
SO		 2189 nfc_tm_deactivated(dev->nfc_dev);
2190
51ad304c
SO		 2191 dev->tgt_mode = 0;
2192
dadb06f2
SO		 2193 return 0;
2194 }
2195
2196 queue_work(dev->wq, &dev->tg_work);
2197
2198 return 0;
2199}
2200
2201static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2202{
2203 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2204 int rc;
2205
2206 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2207
e4878823 2208 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2209 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2210 "Data length greater than the max allowed: %d",
2211 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2212 return -ENOSYS;
dadb06f2
SO		 2213 }
2214
e4878823
WR		 2215 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2216 pn533_tm_send_complete, NULL);
2217 if (rc < 0)
2218 dev_kfree_skb(skb);
dadb06f2
SO		 2219
2220 return rc;
2221}
2222
6ff73fd2
SO		 2223static void pn533_wq_mi_recv(struct work_struct *work)
2224{
2225 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2226
2227 struct sk_buff *skb;
6ff73fd2
SO		 2228 int rc;
2229
2230 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2231
9e2d493e 2232 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2233 if (!skb)
2234 goto error;
6ff73fd2 2235
b1e666f5
WR		 2236 switch (dev->device_type) {
2237 case PN533_DEVICE_PASORI:
2238 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2239 rc = pn533_send_cmd_direct_async(dev,
2240 PN533_CMD_IN_COMM_THRU,
2241 skb,
2242 pn533_data_exchange_complete,
2243 dev->cmd_complete_mi_arg);
6ff73fd2 2244
b1e666f5
WR		 2245 break;
2246 }
2247 default:
2248 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2249
b1e666f5
WR		 2250 rc = pn533_send_cmd_direct_async(dev,
2251 PN533_CMD_IN_DATA_EXCHANGE,
2252 skb,
2253 pn533_data_exchange_complete,
2254 dev->cmd_complete_mi_arg);
b1bb290a 2255
b1e666f5 2256 break;
6ff73fd2
SO		 2257 }
2258
b1e666f5 2259 if (rc == 0) /* success */
6ff73fd2
SO		 2260 return;
2261
b1e666f5
WR		 2262 nfc_dev_err(&dev->interface->dev,
2263 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2264
b1e666f5
WR		 2265 dev_kfree_skb(skb);
2266 kfree(dev->cmd_complete_arg);
6ff73fd2 2267
b1e666f5 2268error:
6ff73fd2 2269 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2270 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2271}
2272
c46ee386
AAJ		 2273static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2274 u8 cfgdata_len)
2275{
cb950d93
WR		 2276 struct sk_buff *skb;
2277 struct sk_buff *resp;
2278
2279 int skb_len;
c46ee386
AAJ		 2280
2281 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2282
cb950d93 2283 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2284
9e2d493e 2285 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2286 if (!skb)
2287 return -ENOMEM;
c46ee386 2288
cb950d93
WR		 2289 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2290 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2291
cb950d93
WR		 2292 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2293 if (IS_ERR(resp))
2294 return PTR_ERR(resp);
c46ee386 2295
cb950d93
WR		 2296 dev_kfree_skb(resp);
2297 return 0;
2298}
2299
2300static int pn533_get_firmware_version(struct pn533 *dev,
2301 struct pn533_fw_version *fv)
2302{
2303 struct sk_buff *skb;
2304 struct sk_buff *resp;
2305
9e2d493e 2306 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2307 if (!skb)
2308 return -ENOMEM;
2309
2310 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2311 if (IS_ERR(resp))
2312 return PTR_ERR(resp);
2313
2314 fv->ic = resp->data[0];
2315 fv->ver = resp->data[1];
2316 fv->rev = resp->data[2];
2317 fv->support = resp->data[3];
2318
2319 dev_kfree_skb(resp);
2320 return 0;
c46ee386
AAJ		 2321}
2322
f75c2913 2323static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2324{
cb950d93
WR		 2325 struct sk_buff *skb;
2326 struct sk_buff *resp;
5c7b0531
SO		 2327
2328 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2329
9e2d493e 2330 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2331 if (!skb)
2332 return -ENOMEM;
5c7b0531 2333
cb950d93 2334 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2335
cb950d93
WR		 2336 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2337 if (IS_ERR(resp))
2338 return PTR_ERR(resp);
5c7b0531 2339
cb950d93 2340 dev_kfree_skb(resp);
5c7b0531 2341
