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NFC: pn533: Avoid function declarations
[mirror_ubuntu-zesty-kernel.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 332
b1e666f5 333 void *cmd_complete_mi_arg;
0201ed03 334 struct mutex cmd_lock;
2c206fb7 335 struct pn533_cmd *cmd;
c46ee386
AAJ		 336
337 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
338 u8 poll_mod_count;
339 u8 poll_mod_curr;
340 u32 poll_protocols;
6fbbdc16
SO		 341 u32 listen_protocols;
342
343 u8 *gb;
344 size_t gb_len;
c46ee386
AAJ		 345
346 u8 tgt_available_prots;
347 u8 tgt_active_prot;
51ad304c 348 u8 tgt_mode;
5c7b0531
SO		 349
350 u32 device_type;
5d50b364
SO		 351
352 struct list_head cmd_queue;
353 u8 cmd_pending;
9e2d493e
WR		 354
355 struct pn533_frame_ops *ops;
5d50b364
SO		 356};
357
358struct pn533_cmd {
359 struct list_head queue;
4b2a9532 360 u8 code;
aada17ac
WR		 361 struct sk_buff *req;
362 struct sk_buff *resp;
9e2d493e 363 int resp_len;
4231604b
WR		 364 pn533_send_async_complete_t complete_cb;
365 void *complete_cb_context;
c46ee386
AAJ		 366};
367
63123108 368struct pn533_std_frame {
c46ee386
AAJ		 369 u8 preamble;
370 __be16 start_frame;
371 u8 datalen;
372 u8 datalen_checksum;
373 u8 data[];
374} __packed;
375
9e2d493e
WR		 376struct pn533_frame_ops {
377 void (*tx_frame_init)(void *frame, u8 cmd_code);
378 void (*tx_frame_finish)(void *frame);
379 void (*tx_update_payload_len)(void *frame, int len);
380 int tx_header_len;
381 int tx_tail_len;
382
383 bool (*rx_is_frame_valid)(void *frame);
384 int (*rx_frame_size)(void *frame);
385 int rx_header_len;
386 int rx_tail_len;
387
388 int max_payload_len;
389 u8 (*get_cmd_code)(void *frame);
390};
391
c46ee386 392/* The rule: value + checksum = 0 */
63123108 393static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 394{
395 return ~value + 1;
396}
397
398/* The rule: sum(data elements) + checksum = 0 */
63123108 399static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 400{
401 u8 sum = 0;
402 int i;
403
404 for (i = 0; i < datalen; i++)
405 sum += data[i];
406
63123108 407 return pn533_std_checksum(sum);
c46ee386
AAJ		 408}
409
63123108 410static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 411{
63123108 412 struct pn533_std_frame *frame = _frame;
9e2d493e 413
c46ee386 414 frame->preamble = 0;
63123108
WR		 415 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
416 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
417 PN533_STD_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 418 frame->datalen = 2;
419}
420
63123108 421static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 422{
63123108 423 struct pn533_std_frame *frame = _frame;
9e2d493e 424
63123108 425 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 426
63123108
WR		 427 PN533_STD_FRAME_CHECKSUM(frame) =
428 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 429
63123108 430 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 431}
432
63123108 433static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 434{
63123108 435 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 436
437 frame->datalen += len;
438}
439
63123108 440static bool pn533_std_rx_frame_is_valid(void *_frame)
c46ee386
AAJ		 441{
442 u8 checksum;
63123108 443 struct pn533_std_frame *frame = _frame;
c46ee386 444
63123108 445 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 446 return false;
447
63123108 448 checksum = pn533_std_checksum(frame->datalen);
c46ee386
AAJ		 449 if (checksum != frame->datalen_checksum)
450 return false;
451
63123108
WR		 452 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
453 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
c46ee386
AAJ		 454 return false;
455
456 return true;
457}
458
63123108 459static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 460{
63123108 461 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 462 return false;
463
464 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
465 return false;
466
467 return true;
468}
469
63123108 470static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 471{
63123108 472 struct pn533_std_frame *f = frame;
9e2d493e 473
63123108
WR		 474 return sizeof(struct pn533_std_frame) + f->datalen +
475 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 476}
477
63123108 478static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 479{
63123108 480 struct pn533_std_frame *f = frame;
9e2d493e 481
63123108 482 return PN533_STD_FRAME_CMD(f);
9e2d493e
WR		 483}
484
ef3d56e1 485static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 486 .tx_frame_init = pn533_std_tx_frame_init,
487 .tx_frame_finish = pn533_std_tx_frame_finish,
488 .tx_update_payload_len = pn533_std_tx_update_payload_len,
489 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
490 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
491
492 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
493 .rx_frame_size = pn533_std_rx_frame_size,
494 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
495 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
496
497 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
498 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 499};
500
501static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 502{
2c206fb7 503 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 504 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 505}
506
c46ee386
AAJ		 507static void pn533_recv_response(struct urb *urb)
508{
509 struct pn533 *dev = urb->context;
9e2d493e 510 u8 *in_frame;
c46ee386 511
c46ee386
AAJ		 512 switch (urb->status) {
513 case 0:
f8f99171 514 break; /* success */
c46ee386
AAJ		 515 case -ECONNRESET:
516 case -ENOENT:
6ca55372 517 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 518 "The urb has been canceled (status %d)",
519 urb->status);
4849f85e
SO		 520 dev->wq_in_error = urb->status;
521 goto sched_wq;
f8f99171 522 case -ESHUTDOWN:
c46ee386 523 default:
6ca55372 524 nfc_dev_err(&dev->interface->dev,
f8f99171 525 "Urb failure (status %d)", urb->status);
4849f85e
SO		 526 dev->wq_in_error = urb->status;
527 goto sched_wq;
c46ee386
AAJ		 528 }
529
530 in_frame = dev->in_urb->transfer_buffer;
531
fcfafc76 532 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
e279f84f
SO		 533 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
534 dev->ops->rx_frame_size(in_frame), false);
99e591be 535
9e2d493e 536 if (!dev->ops->rx_is_frame_valid(in_frame)) {
c46ee386 537 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
4849f85e
SO		 538 dev->wq_in_error = -EIO;
539 goto sched_wq;
c46ee386
AAJ		 540 }
541
9e2d493e 542 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 543 nfc_dev_err(&dev->interface->dev,
544 "It it not the response to the last command");
4849f85e
SO		 545 dev->wq_in_error = -EIO;
546 goto sched_wq;
c46ee386
AAJ		 547 }
548
4849f85e 549 dev->wq_in_error = 0;
c46ee386 550
4849f85e 551sched_wq:
5d50b364 552 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 553}
554
555static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
556{
557 dev->in_urb->complete = pn533_recv_response;
558
559 return usb_submit_urb(dev->in_urb, flags);
560}
561
562static void pn533_recv_ack(struct urb *urb)
563{
564 struct pn533 *dev = urb->context;
63123108 565 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 566 int rc;
567
568 switch (urb->status) {
569 case 0:
f8f99171 570 break; /* success */
c46ee386
AAJ		 571 case -ECONNRESET:
572 case -ENOENT:
6ca55372 573 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 574 "The urb has been stopped (status %d)",
575 urb->status);
4849f85e
SO		 576 dev->wq_in_error = urb->status;
577 goto sched_wq;
f8f99171 578 case -ESHUTDOWN:
c46ee386 579 default:
6ca55372 580 nfc_dev_err(&dev->interface->dev,
f8f99171 581 "Urb failure (status %d)", urb->status);
4849f85e
SO		 582 dev->wq_in_error = urb->status;
583 goto sched_wq;
c46ee386
AAJ		 584 }
585
586 in_frame = dev->in_urb->transfer_buffer;
587
63123108 588 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 589 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
4849f85e
SO		 590 dev->wq_in_error = -EIO;
591 goto sched_wq;
c46ee386
AAJ		 592 }
593
c46ee386
AAJ		 594 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
595 if (rc) {
6ca55372
WR		 596 nfc_dev_err(&dev->interface->dev,
597 "usb_submit_urb failed with result %d", rc);
4849f85e
SO		 598 dev->wq_in_error = rc;
599 goto sched_wq;
c46ee386
AAJ		 600 }
601
602 return;
603
4849f85e 604sched_wq:
5d50b364 605 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 606}
607
608static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
609{
