]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/nfc/pn533/pn533.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'mfd-next-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
[mirror_ubuntu-bionic-kernel.git] / drivers / nfc / pn533 / pn533.c
CommitLineData
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
WR		 1008 struct sk_buff *skb;
1009 u8 *felica, *nfcid3, *gb;
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 */
52f2eaee 1035 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1036
1037 /* MIFARE params */
1038 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1039
1040 /* Felica params */
b5193e5d
WR		 1041 felica = skb_put(skb, 18);
1042 memcpy(felica, felica_params, 18);
1043 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1044
1045 /* NFCID3 */
b5193e5d
WR		 1046 nfcid3 = skb_put(skb, 10);
1047 memset(nfcid3, 0, 10);
1048 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1049
1050 /* General bytes */
b5193e5d 1051 *skb_put(skb, 1) = gbytes_len;
51d9e803 1052
b5193e5d
WR		 1053 gb = skb_put(skb, gbytes_len);
1054 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1055
b5193e5d
WR		 1056 /* Len Tk */
1057 *skb_put(skb, 1) = 0;
51d9e803 1058
b5193e5d 1059 return skb;
ad3823ce
SO		 1060}
1061
3c13b244
OG		 1062static void pn533_wq_tm_mi_recv(struct work_struct *work);
1063static struct sk_buff *pn533_build_response(struct pn533 *dev);
1064
103b34cf 1065static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1066 struct sk_buff *resp)
103b34cf 1067{
3c13b244
OG		 1068 struct sk_buff *skb;
1069 u8 status, ret, mi;
1070 int rc;
103b34cf 1071
9815c7cf 1072 dev_dbg(dev->dev, "%s\n", __func__);
103b34cf 1073
3c13b244
OG		 1074 if (IS_ERR(resp)) {
1075 skb_queue_purge(&dev->resp_q);
e4878823 1076 return PTR_ERR(resp);
3c13b244 1077 }
103b34cf 1078
e4878823 1079 status = resp->data[0];
3c13b244
OG		 1080
1081 ret = status & PN533_CMD_RET_MASK;
1082 mi = status & PN533_CMD_MI_MASK;
1083
e4878823 1084 skb_pull(resp, sizeof(status));
103b34cf 1085
3c13b244
OG		 1086 if (ret != PN533_CMD_RET_SUCCESS) {
1087 rc = -EIO;
1088 goto error;
1089 }
1090
1091 skb_queue_tail(&dev->resp_q, resp);
1092
1093 if (mi) {
1094 queue_work(dev->wq, &dev->mi_tm_rx_work);
1095 return -EINPROGRESS;
1096 }
1097
1098 skb = pn533_build_response(dev);
1099 if (!skb) {
1100 rc = -EIO;
1101 goto error;
103b34cf
SO		 1102 }
1103
3c13b244
OG		 1104 return nfc_tm_data_received(dev->nfc_dev, skb);
1105
1106error:
1107 nfc_tm_deactivated(dev->nfc_dev);
1108 dev->tgt_mode = 0;
1109 skb_queue_purge(&dev->resp_q);
1110 dev_kfree_skb(resp);
1111
1112 return rc;
1113}
1114
1115static void pn533_wq_tm_mi_recv(struct work_struct *work)
1116{
1117 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1118 struct sk_buff *skb;
1119 int rc;
1120
9815c7cf 1121 dev_dbg(dev->dev, "%s\n", __func__);
3c13b244
OG		 1122
1123 skb = pn533_alloc_skb(dev, 0);
1124 if (!skb)
1125 return;
1126
1127 rc = pn533_send_cmd_direct_async(dev,
1128 PN533_CMD_TG_GET_DATA,
1129 skb,
1130 pn533_tm_get_data_complete,
1131 NULL);
1132
1133 if (rc < 0)
1134 dev_kfree_skb(skb);
103b34cf
SO		 1135}
1136
93ad4202
OG		 1137static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1138 struct sk_buff *resp);
1139static void pn533_wq_tm_mi_send(struct work_struct *work)
1140{
1141 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1142 struct sk_buff *skb;
1143 int rc;
1144
9815c7cf 1145 dev_dbg(dev->dev, "%s\n", __func__);
93ad4202
OG		 1146
1147 /* Grab the first skb in the queue */
1148 skb = skb_dequeue(&dev->fragment_skb);
1149 if (skb == NULL) { /* No more data */
1150 /* Reset the queue for future use */
1151 skb_queue_head_init(&dev->fragment_skb);
1152 goto error;
1153 }
1154
1155 /* last entry - remove MI bit */
1156 if (skb_queue_len(&dev->fragment_skb) == 0) {
1157 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1158 skb, pn533_tm_send_complete, NULL);
1159 } else
1160 rc = pn533_send_cmd_direct_async(dev,
1161 PN533_CMD_TG_SET_META_DATA,
1162 skb, pn533_tm_send_complete, NULL);
1163
1164 if (rc == 0) /* success */
1165 return;
1166
9815c7cf 1167 dev_err(dev->dev,
93ad4202
OG		 1168 "Error %d when trying to perform set meta data_exchange", rc);
1169
1170 dev_kfree_skb(skb);
1171
1172error:
9815c7cf 1173 dev->phy_ops->send_ack(dev, GFP_KERNEL);
93ad4202
OG		 1174 queue_work(dev->wq, &dev->cmd_work);
1175}
1176
103b34cf
SO		 1177static void pn533_wq_tg_get_data(struct work_struct *work)
1178{
1179 struct pn533 *dev = container_of(work, struct pn533, tg_work);
e4878823
WR		 1180 struct sk_buff *skb;
1181 int rc;
103b34cf 1182
9815c7cf 1183 dev_dbg(dev->dev, "%s\n", __func__);
103b34cf 1184
9e2d493e 1185 skb = pn533_alloc_skb(dev, 0);
e4878823 1186 if (!skb)
103b34cf
SO		 1187 return;
1188
e4878823
WR		 1189 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1190 pn533_tm_get_data_complete, NULL);
103b34cf 1191
e4878823
WR		 1192 if (rc < 0)
1193 dev_kfree_skb(skb);
103b34cf
SO		 1194}
1195
fc40a8c1 1196#define ATR_REQ_GB_OFFSET 17
b5193e5d 1197static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1198{
b5193e5d 1199 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1200 size_t gb_len;
103b34cf 1201 int rc;
ad3823ce 1202
9815c7cf 1203 dev_dbg(dev->dev, "%s\n", __func__);
ad3823ce 1204
b5193e5d 1205 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1206 return -EINVAL;
1207
b5193e5d
WR		 1208 mode = resp->data[0];
1209 cmd = &resp->data[1];
ad3823ce 1210
9815c7cf 1211 dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
b4834839 1212 mode, resp->len);
ad3823ce 1213
b5193e5d
WR		 1214 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1215 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1216 comm_mode = NFC_COMM_ACTIVE;
1217
b5193e5d 1218 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1219 return -EOPNOTSUPP;
1220
b5193e5d
WR		 1221 gb = cmd + ATR_REQ_GB_OFFSET;
1222 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1223
103b34cf
SO		 1224 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1225 comm_mode, gb, gb_len);
1226 if (rc < 0) {