94c5c156 2342 return 0;
5c7b0531
SO		 2343}
2344
2345static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2346 .dev_up = NULL,
2347 .dev_down = NULL,
361f3cb7
SO		 2348 .dep_link_up = pn533_dep_link_up,
2349 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2350 .start_poll = pn533_start_poll,
2351 .stop_poll = pn533_stop_poll,
2352 .activate_target = pn533_activate_target,
2353 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2354 .im_transceive = pn533_transceive,
dadb06f2 2355 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2356};
2357
5c7b0531
SO		 2358static int pn533_setup(struct pn533 *dev)
2359{
2360 struct pn533_config_max_retries max_retries;
2361 struct pn533_config_timing timing;
2362 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2363 int rc;
2364
2365 switch (dev->device_type) {
2366 case PN533_DEVICE_STD:
2367 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2368 max_retries.mx_rty_psl = 2;
2369 max_retries.mx_rty_passive_act =
2370 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2371
2372 timing.rfu = PN533_CONFIG_TIMING_102;
2373 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2374 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2375
2376 break;
2377
2378 case PN533_DEVICE_PASORI:
2379 max_retries.mx_rty_atr = 0x2;
2380 max_retries.mx_rty_psl = 0x1;
2381 max_retries.mx_rty_passive_act =
2382 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2383
2384 timing.rfu = PN533_CONFIG_TIMING_102;
2385 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2386 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2387
2388 break;
2389
2390 default:
2391 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2392 dev->device_type);
2393 return -EINVAL;
2394 }
2395
2396 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2397 (u8 *)&max_retries, sizeof(max_retries));
2398 if (rc) {
2399 nfc_dev_err(&dev->interface->dev,
2400 "Error on setting MAX_RETRIES config");
2401 return rc;
2402 }
2403
2404
2405 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2406 (u8 *)&timing, sizeof(timing));
2407 if (rc) {
2408 nfc_dev_err(&dev->interface->dev,
2409 "Error on setting RF timings");
2410 return rc;
2411 }
2412
2413 switch (dev->device_type) {
2414 case PN533_DEVICE_STD:
2415 break;
2416
2417 case PN533_DEVICE_PASORI:
f75c2913 2418 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2419
2420 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2421 pasori_cfg, 3);
2422 if (rc) {
2423 nfc_dev_err(&dev->interface->dev,
2424 "Error while settings PASORI config");
2425 return rc;
2426 }
2427
f75c2913 2428 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2429
2430 break;
2431 }
2432
2433 return 0;
2434}
2435
c46ee386
AAJ		 2436static int pn533_probe(struct usb_interface *interface,
2437 const struct usb_device_id *id)
2438{
cb950d93 2439 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2440 struct pn533 *dev;
2441 struct usb_host_interface *iface_desc;
2442 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2443 int in_endpoint = 0;
2444 int out_endpoint = 0;
2445 int rc = -ENOMEM;
2446 int i;
2447 u32 protocols;
2448
2449 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2450 if (!dev)
2451 return -ENOMEM;
2452
2453 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2454 dev->interface = interface;
0201ed03 2455 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2456
2457 iface_desc = interface->cur_altsetting;
2458 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2459 endpoint = &iface_desc->endpoint[i].desc;
2460
8d25ca79 2461 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2462 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2463
8d25ca79 2464 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2465 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2466 }
2467
2468 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2469 nfc_dev_err(&interface->dev,
2470 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2471 rc = -ENODEV;
2472 goto error;
2473 }
2474
c46ee386 2475 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2476 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2477
a5798094 2478 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2479 goto error;
2480
2481 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2482 usb_rcvbulkpipe(dev->udev, in_endpoint),