610 dev->in_urb->complete = pn533_recv_ack;
611
612 return usb_submit_urb(dev->in_urb, flags);
613}
614
615static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
616{
63123108 617 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 618 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 619 int rc;
620
621 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
622
5b5a4437
WR		 623 dev->out_urb->transfer_buffer = ack;
624 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 625 rc = usb_submit_urb(dev->out_urb, flags);
626
627 return rc;
628}
629
e8f40531
WR		 630static int __pn533_send_frame_async(struct pn533 *dev,
631 struct sk_buff *out,
632 struct sk_buff *in,
ddf19d20 633 int in_len)
c46ee386
AAJ		 634{
635 int rc;
636
e8f40531
WR		 637 dev->out_urb->transfer_buffer = out->data;
638 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 639
e8f40531
WR		 640 dev->in_urb->transfer_buffer = in->data;
641 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 642
e279f84f
SO		 643 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
644 out->data, out->len, false);
99e591be 645
d94ea4f5 646 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 647 if (rc)
648 return rc;
649
d94ea4f5 650 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
c46ee386
AAJ		 651 if (rc)
652 goto error;
653
654 return 0;
655
656error:
657 usb_unlink_urb(dev->out_urb);
658 return rc;
659}
660
9e2d493e
WR		 661static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
662 struct sk_buff *skb)
aada17ac 663{
aada17ac
WR		 664 /* payload is already there, just update datalen */
665 int payload_len = skb->len;
9e2d493e 666 struct pn533_frame_ops *ops = dev->ops;
aada17ac 667
aada17ac 668
9e2d493e
WR		 669 skb_push(skb, ops->tx_header_len);
670 skb_put(skb, ops->tx_tail_len);
aada17ac 671
9e2d493e
WR		 672 ops->tx_frame_init(skb->data, cmd_code);
673 ops->tx_update_payload_len(skb->data, payload_len);
674 ops->tx_frame_finish(skb->data);
aada17ac
WR		 675}
676
ddf19d20 677static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 678{
ddf19d20
WR		 679 struct pn533_cmd *cmd = dev->cmd;
680 int status = dev->wq_in_error;
aada17ac 681
4231604b
WR		 682 struct sk_buff *req = cmd->req;
683 struct sk_buff *resp = cmd->resp;
aada17ac 684
aada17ac
WR		 685 int rc;
686
687 dev_kfree_skb(req);
688
0c33d262 689 if (status < 0) {
4231604b
WR		 690 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
691 ERR_PTR(status));
aada17ac 692 dev_kfree_skb(resp);
2c206fb7 693 goto done;
aada17ac
WR		 694 }
695
9e2d493e
WR		 696 skb_put(resp, dev->ops->rx_frame_size(resp->data));
697 skb_pull(resp, dev->ops->rx_header_len);
698 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 699
4231604b 700 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 701
2c206fb7 702done:
4231604b 703 kfree(cmd);
2c206fb7 704 dev->cmd = NULL;
aada17ac
WR		 705 return rc;
706}
707
708static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
709 struct sk_buff *req, struct sk_buff *resp,
710 int resp_len,
711 pn533_send_async_complete_t complete_cb,
712 void *complete_cb_context)
713{
714 struct pn533_cmd *cmd;
aada17ac
WR		 715 int rc = 0;
716
fcfafc76 717 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 718
4231604b
WR		 719 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
720 if (!cmd)
aada17ac
WR		 721 return -ENOMEM;
722
4b2a9532 723 cmd->code = cmd_code;
4231604b
WR		 724 cmd->req = req;
725 cmd->resp = resp;
726 cmd->resp_len = resp_len;
727 cmd->complete_cb = complete_cb;
728 cmd->complete_cb_context = complete_cb_context;
aada17ac 729
9e2d493e 730 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 731
732 mutex_lock(&dev->cmd_lock);
733
734 if (!dev->cmd_pending) {
ddf19d20 735 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 736 if (rc)
737 goto error;
738
739 dev->cmd_pending = 1;
2c206fb7 740 dev->cmd = cmd;
aada17ac
WR		 741 goto unlock;
742 }
743
fcfafc76
WR		 744 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
745 cmd_code);
aada17ac 746
aada17ac 747 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 748 list_add_tail(&cmd->queue, &dev->cmd_queue);
749
750 goto unlock;
751
752error:
4231604b 753 kfree(cmd);
aada17ac
WR		 754unlock:
755 mutex_unlock(&dev->cmd_lock);
756 return rc;
15461aeb
WR		 757}
758
759static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
760 struct sk_buff *req,
761 pn533_send_async_complete_t complete_cb,
762 void *complete_cb_context)
763{
764 struct sk_buff *resp;
765 int rc;
9e2d493e
WR		 766 int resp_len = dev->ops->rx_header_len +
767 dev->ops->max_payload_len +
768 dev->ops->rx_tail_len;
15461aeb 769
15461aeb
WR		 770 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
771 if (!resp)
772 return -ENOMEM;
773
774 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
775 complete_cb_context);
776 if (rc)
777 dev_kfree_skb(resp);
778
779 return rc;
aada17ac
WR		 780}
781
782static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
783 struct sk_buff *req,
784 pn533_send_async_complete_t complete_cb,
785 void *complete_cb_context)
786{
787 struct sk_buff *resp;
788 int rc;
9e2d493e
WR		 789 int resp_len = dev->ops->rx_header_len +
790 dev->ops->max_payload_len +
791 dev->ops->rx_tail_len;
aada17ac 792
9e2d493e 793 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 794 if (!resp)
795 return -ENOMEM;
796
9e2d493e
WR		 797 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
798 complete_cb_context);
aada17ac
WR		 799 if (rc)
800 dev_kfree_skb(resp);
801
802 return rc;
803}
804
b1e666f5
WR		 805/*
806 * pn533_send_cmd_direct_async
807 *
808 * The function sends a piority cmd directly to the chip omiting the cmd
809 * queue. It's intended to be used by chaining mechanism of received responses
810 * where the host has to request every single chunk of data before scheduling
811 * next cmd from the queue.
812 */
813static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
814 struct sk_buff *req,
815 pn533_send_async_complete_t complete_cb,
816 void *complete_cb_context)
817{
b1e666f5 818 struct sk_buff *resp;
4231604b 819 struct pn533_cmd *cmd;
b1e666f5 820 int rc;
9e2d493e
WR		 821 int resp_len = dev->ops->rx_header_len +
822 dev->ops->max_payload_len +
823 dev->ops->rx_tail_len;
b1e666f5 824
b1e666f5
WR		 825 resp = alloc_skb(resp_len, GFP_KERNEL);
826 if (!resp)
827 return -ENOMEM;
828
4231604b
WR		 829 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
830 if (!cmd) {
b1e666f5
WR		 831 dev_kfree_skb(resp);
832 return -ENOMEM;
833 }
834
4b2a9532 835 cmd->code = cmd_code;
4231604b
WR		 836 cmd->req = req;
837 cmd->resp = resp;
838 cmd->resp_len = resp_len;
839 cmd->complete_cb = complete_cb;
840 cmd->complete_cb_context = complete_cb_context;
b1e666f5 841
9e2d493e 842 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 843
ddf19d20 844 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 845 if (rc < 0) {
846 dev_kfree_skb(resp);
4231604b 847 kfree(cmd);
2c206fb7
WR		 848 } else {
849 dev->cmd = cmd;
b1e666f5
WR		 850 }
851
852 return rc;
853}
854
c79490e1
WR		 855static void pn533_wq_cmd_complete(struct work_struct *work)
856{
857 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
858 int rc;
859
860 rc = pn533_send_async_complete(dev);
861 if (rc != -EINPROGRESS)
862 queue_work(dev->wq, &dev->cmd_work);
863}
864
5d50b364
SO		 865static void pn533_wq_cmd(struct work_struct *work)
866{
867 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
868 struct pn533_cmd *cmd;
0ce1fbdd 869 int rc;
5d50b364
SO		 870
871 mutex_lock(&dev->cmd_lock);
872
873 if (list_empty(&dev->cmd_queue)) {
874 dev->cmd_pending = 0;
875 mutex_unlock(&dev->cmd_lock);
876 return;
877 }
878
879 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
880
60ad07ab
SJ		 881 list_del(&cmd->queue);
882
5d50b364
SO		 883 mutex_unlock(&dev->cmd_lock);
884
ddf19d20 885 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 886 if (rc < 0) {
887 dev_kfree_skb(cmd->req);
888 dev_kfree_skb(cmd->resp);
4231604b 889 kfree(cmd);
2c206fb7 890 return;
0ce1fbdd 891 }
2c206fb7
WR		 892
893 dev->cmd = cmd;
5d50b364
SO		 894}
895
c46ee386 896struct pn533_sync_cmd_response {
94c5c156 897 struct sk_buff *resp;
c46ee386
AAJ		 898 struct completion done;
899};
900
94c5c156
WR		 901static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
902 struct sk_buff *resp)
903{
904 struct pn533_sync_cmd_response *arg = _arg;
905
94c5c156
WR		 906 arg->resp = resp;
907 complete(&arg->done);
908
909 return 0;
910}
911
912/* pn533_send_cmd_sync
913 *
914 * Please note the req parameter is freed inside the function to
915 * limit a number of return value interpretations by the caller.