9815c7cf 1227 nfc_err(dev->dev,
073a625f 1228 "Error when signaling target activation\n");
103b34cf
SO		 1229 return rc;
1230 }
1231
51ad304c 1232 dev->tgt_mode = 1;
103b34cf
SO		 1233 queue_work(dev->wq, &dev->tg_work);
1234
1235 return 0;
fe7c5800
SO		 1236}
1237
6fbbdc16 1238static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1239{
37cf4fc6 1240 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16 1241
9815c7cf 1242 dev_dbg(dev->dev, "Listen mode timeout\n");
6fbbdc16 1243
6fbbdc16
SO		 1244 dev->cancel_listen = 1;
1245
6fbbdc16
SO		 1246 pn533_poll_next_mod(dev);
1247
46f793b0
SO		 1248 queue_delayed_work(dev->wq, &dev->poll_work,
1249 msecs_to_jiffies(PN533_POLL_INTERVAL));
6fbbdc16
SO		 1250}
1251
17e9d9d4
SO		 1252static int pn533_rf_complete(struct pn533 *dev, void *arg,
1253 struct sk_buff *resp)
1254{
1255 int rc = 0;
1256
9815c7cf 1257 dev_dbg(dev->dev, "%s\n", __func__);
17e9d9d4
SO		 1258
1259 if (IS_ERR(resp)) {
1260 rc = PTR_ERR(resp);
1261
9815c7cf 1262 nfc_err(dev->dev, "RF setting error %d\n", rc);
17e9d9d4
SO		 1263
1264 return rc;
1265 }
1266
46f793b0
SO		 1267 queue_delayed_work(dev->wq, &dev->poll_work,
1268 msecs_to_jiffies(PN533_POLL_INTERVAL));
17e9d9d4
SO		 1269
1270 dev_kfree_skb(resp);
1271 return rc;
1272}
1273
1274static void pn533_wq_rf(struct work_struct *work)
1275{
1276 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1277 struct sk_buff *skb;
1278 int rc;
1279
9815c7cf 1280 dev_dbg(dev->dev, "%s\n", __func__);
17e9d9d4
SO		 1281
1282 skb = pn533_alloc_skb(dev, 2);
1283 if (!skb)
1284 return;
1285
1286 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
3a8eab39 1287 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
17e9d9d4
SO		 1288
1289 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1290 pn533_rf_complete, NULL);
1291 if (rc < 0) {
1292 dev_kfree_skb(skb);
9815c7cf 1293 nfc_err(dev->dev, "RF setting error %d\n", rc);
17e9d9d4 1294 }
17e9d9d4
SO		 1295}
1296
673088fb
SO		 1297static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1298 struct sk_buff *resp)
1299{
1300 struct pn533_cmd_jump_dep_response *rsp;
1301 struct nfc_target nfc_target;
1302 u8 target_gt_len;
1303 int rc;
1304
1305 if (IS_ERR(resp))
1306 return PTR_ERR(resp);
1307
1308 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1309
1310 rc = rsp->status & PN533_CMD_RET_MASK;
1311 if (rc != PN533_CMD_RET_SUCCESS) {
1312 /* Not target found, turn radio off */
1313 queue_work(dev->wq, &dev->rf_work);
1314
1315 dev_kfree_skb(resp);
1316 return 0;
1317 }
1318
9815c7cf 1319 dev_dbg(dev->dev, "Creating new target");
673088fb
SO		 1320
1321 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1322 nfc_target.nfcid1_len = 10;
1323 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1324 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1325 if (rc)
1326 goto error;
1327
1328 dev->tgt_available_prots = 0;
1329 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1330
1331 /* ATR_RES general bytes are located at offset 17 */
1332 target_gt_len = resp->len - 17;
1333 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1334 rsp->gt, target_gt_len);
1335 if (!rc) {
1336 rc = nfc_dep_link_is_up(dev->nfc_dev,
1337 dev->nfc_dev->targets[0].idx,
1338 0, NFC_RF_INITIATOR);
1339
1340 if (!rc)
1341 pn533_poll_reset_mod_list(dev);
1342 }
1343error:
1344 dev_kfree_skb(resp);
1345 return rc;
1346}
1347
1348#define PASSIVE_DATA_LEN 5
1349static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1350{
1351 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1352 struct sk_buff *skb;
1353 int rc, skb_len;
1354 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1355 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1356
9815c7cf 1357 dev_dbg(dev->dev, "%s", __func__);
673088fb
SO		 1358
1359 if (!dev->gb) {
1360 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1361
1362 if (!dev->gb || !dev->gb_len) {
1363 dev->poll_dep = 0;
1364 queue_work(dev->wq, &dev->rf_work);
1365 }
1366 }
1367
1368 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1369 skb_len += PASSIVE_DATA_LEN;
1370
1371 /* NFCID3 */
1372 skb_len += NFC_NFCID3_MAXSIZE;
1373 nfcid3[0] = 0x1;
1374 nfcid3[1] = 0xfe;
1375 get_random_bytes(nfcid3 + 2, 6);
1376
1377 skb = pn533_alloc_skb(dev, skb_len);
1378 if (!skb)
1379 return -ENOMEM;
1380
1381 *skb_put(skb, 1) = 0x01; /* Active */
1382 *skb_put(skb, 1) = 0x02; /* 424 kbps */
1383
1384 next = skb_put(skb, 1); /* Next */
1385 *next = 0;
1386
1387 /* Copy passive data */
1388 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
1389 *next |= 1;
1390
1391 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1392 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
1393 NFC_NFCID3_MAXSIZE);
1394 *next |= 2;
1395
1396 memcpy(skb_put(skb, dev->gb_len), dev->gb, dev->gb_len);
1397 *next |= 4; /* We have some Gi */
1398
1399 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1400 pn533_poll_dep_complete, NULL);
1401
1402 if (rc < 0)
1403 dev_kfree_skb(skb);
1404
1405 return rc;
1406}
1407
6fbbdc16 1408static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1409 struct sk_buff *resp)
6fbbdc16
SO		 1410{
1411 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1412 int rc;
1413
9815c7cf 1414 dev_dbg(dev->dev, "%s\n", __func__);
ad3823ce 1415
b5193e5d
WR		 1416 if (IS_ERR(resp)) {
1417 rc = PTR_ERR(resp);
1418
9815c7cf 1419 nfc_err(dev->dev, "%s Poll complete error %d\n",
073a625f 1420 __func__, rc);
b5193e5d
WR		 1421
1422 if (rc == -ENOENT) {
1423 if (dev->poll_mod_count != 0)
1424 return rc;
9815c7cf 1425 goto stop_poll;
b5193e5d 1426 } else if (rc < 0) {
9815c7cf 1427 nfc_err(dev->dev,
073a625f 1428 "Error %d when running poll\n", rc);
b5193e5d
WR		 1429 goto stop_poll;
1430 }
6fbbdc16 1431 }
ad3823ce 1432
6fbbdc16
SO		 1433 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1434
b5193e5d 1435 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1436 del_timer(&dev->listen_timer);
b5193e5d
WR		 1437 rc = pn533_init_target_complete(dev, resp);
1438 goto done;
6fbbdc16
SO		 1439 }
1440
b5193e5d