2483 NULL, 0, NULL, dev);
c46ee386 2484 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2485 usb_sndbulkpipe(dev->udev, out_endpoint),
2486 NULL, 0, pn533_send_complete, dev);
c46ee386 2487
5d50b364
SO		 2488 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2489 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2490 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2491 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2492 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2493 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2494 if (dev->wq == NULL)
2495 goto error;
c46ee386 2496
6fbbdc16
SO		 2497 init_timer(&dev->listen_timer);
2498 dev->listen_timer.data = (unsigned long) dev;
2499 dev->listen_timer.function = pn533_listen_mode_timer;
2500
6ff73fd2
SO		 2501 skb_queue_head_init(&dev->resp_q);
2502
5d50b364
SO		 2503 INIT_LIST_HEAD(&dev->cmd_queue);
2504
c46ee386
AAJ		 2505 usb_set_intfdata(interface, dev);
2506
9e2d493e 2507 dev->ops = &pn533_std_frame_ops;
c46ee386 2508
5c7b0531
SO		 2509 dev->device_type = id->driver_info;
2510 switch (dev->device_type) {
2511 case PN533_DEVICE_STD:
2512 protocols = PN533_ALL_PROTOCOLS;
2513 break;
2514
2515 case PN533_DEVICE_PASORI:
2516 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2517 break;
2518
2519 default:
2520 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2521 dev->device_type);
2522 rc = -EINVAL;
2523 goto destroy_wq;
2524 }
c46ee386 2525
9e2d493e
WR		 2526 memset(&fw_ver, 0, sizeof(fw_ver));
2527 rc = pn533_get_firmware_version(dev, &fw_ver);
2528 if (rc < 0)
2529 goto destroy_wq;
2530
2531 nfc_dev_info(&dev->interface->dev,
2532 "NXP PN533 firmware ver %d.%d now attached",
2533 fw_ver.ver, fw_ver.rev);
2534
2535
e8753043 2536 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
390a1bd8 2537 NFC_SE_NONE,
9e2d493e 2538 dev->ops->tx_header_len +
e8753043 2539 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2540 dev->ops->tx_tail_len);
c46ee386 2541 if (!dev->nfc_dev)
4849f85e 2542 goto destroy_wq;
c46ee386
AAJ		 2543
2544 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2545 nfc_set_drvdata(dev->nfc_dev, dev);
2546
2547 rc = nfc_register_device(dev->nfc_dev);
2548 if (rc)
2549 goto free_nfc_dev;
2550
5c7b0531
SO		 2551 rc = pn533_setup(dev);
2552 if (rc)
34a85bfc 2553 goto unregister_nfc_dev;
34a85bfc 2554
c46ee386
AAJ		 2555 return 0;
2556
9f2f8ba1
SO		 2557unregister_nfc_dev:
2558 nfc_unregister_device(dev->nfc_dev);
2559
c46ee386
AAJ		 2560free_nfc_dev:
2561 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2562
4849f85e
SO		 2563destroy_wq:
2564 destroy_workqueue(dev->wq);
c46ee386 2565error:
c46ee386 2566 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2567 usb_free_urb(dev->out_urb);
2568 kfree(dev);
2569 return rc;
2570}
2571
2572static void pn533_disconnect(struct usb_interface *interface)
2573{
2574 struct pn533 *dev;
5d50b364 2575 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2576
2577 dev = usb_get_intfdata(interface);
2578 usb_set_intfdata(interface, NULL);
2579
2580 nfc_unregister_device(dev->nfc_dev);
2581 nfc_free_device(dev->nfc_dev);
2582
2583 usb_kill_urb(dev->in_urb);
2584 usb_kill_urb(dev->out_urb);
2585
4849f85e 2586 destroy_workqueue(dev->wq);
c46ee386 2587
6ff73fd2
SO		 2588 skb_queue_purge(&dev->resp_q);
2589
6fbbdc16
SO		 2590 del_timer(&dev->listen_timer);
2591
5d50b364
SO		 2592 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2593 list_del(&cmd->queue);
2594 kfree(cmd);
2595 }
2596
c46ee386 2597 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2598 usb_free_urb(dev->out_urb);
2599 kfree(dev);
2600
276556db 2601 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2602}
2603
2604static struct usb_driver pn533_driver = {
2605 .name = "pn533",
2606 .probe = pn533_probe,
2607 .disconnect = pn533_disconnect,
2608 .id_table = pn533_table,
2609};
2610
fe748483 2611module_usb_driver(pn533_driver);
c46ee386 2612
e70b96e9
WR		 2613MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2614MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2615MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2616MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2617MODULE_VERSION(VERSION);
2618MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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