916 *
917 * 1. negative in case of error during TX path -> req should be freed
918 *
919 * 2. negative in case of error during RX path -> req should not be freed
920 * as it's been already freed at the begining of RX path by
921 * async_complete_cb.
922 *
923 * 3. valid pointer in case of succesfult RX path
924 *
925 * A caller has to check a return value with IS_ERR macro. If the test pass,
926 * the returned pointer is valid.
927 *
928 * */
929static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
930 struct sk_buff *req)
931{
932 int rc;
933 struct pn533_sync_cmd_response arg;
934
94c5c156
WR		 935 init_completion(&arg.done);
936
937 rc = pn533_send_cmd_async(dev, cmd_code, req,
938 pn533_send_sync_complete, &arg);
939 if (rc) {
940 dev_kfree_skb(req);
941 return ERR_PTR(rc);
942 }
943
944 wait_for_completion(&arg.done);
945
946 return arg.resp;
947}
948
c46ee386
AAJ		 949static void pn533_send_complete(struct urb *urb)
950{
951 struct pn533 *dev = urb->context;
952
c46ee386
AAJ		 953 switch (urb->status) {
954 case 0:
f8f99171 955 break; /* success */
c46ee386
AAJ		 956 case -ECONNRESET:
957 case -ENOENT:
6ca55372 958 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 959 "The urb has been stopped (status %d)",
960 urb->status);
c46ee386 961 break;
f8f99171 962 case -ESHUTDOWN:
c46ee386 963 default:
f8f99171
WR		 964 nfc_dev_err(&dev->interface->dev,
965 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 966 }
967}
968
9e2d493e 969static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 970{
971 struct sk_buff *skb;
972
9e2d493e 973 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 974 size +
9e2d493e 975 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 976
977 if (skb)
9e2d493e 978 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 979
980 return skb;
981}
982
c46ee386
AAJ		 983struct pn533_target_type_a {
984 __be16 sens_res;
985 u8 sel_res;
986 u8 nfcid_len;
987 u8 nfcid_data[];
988} __packed;
989
990
991#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
992#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
993#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
994
995#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
996#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
997
998#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
999#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1000
1001#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1002#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1003#define PN533_TYPE_A_SEL_PROT_DEP 2
1004#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1005
1006static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1007 int target_data_len)
1008{
1009 u8 ssd;
1010 u8 platconf;
1011
1012 if (target_data_len < sizeof(struct pn533_target_type_a))
1013 return false;
1014
1015 /* The lenght check of nfcid[] and ats[] are not being performed because
1016 the values are not being used */
1017
1018 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1019 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1020 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1021
1022 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1023 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1024 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1025 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1026 return false;
1027
1028 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1029 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1030 return false;
1031
1032 return true;
1033}
1034
1035static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1036 int tgt_data_len)
1037{
1038 struct pn533_target_type_a *tgt_type_a;
1039
37cf4fc6 1040 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1041
1042 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1043 return -EPROTO;
1044
1045 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1046 case PN533_TYPE_A_SEL_PROT_MIFARE:
1047 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1048 break;
1049 case PN533_TYPE_A_SEL_PROT_ISO14443:
1050 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1051 break;
1052 case PN533_TYPE_A_SEL_PROT_DEP:
1053 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1054 break;
1055 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1056 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1057 NFC_PROTO_NFC_DEP_MASK;
1058 break;
1059 }
1060
1061 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1062 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1063 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1064 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1065
1066 return 0;
1067}
1068
1069struct pn533_target_felica {
1070 u8 pol_res;
1071 u8 opcode;
1072 u8 nfcid2[8];
1073 u8 pad[8];
1074 /* optional */
1075 u8 syst_code[];
1076} __packed;
1077
1078#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1079#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1080
1081static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1082 int target_data_len)
1083{
1084 if (target_data_len < sizeof(struct pn533_target_felica))
1085 return false;
1086
1087 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1088 return false;
1089
1090 return true;
1091}
1092
1093static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1094 int tgt_data_len)
1095{
1096 struct pn533_target_felica *tgt_felica;
1097
37cf4fc6 1098 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1099
1100 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1101 return -EPROTO;
1102
5d467742
WR		 1103 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1104 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1105 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1106 else
1107 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1108
7975754f
SO		 1109 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1110 nfc_tgt->sensf_res_len = 9;
1111
c46ee386
AAJ		 1112 return 0;
1113}
1114
1115struct pn533_target_jewel {
1116 __be16 sens_res;
1117 u8 jewelid[4];
1118} __packed;
1119
1120static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1121 int target_data_len)
1122{
1123 u8 ssd;
1124 u8 platconf;
1125
1126 if (target_data_len < sizeof(struct pn533_target_jewel))
1127 return false;
1128
1129 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1130 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1131 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1132
1133 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1134 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1135 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1136 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1137 return false;
1138
1139 return true;
1140}
1141
1142static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1143 int tgt_data_len)
1144{
1145 struct pn533_target_jewel *tgt_jewel;
1146
37cf4fc6 1147 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1148
1149 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1150 return -EPROTO;
1151
1152 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1153 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1154 nfc_tgt->nfcid1_len = 4;
1155 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1156
1157 return 0;
1158}
1159
1160struct pn533_type_b_prot_info {
1161 u8 bitrate;
1162 u8 fsci_type;
1163 u8 fwi_adc_fo;
1164} __packed;
1165
1166#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1167#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1168#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1169
1170struct pn533_type_b_sens_res {
1171 u8 opcode;
1172 u8 nfcid[4];
1173 u8 appdata[4];
1174 struct pn533_type_b_prot_info prot_info;
1175} __packed;
1176
1177#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1178
1179struct pn533_target_type_b {
1180 struct pn533_type_b_sens_res sensb_res;
1181 u8 attrib_res_len;
1182 u8 attrib_res[];
1183} __packed;
1184
1185static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1186 int target_data_len)
1187{
1188 if (target_data_len < sizeof(struct pn533_target_type_b))
1189 return false;
1190
1191 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1192 return false;
1193
1194 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1195 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1196 return false;
1197
1198 return true;
1199}
1200
1201static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1202 int tgt_data_len)