WR		 1441 /* Initiator mode */
1442 rc = pn533_start_poll_complete(dev, resp);
1443 if (!rc)
1444 goto done;
6fbbdc16 1445
95cb9e10 1446 if (!dev->poll_mod_count) {
9815c7cf 1447 dev_dbg(dev->dev, "Polling has been stopped\n");
95cb9e10
WR		 1448 goto done;
1449 }
1450
b5193e5d 1451 pn533_poll_next_mod(dev);
17e9d9d4
SO		 1452 /* Not target found, turn radio off */
1453 queue_work(dev->wq, &dev->rf_work);
6fbbdc16 1454
b5193e5d
WR		 1455done:
1456 dev_kfree_skb(resp);
1457 return rc;
6fbbdc16
SO		 1458
1459stop_poll:
9815c7cf 1460 nfc_err(dev->dev, "Polling operation has been stopped\n");
b5193e5d 1461
6fbbdc16
SO		 1462 pn533_poll_reset_mod_list(dev);
1463 dev->poll_protocols = 0;
b5193e5d 1464 return rc;
ad3823ce
SO		 1465}
1466
9e2d493e
WR		 1467static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1468 struct pn533_poll_modulations *mod)
c46ee386 1469{
b5193e5d 1470 struct sk_buff *skb;
c46ee386 1471
9e2d493e 1472 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1473 if (!skb)
1474 return NULL;
c46ee386 1475
b5193e5d 1476 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1477
b5193e5d 1478 return skb;
6fbbdc16 1479}
c46ee386 1480
6fbbdc16
SO		 1481static int pn533_send_poll_frame(struct pn533 *dev)
1482{
b5193e5d
WR		 1483 struct pn533_poll_modulations *mod;
1484 struct sk_buff *skb;
6fbbdc16 1485 int rc;
b5193e5d 1486 u8 cmd_code;
c46ee386 1487
b5193e5d 1488 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1489
9815c7cf 1490 dev_dbg(dev->dev, "%s mod len %d\n",
b4834839 1491 __func__, mod->len);
c46ee386 1492
e997ebbe 1493 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
673088fb
SO		 1494 dev->poll_dep = 0;
1495 return pn533_poll_dep(dev->nfc_dev);
1496 }
1497
b5193e5d
WR		 1498 if (mod->len == 0) { /* Listen mode */
1499 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1500 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1501 } else { /* Polling mode */
1502 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1503 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1504 }
1505
1506 if (!skb) {
9815c7cf 1507 nfc_err(dev->dev, "Failed to allocate skb\n");
b5193e5d
WR		 1508 return -ENOMEM;
1509 }
1510
1511 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1512 NULL);
1513 if (rc < 0) {
1514 dev_kfree_skb(skb);
9815c7cf 1515 nfc_err(dev->dev, "Polling loop error %d\n", rc);
b5193e5d 1516 }
c46ee386 1517
6fbbdc16
SO		 1518 return rc;
1519}
1520
1521static void pn533_wq_poll(struct work_struct *work)
1522{
46f793b0 1523 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
6fbbdc16
SO		 1524 struct pn533_poll_modulations *cur_mod;
1525 int rc;
1526
1527 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1528
9815c7cf 1529 dev_dbg(dev->dev,
b4834839
JP		 1530 "%s cancel_listen %d modulation len %d\n",
1531 __func__, dev->cancel_listen, cur_mod->len);
6fbbdc16
SO		 1532
1533 if (dev->cancel_listen == 1) {
1534 dev->cancel_listen = 0;
9815c7cf 1535 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1536 }
1537
6fbbdc16
SO		 1538 rc = pn533_send_poll_frame(dev);
1539 if (rc)
1540 return;
c46ee386 1541
6fbbdc16
SO		 1542 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1543 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386
AAJ		 1544}
1545
fe7c5800
SO		 1546static int pn533_start_poll(struct nfc_dev *nfc_dev,
1547 u32 im_protocols, u32 tm_protocols)
1548{
1549 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cec4b8ed 1550 struct pn533_poll_modulations *cur_mod;
dfccd0f5 1551 u8 rand_mod;
cec4b8ed 1552 int rc;
fe7c5800 1553
9815c7cf 1554 dev_dbg(dev->dev,
b4834839
JP		 1555 "%s: im protocols 0x%x tm protocols 0x%x\n",
1556 __func__, im_protocols, tm_protocols);
fe7c5800
SO		 1557
1558 if (dev->tgt_active_prot) {
9815c7cf 1559 nfc_err(dev->dev,
073a625f 1560 "Cannot poll with a target already activated\n");
fe7c5800
SO		 1561 return -EBUSY;
1562 }
1563
51ad304c 1564 if (dev->tgt_mode) {
9815c7cf 1565 nfc_err(dev->dev,
073a625f 1566 "Cannot poll while already being activated\n");
51ad304c
SO		 1567 return -EBUSY;
1568 }
1569
6fbbdc16
SO		 1570 if (tm_protocols) {
1571 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1572 if (dev->gb == NULL)
1573 tm_protocols = 0;
1574 }
ad3823ce 1575
6fbbdc16
SO		 1576 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1577 dev->poll_protocols = im_protocols;
1578 dev->listen_protocols = tm_protocols;
ad3823ce 1579
dfccd0f5
SO		 1580 /* Do not always start polling from the same modulation */
1581 get_random_bytes(&rand_mod, sizeof(rand_mod));
1582 rand_mod %= dev->poll_mod_count;
1583 dev->poll_mod_curr = rand_mod;
1584
cec4b8ed
SO		 1585 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1586
1587 rc = pn533_send_poll_frame(dev);
1588
1589 /* Start listen timer */
1590 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1591 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1592
1593 return rc;
fe7c5800
SO		 1594}
1595
c46ee386
AAJ		 1596static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1597{
1598 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1599
6fbbdc16
SO		 1600 del_timer(&dev->listen_timer);
1601
c46ee386 1602 if (!dev->poll_mod_count) {
9815c7cf 1603 dev_dbg(dev->dev,
b4834839 1604 "Polling operation was not running\n");
c46ee386
AAJ		 1605 return;
1606 }
1607
9815c7cf 1608 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
46f793b0 1609 flush_delayed_work(&dev->poll_work);
7c2a04a9 1610 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1611}
1612
1613static int pn533_activate_target_nfcdep(struct pn533 *dev)
1614{
cb950d93 1615 struct pn533_cmd_activate_response *rsp;
541d920b 1616 u16 gt_len;
c46ee386 1617 int rc;
cb950d93
WR		 1618 struct sk_buff *skb;
1619 struct sk_buff *resp;
c46ee386 1620
9815c7cf 1621 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386 1622
9e2d493e 1623 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1624 if (!skb)
1625 return -ENOMEM;
c46ee386 1626
cb950d93
WR		 1627 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1628 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1629
