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NFC: pn533: Move wq_in_error to cmd context
[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;
d5590bba 317 u32 device_type;
c46ee386
AAJ		 318
319 struct urb *out_urb;
c46ee386 320 struct urb *in_urb;
c46ee386 321
6ff73fd2
SO		 322 struct sk_buff_head resp_q;
323
4849f85e
SO		 324 struct workqueue_struct *wq;
325 struct work_struct cmd_work;
5d50b364 326 struct work_struct cmd_complete_work;
6fbbdc16 327 struct work_struct poll_work;
6ff73fd2 328 struct work_struct mi_work;
103b34cf 329 struct work_struct tg_work;
d5590bba
WR		 330
331 struct list_head cmd_queue;
332 struct pn533_cmd *cmd;
333 u8 cmd_pending;
d5590bba 334 struct mutex cmd_lock; /* protects cmd queue */
c46ee386 335
b1e666f5 336 void *cmd_complete_mi_arg;
c46ee386
AAJ		 337
338 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
339 u8 poll_mod_count;
340 u8 poll_mod_curr;
341 u32 poll_protocols;
6fbbdc16 342 u32 listen_protocols;
d5590bba
WR		 343 struct timer_list listen_timer;
344 int cancel_listen;
6fbbdc16
SO		 345
346 u8 *gb;
347 size_t gb_len;
c46ee386
AAJ		 348
349 u8 tgt_available_prots;
350 u8 tgt_active_prot;
51ad304c 351 u8 tgt_mode;
5c7b0531 352
9e2d493e 353 struct pn533_frame_ops *ops;
5d50b364
SO		 354};
355
356struct pn533_cmd {
357 struct list_head queue;
4b2a9532 358 u8 code;
f87bc9fb 359 int status;
aada17ac
WR		 360 struct sk_buff *req;
361 struct sk_buff *resp;
9e2d493e 362 int resp_len;
4231604b
WR		 363 pn533_send_async_complete_t complete_cb;
364 void *complete_cb_context;
c46ee386
AAJ		 365};
366
63123108 367struct pn533_std_frame {
c46ee386
AAJ		 368 u8 preamble;
369 __be16 start_frame;
370 u8 datalen;
371 u8 datalen_checksum;
372 u8 data[];
373} __packed;
374
9e2d493e
WR		 375struct pn533_frame_ops {
376 void (*tx_frame_init)(void *frame, u8 cmd_code);
377 void (*tx_frame_finish)(void *frame);
378 void (*tx_update_payload_len)(void *frame, int len);
379 int tx_header_len;
380 int tx_tail_len;
381
382 bool (*rx_is_frame_valid)(void *frame);
383 int (*rx_frame_size)(void *frame);
384 int rx_header_len;
385 int rx_tail_len;
386
387 int max_payload_len;
388 u8 (*get_cmd_code)(void *frame);
389};
390
c46ee386 391/* The rule: value + checksum = 0 */
63123108 392static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 393{
394 return ~value + 1;
395}
396
397/* The rule: sum(data elements) + checksum = 0 */
63123108 398static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 399{
400 u8 sum = 0;
401 int i;
402
403 for (i = 0; i < datalen; i++)
404 sum += data[i];
405
63123108 406 return pn533_std_checksum(sum);
c46ee386
AAJ		 407}
408
63123108 409static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 410{
63123108 411 struct pn533_std_frame *frame = _frame;
9e2d493e 412
c46ee386 413 frame->preamble = 0;
63123108
WR		 414 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
415 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
416 PN533_STD_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 417 frame->datalen = 2;
418}
419
63123108 420static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 421{
63123108 422 struct pn533_std_frame *frame = _frame;
9e2d493e 423
63123108 424 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 425
63123108
WR		 426 PN533_STD_FRAME_CHECKSUM(frame) =
427 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 428
63123108 429 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 430}
431
63123108 432static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 433{
63123108 434 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 435
436 frame->datalen += len;
437}
438
63123108 439static bool pn533_std_rx_frame_is_valid(void *_frame)
c46ee386
AAJ		 440{
441 u8 checksum;
63123108 442 struct pn533_std_frame *frame = _frame;
c46ee386 443
63123108 444 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 445 return false;
446
63123108 447 checksum = pn533_std_checksum(frame->datalen);
c46ee386
AAJ		 448 if (checksum != frame->datalen_checksum)
449 return false;
450
63123108
WR		 451 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
452 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
c46ee386
AAJ		 453 return false;
454
455 return true;
456}
457
63123108 458static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 459{
63123108 460 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 461 return false;
462
463 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
464 return false;
465
466 return true;
467}
468
63123108 469static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 470{
63123108 471 struct pn533_std_frame *f = frame;
9e2d493e 472
63123108
WR		 473 return sizeof(struct pn533_std_frame) + f->datalen +
474 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 475}
476
63123108 477static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 478{
63123108 479 struct pn533_std_frame *f = frame;
9e2d493e 480
63123108 481 return PN533_STD_FRAME_CMD(f);
9e2d493e
WR		 482}
483
ef3d56e1 484static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 485 .tx_frame_init = pn533_std_tx_frame_init,
486 .tx_frame_finish = pn533_std_tx_frame_finish,
487 .tx_update_payload_len = pn533_std_tx_update_payload_len,
488 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
489 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
490
491 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
492 .rx_frame_size = pn533_std_rx_frame_size,
493 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
494 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
495
496 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
497 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 498};
499
500static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 501{
2c206fb7 502 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 503 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 504}
505
c46ee386
AAJ		 506static void pn533_recv_response(struct urb *urb)
507{
508 struct pn533 *dev = urb->context;
f87bc9fb 509 struct pn533_cmd *cmd = dev->cmd;
9e2d493e 510 u8 *in_frame;
c46ee386 511
f87bc9fb
WR		 512 cmd->status = urb->status;
513
c46ee386
AAJ		 514 switch (urb->status) {
515 case 0:
f8f99171 516 break; /* success */
c46ee386
AAJ		 517 case -ECONNRESET:
518 case -ENOENT:
6ca55372 519 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 520 "The urb has been canceled (status %d)",
521 urb->status);
4849f85e 522 goto sched_wq;
f8f99171 523 case -ESHUTDOWN:
c46ee386 524 default:
6ca55372 525 nfc_dev_err(&dev->interface->dev,
f8f99171 526 "Urb failure (status %d)", urb->status);
4849f85e 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");
f87bc9fb 538 cmd->status = -EIO;
4849f85e 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");
f87bc9fb 545 cmd->status = -EIO;
4849f85e 546 goto sched_wq;
c46ee386
AAJ		 547 }
548
4849f85e 549sched_wq:
5d50b364 550 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 551}
552
553static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
554{
555 dev->in_urb->complete = pn533_recv_response;
556
557 return usb_submit_urb(dev->in_urb, flags);
558}
559
560static void pn533_recv_ack(struct urb *urb)
561{
562 struct pn533 *dev = urb->context;
f87bc9fb 563 struct pn533_cmd *cmd = dev->cmd;
63123108 564 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 565 int rc;
566
f87bc9fb
WR		 567 cmd->status = urb->status;
568
c46ee386
AAJ		 569 switch (urb->status) {
570 case 0:
f8f99171 571 break; /* success */
c46ee386
AAJ		 572 case -ECONNRESET:
573 case -ENOENT:
6ca55372 574 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 575 "The urb has been stopped (status %d)",
576 urb->status);
4849f85e 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 582 goto sched_wq;
c46ee386
AAJ		 583 }
584
585 in_frame = dev->in_urb->transfer_buffer;
586
63123108 587 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 588 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
f87bc9fb 589 cmd->status = -EIO;
4849f85e 590 goto sched_wq;
c46ee386
AAJ		 591 }
592
c46ee386
AAJ		 593 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
594 if (rc) {
6ca55372
WR		 595 nfc_dev_err(&dev->interface->dev,
596 "usb_submit_urb failed with result %d", rc);
f87bc9fb 597 cmd->status = rc;
4849f85e 598 goto sched_wq;
c46ee386
AAJ		 599 }
600
601 return;
602
4849f85e 603sched_wq:
5d50b364 604 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 605}
606
607static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
608{
609 dev->in_urb->complete = pn533_recv_ack;
610
611 return usb_submit_urb(dev->in_urb, flags);
612}
613
614static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
615{
63123108 616 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 617 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 618 int rc;
619
620 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
621
5b5a4437
WR		 622 dev->out_urb->transfer_buffer = ack;
623 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 624 rc = usb_submit_urb(dev->out_urb, flags);
625
626 return rc;
627}
628
e8f40531
WR		 629static int __pn533_send_frame_async(struct pn533 *dev,
630 struct sk_buff *out,
631 struct sk_buff *in,
ddf19d20 632 int in_len)
c46ee386
AAJ		 633{
634 int rc;
635
e8f40531
WR		 636 dev->out_urb->transfer_buffer = out->data;
637 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 638
e8f40531
WR		 639 dev->in_urb->transfer_buffer = in->data;
640 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 641
e279f84f
SO		 642 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
643 out->data, out->len, false);
99e591be 644
d94ea4f5 645 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 646 if (rc)
647 return rc;
648
d94ea4f5 649 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
c46ee386
AAJ		 650 if (rc)
651 goto error;
652
653 return 0;
654
655error:
656 usb_unlink_urb(dev->out_urb);
657 return rc;
658}
659
9e2d493e
WR		 660static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
661 struct sk_buff *skb)
aada17ac 662{
aada17ac
WR		 663 /* payload is already there, just update datalen */
664 int payload_len = skb->len;
9e2d493e 665 struct pn533_frame_ops *ops = dev->ops;
aada17ac 666
aada17ac 667
9e2d493e
WR		 668 skb_push(skb, ops->tx_header_len);
669 skb_put(skb, ops->tx_tail_len);
aada17ac 670
9e2d493e
WR		 671 ops->tx_frame_init(skb->data, cmd_code);
672 ops->tx_update_payload_len(skb->data, payload_len);
673 ops->tx_frame_finish(skb->data);
aada17ac
WR		 674}
675
ddf19d20 676static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 677{
ddf19d20 678 struct pn533_cmd *cmd = dev->cmd;
f87bc9fb 679 int status = cmd->status;
aada17ac 680
4231604b
WR		 681 struct sk_buff *req = cmd->req;
682 struct sk_buff *resp = cmd->resp;
aada17ac 683
aada17ac
WR		 684 int rc;
685
686 dev_kfree_skb(req);
687
0c33d262 688 if (status < 0) {
4231604b
WR		 689 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
690 ERR_PTR(status));
aada17ac 691 dev_kfree_skb(resp);
2c206fb7 692 goto done;
aada17ac
WR		 693 }
694
9e2d493e
WR		 695 skb_put(resp, dev->ops->rx_frame_size(resp->data));
696 skb_pull(resp, dev->ops->rx_header_len);
697 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 698
4231604b 699 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 700
2c206fb7 701done:
4231604b 702 kfree(cmd);
2c206fb7 703 dev->cmd = NULL;
aada17ac
WR		 704 return rc;
705}
706
707static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
708 struct sk_buff *req, struct sk_buff *resp,
709 int resp_len,
710 pn533_send_async_complete_t complete_cb,
711 void *complete_cb_context)
712{
713 struct pn533_cmd *cmd;
aada17ac
WR		 714 int rc = 0;
715
fcfafc76 716 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
aada17ac 717
4231604b
WR		 718 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
719 if (!cmd)
aada17ac
WR		 720 return -ENOMEM;
721
4b2a9532 722 cmd->code = cmd_code;
4231604b
WR		 723 cmd->req = req;
724 cmd->resp = resp;
725 cmd->resp_len = resp_len;
726 cmd->complete_cb = complete_cb;
727 cmd->complete_cb_context = complete_cb_context;
aada17ac 728
9e2d493e 729 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 730
731 mutex_lock(&dev->cmd_lock);
732
733 if (!dev->cmd_pending) {
ddf19d20 734 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 735 if (rc)
736 goto error;
737
738 dev->cmd_pending = 1;
2c206fb7 739 dev->cmd = cmd;
aada17ac
WR		 740 goto unlock;
741 }
742
fcfafc76
WR		 743 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
744 cmd_code);
aada17ac 745
aada17ac 746 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 747 list_add_tail(&cmd->queue, &dev->cmd_queue);
748
749 goto unlock;
750
751error:
4231604b 752 kfree(cmd);
aada17ac
WR		 753unlock:
754 mutex_unlock(&dev->cmd_lock);
755 return rc;
15461aeb
WR		 756}
757
758static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
759 struct sk_buff *req,
760 pn533_send_async_complete_t complete_cb,
761 void *complete_cb_context)
762{
763 struct sk_buff *resp;
764 int rc;
9e2d493e
WR		 765 int resp_len = dev->ops->rx_header_len +
766 dev->ops->max_payload_len +
767 dev->ops->rx_tail_len;
15461aeb 768
15461aeb
WR		 769 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
770 if (!resp)
771 return -ENOMEM;
772
773 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
774 complete_cb_context);
775 if (rc)
776 dev_kfree_skb(resp);
777
778 return rc;
aada17ac
WR		 779}
780
781static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
782 struct sk_buff *req,
783 pn533_send_async_complete_t complete_cb,
784 void *complete_cb_context)
785{
786 struct sk_buff *resp;
787 int rc;
9e2d493e
WR		 788 int resp_len = dev->ops->rx_header_len +
789 dev->ops->max_payload_len +
790 dev->ops->rx_tail_len;
aada17ac 791
9e2d493e 792 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 793 if (!resp)
794 return -ENOMEM;
795
9e2d493e
WR		 796 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
797 complete_cb_context);
aada17ac
WR		 798 if (rc)
799 dev_kfree_skb(resp);
800
801 return rc;
802}
803
b1e666f5
WR		 804/*
805 * pn533_send_cmd_direct_async
806 *
807 * The function sends a piority cmd directly to the chip omiting the cmd
808 * queue. It's intended to be used by chaining mechanism of received responses
809 * where the host has to request every single chunk of data before scheduling
810 * next cmd from the queue.
811 */
812static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
813 struct sk_buff *req,
814 pn533_send_async_complete_t complete_cb,
815 void *complete_cb_context)
816{
b1e666f5 817 struct sk_buff *resp;
4231604b 818 struct pn533_cmd *cmd;
b1e666f5 819 int rc;
9e2d493e
WR		 820 int resp_len = dev->ops->rx_header_len +
821 dev->ops->max_payload_len +
822 dev->ops->rx_tail_len;
b1e666f5 823
b1e666f5
WR		 824 resp = alloc_skb(resp_len, GFP_KERNEL);
825 if (!resp)
826 return -ENOMEM;
827
4231604b
WR		 828 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
829 if (!cmd) {
b1e666f5
WR		 830 dev_kfree_skb(resp);
831 return -ENOMEM;
832 }
833
4b2a9532 834 cmd->code = cmd_code;
4231604b
WR		 835 cmd->req = req;
836 cmd->resp = resp;
837 cmd->resp_len = resp_len;
838 cmd->complete_cb = complete_cb;
839 cmd->complete_cb_context = complete_cb_context;
b1e666f5 840
9e2d493e 841 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 842
ddf19d20 843 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 844 if (rc < 0) {
845 dev_kfree_skb(resp);
4231604b 846 kfree(cmd);
2c206fb7
WR		 847 } else {
848 dev->cmd = cmd;
b1e666f5
WR		 849 }
850
851 return rc;
852}
853
c79490e1
WR		 854static void pn533_wq_cmd_complete(struct work_struct *work)
855{
856 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
857 int rc;
858
859 rc = pn533_send_async_complete(dev);
860 if (rc != -EINPROGRESS)
861 queue_work(dev->wq, &dev->cmd_work);
862}
863
5d50b364
SO		 864static void pn533_wq_cmd(struct work_struct *work)
865{
866 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
867 struct pn533_cmd *cmd;
0ce1fbdd 868 int rc;
5d50b364
SO		 869
870 mutex_lock(&dev->cmd_lock);
871
872 if (list_empty(&dev->cmd_queue)) {
873 dev->cmd_pending = 0;
874 mutex_unlock(&dev->cmd_lock);
875 return;
876 }
877
878 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
879
60ad07ab
SJ		 880 list_del(&cmd->queue);
881
5d50b364
SO		 882 mutex_unlock(&dev->cmd_lock);
883
ddf19d20 884 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 885 if (rc < 0) {
886 dev_kfree_skb(cmd->req);
887 dev_kfree_skb(cmd->resp);
4231604b 888 kfree(cmd);
2c206fb7 889 return;
0ce1fbdd 890 }
2c206fb7
WR		 891
892 dev->cmd = cmd;
5d50b364
SO		 893}
894
c46ee386 895struct pn533_sync_cmd_response {
94c5c156 896 struct sk_buff *resp;
c46ee386
AAJ		 897 struct completion done;
898};
899
94c5c156
WR		 900static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
901 struct sk_buff *resp)
902{
903 struct pn533_sync_cmd_response *arg = _arg;
904
94c5c156
WR		 905 arg->resp = resp;
906 complete(&arg->done);
907
908 return 0;
909}
910
911/* pn533_send_cmd_sync
912 *
913 * Please note the req parameter is freed inside the function to
914 * limit a number of return value interpretations by the caller.
915 *
916 * 1. negative in case of error during TX path -> req should be freed
917 *
918 * 2. negative in case of error during RX path -> req should not be freed
919 * as it's been already freed at the begining of RX path by
920 * async_complete_cb.
921 *
922 * 3. valid pointer in case of succesfult RX path
923 *
924 * A caller has to check a return value with IS_ERR macro. If the test pass,
925 * the returned pointer is valid.
926 *
927 * */
928static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
929 struct sk_buff *req)
930{
931 int rc;
932 struct pn533_sync_cmd_response arg;
933
94c5c156
WR		 934 init_completion(&arg.done);
935
936 rc = pn533_send_cmd_async(dev, cmd_code, req,
937 pn533_send_sync_complete, &arg);
938 if (rc) {
939 dev_kfree_skb(req);
940 return ERR_PTR(rc);
941 }
942
943 wait_for_completion(&arg.done);
944
945 return arg.resp;
946}
947
c46ee386
AAJ		 948static void pn533_send_complete(struct urb *urb)
949{
950 struct pn533 *dev = urb->context;
951
c46ee386
AAJ		 952 switch (urb->status) {
953 case 0:
f8f99171 954 break; /* success */
c46ee386
AAJ		 955 case -ECONNRESET:
956 case -ENOENT:
6ca55372 957 nfc_dev_dbg(&dev->interface->dev,
f8f99171
WR		 958 "The urb has been stopped (status %d)",
959 urb->status);
c46ee386 960 break;
f8f99171 961 case -ESHUTDOWN:
c46ee386 962 default:
f8f99171
WR		 963 nfc_dev_err(&dev->interface->dev,
964 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 965 }
966}
967
9e2d493e 968static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 969{
970 struct sk_buff *skb;
971
9e2d493e 972 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 973 size +
9e2d493e 974 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 975
976 if (skb)
9e2d493e 977 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 978
979 return skb;
980}
981
c46ee386
AAJ		 982struct pn533_target_type_a {
983 __be16 sens_res;
984 u8 sel_res;
985 u8 nfcid_len;
986 u8 nfcid_data[];
987} __packed;
988
989
990#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
991#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
992#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
993
994#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
995#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
996
997#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
998#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
999
1000#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1001#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1002#define PN533_TYPE_A_SEL_PROT_DEP 2
1003#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1004
1005static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1006 int target_data_len)
1007{
1008 u8 ssd;
1009 u8 platconf;
1010
1011 if (target_data_len < sizeof(struct pn533_target_type_a))
1012 return false;
1013
1014 /* The lenght check of nfcid[] and ats[] are not being performed because
1015 the values are not being used */
1016
1017 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1018 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1019 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1020
1021 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1022 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1023 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1024 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1025 return false;
1026
1027 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1028 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1029 return false;
1030
1031 return true;
1032}
1033
1034static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1035 int tgt_data_len)
1036{
1037 struct pn533_target_type_a *tgt_type_a;
1038
37cf4fc6 1039 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1040
1041 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1042 return -EPROTO;
1043
1044 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1045 case PN533_TYPE_A_SEL_PROT_MIFARE:
1046 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1047 break;
1048 case PN533_TYPE_A_SEL_PROT_ISO14443:
1049 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1050 break;
1051 case PN533_TYPE_A_SEL_PROT_DEP:
1052 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1053 break;
1054 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1055 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1056 NFC_PROTO_NFC_DEP_MASK;
1057 break;
1058 }
1059
1060 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1061 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1062 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1063 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1064
1065 return 0;
1066}
1067
1068struct pn533_target_felica {
1069 u8 pol_res;
1070 u8 opcode;
1071 u8 nfcid2[8];
1072 u8 pad[8];
1073 /* optional */
1074 u8 syst_code[];
1075} __packed;
1076
1077#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1078#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1079
1080static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1081 int target_data_len)
1082{
1083 if (target_data_len < sizeof(struct pn533_target_felica))
1084 return false;
1085
1086 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1087 return false;
1088
1089 return true;
1090}
1091
1092static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1093 int tgt_data_len)
1094{
1095 struct pn533_target_felica *tgt_felica;
1096
37cf4fc6 1097 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1098
1099 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1100 return -EPROTO;
1101
5d467742
WR		 1102 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1103 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1104 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1105 else
1106 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1107
7975754f
SO		 1108 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1109 nfc_tgt->sensf_res_len = 9;
1110
c46ee386
AAJ		 1111 return 0;
1112}
1113
1114struct pn533_target_jewel {
1115 __be16 sens_res;
1116 u8 jewelid[4];
1117} __packed;
1118
1119static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1120 int target_data_len)
1121{
1122 u8 ssd;
1123 u8 platconf;
1124
1125 if (target_data_len < sizeof(struct pn533_target_jewel))
1126 return false;
1127
1128 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1129 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1130 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1131
1132 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1133 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1134 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1135 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1136 return false;
1137
1138 return true;
1139}
1140
1141static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1142 int tgt_data_len)
1143{
1144 struct pn533_target_jewel *tgt_jewel;
1145
37cf4fc6 1146 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1147
1148 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1149 return -EPROTO;
1150
1151 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1152 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1153 nfc_tgt->nfcid1_len = 4;
1154 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1155
1156 return 0;
1157}
1158
1159struct pn533_type_b_prot_info {
1160 u8 bitrate;
1161 u8 fsci_type;
1162 u8 fwi_adc_fo;
1163} __packed;
1164
1165#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1166#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1167#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1168
1169struct pn533_type_b_sens_res {
1170 u8 opcode;
1171 u8 nfcid[4];
1172 u8 appdata[4];
1173 struct pn533_type_b_prot_info prot_info;
1174} __packed;
1175
1176#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1177
1178struct pn533_target_type_b {
1179 struct pn533_type_b_sens_res sensb_res;
1180 u8 attrib_res_len;
1181 u8 attrib_res[];
1182} __packed;
1183
1184static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1185 int target_data_len)
1186{
1187 if (target_data_len < sizeof(struct pn533_target_type_b))
1188 return false;
1189
1190 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1191 return false;
1192
1193 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1194 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1195 return false;
1196
1197 return true;
1198}
1199
1200static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1201 int tgt_data_len)
1202{
1203 struct pn533_target_type_b *tgt_type_b;
1204
37cf4fc6 1205 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1206
1207 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1208 return -EPROTO;
1209
01d719a2 1210 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1211
1212 return 0;
1213}
1214
b5193e5d
WR		 1215static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1216 int tgdata_len)
c46ee386 1217{
c46ee386
AAJ		 1218 struct nfc_target nfc_tgt;
1219 int rc;
1220
1221 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1222 dev->poll_mod_curr);
c46ee386 1223
b5193e5d 1224 if (tg != 1)
c46ee386
AAJ		 1225 return -EPROTO;
1226
98b3ac1b
SO		 1227 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1228
c46ee386
AAJ		 1229 switch (dev->poll_mod_curr) {
1230 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1231 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1232 break;
1233 case PN533_POLL_MOD_212KBPS_FELICA:
1234 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1235 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1236 break;
1237 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1238 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1239 break;
1240 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1241 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1242 break;
1243 default:
b5193e5d
WR		 1244 nfc_dev_err(&dev->interface->dev,
1245 "Unknown current poll modulation");
c46ee386
AAJ		 1246 return -EPROTO;
1247 }
1248
1249 if (rc)
1250 return rc;
1251
1252 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1253 nfc_dev_dbg(&dev->interface->dev,
1254 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1255 return -EAGAIN;
1256 }
1257
b5193e5d
WR		 1258 nfc_dev_dbg(&dev->interface->dev,
1259 "Target found - supported protocols: 0x%x",
1260 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1261
1262 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1263
1264 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1265
1266 return 0;
1267}
1268
6fbbdc16
SO		 1269static inline void pn533_poll_next_mod(struct pn533 *dev)
1270{
1271 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1272}
1273
c46ee386
AAJ		 1274static void pn533_poll_reset_mod_list(struct pn533 *dev)
1275{
1276 dev->poll_mod_count = 0;
1277}
1278
1279static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1280{
1281 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1282 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1283 dev->poll_mod_count++;
1284}
1285
6fbbdc16
SO		 1286static void pn533_poll_create_mod_list(struct pn533 *dev,
1287 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1288{
1289 pn533_poll_reset_mod_list(dev);
1290
b08e8603
WR		 1291 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1292 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1293 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1294 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1295
b08e8603
WR		 1296 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1297 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1298 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1299 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1300 }
1301
6fbbdc16 1302 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1303 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1304
01d719a2 1305 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1306 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1307
6fbbdc16
SO		 1308 if (tm_protocols)
1309 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1310}
1311
b5193e5d 1312static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1313{
b5193e5d
WR		 1314 u8 nbtg, tg, *tgdata;
1315 int rc, tgdata_len;
c46ee386
AAJ		 1316
1317 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1318
b5193e5d
WR		 1319 nbtg = resp->data[0];
1320 tg = resp->data[1];
1321 tgdata = &resp->data[2];
1322 tgdata_len = resp->len - 2; /* nbtg + tg */
1323
1324 if (nbtg) {
1325 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1326
1327 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1328 if (rc == 0) {
1329 pn533_poll_reset_mod_list(dev);
1330 return 0;
1331 }
c46ee386
AAJ		 1332 }
1333
6fbbdc16 1334 return -EAGAIN;
c46ee386
AAJ		 1335}
1336
9e2d493e 1337static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1338{
b5193e5d
WR		 1339 struct sk_buff *skb;
1340 u8 *felica, *nfcid3, *gb;
1341
9e2d493e
WR		 1342 u8 *gbytes = dev->gb;
1343 size_t gbytes_len = dev->gb_len;
1344
51d9e803
SO		 1345 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1346 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1347 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1348 0xff, 0xff}; /* System code */
b5193e5d 1349
51d9e803
SO		 1350 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1351 0x0, 0x0, 0x0,
1352 0x40}; /* SEL_RES for DEP */
ad3823ce 1353
b5193e5d
WR		 1354 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1355 felica (18), nfcid3 (10), gb_len (1) */
1356 gbytes_len +
1357 1; /* len Tk*/
ad3823ce 1358
9e2d493e 1359 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1360 if (!skb)
1361 return NULL;
ad3823ce
SO		 1362
1363 /* DEP support only */
52f2eaee 1364 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1365
1366 /* MIFARE params */
1367 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1368
1369 /* Felica params */
b5193e5d
WR		 1370 felica = skb_put(skb, 18);
1371 memcpy(felica, felica_params, 18);
1372 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1373
1374 /* NFCID3 */
b5193e5d
WR		 1375 nfcid3 = skb_put(skb, 10);
1376 memset(nfcid3, 0, 10);
1377 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1378
1379 /* General bytes */
b5193e5d 1380 *skb_put(skb, 1) = gbytes_len;
51d9e803 1381
b5193e5d
WR		 1382 gb = skb_put(skb, gbytes_len);
1383 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1384
b5193e5d
WR		 1385 /* Len Tk */
1386 *skb_put(skb, 1) = 0;
51d9e803 1387
b5193e5d 1388 return skb;
ad3823ce
SO		 1389}
1390
b1bb290a 1391#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1392#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1393static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1394 struct sk_buff *resp)
103b34cf 1395{
e4878823 1396 u8 status;
103b34cf
SO		 1397
1398 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1399
e4878823
WR		 1400 if (IS_ERR(resp))
1401 return PTR_ERR(resp);
103b34cf 1402
e4878823
WR		 1403 status = resp->data[0];
1404 skb_pull(resp, sizeof(status));
103b34cf 1405
e4878823 1406 if (status != 0) {
103b34cf 1407 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1408 dev->tgt_mode = 0;
e4878823 1409 dev_kfree_skb(resp);
103b34cf
SO		 1410 return 0;
1411 }
1412
e4878823 1413 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1414}
1415
1416static void pn533_wq_tg_get_data(struct work_struct *work)
1417{
1418 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1419
e4878823
WR		 1420 struct sk_buff *skb;
1421 int rc;
103b34cf 1422
e4878823 1423 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1424
9e2d493e 1425 skb = pn533_alloc_skb(dev, 0);
e4878823 1426 if (!skb)
103b34cf
SO		 1427 return;
1428
e4878823
WR		 1429 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1430 pn533_tm_get_data_complete, NULL);
103b34cf 1431
e4878823
WR		 1432 if (rc < 0)
1433 dev_kfree_skb(skb);
103b34cf
SO		 1434
1435 return;
1436}
1437
fc40a8c1 1438#define ATR_REQ_GB_OFFSET 17
b5193e5d 1439static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1440{
b5193e5d 1441 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1442 size_t gb_len;
103b34cf 1443 int rc;
ad3823ce
SO		 1444
1445 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1446
b5193e5d 1447 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1448 return -EINVAL;
1449
b5193e5d
WR		 1450 mode = resp->data[0];
1451 cmd = &resp->data[1];
ad3823ce 1452
b5193e5d
WR		 1453 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1454 mode, resp->len);
ad3823ce 1455
b5193e5d
WR		 1456 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1457 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1458 comm_mode = NFC_COMM_ACTIVE;
1459
b5193e5d 1460 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1461 return -EOPNOTSUPP;
1462
b5193e5d
WR		 1463 gb = cmd + ATR_REQ_GB_OFFSET;
1464 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1465
103b34cf
SO		 1466 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1467 comm_mode, gb, gb_len);
1468 if (rc < 0) {
1469 nfc_dev_err(&dev->interface->dev,
1470 "Error when signaling target activation");
1471 return rc;
1472 }
1473
51ad304c 1474 dev->tgt_mode = 1;
103b34cf
SO		 1475 queue_work(dev->wq, &dev->tg_work);
1476
1477 return 0;
fe7c5800
SO		 1478}
1479
6fbbdc16 1480static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1481{
37cf4fc6 1482 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1483
1484 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1485
1486 /* An ack will cancel the last issued command (poll) */
1487 pn533_send_ack(dev, GFP_ATOMIC);
1488
1489 dev->cancel_listen = 1;
1490
6fbbdc16
SO		 1491 pn533_poll_next_mod(dev);
1492
1493 queue_work(dev->wq, &dev->poll_work);
1494}
1495
1496static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1497 struct sk_buff *resp)
6fbbdc16
SO		 1498{
1499 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1500 int rc;
1501
6fbbdc16 1502 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1503
b5193e5d
WR		 1504 if (IS_ERR(resp)) {
1505 rc = PTR_ERR(resp);
1506
1507 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1508 __func__, rc);
1509
1510 if (rc == -ENOENT) {
1511 if (dev->poll_mod_count != 0)
1512 return rc;
1513 else
1514 goto stop_poll;
1515 } else if (rc < 0) {
1516 nfc_dev_err(&dev->interface->dev,
1517 "Error %d when running poll", rc);
1518 goto stop_poll;
1519 }
6fbbdc16 1520 }
ad3823ce 1521
6fbbdc16
SO		 1522 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1523
b5193e5d 1524 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1525 del_timer(&dev->listen_timer);
b5193e5d
WR		 1526 rc = pn533_init_target_complete(dev, resp);
1527 goto done;
6fbbdc16
SO		 1528 }
1529
b5193e5d
WR		 1530 /* Initiator mode */
1531 rc = pn533_start_poll_complete(dev, resp);
1532 if (!rc)
1533 goto done;
6fbbdc16 1534
95cb9e10
WR		 1535 if (!dev->poll_mod_count) {
1536 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1537 goto done;
1538 }
1539
b5193e5d 1540 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1541 queue_work(dev->wq, &dev->poll_work);
1542
b5193e5d
WR		 1543done:
1544 dev_kfree_skb(resp);
1545 return rc;
6fbbdc16
SO		 1546
1547stop_poll:
b5193e5d
WR		 1548 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1549
6fbbdc16
SO		 1550 pn533_poll_reset_mod_list(dev);
1551 dev->poll_protocols = 0;
b5193e5d 1552 return rc;
ad3823ce
SO		 1553}
1554
9e2d493e
WR		 1555static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1556 struct pn533_poll_modulations *mod)
c46ee386 1557{
b5193e5d 1558 struct sk_buff *skb;
c46ee386 1559
9e2d493e 1560 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1561 if (!skb)
1562 return NULL;
c46ee386 1563
b5193e5d 1564 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1565
b5193e5d 1566 return skb;
6fbbdc16 1567}
c46ee386 1568
6fbbdc16
SO		 1569static int pn533_send_poll_frame(struct pn533 *dev)
1570{
b5193e5d
WR		 1571 struct pn533_poll_modulations *mod;
1572 struct sk_buff *skb;
6fbbdc16 1573 int rc;
b5193e5d 1574 u8 cmd_code;
c46ee386 1575
b5193e5d 1576 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1577
b5193e5d
WR		 1578 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1579 __func__, mod->len);
c46ee386 1580
b5193e5d
WR		 1581 if (mod->len == 0) { /* Listen mode */
1582 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1583 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1584 } else { /* Polling mode */
1585 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1586 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1587 }
1588
1589 if (!skb) {
1590 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1591 return -ENOMEM;
1592 }
1593
1594 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1595 NULL);
1596 if (rc < 0) {
1597 dev_kfree_skb(skb);
6fbbdc16 1598 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1599 }
c46ee386 1600
6fbbdc16
SO		 1601 return rc;
1602}
1603
1604static void pn533_wq_poll(struct work_struct *work)
1605{
1606 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1607 struct pn533_poll_modulations *cur_mod;
1608 int rc;
1609
1610 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1611
1612 nfc_dev_dbg(&dev->interface->dev,
1613 "%s cancel_listen %d modulation len %d",
1614 __func__, dev->cancel_listen, cur_mod->len);
1615
1616 if (dev->cancel_listen == 1) {
1617 dev->cancel_listen = 0;
1618 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1619 }
1620
6fbbdc16
SO		 1621 rc = pn533_send_poll_frame(dev);
1622 if (rc)
1623 return;
c46ee386 1624
6fbbdc16
SO		 1625 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1626 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1627
6fbbdc16 1628 return;
c46ee386
AAJ		 1629}
1630
fe7c5800
SO		 1631static int pn533_start_poll(struct nfc_dev *nfc_dev,
1632 u32 im_protocols, u32 tm_protocols)
1633{
1634 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1635
1636 nfc_dev_dbg(&dev->interface->dev,
1637 "%s: im protocols 0x%x tm protocols 0x%x",
1638 __func__, im_protocols, tm_protocols);
1639
1640 if (dev->tgt_active_prot) {
1641 nfc_dev_err(&dev->interface->dev,
1642 "Cannot poll with a target already activated");
1643 return -EBUSY;
1644 }
1645
51ad304c
SO		 1646 if (dev->tgt_mode) {
1647 nfc_dev_err(&dev->interface->dev,
1648 "Cannot poll while already being activated");
1649 return -EBUSY;
1650 }
1651
6fbbdc16
SO		 1652 if (tm_protocols) {
1653 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1654 if (dev->gb == NULL)
1655 tm_protocols = 0;
1656 }
ad3823ce 1657
6fbbdc16
SO		 1658 dev->poll_mod_curr = 0;
1659 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1660 dev->poll_protocols = im_protocols;
1661 dev->listen_protocols = tm_protocols;
ad3823ce 1662
6fbbdc16 1663 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1664}
1665
c46ee386
AAJ		 1666static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1667{
1668 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1669
1670 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1671
6fbbdc16
SO		 1672 del_timer(&dev->listen_timer);
1673
c46ee386 1674 if (!dev->poll_mod_count) {
6ca55372
WR		 1675 nfc_dev_dbg(&dev->interface->dev,
1676 "Polling operation was not running");
c46ee386
AAJ		 1677 return;
1678 }
1679
1680 /* An ack will cancel the last issued command (poll) */
1681 pn533_send_ack(dev, GFP_KERNEL);
1682
1683 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1684 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1685
1686 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1687}
1688
1689static int pn533_activate_target_nfcdep(struct pn533 *dev)
1690{
cb950d93 1691 struct pn533_cmd_activate_response *rsp;
541d920b 1692 u16 gt_len;
c46ee386
AAJ		 1693 int rc;
1694
cb950d93
WR		 1695 struct sk_buff *skb;
1696 struct sk_buff *resp;
c46ee386 1697
cb950d93 1698 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1699
9e2d493e 1700 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1701 if (!skb)
1702 return -ENOMEM;
c46ee386 1703
cb950d93
WR		 1704 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1705 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1706
cb950d93
WR		 1707 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1708 if (IS_ERR(resp))
1709 return PTR_ERR(resp);
c46ee386 1710
37cf4fc6 1711 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1712 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1713 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1714 nfc_dev_err(&dev->interface->dev,
1715 "Target activation failed (error 0x%x)", rc);
cb950d93 1716 dev_kfree_skb(resp);
c46ee386 1717 return -EIO;
8a0ecfe7 1718 }
c46ee386 1719
541d920b 1720 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1721 gt_len = resp->len - 16;
1722 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1723
cb950d93 1724 dev_kfree_skb(resp);
541d920b 1725 return rc;
c46ee386
AAJ		 1726}
1727
90099433
EL		 1728static int pn533_activate_target(struct nfc_dev *nfc_dev,
1729 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1730{
1731 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1732 int rc;
1733
1734 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1735 protocol);
c46ee386
AAJ		 1736
1737 if (dev->poll_mod_count) {
6ca55372
WR		 1738 nfc_dev_err(&dev->interface->dev,
1739 "Cannot activate while polling");
c46ee386
AAJ		 1740 return -EBUSY;
1741 }
1742
1743 if (dev->tgt_active_prot) {
6ca55372
WR		 1744 nfc_dev_err(&dev->interface->dev,
1745 "There is already an active target");
c46ee386
AAJ		 1746 return -EBUSY;
1747 }
1748
1749 if (!dev->tgt_available_prots) {
6ca55372
WR		 1750 nfc_dev_err(&dev->interface->dev,
1751 "There is no available target to activate");
c46ee386
AAJ		 1752 return -EINVAL;
1753 }
1754
1755 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1756 nfc_dev_err(&dev->interface->dev,
1757 "Target doesn't support requested proto %u",
1758 protocol);
c46ee386
AAJ		 1759 return -EINVAL;
1760 }
1761
1762 if (protocol == NFC_PROTO_NFC_DEP) {
1763 rc = pn533_activate_target_nfcdep(dev);
1764 if (rc) {
6ca55372
WR		 1765 nfc_dev_err(&dev->interface->dev,
1766 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1767 return rc;
1768 }
1769 }
1770
1771 dev->tgt_active_prot = protocol;
1772 dev->tgt_available_prots = 0;
1773
1774 return 0;
1775}
1776
90099433
EL		 1777static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1778 struct nfc_target *target)
c46ee386
AAJ		 1779{
1780 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1781
1782 struct sk_buff *skb;
1783 struct sk_buff *resp;
1784
c46ee386
AAJ		 1785 int rc;
1786
1787 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1788
1789 if (!dev->tgt_active_prot) {
1790 nfc_dev_err(&dev->interface->dev, "There is no active target");
1791 return;
1792 }
1793
1794 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1795 skb_queue_purge(&dev->resp_q);
1796
9e2d493e 1797 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1798 if (!skb)
1799 return;
c46ee386 1800
cb950d93 1801 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1802
cb950d93
WR		 1803 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1804 if (IS_ERR(resp))
c46ee386 1805 return;
c46ee386 1806
cb950d93 1807 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1808 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1809 nfc_dev_err(&dev->interface->dev,
1810 "Error 0x%x when releasing the target", rc);
c46ee386 1811
cb950d93 1812 dev_kfree_skb(resp);
c46ee386
AAJ		 1813 return;
1814}
1815
361f3cb7
SO		 1816
1817static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1818 struct sk_buff *resp)
361f3cb7 1819{
13003649 1820 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1821 u8 target_gt_len;
1822 int rc;
13003649 1823 u8 active = *(u8 *)arg;
70418e6e
WR		 1824
1825 kfree(arg);
361f3cb7 1826
13003649
WR		 1827 if (IS_ERR(resp))
1828 return PTR_ERR(resp);
361f3cb7
SO		 1829
1830 if (dev->tgt_available_prots &&
1831 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1832 nfc_dev_err(&dev->interface->dev,
5d467742 1833 "The target does not support DEP");
13003649
WR		 1834 rc = -EINVAL;
1835 goto error;
361f3cb7
SO		 1836 }
1837
13003649
WR		 1838 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1839
1840 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1841 if (rc != PN533_CMD_RET_SUCCESS) {
1842 nfc_dev_err(&dev->interface->dev,
a45e1c8d 1843 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 1844 goto error;
361f3cb7
SO		 1845 }
1846
1847 if (!dev->tgt_available_prots) {
13003649
WR		 1848 struct nfc_target nfc_target;
1849
361f3cb7
SO		 1850 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1851
1852 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1853 nfc_target.nfcid1_len = 10;
13003649 1854 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1855 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1856 if (rc)
13003649 1857 goto error;
361f3cb7
SO		 1858
1859 dev->tgt_available_prots = 0;
1860 }
1861
1862 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1863
1864 /* ATR_RES general bytes are located at offset 17 */
13003649 1865 target_gt_len = resp->len - 17;
361f3cb7 1866 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1867 rsp->gt, target_gt_len);
361f3cb7
SO		 1868 if (rc == 0)
1869 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1870 dev->nfc_dev->targets[0].idx,
1871 !active, NFC_RF_INITIATOR);
361f3cb7 1872
13003649
WR		 1873error:
1874 dev_kfree_skb(resp);
1875 return rc;
361f3cb7
SO		 1876}
1877
41a8ec49
SO		 1878static int pn533_mod_to_baud(struct pn533 *dev)
1879{
1880 switch (dev->poll_mod_curr) {
1881 case PN533_POLL_MOD_106KBPS_A:
1882 return 0;
1883 case PN533_POLL_MOD_212KBPS_FELICA:
1884 return 1;
1885 case PN533_POLL_MOD_424KBPS_FELICA:
1886 return 2;
1887 default:
1888 return -EINVAL;
1889 }
1890}
1891
d7f3345d 1892#define PASSIVE_DATA_LEN 5
90099433 1893static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1894 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1895{
1896 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 1897 struct sk_buff *skb;
1898 int rc, baud, skb_len;
1899 u8 *next, *arg;
1900
d7f3345d 1901 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 1902
1903 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1904
361f3cb7
SO		 1905 if (dev->poll_mod_count) {
1906 nfc_dev_err(&dev->interface->dev,
5d467742 1907 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 1908 return -EBUSY;
1909 }
1910
1911 if (dev->tgt_active_prot) {
1912 nfc_dev_err(&dev->interface->dev,
5d467742 1913 "There is already an active target");
361f3cb7
SO		 1914 return -EBUSY;
1915 }
1916
41a8ec49
SO		 1917 baud = pn533_mod_to_baud(dev);
1918 if (baud < 0) {
1919 nfc_dev_err(&dev->interface->dev,
1920 "Invalid curr modulation %d", dev->poll_mod_curr);
1921 return baud;
1922 }
1923
13003649 1924 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 1925 if (comm_mode == NFC_COMM_PASSIVE)
13003649 1926 skb_len += PASSIVE_DATA_LEN;
d7f3345d 1927
9e2d493e 1928 skb = pn533_alloc_skb(dev, skb_len);
13003649 1929 if (!skb)
361f3cb7
SO		 1930 return -ENOMEM;
1931
13003649
WR		 1932 *skb_put(skb, 1) = !comm_mode; /* ActPass */
1933 *skb_put(skb, 1) = baud; /* Baud rate */
1934
1935 next = skb_put(skb, 1); /* Next */
1936 *next = 0;
361f3cb7 1937
13003649
WR		 1938 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
1939 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
1940 PASSIVE_DATA_LEN);
1941 *next |= 1;
d7f3345d
SO		 1942 }
1943
47807d3d 1944 if (gb != NULL && gb_len > 0) {
13003649
WR		 1945 memcpy(skb_put(skb, gb_len), gb, gb_len);
1946 *next |= 4; /* We have some Gi */
361f3cb7 1947 } else {
13003649 1948 *next = 0;
361f3cb7
SO		 1949 }
1950
13003649
WR		 1951 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1952 if (!arg) {
1953 dev_kfree_skb(skb);
1954 return -ENOMEM;
1955 }
361f3cb7 1956
13003649 1957 *arg = !comm_mode;
361f3cb7 1958
13003649
WR		 1959 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1960 pn533_in_dep_link_up_complete, arg);
1961
1962 if (rc < 0) {
1963 dev_kfree_skb(skb);
1964 kfree(arg);
1965 }
361f3cb7
SO		 1966
1967 return rc;
1968}
1969
1970static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1971{
6fbbdc16
SO		 1972 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1973
fcfafc76
WR		 1974 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1975
6fbbdc16
SO		 1976 pn533_poll_reset_mod_list(dev);
1977
51ad304c
SO		 1978 if (dev->tgt_mode || dev->tgt_active_prot) {
1979 pn533_send_ack(dev, GFP_KERNEL);
1980 usb_kill_urb(dev->in_urb);
1981 }
1982
1983 dev->tgt_active_prot = 0;
1984 dev->tgt_mode = 0;
1985
1986 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 1987
1988 return 0;
1989}
1990
c46ee386 1991struct pn533_data_exchange_arg {
c46ee386
AAJ		 1992 data_exchange_cb_t cb;
1993 void *cb_context;
1994};
1995
6ff73fd2
SO		 1996static struct sk_buff *pn533_build_response(struct pn533 *dev)
1997{
1998 struct sk_buff *skb, *tmp, *t;
1999 unsigned int skb_len = 0, tmp_len = 0;
2000
fcfafc76 2001 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
6ff73fd2
SO		 2002
2003 if (skb_queue_empty(&dev->resp_q))
2004 return NULL;
2005
2006 if (skb_queue_len(&dev->resp_q) == 1) {
2007 skb = skb_dequeue(&dev->resp_q);
2008 goto out;
2009 }
2010
2011 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2012 skb_len += tmp->len;
2013
2014 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2015 __func__, skb_len);
2016
2017 skb = alloc_skb(skb_len, GFP_KERNEL);
2018 if (skb == NULL)
2019 goto out;
2020
2021 skb_put(skb, skb_len);
2022
2023 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2024 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2025 tmp_len += tmp->len;
2026 }
2027
2028out:
2029 skb_queue_purge(&dev->resp_q);
2030
2031 return skb;
2032}
2033
c46ee386 2034static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2035 struct sk_buff *resp)
c46ee386
AAJ		 2036{
2037 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2038 struct sk_buff *skb;
2039 int rc = 0;
2040 u8 status, ret, mi;
c46ee386
AAJ		 2041
2042 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2043
b1e666f5
WR		 2044 if (IS_ERR(resp)) {
2045 rc = PTR_ERR(resp);
2046 goto _error;
c46ee386
AAJ		 2047 }
2048
b1e666f5
WR		 2049 status = resp->data[0];
2050 ret = status & PN533_CMD_RET_MASK;
2051 mi = status & PN533_CMD_MI_MASK;
2052
2053 skb_pull(resp, sizeof(status));
c46ee386 2054
b1e666f5
WR		 2055 if (ret != PN533_CMD_RET_SUCCESS) {
2056 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2057 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2058 rc = -EIO;
c46ee386
AAJ		 2059 goto error;
2060 }
2061
b1e666f5 2062 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2063
b1e666f5
WR		 2064 if (mi) {
2065 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2066 queue_work(dev->wq, &dev->mi_work);
2067 return -EINPROGRESS;
c46ee386
AAJ		 2068 }
2069
6ff73fd2 2070 skb = pn533_build_response(dev);
b1e666f5 2071 if (!skb)
6ff73fd2 2072 goto error;
c46ee386 2073
6ff73fd2 2074 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2075 kfree(arg);
2076 return 0;
2077
2078error:
b1e666f5
WR		 2079 dev_kfree_skb(resp);
2080_error:
6ff73fd2 2081 skb_queue_purge(&dev->resp_q);
b1e666f5 2082 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2083 kfree(arg);
b1e666f5 2084 return rc;
c46ee386
AAJ		 2085}
2086
be9ae4ce
SO		 2087static int pn533_transceive(struct nfc_dev *nfc_dev,
2088 struct nfc_target *target, struct sk_buff *skb,
2089 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2090{
2091 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2092 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2093 int rc;
2094
2095 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2096
b1e666f5
WR		 2097 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2098 /* TODO: Implement support to multi-part data exchange */
2099 nfc_dev_err(&dev->interface->dev,
2100 "Data length greater than the max allowed: %d",
2101 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2102 rc = -ENOSYS;
2103 goto error;
2104 }
2105
c46ee386 2106 if (!dev->tgt_active_prot) {
6ca55372
WR		 2107 nfc_dev_err(&dev->interface->dev,
2108 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2109 rc = -EINVAL;
2110 goto error;
2111 }
2112
b1e666f5 2113 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2114 if (!arg) {
2115 rc = -ENOMEM;
b1e666f5 2116 goto error;
c46ee386
AAJ		 2117 }
2118
c46ee386
AAJ		 2119 arg->cb = cb;
2120 arg->cb_context = cb_context;
2121
b1e666f5
WR		 2122 switch (dev->device_type) {
2123 case PN533_DEVICE_PASORI:
2124 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2125 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2126 skb,
2127 pn533_data_exchange_complete,
2128 arg);
2129
2130 break;
2131 }
2132 default:
2133 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2134
2135 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2136 skb, pn533_data_exchange_complete,
2137 arg);
2138
2139 break;
c46ee386
AAJ		 2140 }
2141
b1e666f5
WR		 2142 if (rc < 0) /* rc from send_async */
2143 goto error;
2144
c46ee386
AAJ		 2145 return 0;
2146
c46ee386 2147error:
b1e666f5
WR		 2148 kfree(arg);
2149 dev_kfree_skb(skb);
c46ee386
AAJ		 2150 return rc;
2151}
2152
dadb06f2 2153static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2154 struct sk_buff *resp)
dadb06f2 2155{
e4878823 2156 u8 status;
5b412fd1 2157
dadb06f2
SO		 2158 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2159
e4878823
WR		 2160 if (IS_ERR(resp))
2161 return PTR_ERR(resp);
5b412fd1 2162
e4878823 2163 status = resp->data[0];
dadb06f2 2164
e4878823 2165 dev_kfree_skb(resp);
dadb06f2 2166
e4878823 2167 if (status != 0) {
dadb06f2
SO		 2168 nfc_tm_deactivated(dev->nfc_dev);
2169
51ad304c
SO		 2170 dev->tgt_mode = 0;
2171
dadb06f2
SO		 2172 return 0;
2173 }
2174
2175 queue_work(dev->wq, &dev->tg_work);
2176
2177 return 0;
2178}
2179
2180static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2181{
2182 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2183 int rc;
2184
2185 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2186
e4878823 2187 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2188 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2189 "Data length greater than the max allowed: %d",
2190 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2191 return -ENOSYS;
dadb06f2
SO		 2192 }
2193
e4878823
WR		 2194 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2195 pn533_tm_send_complete, NULL);
2196 if (rc < 0)
2197 dev_kfree_skb(skb);
dadb06f2
SO		 2198
2199 return rc;
2200}
2201
6ff73fd2
SO		 2202static void pn533_wq_mi_recv(struct work_struct *work)
2203{
2204 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2205
2206 struct sk_buff *skb;
6ff73fd2
SO		 2207 int rc;
2208
2209 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2210
9e2d493e 2211 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2212 if (!skb)
2213 goto error;
6ff73fd2 2214
b1e666f5
WR		 2215 switch (dev->device_type) {
2216 case PN533_DEVICE_PASORI:
2217 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2218 rc = pn533_send_cmd_direct_async(dev,
2219 PN533_CMD_IN_COMM_THRU,
2220 skb,
2221 pn533_data_exchange_complete,
2222 dev->cmd_complete_mi_arg);
6ff73fd2 2223
b1e666f5
WR		 2224 break;
2225 }
2226 default:
2227 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2228
b1e666f5
WR		 2229 rc = pn533_send_cmd_direct_async(dev,
2230 PN533_CMD_IN_DATA_EXCHANGE,
2231 skb,
2232 pn533_data_exchange_complete,
2233 dev->cmd_complete_mi_arg);
b1bb290a 2234
b1e666f5 2235 break;
6ff73fd2
SO		 2236 }
2237
b1e666f5 2238 if (rc == 0) /* success */
6ff73fd2
SO		 2239 return;
2240
b1e666f5
WR		 2241 nfc_dev_err(&dev->interface->dev,
2242 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2243
b1e666f5 2244 dev_kfree_skb(skb);
140ef7f6 2245 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2246
b1e666f5 2247error:
6ff73fd2 2248 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2249 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2250}
2251
c46ee386
AAJ		 2252static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2253 u8 cfgdata_len)
2254{
cb950d93
WR		 2255 struct sk_buff *skb;
2256 struct sk_buff *resp;
2257
2258 int skb_len;
c46ee386
AAJ		 2259
2260 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2261
cb950d93 2262 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2263
9e2d493e 2264 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2265 if (!skb)
2266 return -ENOMEM;
c46ee386 2267
cb950d93
WR		 2268 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2269 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2270
cb950d93
WR		 2271 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2272 if (IS_ERR(resp))
2273 return PTR_ERR(resp);
c46ee386 2274
cb950d93
WR		 2275 dev_kfree_skb(resp);
2276 return 0;
2277}
2278
2279static int pn533_get_firmware_version(struct pn533 *dev,
2280 struct pn533_fw_version *fv)
2281{
2282 struct sk_buff *skb;
2283 struct sk_buff *resp;
2284
9e2d493e 2285 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2286 if (!skb)
2287 return -ENOMEM;
2288
2289 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2290 if (IS_ERR(resp))
2291 return PTR_ERR(resp);
2292
2293 fv->ic = resp->data[0];
2294 fv->ver = resp->data[1];
2295 fv->rev = resp->data[2];
2296 fv->support = resp->data[3];
2297
2298 dev_kfree_skb(resp);
2299 return 0;
c46ee386
AAJ		 2300}
2301
f75c2913 2302static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2303{
cb950d93
WR		 2304 struct sk_buff *skb;
2305 struct sk_buff *resp;
5c7b0531
SO		 2306
2307 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2308
9e2d493e 2309 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2310 if (!skb)
2311 return -ENOMEM;
5c7b0531 2312
cb950d93 2313 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2314
cb950d93
WR		 2315 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2316 if (IS_ERR(resp))
2317 return PTR_ERR(resp);
5c7b0531 2318
cb950d93 2319 dev_kfree_skb(resp);
5c7b0531 2320
94c5c156 2321 return 0;
5c7b0531
SO		 2322}
2323
2324static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2325 .dev_up = NULL,
2326 .dev_down = NULL,
361f3cb7
SO		 2327 .dep_link_up = pn533_dep_link_up,
2328 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2329 .start_poll = pn533_start_poll,
2330 .stop_poll = pn533_stop_poll,
2331 .activate_target = pn533_activate_target,
2332 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2333 .im_transceive = pn533_transceive,
dadb06f2 2334 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2335};
2336
5c7b0531
SO		 2337static int pn533_setup(struct pn533 *dev)
2338{
2339 struct pn533_config_max_retries max_retries;
2340 struct pn533_config_timing timing;
2341 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2342 int rc;
2343
2344 switch (dev->device_type) {
2345 case PN533_DEVICE_STD:
2346 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2347 max_retries.mx_rty_psl = 2;
2348 max_retries.mx_rty_passive_act =
2349 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2350
2351 timing.rfu = PN533_CONFIG_TIMING_102;
2352 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2353 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2354
2355 break;
2356
2357 case PN533_DEVICE_PASORI:
2358 max_retries.mx_rty_atr = 0x2;
2359 max_retries.mx_rty_psl = 0x1;
2360 max_retries.mx_rty_passive_act =
2361 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2362
2363 timing.rfu = PN533_CONFIG_TIMING_102;
2364 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2365 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2366
2367 break;
2368
2369 default:
2370 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2371 dev->device_type);
2372 return -EINVAL;
2373 }
2374
2375 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2376 (u8 *)&max_retries, sizeof(max_retries));
2377 if (rc) {
2378 nfc_dev_err(&dev->interface->dev,
2379 "Error on setting MAX_RETRIES config");
2380 return rc;
2381 }
2382
2383
2384 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2385 (u8 *)&timing, sizeof(timing));
2386 if (rc) {
2387 nfc_dev_err(&dev->interface->dev,
2388 "Error on setting RF timings");
2389 return rc;
2390 }
2391
2392 switch (dev->device_type) {
2393 case PN533_DEVICE_STD:
2394 break;
2395
2396 case PN533_DEVICE_PASORI:
f75c2913 2397 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2398
2399 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2400 pasori_cfg, 3);
2401 if (rc) {
2402 nfc_dev_err(&dev->interface->dev,
2403 "Error while settings PASORI config");
2404 return rc;
2405 }
2406
f75c2913 2407 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2408
2409 break;
2410 }
2411
2412 return 0;
2413}
2414
c46ee386
AAJ		 2415static int pn533_probe(struct usb_interface *interface,
2416 const struct usb_device_id *id)
2417{
cb950d93 2418 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2419 struct pn533 *dev;
2420 struct usb_host_interface *iface_desc;
2421 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2422 int in_endpoint = 0;
2423 int out_endpoint = 0;
2424 int rc = -ENOMEM;
2425 int i;
2426 u32 protocols;
2427
2428 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2429 if (!dev)
2430 return -ENOMEM;
2431
2432 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2433 dev->interface = interface;
0201ed03 2434 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2435
2436 iface_desc = interface->cur_altsetting;
2437 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2438 endpoint = &iface_desc->endpoint[i].desc;
2439
8d25ca79 2440 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2441 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2442
8d25ca79 2443 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2444 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2445 }
2446
2447 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2448 nfc_dev_err(&interface->dev,
2449 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2450 rc = -ENODEV;
2451 goto error;
2452 }
2453
c46ee386 2454 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2455 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2456
a5798094 2457 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2458 goto error;
2459
2460 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2461 usb_rcvbulkpipe(dev->udev, in_endpoint),
2462 NULL, 0, NULL, dev);
c46ee386 2463 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2464 usb_sndbulkpipe(dev->udev, out_endpoint),
2465 NULL, 0, pn533_send_complete, dev);
c46ee386 2466
5d50b364
SO		 2467 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2468 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2469 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2470 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2471 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2472 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2473 if (dev->wq == NULL)
2474 goto error;
c46ee386 2475
6fbbdc16
SO		 2476 init_timer(&dev->listen_timer);
2477 dev->listen_timer.data = (unsigned long) dev;
2478 dev->listen_timer.function = pn533_listen_mode_timer;
2479
6ff73fd2
SO		 2480 skb_queue_head_init(&dev->resp_q);
2481
5d50b364
SO		 2482 INIT_LIST_HEAD(&dev->cmd_queue);
2483
c46ee386
AAJ		 2484 usb_set_intfdata(interface, dev);
2485
9e2d493e 2486 dev->ops = &pn533_std_frame_ops;
c46ee386 2487
5c7b0531
SO		 2488 dev->device_type = id->driver_info;
2489 switch (dev->device_type) {
2490 case PN533_DEVICE_STD:
2491 protocols = PN533_ALL_PROTOCOLS;
2492 break;
2493
2494 case PN533_DEVICE_PASORI:
2495 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2496 break;
2497
2498 default:
2499 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2500 dev->device_type);
2501 rc = -EINVAL;
2502 goto destroy_wq;
2503 }
c46ee386 2504
9e2d493e
WR		 2505 memset(&fw_ver, 0, sizeof(fw_ver));
2506 rc = pn533_get_firmware_version(dev, &fw_ver);
2507 if (rc < 0)
2508 goto destroy_wq;
2509
2510 nfc_dev_info(&dev->interface->dev,
2511 "NXP PN533 firmware ver %d.%d now attached",
2512 fw_ver.ver, fw_ver.rev);
2513
2514
e8753043 2515 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
390a1bd8 2516 NFC_SE_NONE,
9e2d493e 2517 dev->ops->tx_header_len +
e8753043 2518 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2519 dev->ops->tx_tail_len);
c46ee386 2520 if (!dev->nfc_dev)
4849f85e 2521 goto destroy_wq;
c46ee386
AAJ		 2522
2523 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2524 nfc_set_drvdata(dev->nfc_dev, dev);
2525
2526 rc = nfc_register_device(dev->nfc_dev);
2527 if (rc)
2528 goto free_nfc_dev;
2529
5c7b0531
SO		 2530 rc = pn533_setup(dev);
2531 if (rc)
34a85bfc 2532 goto unregister_nfc_dev;
34a85bfc 2533
c46ee386
AAJ		 2534 return 0;
2535
9f2f8ba1
SO		 2536unregister_nfc_dev:
2537 nfc_unregister_device(dev->nfc_dev);
2538
c46ee386
AAJ		 2539free_nfc_dev:
2540 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2541
4849f85e
SO		 2542destroy_wq:
2543 destroy_workqueue(dev->wq);
c46ee386 2544error:
c46ee386 2545 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2546 usb_free_urb(dev->out_urb);
2547 kfree(dev);
2548 return rc;
2549}
2550
2551static void pn533_disconnect(struct usb_interface *interface)
2552{
2553 struct pn533 *dev;
5d50b364 2554 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2555
2556 dev = usb_get_intfdata(interface);
2557 usb_set_intfdata(interface, NULL);
2558
2559 nfc_unregister_device(dev->nfc_dev);
2560 nfc_free_device(dev->nfc_dev);
2561
2562 usb_kill_urb(dev->in_urb);
2563 usb_kill_urb(dev->out_urb);
2564
4849f85e 2565 destroy_workqueue(dev->wq);
c46ee386 2566
6ff73fd2
SO		 2567 skb_queue_purge(&dev->resp_q);
2568
6fbbdc16
SO		 2569 del_timer(&dev->listen_timer);
2570
5d50b364
SO		 2571 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2572 list_del(&cmd->queue);
2573 kfree(cmd);
2574 }
2575
c46ee386 2576 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 2577 usb_free_urb(dev->out_urb);
2578 kfree(dev);
2579
276556db 2580 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2581}
2582
2583static struct usb_driver pn533_driver = {
2584 .name = "pn533",
2585 .probe = pn533_probe,
2586 .disconnect = pn533_disconnect,
2587 .id_table = pn533_table,
2588};
2589
fe748483 2590module_usb_driver(pn533_driver);
c46ee386 2591
e70b96e9
WR		 2592MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2593MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2594MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 2595MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2596MODULE_VERSION(VERSION);
2597MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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