1203{
1204 struct pn533_target_type_b *tgt_type_b;
1205
37cf4fc6 1206 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1207
1208 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1209 return -EPROTO;
1210
01d719a2 1211 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1212
1213 return 0;
1214}
1215
b5193e5d
WR		 1216static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1217 int tgdata_len)
c46ee386 1218{
c46ee386
AAJ		 1219 struct nfc_target nfc_tgt;
1220 int rc;
1221
1222 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1223 dev->poll_mod_curr);
c46ee386 1224
b5193e5d 1225 if (tg != 1)
c46ee386
AAJ		 1226 return -EPROTO;
1227
98b3ac1b
SO		 1228 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1229
c46ee386
AAJ		 1230 switch (dev->poll_mod_curr) {
1231 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1232 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1233 break;
1234 case PN533_POLL_MOD_212KBPS_FELICA:
1235 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1236 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1237 break;
1238 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1239 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1240 break;
1241 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1242 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1243 break;
1244 default:
b5193e5d
WR		 1245 nfc_dev_err(&dev->interface->dev,
1246 "Unknown current poll modulation");
c46ee386
AAJ		 1247 return -EPROTO;
1248 }
1249
1250 if (rc)
1251 return rc;
1252
1253 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1254 nfc_dev_dbg(&dev->interface->dev,
1255 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1256 return -EAGAIN;
1257 }
1258
b5193e5d
WR		 1259 nfc_dev_dbg(&dev->interface->dev,
1260 "Target found - supported protocols: 0x%x",
1261 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1262
1263 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1264
1265 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1266
1267 return 0;
1268}
1269
6fbbdc16
SO		 1270static inline void pn533_poll_next_mod(struct pn533 *dev)
1271{
1272 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1273}
1274
c46ee386
AAJ		 1275static void pn533_poll_reset_mod_list(struct pn533 *dev)
1276{
1277 dev->poll_mod_count = 0;
1278}
1279
1280static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1281{
1282 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1283 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1284 dev->poll_mod_count++;
1285}
1286
6fbbdc16
SO		 1287static void pn533_poll_create_mod_list(struct pn533 *dev,
1288 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1289{
1290 pn533_poll_reset_mod_list(dev);
1291
b08e8603
WR		 1292 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1293 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1294 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1295 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1296
b08e8603
WR		 1297 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1298 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1299 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1300 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1301 }
1302
6fbbdc16 1303 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1304 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1305
01d719a2 1306 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1307 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1308
6fbbdc16
SO		 1309 if (tm_protocols)
1310 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1311}
1312
b5193e5d 1313static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1314{
b5193e5d
WR		 1315 u8 nbtg, tg, *tgdata;
1316 int rc, tgdata_len;
c46ee386
AAJ		 1317
1318 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1319
b5193e5d
WR		 1320 nbtg = resp->data[0];
1321 tg = resp->data[1];
1322 tgdata = &resp->data[2];
1323 tgdata_len = resp->len - 2; /* nbtg + tg */
1324
1325 if (nbtg) {
1326 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1327
1328 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1329 if (rc == 0) {
1330 pn533_poll_reset_mod_list(dev);
1331 return 0;
1332 }
c46ee386
AAJ		 1333 }
1334
6fbbdc16 1335 return -EAGAIN;
c46ee386
AAJ		 1336}
1337
9e2d493e 1338static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1339{
b5193e5d
WR		 1340 struct sk_buff *skb;
1341 u8 *felica, *nfcid3, *gb;
1342
9e2d493e
WR		 1343 u8 *gbytes = dev->gb;
1344 size_t gbytes_len = dev->gb_len;
1345
51d9e803
SO		 1346 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1347 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1348 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1349 0xff, 0xff}; /* System code */
b5193e5d 1350
51d9e803
SO		 1351 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1352 0x0, 0x0, 0x0,
1353 0x40}; /* SEL_RES for DEP */
ad3823ce 1354
b5193e5d
WR		 1355 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1356 felica (18), nfcid3 (10), gb_len (1) */
1357 gbytes_len +
1358 1; /* len Tk*/
ad3823ce 1359
9e2d493e 1360 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1361 if (!skb)
1362 return NULL;
ad3823ce
SO		 1363
1364 /* DEP support only */
52f2eaee 1365 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1366
1367 /* MIFARE params */
1368 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1369
1370 /* Felica params */
b5193e5d
WR		 1371 felica = skb_put(skb, 18);
1372 memcpy(felica, felica_params, 18);
1373 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1374
1375 /* NFCID3 */
b5193e5d
WR		 1376 nfcid3 = skb_put(skb, 10);
1377 memset(nfcid3, 0, 10);
1378 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1379
1380 /* General bytes */
b5193e5d 1381 *skb_put(skb, 1) = gbytes_len;
51d9e803 1382
b5193e5d
WR		 1383 gb = skb_put(skb, gbytes_len);
1384 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1385
b5193e5d
WR		 1386 /* Len Tk */
1387 *skb_put(skb, 1) = 0;
51d9e803 1388
b5193e5d 1389 return skb;
ad3823ce
SO		 1390}
1391
b1bb290a 1392#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1393#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1394static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1395 struct sk_buff *resp)
103b34cf 1396{
e4878823 1397 u8 status;
103b34cf
SO		 1398
1399 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1400
e4878823
WR		 1401 if (IS_ERR(resp))
1402 return PTR_ERR(resp);
103b34cf 1403
e4878823
WR		 1404 status = resp->data[0];
1405 skb_pull(resp, sizeof(status));
103b34cf 1406
e4878823 1407 if (status != 0) {
103b34cf 1408 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1409 dev->tgt_mode = 0;
e4878823 1410 dev_kfree_skb(resp);
103b34cf
SO		 1411 return 0;
1412 }
1413
e4878823 1414 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1415}
1416
1417static void pn533_wq_tg_get_data(struct work_struct *work)
1418{
1419 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1420
e4878823
WR		 1421 struct sk_buff *skb;
1422 int rc;
103b34cf 1423
e4878823 1424 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1425
9e2d493e 1426 skb = pn533_alloc_skb(dev, 0);
e4878823 1427 if (!skb)
103b34cf
SO		 1428 return;
1429
e4878823
WR		 1430 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1431 pn533_tm_get_data_complete, NULL);
103b34cf 1432
e4878823
WR		 1433 if (rc < 0)
1434 dev_kfree_skb(skb);
103b34cf
SO		 1435
1436 return;
1437}
1438
fc40a8c1 1439#define ATR_REQ_GB_OFFSET 17
b5193e5d 1440static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1441{
b5193e5d 1442 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1443 size_t gb_len;
103b34cf 1444 int rc;
ad3823ce
SO		 1445
1446 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1447
b5193e5d 1448 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1449 return -EINVAL;
1450
b5193e5d
WR		 1451 mode = resp->data[0];
1452 cmd = &resp->data[1];
ad3823ce 1453
b5193e5d
WR		 1454 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1455 mode, resp->len);
ad3823ce 1456
b5193e5d
WR		 1457 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1458 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1459 comm_mode = NFC_COMM_ACTIVE;
1460
b5193e5d 1461 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1462 return -EOPNOTSUPP;
1463
b5193e5d
WR		 1464 gb = cmd + ATR_REQ_GB_OFFSET;
1465 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1466
103b34cf