cb950d93
WR		 1630 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1631 if (IS_ERR(resp))
1632 return PTR_ERR(resp);
c46ee386 1633
37cf4fc6 1634 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1635 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1636 if (rc != PN533_CMD_RET_SUCCESS) {
9815c7cf 1637 nfc_err(dev->dev,
073a625f 1638 "Target activation failed (error 0x%x)\n", rc);
cb950d93 1639 dev_kfree_skb(resp);
c46ee386 1640 return -EIO;
8a0ecfe7 1641 }
c46ee386 1642
541d920b 1643 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1644 gt_len = resp->len - 16;
1645 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1646
cb950d93 1647 dev_kfree_skb(resp);
541d920b 1648 return rc;
c46ee386
AAJ		 1649}
1650
90099433
EL		 1651static int pn533_activate_target(struct nfc_dev *nfc_dev,
1652 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1653{
1654 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1655 int rc;
1656
9815c7cf 1657 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
c46ee386
AAJ		 1658
1659 if (dev->poll_mod_count) {
9815c7cf 1660 nfc_err(dev->dev,
b4834839 1661 "Cannot activate while polling\n");
c46ee386
AAJ		 1662 return -EBUSY;
1663 }
1664
1665 if (dev->tgt_active_prot) {
9815c7cf 1666 nfc_err(dev->dev,
073a625f 1667 "There is already an active target\n");
c46ee386
AAJ		 1668 return -EBUSY;
1669 }
1670
1671 if (!dev->tgt_available_prots) {
9815c7cf 1672 nfc_err(dev->dev,
073a625f 1673 "There is no available target to activate\n");
c46ee386
AAJ		 1674 return -EINVAL;
1675 }
1676
1677 if (!(dev->tgt_available_prots & (1 << protocol))) {
9815c7cf 1678 nfc_err(dev->dev,
073a625f
JP		 1679 "Target doesn't support requested proto %u\n",
1680 protocol);
c46ee386
AAJ		 1681 return -EINVAL;
1682 }
1683
1684 if (protocol == NFC_PROTO_NFC_DEP) {
1685 rc = pn533_activate_target_nfcdep(dev);
1686 if (rc) {
9815c7cf 1687 nfc_err(dev->dev,
073a625f 1688 "Activating target with DEP failed %d\n", rc);
c46ee386
AAJ		 1689 return rc;
1690 }
1691 }
1692
1693 dev->tgt_active_prot = protocol;
1694 dev->tgt_available_prots = 0;
1695
1696 return 0;
1697}
1698
37f895d7
MT		 1699static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1700 struct sk_buff *resp)
1701{
1702 int rc = 0;
1703
9815c7cf 1704 dev_dbg(dev->dev, "%s\n", __func__);
37f895d7
MT		 1705
1706 if (IS_ERR(resp)) {
1707 rc = PTR_ERR(resp);
1708
9815c7cf 1709 nfc_err(dev->dev, "Target release error %d\n", rc);
37f895d7
MT		 1710
1711 return rc;
1712 }
1713
1714 rc = resp->data[0] & PN533_CMD_RET_MASK;
1715 if (rc != PN533_CMD_RET_SUCCESS)
9815c7cf 1716 nfc_err(dev->dev,
37f895d7
MT		 1717 "Error 0x%x when releasing the target\n", rc);
1718
1719 dev_kfree_skb(resp);
1720 return rc;
1721}
1722
90099433 1723static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
96d4581f 1724 struct nfc_target *target, u8 mode)
c46ee386
AAJ		 1725{
1726 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93 1727 struct sk_buff *skb;
c46ee386
AAJ		 1728 int rc;
1729
9815c7cf 1730 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386
AAJ		 1731
1732 if (!dev->tgt_active_prot) {
9815c7cf 1733 nfc_err(dev->dev, "There is no active target\n");
c46ee386
AAJ		 1734 return;
1735 }
1736
1737 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1738 skb_queue_purge(&dev->resp_q);
1739
9e2d493e 1740 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 1741 if (!skb)
1742 return;
c46ee386 1743
cb950d93 1744 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1745
37f895d7
MT		 1746 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1747 pn533_deactivate_target_complete, NULL);
1748 if (rc < 0) {
1749 dev_kfree_skb(skb);
9815c7cf 1750 nfc_err(dev->dev, "Target release error %d\n", rc);
37f895d7 1751 }
c46ee386
AAJ		 1752}
1753
361f3cb7
SO		 1754
1755static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1756 struct sk_buff *resp)
361f3cb7 1757{
13003649 1758 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1759 u8 target_gt_len;
1760 int rc;
13003649 1761 u8 active = *(u8 *)arg;
70418e6e
WR		 1762
1763 kfree(arg);
361f3cb7 1764
13003649
WR		 1765 if (IS_ERR(resp))
1766 return PTR_ERR(resp);
361f3cb7
SO		 1767
1768 if (dev->tgt_available_prots &&
1769 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
9815c7cf 1770 nfc_err(dev->dev,
073a625f 1771 "The target does not support DEP\n");
13003649
WR		 1772 rc = -EINVAL;
1773 goto error;
361f3cb7
SO		 1774 }
1775
13003649
WR		 1776 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1777
1778 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7 1779 if (rc != PN533_CMD_RET_SUCCESS) {
9815c7cf 1780 nfc_err(dev->dev,
073a625f 1781 "Bringing DEP link up failed (error 0x%x)\n", rc);
13003649 1782 goto error;
361f3cb7
SO		 1783 }
1784
1785 if (!dev->tgt_available_prots) {
13003649
WR		 1786 struct nfc_target nfc_target;
1787
9815c7cf 1788 dev_dbg(dev->dev, "Creating new target\n");
361f3cb7
SO		 1789
1790 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1791 nfc_target.nfcid1_len = 10;
13003649 1792 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1793 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1794 if (rc)
13003649 1795 goto error;
361f3cb7
SO		 1796
1797 dev->tgt_available_prots = 0;
1798 }
1799
1800 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1801
1802 /* ATR_RES general bytes are located at offset 17 */
13003649 1803 target_gt_len = resp->len - 17;
361f3cb7 1804 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1805 rsp->gt, target_gt_len);
361f3cb7
SO		 1806 if (rc == 0)
1807 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1808 dev->nfc_dev->targets[0].idx,
1809 !active, NFC_RF_INITIATOR);
361f3cb7 1810
13003649
WR		 1811error:
1812 dev_kfree_skb(resp);
1813 return rc;
361f3cb7
SO		 1814}
1815
17e9d9d4 1816static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
90099433 1817static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1818 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1819{
1820 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649 1821 struct sk_buff *skb;
