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c46ee386 1/*
9815c7cf
MT		 2 * Driver for NXP PN533 NFC Chip - core functions
3 *
c46ee386 4 * Copyright (C) 2011 Instituto Nokia de Tecnologia
e70b96e9 5 * Copyright (C) 2012-2013 Tieto Poland
c46ee386
AAJ		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
98b32dec 18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
c46ee386
AAJ		 19 */
20
21#include <linux/device.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/slab.h>
c46ee386
AAJ		 25#include <linux/nfc.h>
26#include <linux/netdevice.h>
55eb94f9 27#include <net/nfc/nfc.h>
9815c7cf 28#include "pn533.h"
c46ee386 29
9815c7cf 30#define VERSION "0.3"
c46ee386 31
6fbbdc16
SO		 32/* How much time we spend listening for initiators */
33#define PN533_LISTEN_TIME 2
46f793b0
SO		 34/* Delay between each poll frame (ms) */
35#define PN533_POLL_INTERVAL 10
6fbbdc16 36
c46ee386
AAJ		 37/* structs for pn533 commands */
38
39/* PN533_CMD_GET_FIRMWARE_VERSION */
40struct pn533_fw_version {
41 u8 ic;
42 u8 ver;
43 u8 rev;
44 u8 support;
45};
46
47/* PN533_CMD_RF_CONFIGURATION */
60d9edd5
SO		 48#define PN533_CFGITEM_RF_FIELD 0x01
49#define PN533_CFGITEM_TIMING 0x02
c46ee386 50#define PN533_CFGITEM_MAX_RETRIES 0x05
60d9edd5
SO		 51#define PN533_CFGITEM_PASORI 0x82
52
3a8eab39
SO		 53#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
54#define PN533_CFGITEM_RF_FIELD_ON 0x1
55#define PN533_CFGITEM_RF_FIELD_OFF 0x0
c46ee386 56
34a85bfc
SO		 57#define PN533_CONFIG_TIMING_102 0xb
58#define PN533_CONFIG_TIMING_204 0xc
59#define PN533_CONFIG_TIMING_409 0xd
60#define PN533_CONFIG_TIMING_819 0xe
61
c46ee386
AAJ		 62#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
63#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
64
65struct pn533_config_max_retries {
66 u8 mx_rty_atr;
67 u8 mx_rty_psl;
68 u8 mx_rty_passive_act;
69} __packed;
70
34a85bfc
SO		 71struct pn533_config_timing {
72 u8 rfu;
73 u8 atr_res_timeout;
74 u8 dep_timeout;
75} __packed;
76
c46ee386
AAJ		 77/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
78
79/* felica commands opcode */
80#define PN533_FELICA_OPC_SENSF_REQ 0
81#define PN533_FELICA_OPC_SENSF_RES 1
82/* felica SENSF_REQ parameters */
83#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
84#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
85#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
86#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
87
88/* type B initiator_data values */
89#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
90#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
91#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
92
93union pn533_cmd_poll_initdata {
94 struct {
95 u8 afi;
96 u8 polling_method;
97 } __packed type_b;
98 struct {
99 u8 opcode;
100 __be16 sc;
101 u8 rc;
102 u8 tsn;
103 } __packed felica;
104};
105
c46ee386
AAJ		 106struct pn533_poll_modulations {
107 struct {
108 u8 maxtg;
109 u8 brty;
110 union pn533_cmd_poll_initdata initiator_data;
111 } __packed data;
112 u8 len;
113};
114
ef3d56e1 115static const struct pn533_poll_modulations poll_mod[] = {
c46ee386
AAJ		 116 [PN533_POLL_MOD_106KBPS_A] = {
117 .data = {
118 .maxtg = 1,
119 .brty = 0,
120 },
121 .len = 2,
122 },
123 [PN533_POLL_MOD_212KBPS_FELICA] = {
124 .data = {
125 .maxtg = 1,
126 .brty = 1,
127 .initiator_data.felica = {
128 .opcode = PN533_FELICA_OPC_SENSF_REQ,
129 .sc = PN533_FELICA_SENSF_SC_ALL,
a94e10f7 130 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
31c44464 131 .tsn = 0x03,
c46ee386
AAJ		 132 },
133 },
134 .len = 7,
135 },
136 [PN533_POLL_MOD_424KBPS_FELICA] = {
137 .data = {
138 .maxtg = 1,
139 .brty = 2,
140 .initiator_data.felica = {
141 .opcode = PN533_FELICA_OPC_SENSF_REQ,
142 .sc = PN533_FELICA_SENSF_SC_ALL,
a94e10f7 143 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
31c44464 144 .tsn = 0x03,
c46ee386
AAJ		 145 },
146 },
147 .len = 7,
148 },
149 [PN533_POLL_MOD_106KBPS_JEWEL] = {
150 .data = {
151 .maxtg = 1,
152 .brty = 4,
153 },
154 .len = 2,
155 },
156 [PN533_POLL_MOD_847KBPS_B] = {
157 .data = {
158 .maxtg = 1,
159 .brty = 8,
160 .initiator_data.type_b = {
161 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
162 .polling_method =
163 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
164 },
165 },
166 .len = 3,
167 },
6fbbdc16
SO		 168 [PN533_LISTEN_MOD] = {
169 .len = 0,
170 },
c46ee386
AAJ		 171};
172
173/* PN533_CMD_IN_ATR */
174
c46ee386
AAJ		 175struct pn533_cmd_activate_response {
176 u8 status;
177 u8 nfcid3t[10];
178 u8 didt;
179 u8 bst;
180 u8 brt;
181 u8 to;
182 u8 ppt;
183 /* optional */
184 u8 gt[];
185} __packed;
186
361f3cb7
SO		 187struct pn533_cmd_jump_dep_response {
188 u8 status;
189 u8 tg;
190 u8 nfcid3t[10];
191 u8 didt;
192 u8 bst;
193 u8 brt;
194 u8 to;
195 u8 ppt;
196 /* optional */
197 u8 gt[];
198} __packed;
c46ee386 199
ad3823ce
SO		 200
201/* PN533_TG_INIT_AS_TARGET */
202#define PN533_INIT_TARGET_PASSIVE 0x1
203#define PN533_INIT_TARGET_DEP 0x2
204
fc40a8c1
SO		 205#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
206#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
207#define PN533_INIT_TARGET_RESP_DEP 0x4
208
1575b9d8
OG		 209/* The rule: value(high byte) + value(low byte) + checksum = 0 */
210static inline u8 pn533_ext_checksum(u16 value)
211{
212 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
213}
214
c46ee386 215/* The rule: value + checksum = 0 */
63123108 216static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 217{
218 return ~value + 1;
219}
220
221/* The rule: sum(data elements) + checksum = 0 */
63123108 222static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 223{
224 u8 sum = 0;
225 int i;
226
227 for (i = 0; i < datalen; i++)
228 sum += data[i];
229
63123108 230 return pn533_std_checksum(sum);
c46ee386
AAJ		 231}
232
63123108 233static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 234{
63123108 235 struct pn533_std_frame *frame = _frame;
9e2d493e 236
c46ee386 237 frame->preamble = 0;
63123108
WR		 238 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
239 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
1575b9d8 240 PN533_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 241 frame->datalen = 2;
242}
243
63123108 244static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 245{
63123108 246 struct pn533_std_frame *frame = _frame;
9e2d493e 247
63123108 248 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 249
63123108
WR		 250 PN533_STD_FRAME_CHECKSUM(frame) =
251 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 252
63123108 253 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 254}
255
63123108 256static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 257{
63123108 258 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 259
260 frame->datalen += len;
261}
262
56a63c82 263static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
c46ee386
AAJ		 264{
265 u8 checksum;
1575b9d8 266 struct pn533_std_frame *stdf = _frame;
c46ee386 267
1575b9d8 268 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 269 return false;
270
1575b9d8
OG		 271 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
272 /* Standard frame code */
56a63c82 273 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
1575b9d8
OG		 274
275 checksum = pn533_std_checksum(stdf->datalen);
276 if (checksum != stdf->datalen_checksum)
277 return false;
278
279 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
280 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
281 return false;
282 } else {
283 /* Extended */
284 struct pn533_ext_frame *eif = _frame;
285
56a63c82
OG		 286 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
287
1575b9d8
OG		 288 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
289 if (checksum != eif->datalen_checksum)
290 return false;
291
292 /* check data checksum */
293 checksum = pn533_std_data_checksum(eif->data,
294 be16_to_cpu(eif->datalen));
295 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
296 return false;
297 }
c46ee386
AAJ		 298
299 return true;
300}
301
9815c7cf 302bool pn533_rx_frame_is_ack(void *_frame)
c46ee386 303{
9815c7cf
MT		 304 struct pn533_std_frame *frame = _frame;
305
63123108 306 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 307 return false;
308
309 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
310 return false;
311
312 return true;
313}
9815c7cf 314EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
c46ee386 315
63123108 316static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 317{
63123108 318 struct pn533_std_frame *f = frame;
9e2d493e 319
1575b9d8
OG		 320 /* check for Extended Information frame */