SO		 1467 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1468 comm_mode, gb, gb_len);
1469 if (rc < 0) {
1470 nfc_dev_err(&dev->interface->dev,
1471 "Error when signaling target activation");
1472 return rc;
1473 }
1474
51ad304c 1475 dev->tgt_mode = 1;
103b34cf
SO		 1476 queue_work(dev->wq, &dev->tg_work);
1477
1478 return 0;
fe7c5800
SO		 1479}
1480
6fbbdc16 1481static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1482{
37cf4fc6 1483 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1484
1485 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1486
1487 /* An ack will cancel the last issued command (poll) */
1488 pn533_send_ack(dev, GFP_ATOMIC);
1489
1490 dev->cancel_listen = 1;
1491
6fbbdc16
SO		 1492 pn533_poll_next_mod(dev);
1493
1494 queue_work(dev->wq, &dev->poll_work);
1495}
1496
1497static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1498 struct sk_buff *resp)
6fbbdc16
SO		 1499{
1500 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1501 int rc;
1502
6fbbdc16 1503 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1504
b5193e5d
WR		 1505 if (IS_ERR(resp)) {
1506 rc = PTR_ERR(resp);
1507
1508 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1509 __func__, rc);
1510
1511 if (rc == -ENOENT) {
1512 if (dev->poll_mod_count != 0)
1513 return rc;
1514 else
1515 goto stop_poll;
1516 } else if (rc < 0) {
1517 nfc_dev_err(&dev->interface->dev,
1518 "Error %d when running poll", rc);
1519 goto stop_poll;
1520 }
6fbbdc16 1521 }
ad3823ce 1522
6fbbdc16
SO		 1523 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1524
b5193e5d 1525 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1526 del_timer(&dev->listen_timer);
b5193e5d
WR		 1527 rc = pn533_init_target_complete(dev, resp);
1528 goto done;
6fbbdc16
SO		 1529 }
1530
b5193e5d
WR		 1531 /* Initiator mode */
1532 rc = pn533_start_poll_complete(dev, resp);
1533 if (!rc)
1534 goto done;
6fbbdc16 1535
95cb9e10
WR		 1536 if (!dev->poll_mod_count) {
1537 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1538 goto done;
1539 }
1540
b5193e5d 1541 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1542 queue_work(dev->wq, &dev->poll_work);
1543
b5193e5d
WR		 1544done:
1545 dev_kfree_skb(resp);
1546 return rc;
6fbbdc16
SO		 1547
1548stop_poll:
b5193e5d
WR		 1549 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1550
6fbbdc16
SO		 1551 pn533_poll_reset_mod_list(dev);
1552 dev->poll_protocols = 0;
b5193e5d 1553 return rc;
ad3823ce
SO		 1554}
1555
9e2d493e
WR		 1556static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1557 struct pn533_poll_modulations *mod)
c46ee386 1558{
b5193e5d 1559 struct sk_buff *skb;
c46ee386 1560
9e2d493e 1561 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1562 if (!skb)
1563 return NULL;
c46ee386 1564
b5193e5d 1565 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1566
b5193e5d 1567 return skb;
6fbbdc16 1568}
c46ee386 1569
6fbbdc16
SO		 1570static int pn533_send_poll_frame(struct pn533 *dev)
1571{
b5193e5d
WR		 1572 struct pn533_poll_modulations *mod;
1573 struct sk_buff *skb;
6fbbdc16 1574 int rc;
b5193e5d 1575 u8 cmd_code;
c46ee386 1576
b5193e5d 1577 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1578
b5193e5d
WR		 1579 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1580 __func__, mod->len);
c46ee386 1581
b5193e5d
WR		 1582 if (mod->len == 0) { /* Listen mode */
1583 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1584 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1585 } else { /* Polling mode */
1586 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1587 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1588 }
1589
1590 if (!skb) {
1591 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1592 return -ENOMEM;
1593 }
1594
1595 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1596 NULL);
1597 if (rc < 0) {
1598 dev_kfree_skb(skb);
6fbbdc16 1599 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1600 }
c46ee386 1601
6fbbdc16
SO		 1602 return rc;
1603}
1604
1605static void pn533_wq_poll(struct work_struct *work)
1606{
1607 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1608 struct pn533_poll_modulations *cur_mod;
1609 int rc;
1610
1611 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1612
1613 nfc_dev_dbg(&dev->interface->dev,
1614 "%s cancel_listen %d modulation len %d",
1615 __func__, dev->cancel_listen, cur_mod->len);
1616
1617 if (dev->cancel_listen == 1) {
1618 dev->cancel_listen = 0;
1619 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1620 }
1621
6fbbdc16
SO		 1622 rc = pn533_send_poll_frame(dev);
1623 if (rc)
1624 return;
c46ee386 1625
6fbbdc16
SO		 1626 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1627 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1628
6fbbdc16 1629 return;
c46ee386
AAJ		 1630}
1631
fe7c5800
SO		 1632static int pn533_start_poll(struct nfc_dev *nfc_dev,
1633 u32 im_protocols, u32 tm_protocols)
1634{
1635 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1636
1637 nfc_dev_dbg(&dev->interface->dev,
1638 "%s: im protocols 0x%x tm protocols 0x%x",
1639 __func__, im_protocols, tm_protocols);
1640
1641 if (dev->tgt_active_prot) {
1642 nfc_dev_err(&dev->interface->dev,
1643 "Cannot poll with a target already activated");
1644 return -EBUSY;
1645 }
1646
51ad304c
SO		 1647 if (dev->tgt_mode) {
1648 nfc_dev_err(&dev->interface->dev,
1649 "Cannot poll while already being activated");
1650 return -EBUSY;
1651 }
1652
6fbbdc16
SO		 1653 if (tm_protocols) {
1654 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1655 if (dev->gb == NULL)
1656 tm_protocols = 0;
1657 }
ad3823ce 1658
6fbbdc16
SO		 1659 dev->poll_mod_curr = 0;
1660 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1661 dev->poll_protocols = im_protocols;
1662 dev->listen_protocols = tm_protocols;
ad3823ce 1663
6fbbdc16 1664 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1665}
1666
c46ee386
AAJ		 1667static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1668{
1669 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1670
1671 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1672
6fbbdc16
SO		 1673 del_timer(&dev->listen_timer);
1674
c46ee386 1675 if (!dev->poll_mod_count) {
6ca55372
WR		 1676 nfc_dev_dbg(&dev->interface->dev,
1677 "Polling operation was not running");
c46ee386
AAJ		 1678 return;
1679 }
1680
1681 /* An ack will cancel the last issued command (poll) */
1682 pn533_send_ack(dev, GFP_KERNEL);
1683
1684 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1685 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1686
1687 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1688}
1689
1690static int pn533_activate_target_nfcdep(struct pn533 *dev)
1691{
cb950d93 1692 struct pn533_cmd_activate_response *rsp;
541d920b 1693 u16 gt_len;
c46ee386
AAJ		 1694 int rc;
1695
cb950d93
WR		 1696 struct sk_buff *skb;
1697 struct sk_buff *resp;
c46ee386 1698
cb950d93 1699 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1700
9e2d493e 1701 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1702 if (!skb)
1703 return -ENOMEM;
c46ee386 1704
cb950d93
WR		 1705 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1706 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1707
cb950d93
WR		 1708 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1709 if (IS_ERR(resp))
1710 return PTR_ERR(resp);
c46ee386 1711
37cf4fc6 1712 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1713 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1714 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1715 nfc_dev_err(&dev->interface->dev,
1716 "Target activation failed (error 0x%x)", rc);
cb950d93 1717 dev_kfree_skb(resp);
c46ee386 1718 return -EIO;
8a0ecfe7 1719 }
c46ee386 1720
541d920b 1721 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1722 gt_len = resp->len - 16;
1723 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1724
cb950d93 1725 dev_kfree_skb(resp);
541d920b 1726 return rc;
c46ee386
AAJ		 1727}
1728
90099433
EL		 1729static int pn533_activate_target(struct nfc_dev *nfc_dev,
1730 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1731{
1732 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1733 int rc;
1734
1735 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1736 protocol);
c46ee386
AAJ		 1737
1738 if (dev->poll_mod_count) {
6ca55372
WR		 1739 nfc_dev_err(&dev->interface->dev,
1740 "Cannot activate while polling");
c46ee386
AAJ		 1741 return -EBUSY;
1742 }
1743