5eef4845
SO		 1822 int rc, skb_len;
1823 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
d7f3345d 1824 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7 1825
9815c7cf 1826 dev_dbg(dev->dev, "%s\n", __func__);
361f3cb7 1827
361f3cb7 1828 if (dev->poll_mod_count) {
9815c7cf 1829 nfc_err(dev->dev,
073a625f 1830 "Cannot bring the DEP link up while polling\n");
361f3cb7
SO		 1831 return -EBUSY;
1832 }
1833
1834 if (dev->tgt_active_prot) {
9815c7cf 1835 nfc_err(dev->dev,
073a625f 1836 "There is already an active target\n");
361f3cb7
SO		 1837 return -EBUSY;
1838 }
1839
13003649 1840 skb_len = 3 + gb_len; /* ActPass + BR + Next */
5eef4845 1841 skb_len += PASSIVE_DATA_LEN;
d7f3345d 1842
5eef4845
SO		 1843 /* NFCID3 */
1844 skb_len += NFC_NFCID3_MAXSIZE;
1845 if (target && !target->nfcid2_len) {
1846 nfcid3[0] = 0x1;
1847 nfcid3[1] = 0xfe;
1848 get_random_bytes(nfcid3 + 2, 6);
1849 }
322bce95 1850
9e2d493e 1851 skb = pn533_alloc_skb(dev, skb_len);
13003649 1852 if (!skb)
361f3cb7
SO		 1853 return -ENOMEM;
1854
13003649 1855 *skb_put(skb, 1) = !comm_mode; /* ActPass */
5eef4845 1856 *skb_put(skb, 1) = 0x02; /* 424 kbps */
13003649
WR		 1857
1858 next = skb_put(skb, 1); /* Next */
1859 *next = 0;
361f3cb7 1860
5eef4845
SO		 1861 /* Copy passive data */
1862 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
1863 *next |= 1;
d7f3345d 1864
5eef4845
SO		 1865 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1866 if (target && target->nfcid2_len)
322bce95
SO		 1867 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
1868 target->nfcid2_len);
5eef4845
SO		 1869 else
1870 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
1871 NFC_NFCID3_MAXSIZE);
1872 *next |= 2;
322bce95 1873
47807d3d 1874 if (gb != NULL && gb_len > 0) {
13003649
WR		 1875 memcpy(skb_put(skb, gb_len), gb, gb_len);
1876 *next |= 4; /* We have some Gi */
361f3cb7 1877 } else {
13003649 1878 *next = 0;
361f3cb7
SO		 1879 }
1880
13003649
WR		 1881 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1882 if (!arg) {
1883 dev_kfree_skb(skb);
1884 return -ENOMEM;
1885 }
361f3cb7 1886
13003649 1887 *arg = !comm_mode;
361f3cb7 1888
17e9d9d4
SO		 1889 pn533_rf_field(dev->nfc_dev, 0);
1890
13003649
WR		 1891 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1892 pn533_in_dep_link_up_complete, arg);
1893
1894 if (rc < 0) {
1895 dev_kfree_skb(skb);
1896 kfree(arg);
1897 }
361f3cb7
SO		 1898
1899 return rc;
1900}
1901
1902static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1903{
6fbbdc16
SO		 1904 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1905
9815c7cf 1906 dev_dbg(dev->dev, "%s\n", __func__);
fcfafc76 1907
6fbbdc16
SO		 1908 pn533_poll_reset_mod_list(dev);
1909
10cff29a 1910 if (dev->tgt_mode || dev->tgt_active_prot)
9815c7cf 1911 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 1912
1913 dev->tgt_active_prot = 0;
1914 dev->tgt_mode = 0;
1915
1916 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 1917
1918 return 0;
1919}
1920
c46ee386 1921struct pn533_data_exchange_arg {
c46ee386
AAJ		 1922 data_exchange_cb_t cb;
1923 void *cb_context;
1924};
1925
6ff73fd2
SO		 1926static struct sk_buff *pn533_build_response(struct pn533 *dev)
1927{
1928 struct sk_buff *skb, *tmp, *t;
1929 unsigned int skb_len = 0, tmp_len = 0;
1930
9815c7cf 1931 dev_dbg(dev->dev, "%s\n", __func__);
6ff73fd2
SO		 1932
1933 if (skb_queue_empty(&dev->resp_q))
1934 return NULL;
1935
1936 if (skb_queue_len(&dev->resp_q) == 1) {
1937 skb = skb_dequeue(&dev->resp_q);
1938 goto out;
1939 }
1940
1941 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1942 skb_len += tmp->len;
1943
9815c7cf 1944 dev_dbg(dev->dev, "%s total length %d\n",
b4834839 1945 __func__, skb_len);
6ff73fd2
SO		 1946
1947 skb = alloc_skb(skb_len, GFP_KERNEL);
1948 if (skb == NULL)
1949 goto out;
1950
1951 skb_put(skb, skb_len);
1952
1953 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1954 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1955 tmp_len += tmp->len;
1956 }
1957
1958out:
1959 skb_queue_purge(&dev->resp_q);
1960
1961 return skb;
1962}
1963
c46ee386 1964static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 1965 struct sk_buff *resp)
c46ee386
AAJ		 1966{
1967 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 1968 struct sk_buff *skb;
1969 int rc = 0;
1970 u8 status, ret, mi;
c46ee386 1971
9815c7cf 1972 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386 1973
b1e666f5
WR		 1974 if (IS_ERR(resp)) {
1975 rc = PTR_ERR(resp);
1976 goto _error;
c46ee386
AAJ		 1977 }
1978
b1e666f5
WR		 1979 status = resp->data[0];
1980 ret = status & PN533_CMD_RET_MASK;
1981 mi = status & PN533_CMD_MI_MASK;
1982
1983 skb_pull(resp, sizeof(status));
c46ee386 1984
b1e666f5 1985 if (ret != PN533_CMD_RET_SUCCESS) {
9815c7cf 1986 nfc_err(dev->dev,
073a625f 1987 "Exchanging data failed (error 0x%x)\n", ret);
b1e666f5 1988 rc = -EIO;
c46ee386
AAJ		 1989 goto error;
1990 }
1991
b1e666f5 1992 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 1993
b1e666f5
WR		 1994 if (mi) {
1995 dev->cmd_complete_mi_arg = arg;
963a82e0
OG		 1996 queue_work(dev->wq, &dev->mi_rx_work);
1997 return -EINPROGRESS;
1998 }
1999
2000 /* Prepare for the next round */
2001 if (skb_queue_len(&dev->fragment_skb) > 0) {
2002 dev->cmd_complete_dep_arg = arg;
2003 queue_work(dev->wq, &dev->mi_tx_work);
2004
6ff73fd2 2005 return -EINPROGRESS;
c46ee386
AAJ		 2006 }
2007
6ff73fd2 2008 skb = pn533_build_response(dev);
5df848f3
JL		 2009 if (!skb) {
2010 rc = -ENOMEM;
6ff73fd2 2011 goto error;
5df848f3 2012 }
c46ee386 2013
6ff73fd2 2014 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2015 kfree(arg);
2016 return 0;
2017
2018error:
b1e666f5
WR		 2019 dev_kfree_skb(resp);
2020_error:
6ff73fd2 2021 skb_queue_purge(&dev->resp_q);
b1e666f5 2022 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2023 kfree(arg);
b1e666f5 2024 return rc;
c46ee386
AAJ		 2025}
2026
9815c7cf
MT		 2027/*
2028 * Receive an incoming pn533 frame. skb contains only header and payload.
2029 * If skb == NULL, it is a notification that the link below is dead.