321 if (PN533_STD_IS_EXTENDED(f)) {
322 struct pn533_ext_frame *eif = frame;
323
324 return sizeof(struct pn533_ext_frame)
325 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
326 }
327
63123108
WR		 328 return sizeof(struct pn533_std_frame) + f->datalen +
329 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 330}
331
63123108 332static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 333{
63123108 334 struct pn533_std_frame *f = frame;
1575b9d8 335 struct pn533_ext_frame *eif = frame;
9e2d493e 336
1575b9d8
OG		 337 if (PN533_STD_IS_EXTENDED(f))
338 return PN533_FRAME_CMD(eif);
339 else
340 return PN533_FRAME_CMD(f);
9e2d493e
WR		 341}
342
9815c7cf
MT		 343bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
344{
345 return (dev->ops->get_cmd_code(frame) ==
346 PN533_CMD_RESPONSE(dev->cmd->code));
347}
348EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
349
350
ef3d56e1 351static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 352 .tx_frame_init = pn533_std_tx_frame_init,
353 .tx_frame_finish = pn533_std_tx_frame_finish,
354 .tx_update_payload_len = pn533_std_tx_update_payload_len,
355 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
356 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
357
358 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
359 .rx_frame_size = pn533_std_rx_frame_size,
360 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
361 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
362
363 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
364 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 365};
366
9e2d493e
WR		 367static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
368 struct sk_buff *skb)
aada17ac 369{
aada17ac
WR		 370 /* payload is already there, just update datalen */
371 int payload_len = skb->len;
9e2d493e 372 struct pn533_frame_ops *ops = dev->ops;
aada17ac 373
aada17ac 374
9e2d493e
WR		 375 skb_push(skb, ops->tx_header_len);
376 skb_put(skb, ops->tx_tail_len);
aada17ac 377
9e2d493e
WR		 378 ops->tx_frame_init(skb->data, cmd_code);
379 ops->tx_update_payload_len(skb->data, payload_len);
380 ops->tx_frame_finish(skb->data);
aada17ac
WR		 381}
382
ddf19d20 383static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 384{
ddf19d20 385 struct pn533_cmd *cmd = dev->cmd;
5dd9c1bd
AR		 386 struct sk_buff *resp;
387 int status, rc = 0;
aada17ac 388
5dd9c1bd
AR		 389 if (!cmd) {
390 dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
391 goto done;
392 }
aada17ac 393
5dd9c1bd 394 dev_kfree_skb(cmd->req);
aada17ac 395
5dd9c1bd
AR		 396 status = cmd->status;
397 resp = cmd->resp;
aada17ac 398
0c33d262 399 if (status < 0) {
4231604b
WR		 400 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
401 ERR_PTR(status));
aada17ac 402 dev_kfree_skb(resp);
2c206fb7 403 goto done;
aada17ac
WR		 404 }
405
5dd9c1bd
AR		 406 /* when no response is set we got interrupted */
407 if (!resp)
408 resp = ERR_PTR(-EINTR);
409
410 if (!IS_ERR(resp)) {
411 skb_pull(resp, dev->ops->rx_header_len);
412 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
413 }
aada17ac 414
4231604b 415 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 416
2c206fb7 417done:
4231604b 418 kfree(cmd);
2c206fb7 419 dev->cmd = NULL;
aada17ac
WR		 420 return rc;
421}
422
423static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
9815c7cf 424 struct sk_buff *req,
aada17ac
WR		 425 pn533_send_async_complete_t complete_cb,
426 void *complete_cb_context)
427{
428 struct pn533_cmd *cmd;
aada17ac
WR		 429 int rc = 0;
430
9815c7cf 431 dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
aada17ac 432
4231604b
WR		 433 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
434 if (!cmd)
aada17ac
WR		 435 return -ENOMEM;
436
4b2a9532 437 cmd->code = cmd_code;
4231604b 438 cmd->req = req;
4231604b
WR		 439 cmd->complete_cb = complete_cb;
440 cmd->complete_cb_context = complete_cb_context;
aada17ac 441
9e2d493e 442 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 443
444 mutex_lock(&dev->cmd_lock);
445
446 if (!dev->cmd_pending) {
5dd9c1bd 447 dev->cmd = cmd;
9815c7cf 448 rc = dev->phy_ops->send_frame(dev, req);
5dd9c1bd
AR		 449 if (rc) {
450 dev->cmd = NULL;
aada17ac 451 goto error;
5dd9c1bd 452 }
aada17ac
WR		 453
454 dev->cmd_pending = 1;
455 goto unlock;
456 }
457
9815c7cf 458 dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
b4834839 459 __func__, cmd_code);
aada17ac 460
aada17ac 461 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 462 list_add_tail(&cmd->queue, &dev->cmd_queue);
463
464 goto unlock;
465
466error:
4231604b 467 kfree(cmd);
aada17ac
WR		 468unlock:
469 mutex_unlock(&dev->cmd_lock);
470 return rc;
15461aeb
WR		 471}
472
473static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
474 struct sk_buff *req,
475 pn533_send_async_complete_t complete_cb,
476 void *complete_cb_context)
477{
15461aeb 478 int rc;
15461aeb 479
9815c7cf 480 rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
15461aeb 481 complete_cb_context);
15461aeb
WR		 482
483 return rc;
aada17ac
WR		 484}
485
486static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
487 struct sk_buff *req,
488 pn533_send_async_complete_t complete_cb,
489 void *complete_cb_context)
490{
aada17ac
WR		 491 int rc;
492
9815c7cf 493 rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
9e2d493e 494 complete_cb_context);
aada17ac
WR		 495
496 return rc;
497}
498
b1e666f5
WR		 499/*
500 * pn533_send_cmd_direct_async
501 *
0cf2a848 502 * The function sends a piority cmd directly to the chip omitting the cmd
b1e666f5
WR		 503 * queue. It's intended to be used by chaining mechanism of received responses
504 * where the host has to request every single chunk of data before scheduling
505 * next cmd from the queue.
506 */
507static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
508 struct sk_buff *req,
509 pn533_send_async_complete_t complete_cb,
510 void *complete_cb_context)
511{
4231604b 512 struct pn533_cmd *cmd;
b1e666f5 513 int rc;
b1e666f5 514
4231604b 515 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
9815c7cf 516 if (!cmd)
b1e666f5 517 return -ENOMEM;
b1e666f5 518
4b2a9532 519 cmd->code = cmd_code;
4231604b 520 cmd->req = req;
4231604b
WR		 521 cmd->complete_cb = complete_cb;
522 cmd->complete_cb_context = complete_cb_context;
b1e666f5 523
9e2d493e 524 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 525
5dd9c1bd 526 dev->cmd = cmd;
9815c7cf 527 rc = dev->phy_ops->send_frame(dev, req);
5dd9c1bd
AR		 528 if (rc < 0) {
529 dev->cmd = NULL;
4231604b 530 kfree(cmd);
5dd9c1bd 531 }
b1e666f5
WR		 532
533 return rc;
534}
535
c79490e1
WR		 536static void pn533_wq_cmd_complete(struct work_struct *work)
537{
538 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
539 int rc;
540
541 rc = pn533_send_async_complete(dev);
542 if (rc != -EINPROGRESS)
543 queue_work(dev->wq, &dev->cmd_work);
544}
545
5d50b364
SO		 546static void pn533_wq_cmd(struct work_struct *work)
547{
548 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
549 struct pn533_cmd *cmd;
0ce1fbdd 550 int rc;
5d50b364
SO		 551
552 mutex_lock(&dev->cmd_lock);
553
554 if (list_empty(&dev->cmd_queue)) {
555 dev->cmd_pending = 0;
556 mutex_unlock(&dev->cmd_lock);
557 return;
558 }
559
560 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
561
60ad07ab
SJ		 562 list_del(&cmd->queue);
563
5d50b364
SO		 564 mutex_unlock(&dev->cmd_lock);
565
5dd9c1bd 566 dev->cmd = cmd;
9815c7cf 567 rc = dev->phy_ops->send_frame(dev, cmd->req);
0ce1fbdd 568 if (rc < 0) {
5dd9c1bd 569 dev->cmd = NULL;
0ce1fbdd 570 dev_kfree_skb(cmd->req);
4231604b 571 kfree(cmd);
2c206fb7 572 return;
0ce1fbdd 573 }
2c206fb7 574
5d50b364
SO		 575}
576
c46ee386 577struct pn533_sync_cmd_response {
94c5c156 578 struct sk_buff *resp;
c46ee386
AAJ		 579 struct completion done;
580};
581
94c5c156
WR		 582static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
583 struct sk_buff *resp)
584{
585 struct pn533_sync_cmd_response *arg = _arg;
586
94c5c156
WR		 587 arg->resp = resp;
588 complete(&arg->done);
589
590 return 0;
591}
592
593/* pn533_send_cmd_sync
594 *
595 * Please note the req parameter is freed inside the function to
596 * limit a number of return value interpretations by the caller.
597 *
598 * 1. negative in case of error during TX path -> req should be freed
599 *
600 * 2. negative in case of error during RX path -> req should not be freed
9815c7cf 601 * as it's been already freed at the beginning of RX path by
94c5c156
WR		 602 * async_complete_cb.
603 *
604 * 3. valid pointer in case of succesfult RX path
605 *
606 * A caller has to check a return value with IS_ERR macro. If the test pass,
607 * the returned pointer is valid.
608 *
9815c7cf 609 */
94c5c156
WR		 610static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
611 struct sk_buff *req)
612{
613 int rc;
614 struct pn533_sync_cmd_response arg;
615
94c5c156
WR		 616 init_completion(&arg.done);
617
618 rc = pn533_send_cmd_async(dev, cmd_code, req,
619 pn533_send_sync_complete, &arg);
620 if (rc) {
621 dev_kfree_skb(req);
622 return ERR_PTR(rc);
623 }
624
625 wait_for_completion(&arg.done);
626
627 return arg.resp;
628}
629
9e2d493e 630static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 631{
632 struct sk_buff *skb;
633
9e2d493e 634 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 635 size +
9e2d493e 636 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 637
638 if (skb)
9e2d493e 639 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 640
641 return skb;
642}
643
c46ee386
AAJ		 644struct pn533_target_type_a {
645 __be16 sens_res;
646 u8 sel_res;
647 u8 nfcid_len;
648 u8 nfcid_data[];
649} __packed;
650
651
652#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
653#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
654#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
655
656#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
657#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
658
659#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
660#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
661
662#define PN533_TYPE_A_SEL_PROT_MIFARE 0
663#define PN533_TYPE_A_SEL_PROT_ISO14443 1
664#define PN533_TYPE_A_SEL_PROT_DEP 2
665#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
666
667static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
668 int target_data_len)
669{
670 u8 ssd;
671 u8 platconf;
672
673 if (target_data_len < sizeof(struct pn533_target_type_a))
674 return false;
675
9815c7cf
MT		 676 /*
677 * The length check of nfcid[] and ats[] are not being performed because
678 * the values are not being used
679 */
c46ee386
AAJ		 680
681 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
682 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
683 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
684
685 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 686 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
687 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
688 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 689 return false;
690
691 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
692 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
693 return false;
694
695 return true;
696}
697
698static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
699 int tgt_data_len)
700{
701 struct pn533_target_type_a *tgt_type_a;
702
37cf4fc6 703 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 704
705 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
706 return -EPROTO;
707
708 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
709 case PN533_TYPE_A_SEL_PROT_MIFARE:
710 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
711 break;
712 case PN533_TYPE_A_SEL_PROT_ISO14443:
713 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
714 break;
715 case PN533_TYPE_A_SEL_PROT_DEP:
716 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
717 break;
718 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
719 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
720 NFC_PROTO_NFC_DEP_MASK;
721 break;
722 }
723
724 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
725 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 726 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
727 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 728
729 return 0;
730}
731
732struct pn533_target_felica {
733 u8 pol_res;
734 u8 opcode;
322bce95 735 u8 nfcid2[NFC_NFCID2_MAXSIZE];
c46ee386
AAJ		 736 u8 pad[8];
737 /* optional */
738 u8 syst_code[];
739} __packed;
740
741#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
742#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
743
744static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
745 int target_data_len)
746{
747 if (target_data_len < sizeof(struct pn533_target_felica))
748 return false;
749
750 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
751 return false;
752
753 return true;
754}
755
756static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
757 int tgt_data_len)
758{
759 struct pn533_target_felica *tgt_felica;
760
37cf4fc6 761 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 762
763 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
764 return -EPROTO;
765
5d467742
WR		 766 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
767 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 768 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
769 else
770 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
771
7975754f
SO		 772 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
773 nfc_tgt->sensf_res_len = 9;
774
322bce95
SO		 775 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
776 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
777
c46ee386
AAJ		 778 return 0;
779}
780
781struct pn533_target_jewel {
782 __be16 sens_res;
783 u8 jewelid[4];
784} __packed;
785
786static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
787 int target_data_len)
788{
789 u8 ssd;
790 u8 platconf;
791
792 if (target_data_len < sizeof(struct pn533_target_jewel))
793 return false;
794
795 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
796 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
797 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
798
799 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 800 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
801 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
802 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 803 return false;
804
805 return true;
806}
807
808static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
809 int tgt_data_len)
810{
811 struct pn533_target_jewel *tgt_jewel;
812
37cf4fc6 813 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 814
815 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
816 return -EPROTO;
817
818 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
819 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 820 nfc_tgt->nfcid1_len = 4;
821 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 822
823 return 0;
824}
825
826struct pn533_type_b_prot_info {
827 u8 bitrate;
828 u8 fsci_type;
829 u8 fwi_adc_fo;
830} __packed;
831
832#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
833#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
834#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
835
836struct pn533_type_b_sens_res {
837 u8 opcode;
838 u8 nfcid[4];
839 u8 appdata[4];
840 struct pn533_type_b_prot_info prot_info;
841} __packed;
842
843#define PN533_TYPE_B_OPC_SENSB_RES 0x50
844
845struct pn533_target_type_b {
846 struct pn533_type_b_sens_res sensb_res;
847 u8 attrib_res_len;
848 u8 attrib_res[];
849} __packed;
850
851static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
852 int target_data_len)
853{
854 if (target_data_len < sizeof(struct pn533_target_type_b))
855 return false;
856
857 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
858 return false;
859
860 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
861 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
862 return false;
863
864 return true;
865}
866
867static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
868 int tgt_data_len)
869{
870 struct pn533_target_type_b *tgt_type_b;
871
37cf4fc6 872 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 873
874 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
875 return -EPROTO;
876
01d719a2 877 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 878
879 return 0;
880}
881
c952f915 882static void pn533_poll_reset_mod_list(struct pn533 *dev);
b5193e5d
WR		 883static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
884 int tgdata_len)
c46ee386 885{
c46ee386
AAJ		 886 struct nfc_target nfc_tgt;
887 int rc;
888
9815c7cf 889 dev_dbg(dev->dev, "%s: modulation=%d\n",
b4834839 890 __func__, dev->poll_mod_curr);
c46ee386 891
b5193e5d 892 if (tg != 1)
c46ee386
AAJ		 893 return -EPROTO;
894
98b3ac1b
SO		 895 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
896
c46ee386
AAJ		 897 switch (dev->poll_mod_curr) {
898 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 899 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 900 break;
901 case PN533_POLL_MOD_212KBPS_FELICA:
902 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 903 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 904 break;
905 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 906 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 907 break;
908 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 909 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 910 break;
911 default:
9815c7cf 912 nfc_err(dev->dev,
073a625f 913 "Unknown current poll modulation\n");
c46ee386
AAJ		 914 return -EPROTO;
915 }
916
917 if (rc)
918 return rc;
919
920 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
9815c7cf 921 dev_dbg(dev->dev,
b4834839 922 "The Tg found doesn't have the desired protocol\n");
c46ee386
AAJ		 923 return -EAGAIN;
924 }
925
9815c7cf 926 dev_dbg(dev->dev,
b4834839
JP		 927 "Target found - supported protocols: 0x%x\n",
928 nfc_tgt.supported_protocols);
c46ee386
AAJ		 929
930 dev->tgt_available_prots = nfc_tgt.supported_protocols;
931
c952f915 932 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 933 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
934
935 return 0;
936}
937
6fbbdc16
SO		 938static inline void pn533_poll_next_mod(struct pn533 *dev)
939{
940 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
941}
942
c46ee386
AAJ		 943static void pn533_poll_reset_mod_list(struct pn533 *dev)
944{
945 dev->poll_mod_count = 0;
946}
947
948static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
949{
950 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 951 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 952 dev->poll_mod_count++;
953}
954
6fbbdc16
SO		 955static void pn533_poll_create_mod_list(struct pn533 *dev,
956 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 957{
958 pn533_poll_reset_mod_list(dev);
959
b08e8603
WR		 960 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
961 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
962 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 963 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
964
b08e8603
WR		 965 if (im_protocols & NFC_PROTO_FELICA_MASK ||
966 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 967 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
968 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
969 }
970
6fbbdc16 971 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 972 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
973
01d719a2 974 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 975 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 976
6fbbdc16
SO		 977 if (tm_protocols)
978 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 979}
980
b5193e5d 981static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 982{
b5193e5d
WR		 983 u8 nbtg, tg, *tgdata;
984 int rc, tgdata_len;
c46ee386 985
673088fb 986 /* Toggle the DEP polling */
e997ebbe
MT		 987 if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
988 dev->poll_dep = 1;
673088fb 989
b5193e5d
WR		 990 nbtg = resp->data[0];
991 tg = resp->data[1];
992 tgdata = &resp->data[2];
993 tgdata_len = resp->len - 2; /* nbtg + tg */
994
995 if (nbtg) {
996 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 997
998 /* We must stop the poll after a valid target found */
c952f915 999 if (rc == 0)
6fbbdc16 1000 return 0;
c46ee386
AAJ		 1001 }
1002
6fbbdc16 1003 return -EAGAIN;
c46ee386
AAJ		 1004}
1005
9e2d493e 1006static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1007{
b5193e5d 1008 struct sk_buff *skb;
b952f4df 1009 u8 *felica, *nfcid3;
b5193e5d 1010
9e2d493e
WR		 1011 u8 *gbytes = dev->gb;
1012 size_t gbytes_len = dev->gb_len;
1013
51d9e803
SO		 1014 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1015 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1016 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1017 0xff, 0xff}; /* System code */
b5193e5d 1018
51d9e803
SO		 1019 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1020 0x0, 0x0, 0x0,
1021 0x40}; /* SEL_RES for DEP */
ad3823ce 1022
9815c7cf
MT		 1023 unsigned int skb_len = 36 + /*
1024 * mode (1), mifare (6),
1025 * felica (18), nfcid3 (10), gb_len (1)
1026 */
b5193e5d
WR		 1027 gbytes_len +
1028 1; /* len Tk*/
ad3823ce 1029
9e2d493e 1030 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1031 if (!skb)
1032 return NULL;
ad3823ce
SO		 1033
1034 /* DEP support only */
634fef61 1035 skb_put_u8(skb, PN533_INIT_TARGET_DEP);
b5193e5d
WR		 1036
1037 /* MIFARE params */
59ae1d12 1038 skb_put_data(skb, mifare_params, 6);
51d9e803
SO		 1039
1040 /* Felica params */
59ae1d12 1041 felica = skb_put_data(skb, felica_params, 18);
b5193e5d 1042 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1043
1044 /* NFCID3 */
aa9f979c 1045 nfcid3 = skb_put_zero(skb, 10);
b5193e5d 1046 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1047
1048 /* General bytes */
634fef61 1049 skb_put_u8(skb, gbytes_len);
51d9e803 1050
b952f4df 1051 skb_put_data(skb, gbytes, gbytes_len);
ad3823ce 1052
b5193e5d 1053 /* Len Tk */
634fef61 1054 skb_put_u8(skb, 0);
51d9e803 1055
b5193e5d 1056 return skb;
ad3823ce
SO		 1057}
1058
3c13b244
OG		 1059static void pn533_wq_tm_mi_recv(struct work_struct *work);
1060static struct sk_buff *pn533_build_response(struct pn533 *dev);
1061
103b34cf 1062static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1063 struct sk_buff *resp)
103b34cf 1064{
3c13b244
OG		 1065 struct sk_buff *skb;
1066 u8 status, ret, mi;
1067 int rc;
103b34cf 1068
9815c7cf 1069 dev_dbg(dev->dev, "%s\n", __func__);
103b34cf 1070
3c13b244
OG		 1071 if (IS_ERR(resp)) {
1072 skb_queue_purge(&dev->resp_q);
e4878823 1073 return PTR_ERR(resp);
3c13b244 1074 }
103b34cf 1075
e4878823 1076 status = resp->data[0];
3c13b244
OG		 1077
1078 ret = status & PN533_CMD_RET_MASK;
1079 mi = status & PN533_CMD_MI_MASK;
1080
e4878823 1081 skb_pull(resp, sizeof(status));
103b34cf 1082
3c13b244
OG		 1083 if (ret != PN533_CMD_RET_SUCCESS) {
1084 rc = -EIO;
1085 goto error;
1086 }
1087
1088 skb_queue_tail(&dev->resp_q, resp);
1089
1090 if (mi) {
1091 queue_work(dev->wq, &dev->mi_tm_rx_work);
1092 return -EINPROGRESS;
1093 }
1094
1095 skb = pn533_build_response(dev);
1096 if (!skb) {
1097 rc = -EIO;
1098 goto error;
103b34cf
SO		 1099 }
1100
3c13b244
OG		 1101 return nfc_tm_data_received(dev->nfc_dev, skb);
1102
1103error:
1104 nfc_tm_deactivated(dev->nfc_dev);
1105 dev->tgt_mode = 0;
1106 skb_queue_purge(&dev->resp_q);
1107 dev_kfree_skb(resp);
1108
1109 return rc;
1110}
1111
1112static void pn533_wq_tm_mi_recv(struct work_struct *work)
1113{
1114 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1115 struct sk_buff *skb;
1116 int rc;
1117
9815c7cf 1118 dev_dbg(dev->dev, "%s\n", __func__);
3c13b244
OG		 1119
1120 skb = pn533_alloc_skb(dev, 0);
1121 if (!skb)
1122 return;
1123
1124 rc = pn533_send_cmd_direct_async(dev,
1125 PN533_CMD_TG_GET_DATA,
1126 skb,
1127 pn533_tm_get_data_complete,
1128 NULL);
1129
1130 if (rc < 0)
1131 dev_kfree_skb(skb);
103b34cf
SO		 1132}
1133
93ad4202
OG		 1134static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1135 struct sk_buff *resp);
1136static void pn533_wq_tm_mi_send(struct work_struct *work)
1137{
1138 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1139 struct sk_buff *skb;
1140 int rc;
1141
9815c7cf 1142 dev_dbg(dev->dev, "%s\n", __func__);
93ad4202
OG		 1143
1144 /* Grab the first skb in the queue */
1145 skb = skb_dequeue(&dev->fragment_skb);
1146 if (skb == NULL) { /* No more data */
1147 /* Reset the queue for future use */
1148 skb_queue_head_init(&dev->fragment_skb);
1149 goto error;
1150 }
1151
1152 /* last entry - remove MI bit */
1153 if (skb_queue_len(&dev->fragment_skb) == 0) {
1154 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1155 skb, pn533_tm_send_complete, NULL);
1156 } else
1157 rc = pn533_send_cmd_direct_async(dev,
1158 PN533_CMD_TG_SET_META_DATA,
1159 skb, pn533_tm_send_complete, NULL);
1160
1161 if (rc == 0) /* success */
1162 return;
1163
9815c7cf 1164 dev_err(dev->dev,
93ad4202
OG		 1165 "Error %d when trying to perform set meta data_exchange", rc);
1166
1167 dev_kfree_skb(skb);
1168
1169error:
9815c7cf 1170 dev->phy_ops->send_ack(dev, GFP_KERNEL);
93ad4202
OG		 1171 queue_work(dev->wq, &dev->cmd_work);
1172}
1173
103b34cf
SO		 1174static void pn533_wq_tg_get_data(struct work_struct *work)
1175{
1176 struct pn533 *dev = container_of(work, struct pn533, tg_work);
e4878823
WR		 1177 struct sk_buff *skb;
1178 int rc;
103b34cf 1179
9815c7cf 1180 dev_dbg(dev->dev, "%s\n", __func__);
103b34cf 1181
9e2d493e 1182 skb = pn533_alloc_skb(dev, 0);
e4878823 1183 if (!skb)
103b34cf
SO		 1184 return;
1185
e4878823
WR		 1186 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1187 pn533_tm_get_data_complete, NULL);
103b34cf 1188
e4878823
WR		 1189 if (rc < 0)
1190 dev_kfree_skb(skb);
103b34cf
SO		 1191}
1192
fc40a8c1 1193#define ATR_REQ_GB_OFFSET 17
b5193e5d 1194static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1195{
b5193e5d 1196 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1197 size_t gb_len;
103b34cf 1198 int rc;
ad3823ce 1199
9815c7cf 1200 dev_dbg(dev->dev, "%s\n", __func__);
ad3823ce 1201
b5193e5d 1202 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1203 return -EINVAL;
1204
b5193e5d
WR		 1205 mode = resp->data[0];
1206 cmd = &resp->data[1];
ad3823ce 1207
9815c7cf 1208 dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
b4834839 1209 mode, resp->len);
ad3823ce 1210
b5193e5d
WR		 1211 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1212 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1213 comm_mode = NFC_COMM_ACTIVE;
1214
b5193e5d 1215 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1216 return -EOPNOTSUPP;
1217
b5193e5d
WR		 1218 gb = cmd + ATR_REQ_GB_OFFSET;
1219 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1220
103b34cf
SO		 1221 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1222 comm_mode, gb, gb_len);
1223 if (rc < 0) {
9815c7cf 1224 nfc_err(dev->dev,
073a625f 1225 "Error when signaling target activation\n");
103b34cf
SO		 1226 return rc;
1227 }
1228
51ad304c 1229 dev->tgt_mode = 1;
103b34cf
SO		 1230 queue_work(dev->wq, &dev->tg_work);
1231
1232 return 0;
fe7c5800
SO		 1233}
1234
e99e88a9 1235static void pn533_listen_mode_timer(struct timer_list *t)
ad3823ce 1236{
e99e88a9 1237 struct pn533 *dev = from_timer(dev, t, listen_timer);
6fbbdc16 1238
9815c7cf 1239 dev_dbg(dev->dev, "Listen mode timeout\n");
6fbbdc16 1240
6fbbdc16
SO		 1241 dev->cancel_listen = 1;
1242
6fbbdc16
SO		 1243 pn533_poll_next_mod(dev);
1244
46f793b0
SO		 1245 queue_delayed_work(dev->wq, &dev->poll_work,
1246 msecs_to_jiffies(PN533_POLL_INTERVAL));
6fbbdc16
SO		 1247}
1248
17e9d9d4
SO		 1249static int pn533_rf_complete(struct pn533 *dev, void *arg,
1250 struct sk_buff *resp)
1251{
1252 int rc = 0;
1253
9815c7cf 1254 dev_dbg(dev->dev, "%s\n", __func__);
17e9d9d4
SO		 1255
1256 if (IS_ERR(resp)) {
1257 rc = PTR_ERR(resp);
1258
9815c7cf 1259 nfc_err(dev->dev, "RF setting error %d\n", rc);
17e9d9d4
SO		 1260
1261 return rc;
1262 }
1263
46f793b0
SO		 1264 queue_delayed_work(dev->wq, &dev->poll_work,
1265 msecs_to_jiffies(PN533_POLL_INTERVAL));
17e9d9d4
SO		 1266
1267 dev_kfree_skb(resp);
1268 return rc;
1269}
1270
1271static void pn533_wq_rf(struct work_struct *work)
1272{
1273 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1274 struct sk_buff *skb;
1275 int rc;
1276
9815c7cf 1277 dev_dbg(dev->dev, "%s\n", __func__);
17e9d9d4
SO		 1278
1279 skb = pn533_alloc_skb(dev, 2);
1280 if (!skb)
1281 return;
1282
634fef61
JB		 1283 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1284 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
17e9d9d4
SO		 1285
1286 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1287 pn533_rf_complete, NULL);
1288 if (rc < 0) {
1289 dev_kfree_skb(skb);
9815c7cf 1290 nfc_err(dev->dev, "RF setting error %d\n", rc);
17e9d9d4 1291 }
17e9d9d4
SO		 1292}
1293
673088fb
SO		 1294static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1295 struct sk_buff *resp)
1296{
1297 struct pn533_cmd_jump_dep_response *rsp;
1298 struct nfc_target nfc_target;
1299 u8 target_gt_len;
1300 int rc;
1301
1302 if (IS_ERR(resp))
1303 return PTR_ERR(resp);
1304
1305 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1306
1307 rc = rsp->status & PN533_CMD_RET_MASK;
1308 if (rc != PN533_CMD_RET_SUCCESS) {
1309 /* Not target found, turn radio off */
1310 queue_work(dev->wq, &dev->rf_work);
1311
1312 dev_kfree_skb(resp);
1313 return 0;
1314 }
1315
9815c7cf 1316 dev_dbg(dev->dev, "Creating new target");
673088fb
SO		 1317
1318 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1319 nfc_target.nfcid1_len = 10;
1320 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1321 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1322 if (rc)
1323 goto error;
1324
1325 dev->tgt_available_prots = 0;
1326 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1327
1328 /* ATR_RES general bytes are located at offset 17 */
1329 target_gt_len = resp->len - 17;
1330 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1331 rsp->gt, target_gt_len);
1332 if (!rc) {
1333 rc = nfc_dep_link_is_up(dev->nfc_dev,
1334 dev->nfc_dev->targets[0].idx,
1335 0, NFC_RF_INITIATOR);
1336
1337 if (!rc)
1338 pn533_poll_reset_mod_list(dev);
1339 }
1340error:
1341 dev_kfree_skb(resp);
1342 return rc;
1343}
1344
1345#define PASSIVE_DATA_LEN 5
1346static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1347{
1348 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1349 struct sk_buff *skb;
1350 int rc, skb_len;
1351 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1352 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1353
9815c7cf 1354 dev_dbg(dev->dev, "%s", __func__);
673088fb
SO		 1355
1356 if (!dev->gb) {
1357 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1358
1359 if (!dev->gb || !dev->gb_len) {
1360 dev->poll_dep = 0;
1361 queue_work(dev->wq, &dev->rf_work);
1362 }
1363 }
1364
1365 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1366 skb_len += PASSIVE_DATA_LEN;
1367
1368 /* NFCID3 */
1369 skb_len += NFC_NFCID3_MAXSIZE;
1370 nfcid3[0] = 0x1;
1371 nfcid3[1] = 0xfe;
1372 get_random_bytes(nfcid3 + 2, 6);
1373
1374 skb = pn533_alloc_skb(dev, skb_len);
1375 if (!skb)
1376 return -ENOMEM;
1377
634fef61
JB		 1378 skb_put_u8(skb, 0x01); /* Active */
1379 skb_put_u8(skb, 0x02); /* 424 kbps */
673088fb
SO		 1380
1381 next = skb_put(skb, 1); /* Next */
1382 *next = 0;
1383
1384 /* Copy passive data */
59ae1d12 1385 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
673088fb
SO		 1386 *next |= 1;
1387
1388 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
59ae1d12 1389 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
673088fb
SO		 1390 *next |= 2;
1391
59ae1d12 1392 skb_put_data(skb, dev->gb, dev->gb_len);
673088fb
SO		 1393 *next |= 4; /* We have some Gi */
1394
1395 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1396 pn533_poll_dep_complete, NULL);
1397
1398 if (rc < 0)
1399 dev_kfree_skb(skb);
1400
1401 return rc;
1402}
1403
6fbbdc16 1404static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1405 struct sk_buff *resp)
6fbbdc16
SO		 1406{
1407 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1408 int rc;
1409
9815c7cf 1410 dev_dbg(dev->dev, "%s\n", __func__);
ad3823ce 1411
b5193e5d
WR		 1412 if (IS_ERR(resp)) {
1413 rc = PTR_ERR(resp);
1414
9815c7cf 1415 nfc_err(dev->dev, "%s Poll complete error %d\n",
073a625f 1416 __func__, rc);
b5193e5d
WR		 1417
1418 if (rc == -ENOENT) {
1419 if (dev->poll_mod_count != 0)
1420 return rc;
9815c7cf 1421 goto stop_poll;
b5193e5d 1422 } else if (rc < 0) {
9815c7cf 1423 nfc_err(dev->dev,
073a625f 1424 "Error %d when running poll\n", rc);
b5193e5d
WR		 1425 goto stop_poll;
1426 }
6fbbdc16 1427 }
ad3823ce 1428
6fbbdc16
SO		 1429 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1430
b5193e5d 1431 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1432 del_timer(&dev->listen_timer);
b5193e5d
WR		 1433 rc = pn533_init_target_complete(dev, resp);
1434 goto done;
6fbbdc16
SO		 1435 }
1436
b5193e5d
WR		 1437 /* Initiator mode */
1438 rc = pn533_start_poll_complete(dev, resp);
1439 if (!rc)
1440 goto done;
6fbbdc16 1441
95cb9e10 1442 if (!dev->poll_mod_count) {
9815c7cf 1443 dev_dbg(dev->dev, "Polling has been stopped\n");
95cb9e10
WR		 1444 goto done;
1445 }
1446
b5193e5d 1447 pn533_poll_next_mod(dev);
17e9d9d4
SO		 1448 /* Not target found, turn radio off */
1449 queue_work(dev->wq, &dev->rf_work);
6fbbdc16 1450
b5193e5d
WR		 1451done:
1452 dev_kfree_skb(resp);
1453 return rc;
6fbbdc16
SO		 1454
1455stop_poll:
9815c7cf 1456 nfc_err(dev->dev, "Polling operation has been stopped\n");
b5193e5d 1457
6fbbdc16
SO		 1458 pn533_poll_reset_mod_list(dev);
1459 dev->poll_protocols = 0;
b5193e5d 1460 return rc;
ad3823ce
SO		 1461}
1462
9e2d493e
WR		 1463static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1464 struct pn533_poll_modulations *mod)
c46ee386 1465{
b5193e5d 1466 struct sk_buff *skb;
c46ee386 1467
9e2d493e 1468 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1469 if (!skb)
1470 return NULL;
c46ee386 1471
59ae1d12 1472 skb_put_data(skb, &mod->data, mod->len);
c46ee386 1473
b5193e5d 1474 return skb;
6fbbdc16 1475}
c46ee386 1476
6fbbdc16
SO		 1477static int pn533_send_poll_frame(struct pn533 *dev)
1478{
b5193e5d
WR		 1479 struct pn533_poll_modulations *mod;
1480 struct sk_buff *skb;
6fbbdc16 1481 int rc;
b5193e5d 1482 u8 cmd_code;
c46ee386 1483
b5193e5d 1484 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1485
9815c7cf 1486 dev_dbg(dev->dev, "%s mod len %d\n",
b4834839 1487 __func__, mod->len);
c46ee386 1488
e997ebbe 1489 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
673088fb
SO		 1490 dev->poll_dep = 0;
1491 return pn533_poll_dep(dev->nfc_dev);
1492 }
1493
b5193e5d
WR		 1494 if (mod->len == 0) { /* Listen mode */
1495 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1496 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1497 } else { /* Polling mode */
1498 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1499 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1500 }
1501
1502 if (!skb) {
9815c7cf 1503 nfc_err(dev->dev, "Failed to allocate skb\n");
b5193e5d
WR		 1504 return -ENOMEM;
1505 }
1506
1507 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1508 NULL);
1509 if (rc < 0) {
1510 dev_kfree_skb(skb);
9815c7cf 1511 nfc_err(dev->dev, "Polling loop error %d\n", rc);
b5193e5d 1512 }
c46ee386 1513
6fbbdc16
SO		 1514 return rc;
1515}
1516
1517static void pn533_wq_poll(struct work_struct *work)
1518{
46f793b0 1519 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
6fbbdc16
SO		 1520 struct pn533_poll_modulations *cur_mod;
1521 int rc;
1522
1523 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1524
9815c7cf 1525 dev_dbg(dev->dev,
b4834839
JP		 1526 "%s cancel_listen %d modulation len %d\n",
1527 __func__, dev->cancel_listen, cur_mod->len);
6fbbdc16
SO		 1528
1529 if (dev->cancel_listen == 1) {
1530 dev->cancel_listen = 0;
9815c7cf 1531 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1532 }
1533
6fbbdc16
SO		 1534 rc = pn533_send_poll_frame(dev);
1535 if (rc)
1536 return;
c46ee386 1537
6fbbdc16
SO		 1538 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1539 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386
AAJ		 1540}
1541
fe7c5800
SO		 1542static int pn533_start_poll(struct nfc_dev *nfc_dev,
1543 u32 im_protocols, u32 tm_protocols)
1544{
1545 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cec4b8ed 1546 struct pn533_poll_modulations *cur_mod;
dfccd0f5 1547 u8 rand_mod;
cec4b8ed 1548 int rc;
fe7c5800 1549
9815c7cf 1550 dev_dbg(dev->dev,
b4834839
JP		 1551 "%s: im protocols 0x%x tm protocols 0x%x\n",
1552 __func__, im_protocols, tm_protocols);
fe7c5800
SO		 1553
1554 if (dev->tgt_active_prot) {
9815c7cf 1555 nfc_err(dev->dev,
073a625f 1556 "Cannot poll with a target already activated\n");
fe7c5800
SO		 1557 return -EBUSY;
1558 }
1559
51ad304c 1560 if (dev->tgt_mode) {
9815c7cf 1561 nfc_err(dev->dev,
073a625f 1562 "Cannot poll while already being activated\n");
51ad304c
SO		 1563 return -EBUSY;
1564 }
1565
6fbbdc16
SO		 1566 if (tm_protocols) {
1567 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1568 if (dev->gb == NULL)
1569 tm_protocols = 0;
1570 }
ad3823ce 1571
6fbbdc16
SO		 1572 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1573 dev->poll_protocols = im_protocols;
1574 dev->listen_protocols = tm_protocols;
ad3823ce 1575
dfccd0f5
SO		 1576 /* Do not always start polling from the same modulation */
1577 get_random_bytes(&rand_mod, sizeof(rand_mod));
1578 rand_mod %= dev->poll_mod_count;
1579 dev->poll_mod_curr = rand_mod;
1580
cec4b8ed
SO		 1581 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1582
1583 rc = pn533_send_poll_frame(dev);
1584
1585 /* Start listen timer */
1586 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1587 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1588
1589 return rc;
fe7c5800
SO		 1590}
1591
c46ee386
AAJ		 1592static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1593{
1594 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1595
6fbbdc16
SO		 1596 del_timer(&dev->listen_timer);
1597
c46ee386 1598 if (!dev->poll_mod_count) {
9815c7cf 1599 dev_dbg(dev->dev,
b4834839 1600 "Polling operation was not running\n");
c46ee386
AAJ		 1601 return;
1602 }
1603
9815c7cf 1604 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
46f793b0 1605 flush_delayed_work(&dev->poll_work);
7c2a04a9 1606 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1607}
1608
1609static int pn533_activate_target_nfcdep(struct pn533 *dev)
1610{
cb950d93 1611 struct pn533_cmd_activate_response *rsp;
541d920b 1612 u16 gt_len;
c46ee386 1613 int rc;
cb950d93
WR		 1614 struct sk_buff *skb;
1615 struct sk_buff *resp;
c46ee386 1616
9815c7cf 1617 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386 1618
9e2d493e 1619 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1620 if (!skb)
1621 return -ENOMEM;
c46ee386 1622
634fef61
JB		 1623 skb_put_u8(skb, 1); /* TG */
1624 skb_put_u8(skb, 0); /* Next */
c46ee386 1625
cb950d93
WR		 1626 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1627 if (IS_ERR(resp))
1628 return PTR_ERR(resp);
c46ee386 1629
37cf4fc6 1630 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1631 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1632 if (rc != PN533_CMD_RET_SUCCESS) {
9815c7cf 1633 nfc_err(dev->dev,
073a625f 1634 "Target activation failed (error 0x%x)\n", rc);
cb950d93 1635 dev_kfree_skb(resp);
c46ee386 1636 return -EIO;
8a0ecfe7 1637 }
c46ee386 1638
541d920b 1639 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1640 gt_len = resp->len - 16;
1641 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1642
cb950d93 1643 dev_kfree_skb(resp);
541d920b 1644 return rc;
c46ee386
AAJ		 1645}
1646
90099433
EL		 1647static int pn533_activate_target(struct nfc_dev *nfc_dev,
1648 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1649{
1650 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1651 int rc;
1652
9815c7cf 1653 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
c46ee386
AAJ		 1654
1655 if (dev->poll_mod_count) {
9815c7cf 1656 nfc_err(dev->dev,
b4834839 1657 "Cannot activate while polling\n");
c46ee386
AAJ		 1658 return -EBUSY;
1659 }
1660
1661 if (dev->tgt_active_prot) {
9815c7cf 1662 nfc_err(dev->dev,
073a625f 1663 "There is already an active target\n");
c46ee386
AAJ		 1664 return -EBUSY;
1665 }
1666
1667 if (!dev->tgt_available_prots) {
9815c7cf 1668 nfc_err(dev->dev,
073a625f 1669 "There is no available target to activate\n");
c46ee386
AAJ		 1670 return -EINVAL;
1671 }
1672
1673 if (!(dev->tgt_available_prots & (1 << protocol))) {
9815c7cf 1674 nfc_err(dev->dev,
073a625f
JP		 1675 "Target doesn't support requested proto %u\n",
1676 protocol);
c46ee386
AAJ		 1677 return -EINVAL;
1678 }
1679
1680 if (protocol == NFC_PROTO_NFC_DEP) {
1681 rc = pn533_activate_target_nfcdep(dev);
1682 if (rc) {
9815c7cf 1683 nfc_err(dev->dev,
073a625f 1684 "Activating target with DEP failed %d\n", rc);
c46ee386
AAJ		 1685 return rc;
1686 }
1687 }
1688
1689 dev->tgt_active_prot = protocol;
1690 dev->tgt_available_prots = 0;
1691
1692 return 0;
1693}
1694
37f895d7
MT		 1695static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1696 struct sk_buff *resp)
1697{
1698 int rc = 0;
1699
9815c7cf 1700 dev_dbg(dev->dev, "%s\n", __func__);
37f895d7
MT		 1701
1702 if (IS_ERR(resp)) {
1703 rc = PTR_ERR(resp);
1704
9815c7cf 1705 nfc_err(dev->dev, "Target release error %d\n", rc);
37f895d7
MT		 1706
1707 return rc;
1708 }
1709
1710 rc = resp->data[0] & PN533_CMD_RET_MASK;
1711 if (rc != PN533_CMD_RET_SUCCESS)
9815c7cf 1712 nfc_err(dev->dev,
37f895d7
MT		 1713 "Error 0x%x when releasing the target\n", rc);
1714
1715 dev_kfree_skb(resp);
1716 return rc;
1717}
1718
90099433 1719static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
96d4581f 1720 struct nfc_target *target, u8 mode)
c46ee386
AAJ		 1721{
1722 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93 1723 struct sk_buff *skb;
c46ee386
AAJ		 1724 int rc;
1725
9815c7cf 1726 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386
AAJ		 1727
1728 if (!dev->tgt_active_prot) {
9815c7cf 1729 nfc_err(dev->dev, "There is no active target\n");
c46ee386
AAJ		 1730 return;
1731 }
1732
1733 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1734 skb_queue_purge(&dev->resp_q);
1735
9e2d493e 1736 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1737 if (!skb)
1738 return;
c46ee386 1739
634fef61 1740 skb_put_u8(skb, 1); /* TG*/
c46ee386 1741
37f895d7
MT		 1742 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1743 pn533_deactivate_target_complete, NULL);
1744 if (rc < 0) {
1745 dev_kfree_skb(skb);
9815c7cf 1746 nfc_err(dev->dev, "Target release error %d\n", rc);
37f895d7 1747 }
c46ee386
AAJ		 1748}
1749
361f3cb7
SO		 1750
1751static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1752 struct sk_buff *resp)
361f3cb7 1753{
13003649 1754 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1755 u8 target_gt_len;
1756 int rc;
13003649 1757 u8 active = *(u8 *)arg;
70418e6e
WR		 1758
1759 kfree(arg);
361f3cb7 1760
13003649
WR		 1761 if (IS_ERR(resp))
1762 return PTR_ERR(resp);
361f3cb7
SO		 1763
1764 if (dev->tgt_available_prots &&
1765 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
9815c7cf 1766 nfc_err(dev->dev,
073a625f 1767 "The target does not support DEP\n");
13003649
WR		 1768 rc = -EINVAL;
1769 goto error;
361f3cb7
SO		 1770 }
1771
13003649
WR		 1772 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1773
1774 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7 1775 if (rc != PN533_CMD_RET_SUCCESS) {
9815c7cf 1776 nfc_err(dev->dev,
073a625f 1777 "Bringing DEP link up failed (error 0x%x)\n", rc);
13003649 1778 goto error;
361f3cb7
SO		 1779 }
1780
1781 if (!dev->tgt_available_prots) {
13003649
WR		 1782 struct nfc_target nfc_target;
1783
9815c7cf 1784 dev_dbg(dev->dev, "Creating new target\n");
361f3cb7
SO		 1785
1786 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1787 nfc_target.nfcid1_len = 10;
13003649 1788 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1789 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1790 if (rc)
13003649 1791 goto error;
361f3cb7
SO		 1792
1793 dev->tgt_available_prots = 0;
1794 }
1795
1796 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1797
1798 /* ATR_RES general bytes are located at offset 17 */
13003649 1799 target_gt_len = resp->len - 17;
361f3cb7 1800 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1801 rsp->gt, target_gt_len);
361f3cb7
SO		 1802 if (rc == 0)
1803 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1804 dev->nfc_dev->targets[0].idx,
1805 !active, NFC_RF_INITIATOR);
361f3cb7 1806
13003649
WR		 1807error:
1808 dev_kfree_skb(resp);
1809 return rc;
361f3cb7
SO		 1810}
1811
17e9d9d4 1812static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
90099433 1813static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1814 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1815{
1816 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649 1817 struct sk_buff *skb;
5eef4845
SO		 1818 int rc, skb_len;
1819 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
d7f3345d 1820 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7 1821
9815c7cf 1822 dev_dbg(dev->dev, "%s\n", __func__);
361f3cb7 1823
361f3cb7 1824 if (dev->poll_mod_count) {
9815c7cf 1825 nfc_err(dev->dev,
073a625f 1826 "Cannot bring the DEP link up while polling\n");
361f3cb7
SO		 1827 return -EBUSY;
1828 }
1829
1830 if (dev->tgt_active_prot) {
9815c7cf 1831 nfc_err(dev->dev,
073a625f 1832 "There is already an active target\n");
361f3cb7
SO		 1833 return -EBUSY;
1834 }
1835
13003649 1836 skb_len = 3 + gb_len; /* ActPass + BR + Next */
5eef4845 1837 skb_len += PASSIVE_DATA_LEN;
d7f3345d 1838
5eef4845
SO		 1839 /* NFCID3 */
1840 skb_len += NFC_NFCID3_MAXSIZE;
1841 if (target && !target->nfcid2_len) {
1842 nfcid3[0] = 0x1;
1843 nfcid3[1] = 0xfe;
1844 get_random_bytes(nfcid3 + 2, 6);
1845 }
322bce95 1846
9e2d493e 1847 skb = pn533_alloc_skb(dev, skb_len);
13003649 1848 if (!skb)
361f3cb7
SO		 1849 return -ENOMEM;
1850
634fef61
JB		 1851 skb_put_u8(skb, !comm_mode); /* ActPass */
1852 skb_put_u8(skb, 0x02); /* 424 kbps */
13003649
WR		 1853
1854 next = skb_put(skb, 1); /* Next */
1855 *next = 0;
361f3cb7 1856
5eef4845 1857 /* Copy passive data */
59ae1d12 1858 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
5eef4845 1859 *next |= 1;
d7f3345d 1860
5eef4845
SO		 1861 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1862 if (target && target->nfcid2_len)
322bce95
SO		 1863 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
1864 target->nfcid2_len);
5eef4845 1865 else
59ae1d12 1866 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
5eef4845 1867 *next |= 2;
322bce95 1868
47807d3d 1869 if (gb != NULL && gb_len > 0) {
59ae1d12 1870 skb_put_data(skb, gb, gb_len);
13003649 1871 *next |= 4; /* We have some Gi */
361f3cb7 1872 } else {
13003649 1873 *next = 0;
361f3cb7
SO		 1874 }
1875
13003649
WR		 1876 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1877 if (!arg) {
1878 dev_kfree_skb(skb);
1879 return -ENOMEM;
1880 }
361f3cb7 1881
13003649 1882 *arg = !comm_mode;
361f3cb7 1883
17e9d9d4
SO		 1884 pn533_rf_field(dev->nfc_dev, 0);
1885
13003649
WR		 1886 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1887 pn533_in_dep_link_up_complete, arg);
1888
1889 if (rc < 0) {
1890 dev_kfree_skb(skb);
1891 kfree(arg);
1892 }
361f3cb7
SO		 1893
1894 return rc;
1895}
1896
1897static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1898{
6fbbdc16
SO		 1899 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1900
9815c7cf 1901 dev_dbg(dev->dev, "%s\n", __func__);
fcfafc76 1902
6fbbdc16
SO		 1903 pn533_poll_reset_mod_list(dev);
1904
10cff29a 1905 if (dev->tgt_mode || dev->tgt_active_prot)
9815c7cf 1906 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 1907
1908 dev->tgt_active_prot = 0;
1909 dev->tgt_mode = 0;
1910
1911 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 1912
1913 return 0;
1914}
1915
c46ee386 1916struct pn533_data_exchange_arg {
c46ee386
AAJ		 1917 data_exchange_cb_t cb;
1918 void *cb_context;
1919};
1920
6ff73fd2
SO		 1921static struct sk_buff *pn533_build_response(struct pn533 *dev)
1922{
1923 struct sk_buff *skb, *tmp, *t;
1924 unsigned int skb_len = 0, tmp_len = 0;
1925
9815c7cf 1926 dev_dbg(dev->dev, "%s\n", __func__);
6ff73fd2
SO		 1927
1928 if (skb_queue_empty(&dev->resp_q))
1929 return NULL;
1930
1931 if (skb_queue_len(&dev->resp_q) == 1) {
1932 skb = skb_dequeue(&dev->resp_q);
1933 goto out;
1934 }
1935
1936 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1937 skb_len += tmp->len;
1938
9815c7cf 1939 dev_dbg(dev->dev, "%s total length %d\n",
b4834839 1940 __func__, skb_len);
6ff73fd2
SO		 1941
1942 skb = alloc_skb(skb_len, GFP_KERNEL);
1943 if (skb == NULL)
1944 goto out;
1945
1946 skb_put(skb, skb_len);
1947
1948 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1949 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1950 tmp_len += tmp->len;
1951 }
1952
1953out:
1954 skb_queue_purge(&dev->resp_q);
1955
1956 return skb;
1957}
1958
c46ee386 1959static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 1960 struct sk_buff *resp)
c46ee386
AAJ		 1961{
1962 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 1963 struct sk_buff *skb;
1964 int rc = 0;
1965 u8 status, ret, mi;
c46ee386 1966
9815c7cf 1967 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386 1968
b1e666f5
WR		 1969 if (IS_ERR(resp)) {
1970 rc = PTR_ERR(resp);
1971 goto _error;
c46ee386
AAJ		 1972 }
1973
b1e666f5
WR		 1974 status = resp->data[0];
1975 ret = status & PN533_CMD_RET_MASK;
1976 mi = status & PN533_CMD_MI_MASK;
1977
1978 skb_pull(resp, sizeof(status));
c46ee386 1979
b1e666f5 1980 if (ret != PN533_CMD_RET_SUCCESS) {
9815c7cf 1981 nfc_err(dev->dev,
073a625f 1982 "Exchanging data failed (error 0x%x)\n", ret);
b1e666f5 1983 rc = -EIO;
c46ee386
AAJ		 1984 goto error;
1985 }
1986
b1e666f5 1987 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 1988
b1e666f5
WR		 1989 if (mi) {
1990 dev->cmd_complete_mi_arg = arg;
963a82e0
OG		 1991 queue_work(dev->wq, &dev->mi_rx_work);
1992 return -EINPROGRESS;
1993 }
1994
1995 /* Prepare for the next round */
1996 if (skb_queue_len(&dev->fragment_skb) > 0) {
1997 dev->cmd_complete_dep_arg = arg;
1998 queue_work(dev->wq, &dev->mi_tx_work);
1999
6ff73fd2 2000 return -EINPROGRESS;
c46ee386
AAJ		 2001 }
2002
6ff73fd2 2003 skb = pn533_build_response(dev);
5df848f3
JL		 2004 if (!skb) {
2005 rc = -ENOMEM;
6ff73fd2 2006 goto error;
5df848f3 2007 }
c46ee386 2008
6ff73fd2 2009 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2010 kfree(arg);
2011 return 0;
2012
2013error:
b1e666f5
WR		 2014 dev_kfree_skb(resp);
2015_error:
6ff73fd2 2016 skb_queue_purge(&dev->resp_q);
b1e666f5 2017 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2018 kfree(arg);
b1e666f5 2019 return rc;
c46ee386
AAJ		 2020}
2021
9815c7cf
MT		 2022/*
2023 * Receive an incoming pn533 frame. skb contains only header and payload.
2024 * If skb == NULL, it is a notification that the link below is dead.
2025 */
2026void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2027{
b31d5103
MT		 2028 if (!dev->cmd)
2029 goto sched_wq;
2030
9815c7cf
MT		 2031 dev->cmd->status = status;
2032
b31d5103
MT		 2033 if (status != 0) {
2034 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2035 goto sched_wq;
2036 }
2037
9815c7cf
MT		 2038 if (skb == NULL) {
2039 pr_err("NULL Frame -> link is dead\n");
2040 goto sched_wq;
2041 }
2042
2043 if (pn533_rx_frame_is_ack(skb->data)) {
2044 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2045 dev_kfree_skb(skb);
2046 return;
2047 }
2048
2049 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2050 dev->ops->rx_frame_size(skb->data), false);
2051
2052 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2053 nfc_err(dev->dev, "Received an invalid frame\n");
2054 dev->cmd->status = -EIO;
2055 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2056 nfc_err(dev->dev, "It it not the response to the last command\n");
2057 dev->cmd->status = -EIO;
2058 }
2059
2060 dev->cmd->resp = skb;
2061
2062sched_wq:
2063 queue_work(dev->wq, &dev->cmd_complete_work);
2064}
2065EXPORT_SYMBOL(pn533_recv_frame);
2066
963a82e0
OG		 2067/* Split the Tx skb into small chunks */
2068static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2069{
2070 struct sk_buff *frag;
2071 int frag_size;
2072
2073 do {
2074 /* Remaining size */
2075 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2076 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2077 else
2078 frag_size = skb->len;
2079
2080 /* Allocate and reserve */
2081 frag = pn533_alloc_skb(dev, frag_size);
2082 if (!frag) {
2083 skb_queue_purge(&dev->fragment_skb);
2084 break;
2085 }
2086
22953f93
OG		 2087 if (!dev->tgt_mode) {
2088 /* Reserve the TG/MI byte */
2089 skb_reserve(frag, 1);
2090
2091 /* MI + TG */
2092 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
d58ff351
JB		 2093 *(u8 *)skb_push(frag, sizeof(u8)) =
2094 (PN533_CMD_MI_MASK | 1);
22953f93 2095 else
d58ff351 2096 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
22953f93 2097 }
963a82e0 2098
59ae1d12 2099 skb_put_data(frag, skb->data, frag_size);
963a82e0
OG		 2100
2101 /* Reduce the size of incoming buffer */
2102 skb_pull(skb, frag_size);
2103
2104 /* Add this to skb_queue */
2105 skb_queue_tail(&dev->fragment_skb, frag);
2106
2107 } while (skb->len > 0);
2108
2109 dev_kfree_skb(skb);
2110
2111 return skb_queue_len(&dev->fragment_skb);
2112}
2113
be9ae4ce
SO		 2114static int pn533_transceive(struct nfc_dev *nfc_dev,
2115 struct nfc_target *target, struct sk_buff *skb,
2116 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2117{
2118 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2119 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2120 int rc;
2121
9815c7cf 2122 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386
AAJ		 2123
2124 if (!dev->tgt_active_prot) {
9815c7cf 2125 nfc_err(dev->dev,
073a625f 2126 "Can't exchange data if there is no active target\n");
c46ee386
AAJ		 2127 rc = -EINVAL;
2128 goto error;
2129 }
2130
b1e666f5 2131 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2132 if (!arg) {
2133 rc = -ENOMEM;
b1e666f5 2134 goto error;
c46ee386
AAJ		 2135 }
2136
c46ee386
AAJ		 2137 arg->cb = cb;
2138 arg->cb_context = cb_context;
2139
b1e666f5
WR		 2140 switch (dev->device_type) {
2141 case PN533_DEVICE_PASORI:
2142 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2143 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2144 skb,
2145 pn533_data_exchange_complete,
2146 arg);
2147
2148 break;
2149 }
2150 default:
963a82e0
OG		 2151 /* jumbo frame ? */
2152 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2153 rc = pn533_fill_fragment_skbs(dev, skb);
2154 if (rc <= 0)
2155 goto error;
2156
2157 skb = skb_dequeue(&dev->fragment_skb);
2158 if (!skb) {
2159 rc = -EIO;
2160 goto error;
2161 }
2162 } else {
d58ff351 2163 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
963a82e0 2164 }
b1e666f5
WR		 2165
2166 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2167 skb, pn533_data_exchange_complete,
2168 arg);
2169
2170 break;
c46ee386
AAJ		 2171 }
2172
b1e666f5
WR		 2173 if (rc < 0) /* rc from send_async */
2174 goto error;
2175
c46ee386
AAJ		 2176 return 0;
2177
c46ee386 2178error:
b1e666f5
WR		 2179 kfree(arg);
2180 dev_kfree_skb(skb);
c46ee386
AAJ		 2181 return rc;
2182}
2183
dadb06f2 2184static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2185 struct sk_buff *resp)
dadb06f2 2186{
e4878823 2187 u8 status;
5b412fd1 2188
9815c7cf 2189 dev_dbg(dev->dev, "%s\n", __func__);
dadb06f2 2190
e4878823
WR		 2191 if (IS_ERR(resp))
2192 return PTR_ERR(resp);
5b412fd1 2193
e4878823 2194 status = resp->data[0];
dadb06f2 2195
93ad4202
OG		 2196 /* Prepare for the next round */
2197 if (skb_queue_len(&dev->fragment_skb) > 0) {
2198 queue_work(dev->wq, &dev->mi_tm_tx_work);
2199 return -EINPROGRESS;
2200 }
e4878823 2201 dev_kfree_skb(resp);
dadb06f2 2202
e4878823 2203 if (status != 0) {
dadb06f2
SO		 2204 nfc_tm_deactivated(dev->nfc_dev);
2205
51ad304c
SO		 2206 dev->tgt_mode = 0;
2207
dadb06f2
SO		 2208 return 0;
2209 }
2210
2211 queue_work(dev->wq, &dev->tg_work);
2212
2213 return 0;
2214}
2215
2216static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2217{
2218 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2219 int rc;
2220
9815c7cf 2221 dev_dbg(dev->dev, "%s\n", __func__);
dadb06f2 2222
93ad4202 2223 /* let's split in multiple chunks if size's too big */
e4878823 2224 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
93ad4202
OG		 2225 rc = pn533_fill_fragment_skbs(dev, skb);
2226 if (rc <= 0)
2227 goto error;
2228
2229 /* get the first skb */
2230 skb = skb_dequeue(&dev->fragment_skb);
2231 if (!skb) {
2232 rc = -EIO;
2233 goto error;
2234 }
2235
2236 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2237 pn533_tm_send_complete, NULL);
2238 } else {
2239 /* Send th skb */
2240 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2241 pn533_tm_send_complete, NULL);
dadb06f2
SO		 2242 }
2243
93ad4202
OG		 2244error:
2245 if (rc < 0) {
e4878823 2246 dev_kfree_skb(skb);
93ad4202
OG		 2247 skb_queue_purge(&dev->fragment_skb);
2248 }
dadb06f2
SO		 2249
2250 return rc;
2251}
2252
6ff73fd2
SO		 2253static void pn533_wq_mi_recv(struct work_struct *work)
2254{
963a82e0 2255 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
b1e666f5 2256 struct sk_buff *skb;
6ff73fd2
SO		 2257 int rc;
2258
9815c7cf 2259 dev_dbg(dev->dev, "%s\n", __func__);
6ff73fd2 2260
9e2d493e 2261 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2262 if (!skb)
2263 goto error;
6ff73fd2 2264
b1e666f5
WR		 2265 switch (dev->device_type) {
2266 case PN533_DEVICE_PASORI:
2267 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2268 rc = pn533_send_cmd_direct_async(dev,
2269 PN533_CMD_IN_COMM_THRU,
2270 skb,
2271 pn533_data_exchange_complete,
2272 dev->cmd_complete_mi_arg);
6ff73fd2 2273
b1e666f5
WR		 2274 break;
2275 }
2276 default:
634fef61 2277 skb_put_u8(skb, 1); /*TG*/
6ff73fd2 2278
b1e666f5
WR		 2279 rc = pn533_send_cmd_direct_async(dev,
2280 PN533_CMD_IN_DATA_EXCHANGE,
2281 skb,
2282 pn533_data_exchange_complete,
2283 dev->cmd_complete_mi_arg);
b1bb290a 2284
b1e666f5 2285 break;
6ff73fd2
SO		 2286 }
2287
b1e666f5 2288 if (rc == 0) /* success */
6ff73fd2
SO		 2289 return;
2290
9815c7cf 2291 nfc_err(dev->dev,
073a625f 2292 "Error %d when trying to perform data_exchange\n", rc);
6ff73fd2 2293
b1e666f5 2294 dev_kfree_skb(skb);
140ef7f6 2295 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2296
b1e666f5 2297error:
9815c7cf 2298 dev->phy_ops->send_ack(dev, GFP_KERNEL);
5d50b364 2299 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2300}
2301
963a82e0
OG		 2302static void pn533_wq_mi_send(struct work_struct *work)
2303{
2304 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2305 struct sk_buff *skb;
2306 int rc;
2307
9815c7cf 2308 dev_dbg(dev->dev, "%s\n", __func__);
963a82e0
OG		 2309
2310 /* Grab the first skb in the queue */
2311 skb = skb_dequeue(&dev->fragment_skb);
2312
2313 if (skb == NULL) { /* No more data */
2314 /* Reset the queue for future use */
2315 skb_queue_head_init(&dev->fragment_skb);
2316 goto error;
2317 }
2318
2319 switch (dev->device_type) {
2320 case PN533_DEVICE_PASORI:
2321 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2322 rc = -EIO;
2323 break;
2324 }
2325
2326 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2327 skb,
2328 pn533_data_exchange_complete,
2329 dev->cmd_complete_dep_arg);
2330
2331 break;
2332
2333 default:
2334 /* Still some fragments? */
9815c7cf
MT		 2335 rc = pn533_send_cmd_direct_async(dev,
2336 PN533_CMD_IN_DATA_EXCHANGE,
963a82e0
OG		 2337 skb,
2338 pn533_data_exchange_complete,
2339 dev->cmd_complete_dep_arg);
2340
2341 break;
2342 }
2343
2344 if (rc == 0) /* success */
2345 return;
2346
9815c7cf 2347 nfc_err(dev->dev,
073a625f 2348 "Error %d when trying to perform data_exchange\n", rc);
963a82e0
OG		 2349
2350 dev_kfree_skb(skb);
2351 kfree(dev->cmd_complete_dep_arg);
2352
2353error:
9815c7cf 2354 dev->phy_ops->send_ack(dev, GFP_KERNEL);
963a82e0
OG		 2355 queue_work(dev->wq, &dev->cmd_work);
2356}
2357
c46ee386
AAJ		 2358static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2359 u8 cfgdata_len)
2360{
cb950d93
WR		 2361 struct sk_buff *skb;
2362 struct sk_buff *resp;
cb950d93 2363 int skb_len;
c46ee386 2364
9815c7cf 2365 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386 2366
cb950d93 2367 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2368
9e2d493e 2369 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2370 if (!skb)
2371 return -ENOMEM;
c46ee386 2372
634fef61 2373 skb_put_u8(skb, cfgitem);
59ae1d12 2374 skb_put_data(skb, cfgdata, cfgdata_len);
c46ee386 2375
cb950d93
WR		 2376 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2377 if (IS_ERR(resp))
2378 return PTR_ERR(resp);
c46ee386 2379
cb950d93
WR		 2380 dev_kfree_skb(resp);
2381 return 0;
2382}
2383
2384static int pn533_get_firmware_version(struct pn533 *dev,
2385 struct pn533_fw_version *fv)
2386{
2387 struct sk_buff *skb;
2388 struct sk_buff *resp;
2389
9e2d493e 2390 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2391 if (!skb)
2392 return -ENOMEM;
2393
2394 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2395 if (IS_ERR(resp))
2396 return PTR_ERR(resp);
2397
2398 fv->ic = resp->data[0];
2399 fv->ver = resp->data[1];
2400 fv->rev = resp->data[2];
2401 fv->support = resp->data[3];
2402
2403 dev_kfree_skb(resp);
2404 return 0;
c46ee386
AAJ		 2405}
2406
f75c2913 2407static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2408{
cb950d93
WR		 2409 struct sk_buff *skb;
2410 struct sk_buff *resp;
5c7b0531 2411
9815c7cf 2412 dev_dbg(dev->dev, "%s\n", __func__);
5c7b0531 2413
9e2d493e 2414 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2415 if (!skb)
2416 return -ENOMEM;
5c7b0531 2417
634fef61 2418 skb_put_u8(skb, 0x1);
5c7b0531 2419
cb950d93
WR		 2420 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2421 if (IS_ERR(resp))
2422 return PTR_ERR(resp);
5c7b0531 2423
cb950d93 2424 dev_kfree_skb(resp);
5c7b0531 2425
94c5c156 2426 return 0;
5c7b0531
SO		 2427}
2428
60d9edd5
SO		 2429static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2430{
2431 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2432 u8 rf_field = !!rf;
2433 int rc;
2434
3a8eab39
SO		 2435 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2436
60d9edd5
SO		 2437 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2438 (u8 *)&rf_field, 1);
2439 if (rc) {
9815c7cf 2440 nfc_err(dev->dev, "Error on setting RF field\n");
60d9edd5
SO		 2441 return rc;
2442 }
2443
2444 return rc;
2445}
2446
dd7bedcd
MT		 2447static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2448{
2449 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2450 struct sk_buff *skb;
2451 struct sk_buff *resp;
2452
2453 skb = pn533_alloc_skb(dev, 1);
2454 if (!skb)
2455 return -ENOMEM;
2456
634fef61 2457 skb_put_u8(skb, 0x01);
dd7bedcd
MT		 2458
2459 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2460 if (IS_ERR(resp))
2461 return PTR_ERR(resp);
2462
2463 dev_kfree_skb(resp);
2464 return 0;
2465}
2466
e44666b9 2467static int pn533_dev_up(struct nfc_dev *nfc_dev)
60d9edd5 2468{
dd7bedcd
MT		 2469 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2470
2471 if (dev->device_type == PN533_DEVICE_PN532) {
2472 int rc = pn532_sam_configuration(nfc_dev);
2473
2474 if (rc)
2475 return rc;
2476 }
2477
60d9edd5
SO		 2478 return pn533_rf_field(nfc_dev, 1);
2479}
2480
e44666b9 2481static int pn533_dev_down(struct nfc_dev *nfc_dev)
60d9edd5
SO		 2482{
2483 return pn533_rf_field(nfc_dev, 0);
2484}
2485
5c7b0531 2486static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2487 .dev_up = pn533_dev_up,
2488 .dev_down = pn533_dev_down,
361f3cb7
SO		 2489 .dep_link_up = pn533_dep_link_up,
2490 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2491 .start_poll = pn533_start_poll,
2492 .stop_poll = pn533_stop_poll,
2493 .activate_target = pn533_activate_target,
2494 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2495 .im_transceive = pn533_transceive,
dadb06f2 2496 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2497};
2498
5c7b0531
SO		 2499static int pn533_setup(struct pn533 *dev)
2500{
2501 struct pn533_config_max_retries max_retries;
2502 struct pn533_config_timing timing;
2503 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2504 int rc;
2505
2506 switch (dev->device_type) {
2507 case PN533_DEVICE_STD:
5c7b0531 2508 case PN533_DEVICE_PASORI:
53cf4839 2509 case PN533_DEVICE_ACR122U:
dd7bedcd 2510 case PN533_DEVICE_PN532:
5c7b0531
SO		 2511 max_retries.mx_rty_atr = 0x2;
2512 max_retries.mx_rty_psl = 0x1;
2513 max_retries.mx_rty_passive_act =
2514 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2515
2516 timing.rfu = PN533_CONFIG_TIMING_102;
2517 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2518 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2519
2520 break;
2521
2522 default:
9815c7cf 2523 nfc_err(dev->dev, "Unknown device type %d\n",
073a625f 2524 dev->device_type);
5c7b0531
SO		 2525 return -EINVAL;
2526 }
2527
2528 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2529 (u8 *)&max_retries, sizeof(max_retries));
2530 if (rc) {
9815c7cf 2531 nfc_err(dev->dev,
073a625f 2532 "Error on setting MAX_RETRIES config\n");
5c7b0531
SO		 2533 return rc;
2534 }
2535
2536
2537 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2538 (u8 *)&timing, sizeof(timing));
2539 if (rc) {
9815c7cf 2540 nfc_err(dev->dev, "Error on setting RF timings\n");
5c7b0531
SO		 2541 return rc;
2542 }
2543
2544 switch (dev->device_type) {
2545 case PN533_DEVICE_STD:
dd7bedcd 2546 case PN533_DEVICE_PN532:
5c7b0531
SO		 2547 break;
2548
2549 case PN533_DEVICE_PASORI:
f75c2913 2550 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2551
2552 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2553 pasori_cfg, 3);
2554 if (rc) {
9815c7cf 2555 nfc_err(dev->dev,
073a625f 2556 "Error while settings PASORI config\n");
5c7b0531
SO		 2557 return rc;
2558 }
2559
f75c2913 2560 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2561
2562 break;
2563 }
2564
2565 return 0;
2566}
2567
32ecc75d
AR		 2568int pn533_finalize_setup(struct pn533 *dev)
2569{
2570
2571 struct pn533_fw_version fw_ver;
2572 int rc;
2573
2574 memset(&fw_ver, 0, sizeof(fw_ver));
2575
2576 rc = pn533_get_firmware_version(dev, &fw_ver);
2577 if (rc) {
2578 nfc_err(dev->dev, "Unable to get FW version\n");
2579 return rc;
2580 }
2581
2582 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2583 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2584
2585 rc = pn533_setup(dev);
2586 if (rc)
2587 return rc;
2588
2589 return 0;
2590}
2591EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2592
9815c7cf
MT		 2593struct pn533 *pn533_register_device(u32 device_type,
2594 u32 protocols,
2595 enum pn533_protocol_type protocol_type,
2596 void *phy,
2597 struct pn533_phy_ops *phy_ops,
2598 struct pn533_frame_ops *fops,
b16931b1
MT		 2599 struct device *dev,
2600 struct device *parent)
c46ee386 2601{
9815c7cf 2602 struct pn533 *priv;
c46ee386 2603 int rc = -ENOMEM;
c46ee386 2604
9815c7cf
MT		 2605 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2606 if (!priv)
2607 return ERR_PTR(-ENOMEM);
c46ee386 2608
9815c7cf
MT		 2609 priv->phy = phy;
2610 priv->phy_ops = phy_ops;
2611 priv->dev = dev;
2612 if (fops != NULL)
2613 priv->ops = fops;
2614 else
2615 priv->ops = &pn533_std_frame_ops;
2616
2617 priv->protocol_type = protocol_type;
2618 priv->device_type = device_type;
2619
2620 mutex_init(&priv->cmd_lock);
2621
2622 INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2623 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2624 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2625 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2626 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2627 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2628 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2629 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2630 INIT_WORK(&priv->rf_work, pn533_wq_rf);
2631 priv->wq = alloc_ordered_workqueue("pn533", 0);
2632 if (priv->wq == NULL)
4849f85e 2633 goto error;
c46ee386 2634
e99e88a9 2635 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
5c7b0531 2636
9815c7cf
MT		 2637 skb_queue_head_init(&priv->resp_q);
2638 skb_queue_head_init(&priv->fragment_skb);
53cf4839 2639
9815c7cf 2640 INIT_LIST_HEAD(&priv->cmd_queue);
c46ee386 2641
9815c7cf
MT		 2642 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2643 priv->ops->tx_header_len +
e8753043 2644 PN533_CMD_DATAEXCH_HEAD_LEN,
9815c7cf
MT		 2645 priv->ops->tx_tail_len);
2646 if (!priv->nfc_dev) {
4674d0fe 2647 rc = -ENOMEM;
4849f85e 2648 goto destroy_wq;
4674d0fe 2649 }
c46ee386 2650
b16931b1 2651 nfc_set_parent_dev(priv->nfc_dev, parent);
9815c7cf 2652 nfc_set_drvdata(priv->nfc_dev, priv);
c46ee386 2653
9815c7cf 2654 rc = nfc_register_device(priv->nfc_dev);
c46ee386
AAJ		 2655 if (rc)
2656 goto free_nfc_dev;
2657
9815c7cf 2658 return priv;
c46ee386
AAJ		 2659
2660free_nfc_dev:
9815c7cf 2661 nfc_free_device(priv->nfc_dev);
9f2f8ba1 2662
4849f85e 2663destroy_wq:
9815c7cf 2664 destroy_workqueue(priv->wq);
c46ee386 2665error:
9815c7cf
MT		 2666 kfree(priv);
2667 return ERR_PTR(rc);
c46ee386 2668}
9815c7cf 2669EXPORT_SYMBOL_GPL(pn533_register_device);
c46ee386 2670
9815c7cf 2671void pn533_unregister_device(struct pn533 *priv)
c46ee386 2672{
5d50b364 2673 struct pn533_cmd *cmd, *n;
c46ee386 2674
9815c7cf
MT		 2675 nfc_unregister_device(priv->nfc_dev);
2676 nfc_free_device(priv->nfc_dev);
c46ee386 2677
9815c7cf
MT		 2678 flush_delayed_work(&priv->poll_work);
2679 destroy_workqueue(priv->wq);
c46ee386 2680
9815c7cf 2681 skb_queue_purge(&priv->resp_q);
c46ee386 2682
9815c7cf 2683 del_timer(&priv->listen_timer);
c46ee386 2684
9815c7cf 2685 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
5d50b364
SO		 2686 list_del(&cmd->queue);
2687 kfree(cmd);
2688 }
2689
9815c7cf 2690 kfree(priv);
c46ee386 2691}
9815c7cf 2692EXPORT_SYMBOL_GPL(pn533_unregister_device);
c46ee386 2693
c46ee386 2694
e70b96e9
WR		 2695MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2696MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2697MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
9815c7cf 2698MODULE_DESCRIPTION("PN533 driver ver " VERSION);
c46ee386
AAJ		 2699MODULE_VERSION(VERSION);
2700MODULE_LICENSE("GPL");
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