1744 if (dev->tgt_active_prot) {
6ca55372
WR		 1745 nfc_dev_err(&dev->interface->dev,
1746 "There is already an active target");
c46ee386
AAJ		 1747 return -EBUSY;
1748 }
1749
1750 if (!dev->tgt_available_prots) {
6ca55372
WR		 1751 nfc_dev_err(&dev->interface->dev,
1752 "There is no available target to activate");
c46ee386
AAJ		 1753 return -EINVAL;
1754 }
1755
1756 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1757 nfc_dev_err(&dev->interface->dev,
1758 "Target doesn't support requested proto %u",
1759 protocol);
c46ee386
AAJ		 1760 return -EINVAL;
1761 }
1762
1763 if (protocol == NFC_PROTO_NFC_DEP) {
1764 rc = pn533_activate_target_nfcdep(dev);
1765 if (rc) {
6ca55372
WR		 1766 nfc_dev_err(&dev->interface->dev,
1767 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1768 return rc;
1769 }
1770 }
1771
1772 dev->tgt_active_prot = protocol;
1773 dev->tgt_available_prots = 0;
1774
1775 return 0;
1776}
1777
90099433
EL		 1778static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1779 struct nfc_target *target)
c46ee386
AAJ		 1780{
1781 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1782
1783 struct sk_buff *skb;
1784 struct sk_buff *resp;
1785
c46ee386
AAJ		 1786 int rc;
1787
1788 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1789
1790 if (!dev->tgt_active_prot) {
1791 nfc_dev_err(&dev->interface->dev, "There is no active target");
1792 return;
1793 }
1794
1795 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1796 skb_queue_purge(&dev->resp_q);
1797
9e2d493e 1798 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1799 if (!skb)
1800 return;
c46ee386 1801
cb950d93 1802 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1803
cb950d93
WR		 1804 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1805 if (IS_ERR(resp))
c46ee386 1806 return;
c46ee386 1807
cb950d93 1808 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1809 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1810 nfc_dev_err(&dev->interface->dev,
1811 "Error 0x%x when releasing the target", rc);
c46ee386 1812
cb950d93 1813 dev_kfree_skb(resp);
c46ee386
AAJ		 1814 return;
1815}
1816
361f3cb7
SO		 1817
1818static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1819 struct sk_buff *resp)
361f3cb7 1820{
13003649 1821 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1822 u8 target_gt_len;
1823 int rc;
13003649 1824 u8 active = *(u8 *)arg;
70418e6e
WR		 1825
1826 kfree(arg);
361f3cb7 1827
13003649
WR		 1828 if (IS_ERR(resp))
1829 return PTR_ERR(resp);
361f3cb7
SO		 1830
1831 if (dev->tgt_available_prots &&
1832 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1833 nfc_dev_err(&dev->interface->dev,
5d467742 1834 "The target does not support DEP");
13003649
WR		 1835 rc = -EINVAL;
1836 goto error;
361f3cb7
SO		 1837 }
1838
13003649
WR		 1839 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1840
1841 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1842 if (rc != PN533_CMD_RET_SUCCESS) {
1843 nfc_dev_err(&dev->interface->dev,
a45e1c8d 1844 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 1845 goto error;
361f3cb7
SO		 1846 }
1847
1848 if (!dev->tgt_available_prots) {
13003649
WR		 1849 struct nfc_target nfc_target;
1850
361f3cb7
SO		 1851 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1852
1853 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1854 nfc_target.nfcid1_len = 10;
13003649 1855 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1856 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1857 if (rc)
13003649 1858 goto error;
361f3cb7
SO		 1859
1860 dev->tgt_available_prots = 0;
1861 }
1862
1863 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1864
1865 /* ATR_RES general bytes are located at offset 17 */
13003649 1866 target_gt_len = resp->len - 17;
361f3cb7 1867 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1868 rsp->gt, target_gt_len);
361f3cb7
SO		 1869 if (rc == 0)
1870 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1871 dev->nfc_dev->targets[0].idx,
1872 !active, NFC_RF_INITIATOR);
361f3cb7 1873
13003649
WR		 1874error:
1875 dev_kfree_skb(resp);
1876 return rc;
361f3cb7
SO		 1877}
1878
41a8ec49
SO		 1879static int pn533_mod_to_baud(struct pn533 *dev)
1880{
1881 switch (dev->poll_mod_curr) {
1882 case PN533_POLL_MOD_106KBPS_A:
1883 return 0;
1884 case PN533_POLL_MOD_212KBPS_FELICA:
1885 return 1;
1886 case PN533_POLL_MOD_424KBPS_FELICA:
1887 return 2;
1888 default:
1889 return -EINVAL;
1890 }
1891}
1892
d7f3345d 1893#define PASSIVE_DATA_LEN 5
90099433 1894static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1895 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1896{
1897 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 1898 struct sk_buff *skb;
1899 int rc, baud, skb_len;
1900 u8 *next, *arg;
1901
d7f3345d 1902 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 1903
1904 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1905
361f3cb7
SO		 1906 if (dev->poll_mod_count) {
1907 nfc_dev_err(&dev->interface->dev,
5d467742 1908 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 1909 return -EBUSY;
1910 }
1911
1912 if (dev->tgt_active_prot) {
1913 nfc_dev_err(&dev->interface->dev,
5d467742 1914 "There is already an active target");
361f3cb7
SO		 1915 return -EBUSY;
1916 }
1917
41a8ec49
SO		 1918 baud = pn533_mod_to_baud(dev);
1919 if (baud < 0) {
1920 nfc_dev_err(&dev->interface->dev,
1921 "Invalid curr modulation %d", dev->poll_mod_curr);
1922 return baud;
1923 }
1924
13003649 1925 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 1926 if (comm_mode == NFC_COMM_PASSIVE)
13003649 1927 skb_len += PASSIVE_DATA_LEN;
d7f3345d 1928
9e2d493e 1929 skb = pn533_alloc_skb(dev, skb_len);
13003649 1930 if (!skb)
361f3cb7
SO		 1931 return -ENOMEM;
1932
13003649
WR		 1933 *skb_put(skb, 1) = !comm_mode; /* ActPass */
1934 *skb_put(skb, 1) = baud; /* Baud rate */
1935
1936 next = skb_put(skb, 1); /* Next */
1937 *next = 0;
361f3cb7 1938
13003649
WR		 1939 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
1940 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
1941 PASSIVE_DATA_LEN);
1942 *next |= 1;
d7f3345d
SO		 1943 }
1944
47807d3d 1945 if (gb != NULL && gb_len > 0) {
13003649
WR		 1946 memcpy(skb_put(skb, gb_len), gb, gb_len);
1947 *next |= 4; /* We have some Gi */
361f3cb7 1948 } else {
13003649 1949 *next = 0;
361f3cb7
SO		 1950 }
1951
13003649
WR		 1952 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1953 if (!arg) {
1954 dev_kfree_skb(skb);
1955 return -ENOMEM;
1956 }
361f3cb7 1957
13003649 1958 *arg = !comm_mode;
361f3cb7 1959
13003649
WR		 1960 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1961 pn533_in_dep_link_up_complete, arg);
1962
1963 if (rc < 0) {
1964 dev_kfree_skb(skb);
1965 kfree(arg);
1966 }
361f3cb7
SO		 1967
1968 return rc;
1969}
1970
1971static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1972{
6fbbdc16
SO		 1973 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1974
fcfafc76
WR		 1975 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1976
6fbbdc16
SO		 1977 pn533_poll_reset_mod_list(dev);
1978
51ad304c
SO		 1979 if (dev->tgt_mode || dev->tgt_active_prot) {
1980 pn533_send_ack(dev, GFP_KERNEL);
1981 usb_kill_urb(dev->in_urb);
1982 }
1983
1984 dev->tgt_active_prot = 0;
1985 dev->tgt_mode = 0;
1986
1987 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 1988
1989 return 0;
1990}
1991
c46ee386 1992struct pn533_data_exchange_arg {
c46ee386
AAJ		 1993 data_exchange_cb_t cb;
1994 void *cb_context;
1995};
1996
6ff73fd2
SO		 1997static struct sk_buff *pn533_build_response(struct pn533 *dev)
1998{
1999 struct sk_buff *skb, *tmp, *t;
2000 unsigned int skb_len = 0, tmp_len = 0;
2001
fcfafc76 2002 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2003
2004 if (skb_queue_empty(&dev->resp_q))
2005 return NULL;
2006
2007 if (skb_queue_len(&dev->resp_q) == 1) {
2008 skb = skb_dequeue(&dev->resp_q);
2009 goto out;
2010 }
2011
2012 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2013 skb_len += tmp->len;
2014
2015 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2016 __func__, skb_len);
2017
2018 skb = alloc_skb(skb_len, GFP_KERNEL);
2019 if (skb == NULL)
2020 goto out;
2021
2022 skb_put(skb, skb_len);
2023
2024 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2025 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2026 tmp_len += tmp->len;
2027 }
2028
2029out:
2030 skb_queue_purge(&dev->resp_q);
2031
2032 return skb;
2033}
2034
c46ee386 2035static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2036 struct sk_buff *resp)
c46ee386
AAJ		 2037{
2038 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2039 struct sk_buff *skb;
2040 int rc = 0;
2041 u8 status, ret, mi;
c46ee386
AAJ		 2042
2043 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2044
b1e666f5
WR		 2045 if (IS_ERR(resp)) {
2046 rc = PTR_ERR(resp);
2047 goto _error;
c46ee386
AAJ		 2048 }
2049
b1e666f5
WR		 2050 status = resp->data[0];
2051 ret = status & PN533_CMD_RET_MASK;
2052 mi = status & PN533_CMD_MI_MASK;
2053
2054 skb_pull(resp, sizeof(status));
c46ee386 2055
b1e666f5
WR		 2056 if (ret != PN533_CMD_RET_SUCCESS) {
2057 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2058 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2059 rc = -EIO;
c46ee386
AAJ		 2060 goto error;
2061 }
2062
b1e666f5 2063 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2064
b1e666f5
WR		 2065 if (mi) {
2066 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2067 queue_work(dev->wq, &dev->mi_work);
2068 return -EINPROGRESS;
c46ee386
AAJ		 2069 }
2070
6ff73fd2 2071 skb = pn533_build_response(dev);
b1e666f5 2072 if (!skb)
6ff73fd2 2073 goto error;
c46ee386 2074
6ff73fd2 2075 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2076 kfree(arg);
2077 return 0;
2078
2079error:
b1e666f5
WR		 2080 dev_kfree_skb(resp);
2081_error:
6ff73fd2 2082 skb_queue_purge(&dev->resp_q);
b1e666f5 2083 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2084 kfree(arg);
b1e666f5 2085 return rc;
c46ee386
AAJ		 2086}
2087
be9ae4ce
SO		 2088static int pn533_transceive(struct nfc_dev *nfc_dev,
2089 struct nfc_target *target, struct sk_buff *skb,
2090 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2091{
2092 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2093 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2094 int rc;
2095
2096 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2097
b1e666f5
WR		 2098 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2099 /* TODO: Implement support to multi-part data exchange */
2100 nfc_dev_err(&dev->interface->dev,
2101 "Data length greater than the max allowed: %d",
2102 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2103 rc = -ENOSYS;
2104 goto error;
2105 }
2106
c46ee386 2107 if (!dev->tgt_active_prot) {
6ca55372
WR		 2108 nfc_dev_err(&dev->interface->dev,
2109 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2110 rc = -EINVAL;
2111 goto error;
2112 }
2113
b1e666f5 2114 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2115 if (!arg) {
2116 rc = -ENOMEM;
b1e666f5 2117 goto error;
c46ee386
AAJ		 2118 }
2119
c46ee386
AAJ		 2120 arg->cb = cb;
2121 arg->cb_context = cb_context;
2122
b1e666f5
WR		 2123 switch (dev->device_type) {
2124 case PN533_DEVICE_PASORI:
2125 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2126 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2127 skb,
2128 pn533_data_exchange_complete,
2129 arg);
2130
2131 break;
2132 }
2133 default:
2134 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2135
2136 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2137 skb, pn533_data_exchange_complete,
2138 arg);
2139
2140 break;
c46ee386
AAJ		 2141 }
2142
b1e666f5
WR		 2143 if (rc < 0) /* rc from send_async */
2144 goto error;
2145
c46ee386
AAJ		 2146 return 0;
2147
c46ee386 2148error:
b1e666f5
WR		 2149 kfree(arg);
2150 dev_kfree_skb(skb);
c46ee386
AAJ		 2151 return rc;
2152}
2153
dadb06f2 2154static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2155 struct sk_buff *resp)
dadb06f2 2156{
e4878823 2157 u8 status;
5b412fd1 2158
dadb06f2
SO		 2159 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2160
e4878823
WR		 2161 if (IS_ERR(resp))
2162 return PTR_ERR(resp);
5b412fd1 2163
e4878823 2164 status = resp->data[0];
dadb06f2 2165
e4878823 2166 dev_kfree_skb(resp);
dadb06f2 2167
e4878823 2168 if (status != 0) {
dadb06f2
SO		 2169 nfc_tm_deactivated(dev->nfc_dev);
2170
51ad304c
SO		 2171 dev->tgt_mode = 0;
2172
dadb06f2
SO		 2173 return 0;
2174 }
2175
2176 queue_work(dev->wq, &dev->tg_work);
2177
2178 return 0;
2179}
2180
2181static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2182{
2183 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2184 int rc;
2185
2186 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2187
e4878823 2188 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2189 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2190 "Data length greater than the max allowed: %d",
2191 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2192 return -ENOSYS;
dadb06f2
SO		 2193 }
2194
e4878823
WR		 2195 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2196 pn533_tm_send_complete, NULL);
2197 if (rc < 0)
2198 dev_kfree_skb(skb);
dadb06f2
SO		 2199
2200 return rc;
2201}
2202
6ff73fd2
SO		 2203static void pn533_wq_mi_recv(struct work_struct *work)
2204{
2205 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2206
2207 struct sk_buff *skb;
6ff73fd2
SO		 2208 int rc;
2209
2210 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2211
9e2d493e 2212 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2213 if (!skb)
2214 goto error;
6ff73fd2 2215
b1e666f5
WR		 2216 switch (dev->device_type) {
2217 case PN533_DEVICE_PASORI:
2218 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2219 rc = pn533_send_cmd_direct_async(dev,
2220 PN533_CMD_IN_COMM_THRU,
2221 skb,
2222 pn533_data_exchange_complete,
2223 dev->cmd_complete_mi_arg);
6ff73fd2 2224
b1e666f5
WR		 2225 break;
2226 }
2227 default:
2228 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2229
b1e666f5
WR		 2230 rc = pn533_send_cmd_direct_async(dev,
2231 PN533_CMD_IN_DATA_EXCHANGE,
2232 skb,
2233 pn533_data_exchange_complete,
2234 dev->cmd_complete_mi_arg);
b1bb290a 2235
b1e666f5 2236 break;
6ff73fd2
SO		 2237 }
2238
b1e666f5 2239 if (rc == 0) /* success */
6ff73fd2
SO		 2240 return;
2241
b1e666f5
WR		 2242 nfc_dev_err(&dev->interface->dev,
2243 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2244
b1e666f5 2245 dev_kfree_skb(skb);
140ef7f6 2246 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2247
b1e666f5 2248error:
6ff73fd2 2249 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2250 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2251}
2252
c46ee386
AAJ		 2253static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2254 u8 cfgdata_len)
2255{
cb950d93
WR		 2256 struct sk_buff *skb;
2257 struct sk_buff *resp;
2258
2259 int skb_len;
c46ee386
AAJ		 2260
2261 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2262
cb950d93 2263 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2264
9e2d493e 2265 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2266 if (!skb)
2267 return -ENOMEM;
c46ee386 2268
cb950d93
WR		 2269 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2270 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2271
cb950d93
WR		 2272 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2273 if (IS_ERR(resp))
2274 return PTR_ERR(resp);
c46ee386 2275
cb950d93
WR		 2276 dev_kfree_skb(resp);
2277 return 0;
2278}
2279
2280static int pn533_get_firmware_version(struct pn533 *dev,
2281 struct pn533_fw_version *fv)
2282{
2283 struct sk_buff *skb;
2284 struct sk_buff *resp;
2285
9e2d493e 2286 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2287 if (!skb)
2288 return -ENOMEM;
2289
2290 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2291 if (IS_ERR(resp))
2292 return PTR_ERR(resp);
2293
2294 fv->ic = resp->data[0];
2295 fv->ver = resp->data[1];
2296 fv->rev = resp->data[2];
2297 fv->support = resp->data[3];
2298
2299 dev_kfree_skb(resp);
2300 return 0;
c46ee386
AAJ		 2301}
2302
f75c2913 2303static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2304{
cb950d93
WR		 2305 struct sk_buff *skb;
2306 struct sk_buff *resp;
5c7b0531
SO		 2307
2308 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2309
9e2d493e 2310 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2311 if (!skb)
2312 return -ENOMEM;
5c7b0531 2313
cb950d93 2314 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2315
cb950d93
WR		 2316 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2317 if (IS_ERR(resp))
2318 return PTR_ERR(resp);
5c7b0531 2319
cb950d93 2320 dev_kfree_skb(resp);
5c7b0531 2321
94c5c156 2322 return 0;
5c7b0531
SO		 2323}
2324
2325static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2326 .dev_up = NULL,
2327 .dev_down = NULL,
361f3cb7
SO		 2328 .dep_link_up = pn533_dep_link_up,
2329 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2330 .start_poll = pn533_start_poll,
2331 .stop_poll = pn533_stop_poll,
2332 .activate_target = pn533_activate_target,
2333 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2334 .im_transceive = pn533_transceive,
dadb06f2 2335 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2336};
2337
5c7b0531
SO		 2338static int pn533_setup(struct pn533 *dev)
2339{
2340 struct pn533_config_max_retries max_retries;
2341 struct pn533_config_timing timing;
2342 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2343 int rc;
2344
2345 switch (dev->device_type) {
2346 case PN533_DEVICE_STD:
2347 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2348 max_retries.mx_rty_psl = 2;
2349 max_retries.mx_rty_passive_act =
2350 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2351
2352 timing.rfu = PN533_CONFIG_TIMING_102;
2353 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2354 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2355
2356 break;
2357
2358 case PN533_DEVICE_PASORI:
2359 max_retries.mx_rty_atr = 0x2;
2360 max_retries.mx_rty_psl = 0x1;
2361 max_retries.mx_rty_passive_act =
2362 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2363
2364 timing.rfu = PN533_CONFIG_TIMING_102;
2365 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2366 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2367
2368 break;
2369
2370 default:
2371 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2372 dev->device_type);
2373 return -EINVAL;
2374 }
2375
2376 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2377 (u8 *)&max_retries, sizeof(max_retries));
2378 if (rc) {
2379 nfc_dev_err(&dev->interface->dev,
2380 "Error on setting MAX_RETRIES config");
2381 return rc;
2382 }
2383
2384
2385 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2386 (u8 *)&timing, sizeof(timing));
2387 if (rc) {
2388 nfc_dev_err(&dev->interface->dev,
2389 "Error on setting RF timings");
2390 return rc;
2391 }
2392
2393 switch (dev->device_type) {
2394 case PN533_DEVICE_STD:
2395 break;
2396
2397 case PN533_DEVICE_PASORI:
f75c2913 2398 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2399
2400 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2401 pasori_cfg, 3);
2402 if (rc) {
2403 nfc_dev_err(&dev->interface->dev,
2404 "Error while settings PASORI config");
2405 return rc;
2406 }
2407
f75c2913 2408 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2409
2410 break;
2411 }
2412
2413 return 0;
2414}
2415
c46ee386
AAJ		 2416static int pn533_probe(struct usb_interface *interface,
2417 const struct usb_device_id *id)
2418{
cb950d93 2419 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2420 struct pn533 *dev;
2421 struct usb_host_interface *iface_desc;
2422 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2423 int in_endpoint = 0;
2424 int out_endpoint = 0;
2425 int rc = -ENOMEM;
2426 int i;
2427 u32 protocols;
2428
2429 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2430 if (!dev)
2431 return -ENOMEM;
2432
2433 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2434 dev->interface = interface;
0201ed03 2435 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2436
2437 iface_desc = interface->cur_altsetting;
2438 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2439 endpoint = &iface_desc->endpoint[i].desc;
2440
8d25ca79 2441 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2442 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2443
8d25ca79 2444 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2445 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2446 }
2447
2448 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2449 nfc_dev_err(&interface->dev,
2450 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2451 rc = -ENODEV;
2452 goto error;
2453 }
2454
c46ee386 2455 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2456 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2457
a5798094 2458 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2459 goto error;
2460
2461 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2462 usb_rcvbulkpipe(dev->udev, in_endpoint),
2463 NULL, 0, NULL, dev);
c46ee386 2464 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2465 usb_sndbulkpipe(dev->udev, out_endpoint),
2466 NULL, 0, pn533_send_complete, dev);
c46ee386 2467
5d50b364
SO		 2468 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2469 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2470 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2471 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2472 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2473 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2474 if (dev->wq == NULL)
2475 goto error;
c46ee386 2476
6fbbdc16
SO		 2477 init_timer(&dev->listen_timer);
2478 dev->listen_timer.data = (unsigned long) dev;
2479 dev->listen_timer.function = pn533_listen_mode_timer;
2480
6ff73fd2
SO		 2481 skb_queue_head_init(&dev->resp_q);
2482
5d50b364
SO		 2483 INIT_LIST_HEAD(&dev->cmd_queue);
2484
c46ee386
AAJ		 2485 usb_set_intfdata(interface, dev);
2486
9e2d493e 2487 dev->ops = &pn533_std_frame_ops;
c46ee386 2488
5c7b0531
SO		 2489 dev->device_type = id->driver_info;
2490 switch (dev->device_type) {
2491 case PN533_DEVICE_STD:
2492 protocols = PN533_ALL_PROTOCOLS;
2493 break;
2494
2495 case PN533_DEVICE_PASORI:
2496 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2497 break;
2498
2499 default:
2500 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2501 dev->device_type);
2502 rc = -EINVAL;
2503 goto destroy_wq;
2504 }
c46ee386 2505
9e2d493e
WR		 2506 memset(&fw_ver, 0, sizeof(fw_ver));
2507 rc = pn533_get_firmware_version(dev, &fw_ver);
2508 if (rc < 0)
2509 goto destroy_wq;
2510
2511 nfc_dev_info(&dev->interface->dev,
2512 "NXP PN533 firmware ver %d.%d now attached",
2513 fw_ver.ver, fw_ver.rev);
2514
2515
e8753043 2516 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
390a1bd8 2517 NFC_SE_NONE,
9e2d493e 2518 dev->ops->tx_header_len +
e8753043 2519 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2520 dev->ops->tx_tail_len);
c46ee386 2521 if (!dev->nfc_dev)
4849f85e 2522 goto destroy_wq;
c46ee386
AAJ		 2523
2524 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2525 nfc_set_drvdata(dev->nfc_dev, dev);
2526
2527 rc = nfc_register_device(dev->nfc_dev);
2528 if (rc)
2529 goto free_nfc_dev;
2530
5c7b0531
SO		 2531 rc = pn533_setup(dev);
2532 if (rc)
34a85bfc 2533 goto unregister_nfc_dev;
34a85bfc 2534
c46ee386
AAJ		 2535 return 0;
2536
9f2f8ba1
SO		 2537unregister_nfc_dev:
2538 nfc_unregister_device(dev->nfc_dev);
2539
c46ee386
AAJ		 2540free_nfc_dev:
2541 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2542
4849f85e
SO		 2543destroy_wq:
2544 destroy_workqueue(dev->wq);
c46ee386 2545error:
c46ee386 2546 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2547 usb_free_urb(dev->out_urb);
2548 kfree(dev);
2549 return rc;
2550}
2551
2552static void pn533_disconnect(struct usb_interface *interface)
2553{
2554 struct pn533 *dev;
5d50b364 2555 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2556
2557 dev = usb_get_intfdata(interface);
2558 usb_set_intfdata(interface, NULL);
2559
2560 nfc_unregister_device(dev->nfc_dev);
2561 nfc_free_device(dev->nfc_dev);
2562
2563 usb_kill_urb(dev->in_urb);
2564 usb_kill_urb(dev->out_urb);
2565
4849f85e 2566 destroy_workqueue(dev->wq);
c46ee386 2567
6ff73fd2
SO		 2568 skb_queue_purge(&dev->resp_q);
2569
6fbbdc16
SO		 2570 del_timer(&dev->listen_timer);
2571
5d50b364
SO		 2572 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2573 list_del(&cmd->queue);
2574 kfree(cmd);
2575 }
2576
c46ee386 2577 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2578 usb_free_urb(dev->out_urb);
2579 kfree(dev);
2580
276556db 2581 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2582}
2583
2584static struct usb_driver pn533_driver = {
2585 .name = "pn533",
2586 .probe = pn533_probe,
2587 .disconnect = pn533_disconnect,
2588 .id_table = pn533_table,
2589};
2590
fe748483 2591module_usb_driver(pn533_driver);
c46ee386 2592
e70b96e9
WR		 2593MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2594MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2595MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2596MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2597MODULE_VERSION(VERSION);
2598MODULE_LICENSE("GPL");
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