2030 */
2031void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2032{
b31d5103
MT		 2033 if (!dev->cmd)
2034 goto sched_wq;
2035
9815c7cf
MT		 2036 dev->cmd->status = status;
2037
b31d5103
MT		 2038 if (status != 0) {
2039 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2040 goto sched_wq;
2041 }
2042
9815c7cf
MT		 2043 if (skb == NULL) {
2044 pr_err("NULL Frame -> link is dead\n");
2045 goto sched_wq;
2046 }
2047
2048 if (pn533_rx_frame_is_ack(skb->data)) {
2049 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2050 dev_kfree_skb(skb);
2051 return;
2052 }
2053
2054 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2055 dev->ops->rx_frame_size(skb->data), false);
2056
2057 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2058 nfc_err(dev->dev, "Received an invalid frame\n");
2059 dev->cmd->status = -EIO;
2060 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2061 nfc_err(dev->dev, "It it not the response to the last command\n");
2062 dev->cmd->status = -EIO;
2063 }
2064
2065 dev->cmd->resp = skb;
2066
2067sched_wq:
2068 queue_work(dev->wq, &dev->cmd_complete_work);
2069}
2070EXPORT_SYMBOL(pn533_recv_frame);
2071
963a82e0
OG		 2072/* Split the Tx skb into small chunks */
2073static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2074{
2075 struct sk_buff *frag;
2076 int frag_size;
2077
2078 do {
2079 /* Remaining size */
2080 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2081 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2082 else
2083 frag_size = skb->len;
2084
2085 /* Allocate and reserve */
2086 frag = pn533_alloc_skb(dev, frag_size);
2087 if (!frag) {
2088 skb_queue_purge(&dev->fragment_skb);
2089 break;
2090 }
2091
22953f93
OG		 2092 if (!dev->tgt_mode) {
2093 /* Reserve the TG/MI byte */
2094 skb_reserve(frag, 1);
2095
2096 /* MI + TG */
2097 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2098 *skb_push(frag, sizeof(u8)) =
2099 (PN533_CMD_MI_MASK | 1);
2100 else
2101 *skb_push(frag, sizeof(u8)) = 1; /* TG */
2102 }
963a82e0
OG		 2103
2104 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2105
2106 /* Reduce the size of incoming buffer */
2107 skb_pull(skb, frag_size);
2108
2109 /* Add this to skb_queue */
2110 skb_queue_tail(&dev->fragment_skb, frag);
2111
2112 } while (skb->len > 0);
2113
2114 dev_kfree_skb(skb);
2115
2116 return skb_queue_len(&dev->fragment_skb);
2117}
2118
be9ae4ce
SO		 2119static int pn533_transceive(struct nfc_dev *nfc_dev,
2120 struct nfc_target *target, struct sk_buff *skb,
2121 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2122{
2123 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2124 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2125 int rc;
2126
9815c7cf 2127 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386
AAJ		 2128
2129 if (!dev->tgt_active_prot) {
9815c7cf 2130 nfc_err(dev->dev,
073a625f 2131 "Can't exchange data if there is no active target\n");
c46ee386
AAJ		 2132 rc = -EINVAL;
2133 goto error;
2134 }
2135
b1e666f5 2136 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2137 if (!arg) {
2138 rc = -ENOMEM;
b1e666f5 2139 goto error;
c46ee386
AAJ		 2140 }
2141
c46ee386
AAJ		 2142 arg->cb = cb;
2143 arg->cb_context = cb_context;
2144
b1e666f5
WR		 2145 switch (dev->device_type) {
2146 case PN533_DEVICE_PASORI:
2147 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2148 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2149 skb,
2150 pn533_data_exchange_complete,
2151 arg);
2152
2153 break;
2154 }
2155 default:
963a82e0
OG		 2156 /* jumbo frame ? */
2157 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2158 rc = pn533_fill_fragment_skbs(dev, skb);
2159 if (rc <= 0)
2160 goto error;
2161
2162 skb = skb_dequeue(&dev->fragment_skb);
2163 if (!skb) {
2164 rc = -EIO;
2165 goto error;
2166 }
2167 } else {
2168 *skb_push(skb, sizeof(u8)) = 1; /* TG */
2169 }
b1e666f5
WR		 2170
2171 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2172 skb, pn533_data_exchange_complete,
2173 arg);
2174
2175 break;
c46ee386
AAJ		 2176 }
2177
b1e666f5
WR		 2178 if (rc < 0) /* rc from send_async */
2179 goto error;
2180
c46ee386
AAJ		 2181 return 0;
2182
c46ee386 2183error:
b1e666f5
WR		 2184 kfree(arg);
2185 dev_kfree_skb(skb);
c46ee386
AAJ		 2186 return rc;
2187}
2188
dadb06f2 2189static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2190 struct sk_buff *resp)
dadb06f2 2191{
e4878823 2192 u8 status;
5b412fd1 2193
9815c7cf 2194 dev_dbg(dev->dev, "%s\n", __func__);
dadb06f2 2195
e4878823
WR		 2196 if (IS_ERR(resp))
2197 return PTR_ERR(resp);
5b412fd1 2198
e4878823 2199 status = resp->data[0];
dadb06f2 2200
93ad4202
OG		 2201 /* Prepare for the next round */
2202 if (skb_queue_len(&dev->fragment_skb) > 0) {
2203 queue_work(dev->wq, &dev->mi_tm_tx_work);
2204 return -EINPROGRESS;
2205 }
e4878823 2206 dev_kfree_skb(resp);
dadb06f2 2207
e4878823 2208 if (status != 0) {
dadb06f2
SO		 2209 nfc_tm_deactivated(dev->nfc_dev);
2210
51ad304c
SO		 2211 dev->tgt_mode = 0;
2212
dadb06f2
SO		 2213 return 0;
2214 }
2215
2216 queue_work(dev->wq, &dev->tg_work);
2217
2218 return 0;
2219}
2220
2221static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2222{
2223 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2224 int rc;
2225
9815c7cf 2226 dev_dbg(dev->dev, "%s\n", __func__);
dadb06f2 2227
93ad4202 2228 /* let's split in multiple chunks if size's too big */
e4878823 2229 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
93ad4202
OG		 2230 rc = pn533_fill_fragment_skbs(dev, skb);
2231 if (rc <= 0)
2232 goto error;
2233
2234 /* get the first skb */
2235 skb = skb_dequeue(&dev->fragment_skb);
2236 if (!skb) {
2237 rc = -EIO;
2238 goto error;
2239 }
2240
2241 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2242 pn533_tm_send_complete, NULL);
2243 } else {
2244 /* Send th skb */
2245 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2246 pn533_tm_send_complete, NULL);
dadb06f2
SO		 2247 }
2248
93ad4202
OG		 2249error:
2250 if (rc < 0) {
e4878823 2251 dev_kfree_skb(skb);
93ad4202
OG		 2252 skb_queue_purge(&dev->fragment_skb);
2253 }
dadb06f2
SO		 2254
2255 return rc;
2256}
2257
6ff73fd2
SO		 2258static void pn533_wq_mi_recv(struct work_struct *work)
2259{
963a82e0 2260 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
b1e666f5 2261 struct sk_buff *skb;
6ff73fd2
SO		 2262 int rc;
2263
9815c7cf 2264 dev_dbg(dev->dev, "%s\n", __func__);
6ff73fd2 2265
9e2d493e 2266 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2267 if (!skb)
2268 goto error;
6ff73fd2 2269
b1e666f5
WR		 2270 switch (dev->device_type) {
2271 case PN533_DEVICE_PASORI:
2272 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2273 rc = pn533_send_cmd_direct_async(dev,
2274 PN533_CMD_IN_COMM_THRU,
2275 skb,
2276 pn533_data_exchange_complete,
2277 dev->cmd_complete_mi_arg);
6ff73fd2 2278
b1e666f5
WR		 2279 break;
2280 }
2281 default:
2282 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2283
b1e666f5
WR		 2284 rc = pn533_send_cmd_direct_async(dev,
2285 PN533_CMD_IN_DATA_EXCHANGE,
2286 skb,
2287 pn533_data_exchange_complete,
2288 dev->cmd_complete_mi_arg);
b1bb290a 2289
b1e666f5 2290 break;
6ff73fd2
SO		 2291 }
2292
b1e666f5 2293 if (rc == 0) /* success */
6ff73fd2
SO		 2294 return;
2295
9815c7cf 2296 nfc_err(dev->dev,
073a625f 2297 "Error %d when trying to perform data_exchange\n", rc);
6ff73fd2 2298
b1e666f5 2299 dev_kfree_skb(skb);
140ef7f6 2300 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2301
b1e666f5 2302error:
9815c7cf 2303 dev->phy_ops->send_ack(dev, GFP_KERNEL);
5d50b364 2304 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2305}
2306
963a82e0
OG		 2307static void pn533_wq_mi_send(struct work_struct *work)
2308{
2309 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2310 struct sk_buff *skb;
2311 int rc;
2312
9815c7cf 2313 dev_dbg(dev->dev, "%s\n", __func__);
963a82e0
OG		 2314
2315 /* Grab the first skb in the queue */
2316 skb = skb_dequeue(&dev->fragment_skb);
2317
2318 if (skb == NULL) { /* No more data */
2319 /* Reset the queue for future use */
2320 skb_queue_head_init(&dev->fragment_skb);
2321 goto error;
2322 }
2323
2324 switch (dev->device_type) {
2325 case PN533_DEVICE_PASORI:
2326 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2327 rc = -EIO;
2328 break;
2329 }
2330
2331 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2332 skb,
2333 pn533_data_exchange_complete,
2334 dev->cmd_complete_dep_arg);
2335
2336 break;
2337
2338 default:
2339 /* Still some fragments? */
9815c7cf
MT		 2340 rc = pn533_send_cmd_direct_async(dev,
2341 PN533_CMD_IN_DATA_EXCHANGE,
963a82e0
OG		 2342 skb,
2343 pn533_data_exchange_complete,
2344 dev->cmd_complete_dep_arg);
2345
2346 break;
2347 }
2348
2349 if (rc == 0) /* success */
2350 return;
2351
9815c7cf 2352 nfc_err(dev->dev,
073a625f 2353 "Error %d when trying to perform data_exchange\n", rc);
963a82e0
OG		 2354
2355 dev_kfree_skb(skb);
2356 kfree(dev->cmd_complete_dep_arg);
2357
2358error:
9815c7cf 2359 dev->phy_ops->send_ack(dev, GFP_KERNEL);
963a82e0
OG		 2360 queue_work(dev->wq, &dev->cmd_work);
2361}
2362
c46ee386
AAJ		 2363static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2364 u8 cfgdata_len)
2365{
cb950d93
WR		 2366 struct sk_buff *skb;
2367 struct sk_buff *resp;
cb950d93 2368 int skb_len;
c46ee386 2369
9815c7cf 2370 dev_dbg(dev->dev, "%s\n", __func__);
c46ee386 2371
cb950d93 2372 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2373
9e2d493e 2374 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2375 if (!skb)
2376 return -ENOMEM;
c46ee386 2377
cb950d93
WR		 2378 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2379 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2380
cb950d93
WR		 2381 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2382 if (IS_ERR(resp))
2383 return PTR_ERR(resp);
c46ee386 2384
cb950d93
WR		 2385 dev_kfree_skb(resp);
2386 return 0;
2387}
2388
2389static int pn533_get_firmware_version(struct pn533 *dev,
2390 struct pn533_fw_version *fv)
2391{
2392 struct sk_buff *skb;
2393 struct sk_buff *resp;
2394
9e2d493e 2395 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2396 if (!skb)
2397 return -ENOMEM;
2398
2399 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2400 if (IS_ERR(resp))
2401 return PTR_ERR(resp);
2402
2403 fv->ic = resp->data[0];
2404 fv->ver = resp->data[1];
2405 fv->rev = resp->data[2];
2406 fv->support = resp->data[3];
2407
2408 dev_kfree_skb(resp);
2409 return 0;
c46ee386
AAJ		 2410}
2411
f75c2913 2412static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2413{
cb950d93
WR		 2414 struct sk_buff *skb;
2415 struct sk_buff *resp;
5c7b0531 2416
9815c7cf 2417 dev_dbg(dev->dev, "%s\n", __func__);
5c7b0531 2418
9e2d493e 2419 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2420 if (!skb)
2421 return -ENOMEM;
5c7b0531 2422
cb950d93 2423 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2424
cb950d93
WR		 2425 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2426 if (IS_ERR(resp))
2427 return PTR_ERR(resp);
5c7b0531 2428
cb950d93 2429 dev_kfree_skb(resp);
5c7b0531 2430
94c5c156 2431 return 0;
5c7b0531
SO		 2432}
2433
60d9edd5
SO		 2434static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2435{
2436 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2437 u8 rf_field = !!rf;
2438 int rc;
2439
3a8eab39
SO		 2440 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2441
60d9edd5
SO		 2442 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2443 (u8 *)&rf_field, 1);
2444 if (rc) {
9815c7cf 2445 nfc_err(dev->dev, "Error on setting RF field\n");
60d9edd5
SO		 2446 return rc;
2447 }
2448
2449 return rc;
2450}
2451
dd7bedcd
MT		 2452static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2453{
2454 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2455 struct sk_buff *skb;
2456 struct sk_buff *resp;
2457
2458 skb = pn533_alloc_skb(dev, 1);
2459 if (!skb)
2460 return -ENOMEM;
2461
2462 *skb_put(skb, 1) = 0x01;
2463
2464 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2465 if (IS_ERR(resp))
2466 return PTR_ERR(resp);
2467
2468 dev_kfree_skb(resp);
2469 return 0;
2470}
2471
e44666b9 2472static int pn533_dev_up(struct nfc_dev *nfc_dev)
60d9edd5 2473{
dd7bedcd
MT		 2474 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2475
2476 if (dev->device_type == PN533_DEVICE_PN532) {
2477 int rc = pn532_sam_configuration(nfc_dev);
2478
2479 if (rc)
2480 return rc;
2481 }
2482
60d9edd5
SO		 2483 return pn533_rf_field(nfc_dev, 1);
2484}
2485
e44666b9 2486static int pn533_dev_down(struct nfc_dev *nfc_dev)
60d9edd5
SO		 2487{
2488 return pn533_rf_field(nfc_dev, 0);
2489}
2490
5c7b0531 2491static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2492 .dev_up = pn533_dev_up,
2493 .dev_down = pn533_dev_down,
361f3cb7
SO		 2494 .dep_link_up = pn533_dep_link_up,
2495 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2496 .start_poll = pn533_start_poll,
2497 .stop_poll = pn533_stop_poll,
2498 .activate_target = pn533_activate_target,
2499 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2500 .im_transceive = pn533_transceive,
dadb06f2 2501 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2502};
2503
5c7b0531
SO		 2504static int pn533_setup(struct pn533 *dev)
2505{
2506 struct pn533_config_max_retries max_retries;
2507 struct pn533_config_timing timing;
2508 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2509 int rc;
2510
2511 switch (dev->device_type) {
2512 case PN533_DEVICE_STD:
5c7b0531 2513 case PN533_DEVICE_PASORI:
53cf4839 2514 case PN533_DEVICE_ACR122U:
dd7bedcd 2515 case PN533_DEVICE_PN532:
5c7b0531
SO		 2516 max_retries.mx_rty_atr = 0x2;
2517 max_retries.mx_rty_psl = 0x1;
2518 max_retries.mx_rty_passive_act =
2519 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2520
2521 timing.rfu = PN533_CONFIG_TIMING_102;
2522 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2523 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2524
2525 break;
2526
2527 default:
9815c7cf 2528 nfc_err(dev->dev, "Unknown device type %d\n",
073a625f 2529 dev->device_type);
5c7b0531
SO		 2530 return -EINVAL;
2531 }
2532
2533 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2534 (u8 *)&max_retries, sizeof(max_retries));
2535 if (rc) {
9815c7cf 2536 nfc_err(dev->dev,
073a625f 2537 "Error on setting MAX_RETRIES config\n");
5c7b0531
SO		 2538 return rc;
2539 }
2540
2541
2542 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2543 (u8 *)&timing, sizeof(timing));
2544 if (rc) {
9815c7cf 2545 nfc_err(dev->dev, "Error on setting RF timings\n");
5c7b0531
SO		 2546 return rc;
2547 }
2548
2549 switch (dev->device_type) {
2550 case PN533_DEVICE_STD:
dd7bedcd 2551 case PN533_DEVICE_PN532:
5c7b0531
SO		 2552 break;
2553
2554 case PN533_DEVICE_PASORI:
f75c2913 2555 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2556
2557 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2558 pasori_cfg, 3);
2559 if (rc) {
9815c7cf 2560 nfc_err(dev->dev,
073a625f 2561 "Error while settings PASORI config\n");
5c7b0531
SO		 2562 return rc;
2563 }
2564
f75c2913 2565 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2566
2567 break;
2568 }
2569
2570 return 0;
2571}
2572
32ecc75d
AR		 2573int pn533_finalize_setup(struct pn533 *dev)
2574{
2575
2576 struct pn533_fw_version fw_ver;
2577 int rc;
2578
2579 memset(&fw_ver, 0, sizeof(fw_ver));
2580
2581 rc = pn533_get_firmware_version(dev, &fw_ver);
2582 if (rc) {
2583 nfc_err(dev->dev, "Unable to get FW version\n");
2584 return rc;
2585 }
2586
2587 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2588 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2589
2590 rc = pn533_setup(dev);
2591 if (rc)
2592 return rc;
2593
2594 return 0;
2595}
2596EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2597
9815c7cf
MT		 2598struct pn533 *pn533_register_device(u32 device_type,
2599 u32 protocols,
2600 enum pn533_protocol_type protocol_type,
2601 void *phy,
2602 struct pn533_phy_ops *phy_ops,
2603 struct pn533_frame_ops *fops,
b16931b1
MT		 2604 struct device *dev,
2605 struct device *parent)
c46ee386 2606{
9815c7cf 2607 struct pn533 *priv;
c46ee386 2608 int rc = -ENOMEM;
c46ee386 2609
9815c7cf
MT		 2610 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2611 if (!priv)
2612 return ERR_PTR(-ENOMEM);
c46ee386 2613
9815c7cf
MT		 2614 priv->phy = phy;
2615 priv->phy_ops = phy_ops;
2616 priv->dev = dev;
2617 if (fops != NULL)
2618 priv->ops = fops;
2619 else
2620 priv->ops = &pn533_std_frame_ops;
2621
2622 priv->protocol_type = protocol_type;
2623 priv->device_type = device_type;
2624
2625 mutex_init(&priv->cmd_lock);
2626
2627 INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2628 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2629 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2630 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2631 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2632 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2633 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2634 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2635 INIT_WORK(&priv->rf_work, pn533_wq_rf);
2636 priv->wq = alloc_ordered_workqueue("pn533", 0);
2637 if (priv->wq == NULL)
4849f85e 2638 goto error;
c46ee386 2639
9815c7cf
MT		 2640 init_timer(&priv->listen_timer);
2641 priv->listen_timer.data = (unsigned long) priv;
2642 priv->listen_timer.function = pn533_listen_mode_timer;
5c7b0531 2643
9815c7cf
MT		 2644 skb_queue_head_init(&priv->resp_q);
2645 skb_queue_head_init(&priv->fragment_skb);
53cf4839 2646
9815c7cf 2647 INIT_LIST_HEAD(&priv->cmd_queue);
c46ee386 2648
9815c7cf
MT		 2649 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2650 priv->ops->tx_header_len +
e8753043 2651 PN533_CMD_DATAEXCH_HEAD_LEN,
9815c7cf
MT		 2652 priv->ops->tx_tail_len);
2653 if (!priv->nfc_dev) {
4674d0fe 2654 rc = -ENOMEM;
4849f85e 2655 goto destroy_wq;
4674d0fe 2656 }
c46ee386 2657
b16931b1 2658 nfc_set_parent_dev(priv->nfc_dev, parent);
9815c7cf 2659 nfc_set_drvdata(priv->nfc_dev, priv);
c46ee386 2660
9815c7cf 2661 rc = nfc_register_device(priv->nfc_dev);
c46ee386
AAJ		 2662 if (rc)
2663 goto free_nfc_dev;
2664
9815c7cf 2665 return priv;
c46ee386
AAJ		 2666
2667free_nfc_dev:
9815c7cf 2668 nfc_free_device(priv->nfc_dev);
9f2f8ba1 2669
4849f85e 2670destroy_wq:
9815c7cf 2671 destroy_workqueue(priv->wq);
c46ee386 2672error:
9815c7cf
MT		 2673 kfree(priv);
2674 return ERR_PTR(rc);
c46ee386 2675}
9815c7cf 2676EXPORT_SYMBOL_GPL(pn533_register_device);
c46ee386 2677
9815c7cf 2678void pn533_unregister_device(struct pn533 *priv)
c46ee386 2679{
5d50b364 2680 struct pn533_cmd *cmd, *n;
c46ee386 2681
9815c7cf
MT		 2682 nfc_unregister_device(priv->nfc_dev);
2683 nfc_free_device(priv->nfc_dev);
c46ee386 2684
9815c7cf
MT		 2685 flush_delayed_work(&priv->poll_work);
2686 destroy_workqueue(priv->wq);
c46ee386 2687
9815c7cf 2688 skb_queue_purge(&priv->resp_q);
c46ee386 2689
9815c7cf 2690 del_timer(&priv->listen_timer);
c46ee386 2691
9815c7cf 2692 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
5d50b364
SO		 2693 list_del(&cmd->queue);
2694 kfree(cmd);
2695 }
2696
9815c7cf 2697 kfree(priv);
c46ee386 2698}
9815c7cf 2699EXPORT_SYMBOL_GPL(pn533_unregister_device);
c46ee386 2700
c46ee386 2701
e70b96e9
WR		 2702MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2703MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2704MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
9815c7cf 2705MODULE_DESCRIPTION("PN533 driver ver " VERSION);
c46ee386
AAJ		 2706MODULE_VERSION(VERSION);
2707MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror