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NFC: pn533: Fix minor style issues
[mirror_ubuntu-zesty-kernel.git] / drivers / nfc / pn533.c
CommitLineData
c46ee386
AAJ		 1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24#include <linux/device.h>
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/slab.h>
28#include <linux/usb.h>
29#include <linux/nfc.h>
30#include <linux/netdevice.h>
55eb94f9 31#include <net/nfc/nfc.h>
c46ee386
AAJ		 32
33#define VERSION "0.1"
34
35#define PN533_VENDOR_ID 0x4CC
36#define PN533_PRODUCT_ID 0x2533
37
38#define SCM_VENDOR_ID 0x4E6
39#define SCL3711_PRODUCT_ID 0x5591
40
5c7b0531
SO		 41#define SONY_VENDOR_ID 0x054c
42#define PASORI_PRODUCT_ID 0x02e1
43
5c7b0531
SO		 44#define PN533_DEVICE_STD 0x1
45#define PN533_DEVICE_PASORI 0x2
46
01d719a2
SO		 47#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
48 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
49 NFC_PROTO_NFC_DEP_MASK |\
50 NFC_PROTO_ISO14443_B_MASK)
5c7b0531
SO		 51
52#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
53 NFC_PROTO_MIFARE_MASK | \
54 NFC_PROTO_FELICA_MASK | \
01d719a2 55 NFC_PROTO_ISO14443_MASK | \
5c7b0531
SO		 56 NFC_PROTO_NFC_DEP_MASK)
57
c46ee386 58static const struct usb_device_id pn533_table[] = {
5c7b0531
SO		 59 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
60 .idVendor = PN533_VENDOR_ID,
61 .idProduct = PN533_PRODUCT_ID,
62 .driver_info = PN533_DEVICE_STD,
63 },
64 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
65 .idVendor = SCM_VENDOR_ID,
66 .idProduct = SCL3711_PRODUCT_ID,
67 .driver_info = PN533_DEVICE_STD,
68 },
69 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
70 .idVendor = SONY_VENDOR_ID,
71 .idProduct = PASORI_PRODUCT_ID,
72 .driver_info = PN533_DEVICE_PASORI,
73 },
c46ee386
AAJ		 74 { }
75};
76MODULE_DEVICE_TABLE(usb, pn533_table);
77
6fbbdc16
SO		 78/* How much time we spend listening for initiators */
79#define PN533_LISTEN_TIME 2
80
c46ee386 81/* frame definitions */
82dec34d
WR		 82#define PN533_NORMAL_FRAME_MAX_LEN 262 /* 6 (PREAMBLE, SOF, LEN, LCS, TFI)
83 254 (DATA)
84 2 (DCS, postamble) */
b1bb290a
WR		 85#define PN533_FRAME_HEADER_LEN (sizeof(struct pn533_frame) \
86 + 2) /* data[0] TFI, data[1] CC */
87#define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82dec34d 88
15461aeb
WR		 89/*
90 * Max extended frame payload len, excluding TFI and CC
91 * which are already in PN533_FRAME_HEADER_LEN.
92 */
93#define PN533_FRAME_MAX_PAYLOAD_LEN 263
94
c46ee386 95#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
b1bb290a 96 PN533_FRAME_TAIL_LEN)
c46ee386
AAJ		 97#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
98#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
99#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
100
101/* start of frame */
102#define PN533_SOF 0x00FF
103
104/* frame identifier: in/out/error */
105#define PN533_FRAME_IDENTIFIER(f) (f->data[0])
106#define PN533_DIR_OUT 0xD4
107#define PN533_DIR_IN 0xD5
108
109/* PN533 Commands */
110#define PN533_FRAME_CMD(f) (f->data[1])
111#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
112#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
113
114#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
115#define PN533_CMD_RF_CONFIGURATION 0x32
116#define PN533_CMD_IN_DATA_EXCHANGE 0x40
5c7b0531 117#define PN533_CMD_IN_COMM_THRU 0x42
c46ee386
AAJ		 118#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
119#define PN533_CMD_IN_ATR 0x50
120#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 121#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 122
ad3823ce 123#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 124#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 125#define PN533_CMD_TG_SET_DATA 0x8e
aada17ac 126#define PN533_CMD_UNDEF 0xff
ad3823ce 127
c46ee386
AAJ		 128#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
129
130/* PN533 Return codes */
131#define PN533_CMD_RET_MASK 0x3F
132#define PN533_CMD_MI_MASK 0x40
133#define PN533_CMD_RET_SUCCESS 0x00
134
135struct pn533;
136
137typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
138 u8 *params, int params_len);
139
aada17ac
WR		 140typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
141 struct sk_buff *resp);
142
c46ee386
AAJ		 143/* structs for pn533 commands */
144
145/* PN533_CMD_GET_FIRMWARE_VERSION */
146struct pn533_fw_version {
147 u8 ic;
148 u8 ver;
149 u8 rev;
150 u8 support;
151};
152
153/* PN533_CMD_RF_CONFIGURATION */
34a85bfc 154#define PN533_CFGITEM_TIMING 0x02
c46ee386 155#define PN533_CFGITEM_MAX_RETRIES 0x05
5c7b0531 156#define PN533_CFGITEM_PASORI 0x82
c46ee386 157
34a85bfc
SO		 158#define PN533_CONFIG_TIMING_102 0xb
159#define PN533_CONFIG_TIMING_204 0xc
160#define PN533_CONFIG_TIMING_409 0xd
161#define PN533_CONFIG_TIMING_819 0xe
162
c46ee386
AAJ		 163#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
164#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
165
166struct pn533_config_max_retries {
167 u8 mx_rty_atr;
168 u8 mx_rty_psl;
169 u8 mx_rty_passive_act;
170} __packed;
171
34a85bfc
SO		 172struct pn533_config_timing {
173 u8 rfu;
174 u8 atr_res_timeout;
175 u8 dep_timeout;
176} __packed;
177
c46ee386
AAJ		 178/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
179
180/* felica commands opcode */
181#define PN533_FELICA_OPC_SENSF_REQ 0
182#define PN533_FELICA_OPC_SENSF_RES 1
183/* felica SENSF_REQ parameters */
184#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
185#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
186#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
187#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
188
189/* type B initiator_data values */
190#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
191#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
192#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
193
194union pn533_cmd_poll_initdata {
195 struct {
196 u8 afi;
197 u8 polling_method;
198 } __packed type_b;
199 struct {
200 u8 opcode;
201 __be16 sc;
202 u8 rc;
203 u8 tsn;
204 } __packed felica;
205};
206
207/* Poll modulations */
208enum {
209 PN533_POLL_MOD_106KBPS_A,
210 PN533_POLL_MOD_212KBPS_FELICA,
211 PN533_POLL_MOD_424KBPS_FELICA,
212 PN533_POLL_MOD_106KBPS_JEWEL,
213 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 214 PN533_LISTEN_MOD,
c46ee386
AAJ		 215
216 __PN533_POLL_MOD_AFTER_LAST,
217};
218#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
219
220struct pn533_poll_modulations {
221 struct {
222 u8 maxtg;
223 u8 brty;
224 union pn533_cmd_poll_initdata initiator_data;
225 } __packed data;
226 u8 len;
227};
228
229const struct pn533_poll_modulations poll_mod[] = {
230 [PN533_POLL_MOD_106KBPS_A] = {
231 .data = {
232 .maxtg = 1,
233 .brty = 0,
234 },
235 .len = 2,
236 },
237 [PN533_POLL_MOD_212KBPS_FELICA] = {
238 .data = {
239 .maxtg = 1,
240 .brty = 1,
241 .initiator_data.felica = {
242 .opcode = PN533_FELICA_OPC_SENSF_REQ,
243 .sc = PN533_FELICA_SENSF_SC_ALL,
244 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
245 .tsn = 0,
246 },
247 },
248 .len = 7,
249 },
250 [PN533_POLL_MOD_424KBPS_FELICA] = {
251 .data = {
252 .maxtg = 1,
253 .brty = 2,
254 .initiator_data.felica = {
255 .opcode = PN533_FELICA_OPC_SENSF_REQ,
256 .sc = PN533_FELICA_SENSF_SC_ALL,
257 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
258 .tsn = 0,
259 },
260 },
261 .len = 7,
262 },
263 [PN533_POLL_MOD_106KBPS_JEWEL] = {
264 .data = {
265 .maxtg = 1,
266 .brty = 4,
267 },
268 .len = 2,
269 },
270 [PN533_POLL_MOD_847KBPS_B] = {
271 .data = {
272 .maxtg = 1,
273 .brty = 8,
274 .initiator_data.type_b = {
275 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
276 .polling_method =
277 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
278 },
279 },
280 .len = 3,
281 },
6fbbdc16
SO		 282 [PN533_LISTEN_MOD] = {
283 .len = 0,
284 },
c46ee386
AAJ		 285};
286
287/* PN533_CMD_IN_ATR */
288
c46ee386
AAJ		 289struct pn533_cmd_activate_response {
290 u8 status;
291 u8 nfcid3t[10];
292 u8 didt;
293 u8 bst;
294 u8 brt;
295 u8 to;
296 u8 ppt;
297 /* optional */
298 u8 gt[];
299} __packed;
300
361f3cb7
SO		 301struct pn533_cmd_jump_dep_response {
302 u8 status;
303 u8 tg;
304 u8 nfcid3t[10];
305 u8 didt;
306 u8 bst;
307 u8 brt;
308 u8 to;
309 u8 ppt;
310 /* optional */
311 u8 gt[];
312} __packed;
c46ee386 313
ad3823ce
SO		 314
315/* PN533_TG_INIT_AS_TARGET */
316#define PN533_INIT_TARGET_PASSIVE 0x1
317#define PN533_INIT_TARGET_DEP 0x2
318
fc40a8c1
SO		 319#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
320#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
321#define PN533_INIT_TARGET_RESP_DEP 0x4
322
c46ee386
AAJ		 323struct pn533 {
324 struct usb_device *udev;
325 struct usb_interface *interface;
326 struct nfc_dev *nfc_dev;
327
328 struct urb *out_urb;
c46ee386
AAJ		 329 struct pn533_frame *out_frame;
330
331 struct urb *in_urb;
c46ee386
AAJ		 332 struct pn533_frame *in_frame;
333
6ff73fd2
SO		 334 struct sk_buff_head resp_q;
335
4849f85e
SO		 336 struct workqueue_struct *wq;
337 struct work_struct cmd_work;
5d50b364 338 struct work_struct cmd_complete_work;
6fbbdc16 339 struct work_struct poll_work;
6ff73fd2 340 struct work_struct mi_work;
103b34cf 341 struct work_struct tg_work;
6fbbdc16 342 struct timer_list listen_timer;
4849f85e
SO		 343 struct pn533_frame *wq_in_frame;
344 int wq_in_error;
6fbbdc16 345 int cancel_listen;
c46ee386
AAJ		 346
347 pn533_cmd_complete_t cmd_complete;
348 void *cmd_complete_arg;
b1e666f5 349 void *cmd_complete_mi_arg;
0201ed03 350 struct mutex cmd_lock;
c46ee386
AAJ		 351 u8 cmd;
352
353 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
354 u8 poll_mod_count;
355 u8 poll_mod_curr;
356 u32 poll_protocols;
6fbbdc16
SO		 357 u32 listen_protocols;
358
359 u8 *gb;
360 size_t gb_len;
c46ee386
AAJ		 361
362 u8 tgt_available_prots;
363 u8 tgt_active_prot;
51ad304c 364 u8 tgt_mode;
5c7b0531
SO		 365
366 u32 device_type;
5d50b364
SO		 367
368 struct list_head cmd_queue;
369 u8 cmd_pending;
370};
371
372struct pn533_cmd {
373 struct list_head queue;
374 struct pn533_frame *out_frame;
375 struct pn533_frame *in_frame;
376 int in_frame_len;
aada17ac
WR		 377 u8 cmd_code;
378 struct sk_buff *req;
379 struct sk_buff *resp;
5d50b364
SO		 380 pn533_cmd_complete_t cmd_complete;
381 void *arg;
c46ee386
AAJ		 382};
383
384struct pn533_frame {
385 u8 preamble;
386 __be16 start_frame;
387 u8 datalen;
388 u8 datalen_checksum;
389 u8 data[];
390} __packed;
391
392/* The rule: value + checksum = 0 */
393static inline u8 pn533_checksum(u8 value)
394{
395 return ~value + 1;
396}
397
398/* The rule: sum(data elements) + checksum = 0 */
399static u8 pn533_data_checksum(u8 *data, int datalen)
400{
401 u8 sum = 0;
402 int i;
403
404 for (i = 0; i < datalen; i++)
405 sum += data[i];
406
407 return pn533_checksum(sum);
408}
409
410/**
411 * pn533_tx_frame_ack - create a ack frame
412 * @frame: The frame to be set as ack
413 *
414 * Ack is different type of standard frame. As a standard frame, it has
415 * preamble and start_frame. However the checksum of this frame must fail,
416 * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
417 * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
418 * After datalen_checksum field, the postamble is placed.
419 */
420static void pn533_tx_frame_ack(struct pn533_frame *frame)
421{
422 frame->preamble = 0;
423 frame->start_frame = cpu_to_be16(PN533_SOF);
424 frame->datalen = 0;
425 frame->datalen_checksum = 0xFF;
426 /* data[0] is used as postamble */
427 frame->data[0] = 0;
428}
429
430static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
431{
432 frame->preamble = 0;
433 frame->start_frame = cpu_to_be16(PN533_SOF);
434 PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
435 PN533_FRAME_CMD(frame) = cmd;
436 frame->datalen = 2;
437}
438
439static void pn533_tx_frame_finish(struct pn533_frame *frame)
440{
441 frame->datalen_checksum = pn533_checksum(frame->datalen);
442
443 PN533_FRAME_CHECKSUM(frame) =
444 pn533_data_checksum(frame->data, frame->datalen);
445
446 PN533_FRAME_POSTAMBLE(frame) = 0;
447}
448
449static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
450{
451 u8 checksum;
452
453 if (frame->start_frame != cpu_to_be16(PN533_SOF))
454 return false;
455
456 checksum = pn533_checksum(frame->datalen);
457 if (checksum != frame->datalen_checksum)
458 return false;
459
460 checksum = pn533_data_checksum(frame->data, frame->datalen);
461 if (checksum != PN533_FRAME_CHECKSUM(frame))
462 return false;
463
464 return true;
465}
466
467static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
468{
469 if (frame->start_frame != cpu_to_be16(PN533_SOF))
470 return false;
471
472 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
473 return false;
474
475 return true;
476}
477
478static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
479{
480 return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
481}
482
4849f85e
SO		 483
484static void pn533_wq_cmd_complete(struct work_struct *work)
c46ee386 485{
5d50b364 486 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
4849f85e 487 struct pn533_frame *in_frame;
c46ee386
AAJ		 488 int rc;
489
4849f85e
SO		 490 in_frame = dev->wq_in_frame;
491
492 if (dev->wq_in_error)
c46ee386 493 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
4849f85e 494 dev->wq_in_error);
c46ee386
AAJ		 495 else
496 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
497 PN533_FRAME_CMD_PARAMS_PTR(in_frame),
498 PN533_FRAME_CMD_PARAMS_LEN(in_frame));
499
500 if (rc != -EINPROGRESS)
5d50b364 501 queue_work(dev->wq, &dev->cmd_work);
c46ee386
AAJ		 502}
503
504static void pn533_recv_response(struct urb *urb)
505{
506 struct pn533 *dev = urb->context;
507 struct pn533_frame *in_frame;
508
4849f85e 509 dev->wq_in_frame = NULL;
c46ee386
AAJ		 510
511 switch (urb->status) {
512 case 0:
513 /* success */
514 break;
515 case -ECONNRESET:
516 case -ENOENT:
517 case -ESHUTDOWN:
6ca55372
WR		 518 nfc_dev_dbg(&dev->interface->dev,
519 "Urb shutting down with status: %d", urb->status);
4849f85e
SO		 520 dev->wq_in_error = urb->status;
521 goto sched_wq;
c46ee386 522 default:
6ca55372
WR		 523 nfc_dev_err(&dev->interface->dev,
524 "Nonzero urb status received: %d", urb->status);
4849f85e
SO		 525 dev->wq_in_error = urb->status;
526 goto sched_wq;
c46ee386
AAJ		 527 }
528
529 in_frame = dev->in_urb->transfer_buffer;
530
99e591be
WR		 531 print_hex_dump(KERN_DEBUG, "PN533 RX: ", DUMP_PREFIX_NONE, 16, 1,
532 in_frame, PN533_FRAME_SIZE(in_frame), false);
533
c46ee386
AAJ		 534 if (!pn533_rx_frame_is_valid(in_frame)) {
535 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
4849f85e
SO		 536 dev->wq_in_error = -EIO;
537 goto sched_wq;
c46ee386
AAJ		 538 }
539
540 if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
6ca55372
WR		 541 nfc_dev_err(&dev->interface->dev,
542 "It it not the response to the last command");
4849f85e
SO		 543 dev->wq_in_error = -EIO;
544 goto sched_wq;
c46ee386
AAJ		 545 }
546
547 nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
4849f85e
SO		 548 dev->wq_in_error = 0;
549 dev->wq_in_frame = in_frame;
c46ee386 550
4849f85e 551sched_wq:
5d50b364 552 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 553}
554
555static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
556{
557 dev->in_urb->complete = pn533_recv_response;
558
559 return usb_submit_urb(dev->in_urb, flags);
560}
561
562static void pn533_recv_ack(struct urb *urb)
563{
564 struct pn533 *dev = urb->context;
565 struct pn533_frame *in_frame;
566 int rc;
567
568 switch (urb->status) {
569 case 0:
570 /* success */
571 break;
572 case -ECONNRESET:
573 case -ENOENT:
574 case -ESHUTDOWN:
6ca55372
WR		 575 nfc_dev_dbg(&dev->interface->dev,
576 "Urb shutting down with status: %d", urb->status);
4849f85e
SO		 577 dev->wq_in_error = urb->status;
578 goto sched_wq;
c46ee386 579 default:
6ca55372
WR		 580 nfc_dev_err(&dev->interface->dev,
581 "Nonzero urb status received: %d", urb->status);
4849f85e
SO		 582 dev->wq_in_error = urb->status;
583 goto sched_wq;
c46ee386
AAJ		 584 }
585
586 in_frame = dev->in_urb->transfer_buffer;
587
588 if (!pn533_rx_frame_is_ack(in_frame)) {
589 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
4849f85e
SO		 590 dev->wq_in_error = -EIO;
591 goto sched_wq;
c46ee386
AAJ		 592 }
593
594 nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
595
596 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
597 if (rc) {
6ca55372
WR		 598 nfc_dev_err(&dev->interface->dev,
599 "usb_submit_urb failed with result %d", rc);
4849f85e
SO		 600 dev->wq_in_error = rc;
601 goto sched_wq;
c46ee386
AAJ		 602 }
603
604 return;
605
4849f85e
SO		 606sched_wq:
607 dev->wq_in_frame = NULL;
5d50b364 608 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 609}
610
611static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
612{
613 dev->in_urb->complete = pn533_recv_ack;
614
615 return usb_submit_urb(dev->in_urb, flags);
616}
617
618static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
619{
620 int rc;
621
622 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
623
624 pn533_tx_frame_ack(dev->out_frame);
625
626 dev->out_urb->transfer_buffer = dev->out_frame;
627 dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
628 rc = usb_submit_urb(dev->out_urb, flags);
629
630 return rc;
631}
632
633static int __pn533_send_cmd_frame_async(struct pn533 *dev,
634 struct pn533_frame *out_frame,
635 struct pn533_frame *in_frame,
636 int in_frame_len,
637 pn533_cmd_complete_t cmd_complete,
d94ea4f5 638 void *arg)
c46ee386
AAJ		 639{
640 int rc;
641
642 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
5d467742 643 PN533_FRAME_CMD(out_frame));
c46ee386
AAJ		 644
645 dev->cmd = PN533_FRAME_CMD(out_frame);
646 dev->cmd_complete = cmd_complete;
647 dev->cmd_complete_arg = arg;
648
649 dev->out_urb->transfer_buffer = out_frame;
650 dev->out_urb->transfer_buffer_length =
651 PN533_FRAME_SIZE(out_frame);
652
653 dev->in_urb->transfer_buffer = in_frame;
654 dev->in_urb->transfer_buffer_length = in_frame_len;
655
99e591be
WR		 656 print_hex_dump(KERN_DEBUG, "PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
657 out_frame, PN533_FRAME_SIZE(out_frame), false);
658
d94ea4f5 659 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 660 if (rc)
661 return rc;
662
d94ea4f5 663 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
c46ee386
AAJ		 664 if (rc)
665 goto error;
666
667 return 0;
668
669error:
670 usb_unlink_urb(dev->out_urb);
671 return rc;
672}
673
aada17ac
WR		 674static void pn533_build_cmd_frame(u8 cmd_code, struct sk_buff *skb)
675{
676 struct pn533_frame *frame;
677 /* payload is already there, just update datalen */
678 int payload_len = skb->len;
679
680 skb_push(skb, PN533_FRAME_HEADER_LEN);
681 skb_put(skb, PN533_FRAME_TAIL_LEN);
682
683 frame = (struct pn533_frame *)skb->data;
684
685 pn533_tx_frame_init(frame, cmd_code);
686 frame->datalen += payload_len;
687 pn533_tx_frame_finish(frame);
688}
689
690struct pn533_send_async_complete_arg {
691 pn533_send_async_complete_t complete_cb;
692 void *complete_cb_context;
693 struct sk_buff *resp;
694 struct sk_buff *req;
695};
696
697static int pn533_send_async_complete(struct pn533 *dev, void *_arg, u8 *params,
698 int params_len)
699{
700 struct pn533_send_async_complete_arg *arg = _arg;
701
702 struct sk_buff *req = arg->req;
703 struct sk_buff *resp = arg->resp;
704
705 struct pn533_frame *frame = (struct pn533_frame *)resp->data;
706 int rc;
707
708 dev_kfree_skb(req);
709
710 if (params_len < 0) {
711 nfc_dev_err(&dev->interface->dev,
712 "Error %d when starting as a target",
713 params_len);
714
715 arg->complete_cb(dev, arg->complete_cb_context,
716 ERR_PTR(params_len));
717 rc = params_len;
718 dev_kfree_skb(resp);
719 goto out;
720 }
721
722 skb_put(resp, PN533_FRAME_SIZE(frame));
723 skb_pull(resp, PN533_FRAME_HEADER_LEN);
724 skb_trim(resp, resp->len - PN533_FRAME_TAIL_LEN);
725
726 rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
727
728out:
729 kfree(arg);
730 return rc;
731}
732
733static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
734 struct sk_buff *req, struct sk_buff *resp,
735 int resp_len,
736 pn533_send_async_complete_t complete_cb,
737 void *complete_cb_context)
738{
739 struct pn533_cmd *cmd;
740 struct pn533_send_async_complete_arg *arg;
741 int rc = 0;
742
743 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
744
745 arg = kzalloc(sizeof(arg), GFP_KERNEL);
746 if (!arg)
747 return -ENOMEM;
748
749 arg->complete_cb = complete_cb;
750 arg->complete_cb_context = complete_cb_context;
751 arg->resp = resp;
752 arg->req = req;
753
754 pn533_build_cmd_frame(cmd_code, req);
755
756 mutex_lock(&dev->cmd_lock);
757
758 if (!dev->cmd_pending) {
759 rc = __pn533_send_cmd_frame_async(dev,
760 (struct pn533_frame *)req->data,
761 (struct pn533_frame *)resp->data,
762 resp_len, pn533_send_async_complete,
763 arg);
764 if (rc)
765 goto error;
766
767 dev->cmd_pending = 1;
768 goto unlock;
769 }
770
771 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
772
773 cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
774 if (!cmd) {
775 rc = -ENOMEM;
776 goto error;
777 }
778
779 INIT_LIST_HEAD(&cmd->queue);
780 cmd->cmd_code = cmd_code;
781 cmd->req = req;
782 cmd->resp = resp;
783 cmd->arg = arg;
784
785 list_add_tail(&cmd->queue, &dev->cmd_queue);
786
787 goto unlock;
788
789error:
790 kfree(arg);
791unlock:
792 mutex_unlock(&dev->cmd_lock);
793 return rc;
15461aeb
WR		 794}
795
796static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
797 struct sk_buff *req,
798 pn533_send_async_complete_t complete_cb,
799 void *complete_cb_context)
800{
801 struct sk_buff *resp;
802 int rc;
803 int resp_len = PN533_FRAME_HEADER_LEN +
804 PN533_FRAME_MAX_PAYLOAD_LEN +
805 PN533_FRAME_TAIL_LEN;
806
807 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
808
809 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
810 if (!resp)
811 return -ENOMEM;
812
813 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
814 complete_cb_context);
815 if (rc)
816 dev_kfree_skb(resp);
817
818 return rc;
aada17ac
WR		 819}
820
821static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
822 struct sk_buff *req,
823 pn533_send_async_complete_t complete_cb,
824 void *complete_cb_context)
825{
826 struct sk_buff *resp;
827 int rc;
828
829 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
830
831 resp = alloc_skb(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
832 if (!resp)
833 return -ENOMEM;
834
835 rc = __pn533_send_async(dev, cmd_code, req, resp,
836 PN533_NORMAL_FRAME_MAX_LEN,
837 complete_cb, complete_cb_context);
838 if (rc)
839 dev_kfree_skb(resp);
840
841 return rc;
842}
843
b1e666f5
WR		 844/*
845 * pn533_send_cmd_direct_async
846 *
847 * The function sends a piority cmd directly to the chip omiting the cmd
848 * queue. It's intended to be used by chaining mechanism of received responses
849 * where the host has to request every single chunk of data before scheduling
850 * next cmd from the queue.
851 */
852static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
853 struct sk_buff *req,
854 pn533_send_async_complete_t complete_cb,
855 void *complete_cb_context)
856{
857 struct pn533_send_async_complete_arg *arg;
858 struct sk_buff *resp;
859 int rc;
860 int resp_len = PN533_FRAME_HEADER_LEN +
861 PN533_FRAME_MAX_PAYLOAD_LEN +
862 PN533_FRAME_TAIL_LEN;
863
864 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
865
866 resp = alloc_skb(resp_len, GFP_KERNEL);
867 if (!resp)
868 return -ENOMEM;
869
870 arg = kzalloc(sizeof(arg), GFP_KERNEL);
871 if (!arg) {
872 dev_kfree_skb(resp);
873 return -ENOMEM;
874 }
875
876 arg->complete_cb = complete_cb;
877 arg->complete_cb_context = complete_cb_context;
878 arg->resp = resp;
879 arg->req = req;
880
881 pn533_build_cmd_frame(cmd_code, req);
882
883 rc = __pn533_send_cmd_frame_async(dev, (struct pn533_frame *)req->data,
884 (struct pn533_frame *)resp->data,
885 resp_len, pn533_send_async_complete,
886 arg);
887 if (rc < 0) {
888 dev_kfree_skb(resp);
889 kfree(arg);
890 }
891
892 return rc;
893}
894
5d50b364
SO		 895static void pn533_wq_cmd(struct work_struct *work)
896{
897 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
898 struct pn533_cmd *cmd;
899
900 mutex_lock(&dev->cmd_lock);
901
902 if (list_empty(&dev->cmd_queue)) {
903 dev->cmd_pending = 0;
904 mutex_unlock(&dev->cmd_lock);
905 return;
906 }
907
908 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
909
60ad07ab
SJ		 910 list_del(&cmd->queue);
911
5d50b364
SO		 912 mutex_unlock(&dev->cmd_lock);
913
aada17ac
WR		 914 if (cmd->cmd_code != PN533_CMD_UNDEF)
915 __pn533_send_cmd_frame_async(dev,
916 (struct pn533_frame *)cmd->req->data,
917 (struct pn533_frame *)cmd->resp->data,
918 PN533_NORMAL_FRAME_MAX_LEN,
919 pn533_send_async_complete,
920 cmd->arg);
921 else
922 __pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
923 cmd->in_frame_len,
924 cmd->cmd_complete, cmd->arg);
5d50b364 925
5d50b364
SO		 926 kfree(cmd);
927}
928
c46ee386
AAJ		 929static int pn533_send_cmd_frame_async(struct pn533 *dev,
930 struct pn533_frame *out_frame,
931 struct pn533_frame *in_frame,
932 int in_frame_len,
933 pn533_cmd_complete_t cmd_complete,
d94ea4f5 934 void *arg)
c46ee386 935{
5d50b364 936 struct pn533_cmd *cmd;
ee5e8d81 937 int rc = 0;
c46ee386
AAJ		 938
939 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
940
5d50b364 941 mutex_lock(&dev->cmd_lock);
c46ee386 942
5d50b364
SO		 943 if (!dev->cmd_pending) {
944 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
945 in_frame_len, cmd_complete,
d94ea4f5 946 arg);
5d50b364
SO		 947 if (!rc)
948 dev->cmd_pending = 1;
949
ee5e8d81 950 goto unlock;
5d50b364
SO		 951 }
952
953 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
954
d94ea4f5 955 cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
ee5e8d81
SJ		 956 if (!cmd) {
957 rc = -ENOMEM;
958 goto unlock;
959 }
5d50b364
SO		 960
961 INIT_LIST_HEAD(&cmd->queue);
962 cmd->out_frame = out_frame;
963 cmd->in_frame = in_frame;
964 cmd->in_frame_len = in_frame_len;
aada17ac 965 cmd->cmd_code = PN533_CMD_UNDEF;
5d50b364
SO		 966 cmd->cmd_complete = cmd_complete;
967 cmd->arg = arg;
5d50b364
SO		 968
969 list_add_tail(&cmd->queue, &dev->cmd_queue);
c46ee386 970
ee5e8d81 971unlock:
0201ed03 972 mutex_unlock(&dev->cmd_lock);
5d50b364 973
ee5e8d81 974 return rc;
c46ee386
AAJ		 975}
976
977struct pn533_sync_cmd_response {
94c5c156 978 struct sk_buff *resp;
c46ee386
AAJ		 979 struct completion done;
980};
981
94c5c156
WR		 982static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
983 struct sk_buff *resp)
984{
985 struct pn533_sync_cmd_response *arg = _arg;
986
987 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
988
989 arg->resp = resp;
990 complete(&arg->done);
991
992 return 0;
993}
994
995/* pn533_send_cmd_sync
996 *
997 * Please note the req parameter is freed inside the function to
998 * limit a number of return value interpretations by the caller.
999 *
1000 * 1. negative in case of error during TX path -> req should be freed
1001 *
1002 * 2. negative in case of error during RX path -> req should not be freed
1003 * as it's been already freed at the begining of RX path by
1004 * async_complete_cb.
1005 *
1006 * 3. valid pointer in case of succesfult RX path
1007 *
1008 * A caller has to check a return value with IS_ERR macro. If the test pass,
1009 * the returned pointer is valid.
1010 *
1011 * */
1012static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1013 struct sk_buff *req)
1014{
1015 int rc;
1016 struct pn533_sync_cmd_response arg;
1017
1018 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1019
1020 init_completion(&arg.done);
1021
1022 rc = pn533_send_cmd_async(dev, cmd_code, req,
1023 pn533_send_sync_complete, &arg);
1024 if (rc) {
1025 dev_kfree_skb(req);
1026 return ERR_PTR(rc);
1027 }
1028
1029 wait_for_completion(&arg.done);
1030
1031 return arg.resp;
1032}
1033
c46ee386
AAJ		 1034static void pn533_send_complete(struct urb *urb)
1035{
1036 struct pn533 *dev = urb->context;
1037
1038 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1039
1040 switch (urb->status) {
1041 case 0:
1042 /* success */
1043 break;
1044 case -ECONNRESET:
1045 case -ENOENT:
1046 case -ESHUTDOWN:
6ca55372
WR		 1047 nfc_dev_dbg(&dev->interface->dev,
1048 "Urb shutting down with status: %d", urb->status);
c46ee386
AAJ		 1049 break;
1050 default:
6ca55372
WR		 1051 nfc_dev_dbg(&dev->interface->dev,
1052 "Nonzero urb status received: %d", urb->status);
c46ee386
AAJ		 1053 }
1054}
1055
d22b2db6
WR		 1056static struct sk_buff *pn533_alloc_skb(unsigned int size)
1057{
1058 struct sk_buff *skb;
1059
1060 skb = alloc_skb(PN533_FRAME_HEADER_LEN +
1061 size +
1062 PN533_FRAME_TAIL_LEN, GFP_KERNEL);
1063
1064 if (skb)
1065 skb_reserve(skb, PN533_FRAME_HEADER_LEN);
1066
1067 return skb;
1068}
1069
c46ee386
AAJ		 1070struct pn533_target_type_a {
1071 __be16 sens_res;
1072 u8 sel_res;
1073 u8 nfcid_len;
1074 u8 nfcid_data[];
1075} __packed;
1076
1077
1078#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1079#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1080#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1081
1082#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1083#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1084
1085#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1086#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1087
1088#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1089#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1090#define PN533_TYPE_A_SEL_PROT_DEP 2
1091#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1092
1093static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1094 int target_data_len)
1095{
1096 u8 ssd;
1097 u8 platconf;
1098
1099 if (target_data_len < sizeof(struct pn533_target_type_a))
1100 return false;
1101
1102 /* The lenght check of nfcid[] and ats[] are not being performed because
1103 the values are not being used */
1104
1105 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1106 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1107 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1108
1109 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1110 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1111 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1112 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1113 return false;
1114
1115 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1116 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1117 return false;
1118
1119 return true;
1120}
1121
1122static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1123 int tgt_data_len)
1124{
1125 struct pn533_target_type_a *tgt_type_a;
1126
37cf4fc6 1127 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1128
1129 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1130 return -EPROTO;
1131
1132 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1133 case PN533_TYPE_A_SEL_PROT_MIFARE:
1134 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1135 break;
1136 case PN533_TYPE_A_SEL_PROT_ISO14443:
1137 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1138 break;
1139 case PN533_TYPE_A_SEL_PROT_DEP:
1140 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1141 break;
1142 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1143 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1144 NFC_PROTO_NFC_DEP_MASK;
1145 break;
1146 }
1147
1148 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1149 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1150 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1151 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1152
1153 return 0;
1154}
1155
1156struct pn533_target_felica {
1157 u8 pol_res;
1158 u8 opcode;
1159 u8 nfcid2[8];
1160 u8 pad[8];
1161 /* optional */
1162 u8 syst_code[];
1163} __packed;
1164
1165#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1166#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1167
1168static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1169 int target_data_len)
1170{
1171 if (target_data_len < sizeof(struct pn533_target_felica))
1172 return false;
1173
1174 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1175 return false;
1176
1177 return true;
1178}
1179
1180static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1181 int tgt_data_len)
1182{
1183 struct pn533_target_felica *tgt_felica;
1184
37cf4fc6 1185 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1186
1187 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1188 return -EPROTO;
1189
5d467742
WR		 1190 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1191 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1192 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1193 else
1194 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1195
7975754f
SO		 1196 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1197 nfc_tgt->sensf_res_len = 9;
1198
c46ee386
AAJ		 1199 return 0;
1200}
1201
1202struct pn533_target_jewel {
1203 __be16 sens_res;
1204 u8 jewelid[4];
1205} __packed;
1206
1207static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1208 int target_data_len)
1209{
1210 u8 ssd;
1211 u8 platconf;
1212
1213 if (target_data_len < sizeof(struct pn533_target_jewel))
1214 return false;
1215
1216 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1217 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1218 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1219
1220 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1221 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1222 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1223 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1224 return false;
1225
1226 return true;
1227}
1228
1229static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1230 int tgt_data_len)
1231{
1232 struct pn533_target_jewel *tgt_jewel;
1233
37cf4fc6 1234 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1235
1236 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1237 return -EPROTO;
1238
1239 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1240 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1241 nfc_tgt->nfcid1_len = 4;
1242 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1243
1244 return 0;
1245}
1246
1247struct pn533_type_b_prot_info {
1248 u8 bitrate;
1249 u8 fsci_type;
1250 u8 fwi_adc_fo;
1251} __packed;
1252
1253#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1254#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1255#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1256
1257struct pn533_type_b_sens_res {
1258 u8 opcode;
1259 u8 nfcid[4];
1260 u8 appdata[4];
1261 struct pn533_type_b_prot_info prot_info;
1262} __packed;
1263
1264#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1265
1266struct pn533_target_type_b {
1267 struct pn533_type_b_sens_res sensb_res;
1268 u8 attrib_res_len;
1269 u8 attrib_res[];
1270} __packed;
1271
1272static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1273 int target_data_len)
1274{
1275 if (target_data_len < sizeof(struct pn533_target_type_b))
1276 return false;
1277
1278 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1279 return false;
1280
1281 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1282 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1283 return false;
1284
1285 return true;
1286}
1287
1288static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1289 int tgt_data_len)
1290{
1291 struct pn533_target_type_b *tgt_type_b;
1292
37cf4fc6 1293 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1294
1295 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1296 return -EPROTO;
1297
01d719a2 1298 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1299
1300 return 0;
1301}
1302
b5193e5d
WR		 1303static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1304 int tgdata_len)
c46ee386 1305{
c46ee386
AAJ		 1306 struct nfc_target nfc_tgt;
1307 int rc;
1308
1309 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
b5193e5d 1310 dev->poll_mod_curr);
c46ee386 1311
b5193e5d 1312 if (tg != 1)
c46ee386
AAJ		 1313 return -EPROTO;
1314
98b3ac1b
SO		 1315 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1316
c46ee386
AAJ		 1317 switch (dev->poll_mod_curr) {
1318 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1319 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1320 break;
1321 case PN533_POLL_MOD_212KBPS_FELICA:
1322 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1323 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1324 break;
1325 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1326 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1327 break;
1328 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1329 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1330 break;
1331 default:
b5193e5d
WR		 1332 nfc_dev_err(&dev->interface->dev,
1333 "Unknown current poll modulation");
c46ee386
AAJ		 1334 return -EPROTO;
1335 }
1336
1337 if (rc)
1338 return rc;
1339
1340 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b5193e5d
WR		 1341 nfc_dev_dbg(&dev->interface->dev,
1342 "The Tg found doesn't have the desired protocol");
c46ee386
AAJ		 1343 return -EAGAIN;
1344 }
1345
b5193e5d
WR		 1346 nfc_dev_dbg(&dev->interface->dev,
1347 "Target found - supported protocols: 0x%x",
1348 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1349
1350 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1351
1352 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1353
1354 return 0;
1355}
1356
6fbbdc16
SO		 1357static inline void pn533_poll_next_mod(struct pn533 *dev)
1358{
1359 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1360}
1361
c46ee386
AAJ		 1362static void pn533_poll_reset_mod_list(struct pn533 *dev)
1363{
1364 dev->poll_mod_count = 0;
1365}
1366
1367static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1368{
1369 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1370 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1371 dev->poll_mod_count++;
1372}
1373
6fbbdc16
SO		 1374static void pn533_poll_create_mod_list(struct pn533 *dev,
1375 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1376{
1377 pn533_poll_reset_mod_list(dev);
1378
b08e8603
WR		 1379 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1380 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1381 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1382 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1383
b08e8603
WR		 1384 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1385 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1386 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1387 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1388 }
1389
6fbbdc16 1390 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1391 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1392
01d719a2 1393 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1394 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1395
6fbbdc16
SO		 1396 if (tm_protocols)
1397 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1398}
1399
b5193e5d 1400static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1401{
b5193e5d
WR		 1402 u8 nbtg, tg, *tgdata;
1403 int rc, tgdata_len;
c46ee386
AAJ		 1404
1405 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1406
b5193e5d
WR		 1407 nbtg = resp->data[0];
1408 tg = resp->data[1];
1409 tgdata = &resp->data[2];
1410 tgdata_len = resp->len - 2; /* nbtg + tg */
1411
1412 if (nbtg) {
1413 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1414
1415 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1416 if (rc == 0) {
1417 pn533_poll_reset_mod_list(dev);
1418 return 0;
1419 }
c46ee386
AAJ		 1420 }
1421
6fbbdc16 1422 return -EAGAIN;
c46ee386
AAJ		 1423}
1424
b5193e5d 1425static struct sk_buff *pn533_alloc_poll_tg_frame(u8 *gbytes, size_t gbytes_len)
ad3823ce 1426{
b5193e5d
WR		 1427 struct sk_buff *skb;
1428 u8 *felica, *nfcid3, *gb;
1429
51d9e803
SO		 1430 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1431 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1432 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1433 0xff, 0xff}; /* System code */
b5193e5d 1434
51d9e803
SO		 1435 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1436 0x0, 0x0, 0x0,
1437 0x40}; /* SEL_RES for DEP */
ad3823ce 1438
b5193e5d
WR		 1439 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1440 felica (18), nfcid3 (10), gb_len (1) */
1441 gbytes_len +
1442 1; /* len Tk*/
ad3823ce 1443
b5193e5d
WR		 1444 skb = pn533_alloc_skb(skb_len);
1445 if (!skb)
1446 return NULL;
ad3823ce
SO		 1447
1448 /* DEP support only */
b5193e5d
WR		 1449 *skb_put(skb, 1) |= PN533_INIT_TARGET_DEP;
1450
1451 /* MIFARE params */
1452 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1453
1454 /* Felica params */
b5193e5d
WR		 1455 felica = skb_put(skb, 18);
1456 memcpy(felica, felica_params, 18);
1457 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1458
1459 /* NFCID3 */
b5193e5d
WR		 1460 nfcid3 = skb_put(skb, 10);
1461 memset(nfcid3, 0, 10);
1462 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1463
1464 /* General bytes */
b5193e5d 1465 *skb_put(skb, 1) = gbytes_len;
51d9e803 1466
b5193e5d
WR		 1467 gb = skb_put(skb, gbytes_len);
1468 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1469
b5193e5d
WR		 1470 /* Len Tk */
1471 *skb_put(skb, 1) = 0;
51d9e803 1472
b5193e5d 1473 return skb;
ad3823ce
SO		 1474}
1475
b1bb290a 1476#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1477#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1478static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1479 struct sk_buff *resp)
103b34cf 1480{
e4878823 1481 u8 status;
103b34cf
SO		 1482
1483 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1484
e4878823
WR		 1485 if (IS_ERR(resp))
1486 return PTR_ERR(resp);
103b34cf 1487
e4878823
WR		 1488 status = resp->data[0];
1489 skb_pull(resp, sizeof(status));
103b34cf 1490
e4878823 1491 if (status != 0) {
103b34cf 1492 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1493 dev->tgt_mode = 0;
e4878823 1494 dev_kfree_skb(resp);
103b34cf
SO		 1495 return 0;
1496 }
1497
e4878823 1498 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1499}
1500
1501static void pn533_wq_tg_get_data(struct work_struct *work)
1502{
1503 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1504
e4878823
WR		 1505 struct sk_buff *skb;
1506 int rc;
103b34cf 1507
e4878823 1508 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1509
e4878823
WR		 1510 skb = pn533_alloc_skb(0);
1511 if (!skb)
103b34cf
SO		 1512 return;
1513
e4878823
WR		 1514 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1515 pn533_tm_get_data_complete, NULL);
103b34cf 1516
e4878823
WR		 1517 if (rc < 0)
1518 dev_kfree_skb(skb);
103b34cf
SO		 1519
1520 return;
1521}
1522
fc40a8c1 1523#define ATR_REQ_GB_OFFSET 17
b5193e5d 1524static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1525{
b5193e5d 1526 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1527 size_t gb_len;
103b34cf 1528 int rc;
ad3823ce
SO		 1529
1530 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1531
b5193e5d 1532 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1533 return -EINVAL;
1534
b5193e5d
WR		 1535 mode = resp->data[0];
1536 cmd = &resp->data[1];
ad3823ce 1537
b5193e5d
WR		 1538 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1539 mode, resp->len);
ad3823ce 1540
b5193e5d
WR		 1541 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1542 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1543 comm_mode = NFC_COMM_ACTIVE;
1544
b5193e5d 1545 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1546 return -EOPNOTSUPP;
1547
b5193e5d
WR		 1548 gb = cmd + ATR_REQ_GB_OFFSET;
1549 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1550
103b34cf
SO		 1551 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1552 comm_mode, gb, gb_len);
1553 if (rc < 0) {
1554 nfc_dev_err(&dev->interface->dev,
1555 "Error when signaling target activation");
1556 return rc;
1557 }
1558
51ad304c 1559 dev->tgt_mode = 1;
103b34cf
SO		 1560 queue_work(dev->wq, &dev->tg_work);
1561
1562 return 0;
fe7c5800
SO		 1563}
1564
6fbbdc16 1565static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1566{
37cf4fc6 1567 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16
SO		 1568
1569 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1570
1571 /* An ack will cancel the last issued command (poll) */
1572 pn533_send_ack(dev, GFP_ATOMIC);
1573
1574 dev->cancel_listen = 1;
1575
6fbbdc16
SO		 1576 pn533_poll_next_mod(dev);
1577
1578 queue_work(dev->wq, &dev->poll_work);
1579}
1580
1581static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1582 struct sk_buff *resp)
6fbbdc16
SO		 1583{
1584 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1585 int rc;
1586
6fbbdc16 1587 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1588
b5193e5d
WR		 1589 if (IS_ERR(resp)) {
1590 rc = PTR_ERR(resp);
1591
1592 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1593 __func__, rc);
1594
1595 if (rc == -ENOENT) {
1596 if (dev->poll_mod_count != 0)
1597 return rc;
1598 else
1599 goto stop_poll;
1600 } else if (rc < 0) {
1601 nfc_dev_err(&dev->interface->dev,
1602 "Error %d when running poll", rc);
1603 goto stop_poll;
1604 }
6fbbdc16 1605 }
ad3823ce 1606
6fbbdc16
SO		 1607 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1608
b5193e5d 1609 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1610 del_timer(&dev->listen_timer);
b5193e5d
WR		 1611 rc = pn533_init_target_complete(dev, resp);
1612 goto done;
6fbbdc16
SO		 1613 }
1614
b5193e5d
WR		 1615 /* Initiator mode */
1616 rc = pn533_start_poll_complete(dev, resp);
1617 if (!rc)
1618 goto done;
6fbbdc16 1619
b5193e5d 1620 pn533_poll_next_mod(dev);
6fbbdc16
SO		 1621 queue_work(dev->wq, &dev->poll_work);
1622
b5193e5d
WR		 1623done:
1624 dev_kfree_skb(resp);
1625 return rc;
6fbbdc16
SO		 1626
1627stop_poll:
b5193e5d
WR		 1628 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1629
6fbbdc16
SO		 1630 pn533_poll_reset_mod_list(dev);
1631 dev->poll_protocols = 0;
b5193e5d 1632 return rc;
ad3823ce
SO		 1633}
1634
b5193e5d
WR		 1635static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533_poll_modulations
1636 *mod)
c46ee386 1637{
b5193e5d 1638 struct sk_buff *skb;
c46ee386 1639
b5193e5d
WR		 1640 skb = pn533_alloc_skb(mod->len);
1641 if (!skb)
1642 return NULL;
c46ee386 1643
b5193e5d 1644 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1645
b5193e5d 1646 return skb;
6fbbdc16 1647}
c46ee386 1648
6fbbdc16
SO		 1649static int pn533_send_poll_frame(struct pn533 *dev)
1650{
b5193e5d
WR		 1651 struct pn533_poll_modulations *mod;
1652 struct sk_buff *skb;
6fbbdc16 1653 int rc;
b5193e5d 1654 u8 cmd_code;
c46ee386 1655
b5193e5d 1656 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1657
b5193e5d
WR		 1658 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1659 __func__, mod->len);
c46ee386 1660
b5193e5d
WR		 1661 if (mod->len == 0) { /* Listen mode */
1662 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1663 skb = pn533_alloc_poll_tg_frame(dev->gb, dev->gb_len);
1664 } else { /* Polling mode */
1665 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1666 skb = pn533_alloc_poll_in_frame(mod);
1667 }
1668
1669 if (!skb) {
1670 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1671 return -ENOMEM;
1672 }
1673
1674 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1675 NULL);
1676 if (rc < 0) {
1677 dev_kfree_skb(skb);
6fbbdc16 1678 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1679 }
c46ee386 1680
6fbbdc16
SO		 1681 return rc;
1682}
1683
1684static void pn533_wq_poll(struct work_struct *work)
1685{
1686 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1687 struct pn533_poll_modulations *cur_mod;
1688 int rc;
1689
1690 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1691
1692 nfc_dev_dbg(&dev->interface->dev,
1693 "%s cancel_listen %d modulation len %d",
1694 __func__, dev->cancel_listen, cur_mod->len);
1695
1696 if (dev->cancel_listen == 1) {
1697 dev->cancel_listen = 0;
1698 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1699 }
1700
6fbbdc16
SO		 1701 rc = pn533_send_poll_frame(dev);
1702 if (rc)
1703 return;
c46ee386 1704
6fbbdc16
SO		 1705 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1706 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1707
6fbbdc16 1708 return;
c46ee386
AAJ		 1709}
1710
fe7c5800
SO		 1711static int pn533_start_poll(struct nfc_dev *nfc_dev,
1712 u32 im_protocols, u32 tm_protocols)
1713{
1714 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1715
1716 nfc_dev_dbg(&dev->interface->dev,
1717 "%s: im protocols 0x%x tm protocols 0x%x",
1718 __func__, im_protocols, tm_protocols);
1719
1720 if (dev->tgt_active_prot) {
1721 nfc_dev_err(&dev->interface->dev,
1722 "Cannot poll with a target already activated");
1723 return -EBUSY;
1724 }
1725
51ad304c
SO		 1726 if (dev->tgt_mode) {
1727 nfc_dev_err(&dev->interface->dev,
1728 "Cannot poll while already being activated");
1729 return -EBUSY;
1730 }
1731
6fbbdc16
SO		 1732 if (tm_protocols) {
1733 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1734 if (dev->gb == NULL)
1735 tm_protocols = 0;
1736 }
ad3823ce 1737
6fbbdc16
SO		 1738 dev->poll_mod_curr = 0;
1739 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1740 dev->poll_protocols = im_protocols;
1741 dev->listen_protocols = tm_protocols;
ad3823ce 1742
6fbbdc16 1743 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1744}
1745
c46ee386
AAJ		 1746static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1747{
1748 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1749
1750 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1751
6fbbdc16
SO		 1752 del_timer(&dev->listen_timer);
1753
c46ee386 1754 if (!dev->poll_mod_count) {
6ca55372
WR		 1755 nfc_dev_dbg(&dev->interface->dev,
1756 "Polling operation was not running");
c46ee386
AAJ		 1757 return;
1758 }
1759
1760 /* An ack will cancel the last issued command (poll) */
1761 pn533_send_ack(dev, GFP_KERNEL);
1762
1763 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1764 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1765
1766 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1767}
1768
1769static int pn533_activate_target_nfcdep(struct pn533 *dev)
1770{
cb950d93 1771 struct pn533_cmd_activate_response *rsp;
541d920b 1772 u16 gt_len;
c46ee386
AAJ		 1773 int rc;
1774
cb950d93
WR		 1775 struct sk_buff *skb;
1776 struct sk_buff *resp;
c46ee386 1777
cb950d93 1778 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1779
cb950d93
WR		 1780 skb = pn533_alloc_skb(sizeof(u8) * 2); /*TG + Next*/
1781 if (!skb)
1782 return -ENOMEM;
c46ee386 1783
cb950d93
WR		 1784 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1785 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1786
cb950d93
WR		 1787 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1788 if (IS_ERR(resp))
1789 return PTR_ERR(resp);
c46ee386 1790
37cf4fc6 1791 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1792 rc = rsp->status & PN533_CMD_RET_MASK;
c46ee386 1793 if (rc != PN533_CMD_RET_SUCCESS)
cb950d93 1794 dev_kfree_skb(resp);
c46ee386
AAJ		 1795 return -EIO;
1796
541d920b 1797 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1798 gt_len = resp->len - 16;
1799 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1800
cb950d93 1801 dev_kfree_skb(resp);
541d920b 1802 return rc;
c46ee386
AAJ		 1803}
1804
90099433
EL		 1805static int pn533_activate_target(struct nfc_dev *nfc_dev,
1806 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1807{
1808 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1809 int rc;
1810
1811 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
5d467742 1812 protocol);
c46ee386
AAJ		 1813
1814 if (dev->poll_mod_count) {
6ca55372
WR		 1815 nfc_dev_err(&dev->interface->dev,
1816 "Cannot activate while polling");
c46ee386
AAJ		 1817 return -EBUSY;
1818 }
1819
1820 if (dev->tgt_active_prot) {
6ca55372
WR		 1821 nfc_dev_err(&dev->interface->dev,
1822 "There is already an active target");
c46ee386
AAJ		 1823 return -EBUSY;
1824 }
1825
1826 if (!dev->tgt_available_prots) {
6ca55372
WR		 1827 nfc_dev_err(&dev->interface->dev,
1828 "There is no available target to activate");
c46ee386
AAJ		 1829 return -EINVAL;
1830 }
1831
1832 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 1833 nfc_dev_err(&dev->interface->dev,
1834 "Target doesn't support requested proto %u",
1835 protocol);
c46ee386
AAJ		 1836 return -EINVAL;
1837 }
1838
1839 if (protocol == NFC_PROTO_NFC_DEP) {
1840 rc = pn533_activate_target_nfcdep(dev);
1841 if (rc) {
6ca55372
WR		 1842 nfc_dev_err(&dev->interface->dev,
1843 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 1844 return rc;
1845 }
1846 }
1847
1848 dev->tgt_active_prot = protocol;
1849 dev->tgt_available_prots = 0;
1850
1851 return 0;
1852}
1853
90099433
EL		 1854static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1855 struct nfc_target *target)
c46ee386
AAJ		 1856{
1857 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1858
1859 struct sk_buff *skb;
1860 struct sk_buff *resp;
1861
c46ee386
AAJ		 1862 int rc;
1863
1864 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1865
1866 if (!dev->tgt_active_prot) {
1867 nfc_dev_err(&dev->interface->dev, "There is no active target");
1868 return;
1869 }
1870
1871 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1872 skb_queue_purge(&dev->resp_q);
1873
cb950d93
WR		 1874 skb = pn533_alloc_skb(sizeof(u8));
1875 if (!skb)
1876 return;
c46ee386 1877
cb950d93 1878 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1879
cb950d93
WR		 1880 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1881 if (IS_ERR(resp))
c46ee386 1882 return;
c46ee386 1883
cb950d93 1884 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 1885 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 1886 nfc_dev_err(&dev->interface->dev,
1887 "Error 0x%x when releasing the target", rc);
c46ee386 1888
cb950d93 1889 dev_kfree_skb(resp);
c46ee386
AAJ		 1890 return;
1891}
1892
361f3cb7
SO		 1893
1894static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1895 struct sk_buff *resp)
361f3cb7 1896{
13003649 1897 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1898 u8 target_gt_len;
1899 int rc;
13003649 1900 u8 active = *(u8 *)arg;
70418e6e
WR		 1901
1902 kfree(arg);
361f3cb7 1903
13003649
WR		 1904 if (IS_ERR(resp))
1905 return PTR_ERR(resp);
361f3cb7
SO		 1906
1907 if (dev->tgt_available_prots &&
1908 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1909 nfc_dev_err(&dev->interface->dev,
5d467742 1910 "The target does not support DEP");
13003649
WR		 1911 rc = -EINVAL;
1912 goto error;
361f3cb7
SO		 1913 }
1914
13003649
WR		 1915 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1916
1917 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1918 if (rc != PN533_CMD_RET_SUCCESS) {
1919 nfc_dev_err(&dev->interface->dev,
5d467742 1920 "Bringing DEP link up failed %d", rc);
13003649 1921 goto error;
361f3cb7
SO		 1922 }
1923
1924 if (!dev->tgt_available_prots) {
13003649
WR		 1925 struct nfc_target nfc_target;
1926
361f3cb7
SO		 1927 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1928
1929 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1930 nfc_target.nfcid1_len = 10;
13003649 1931 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1932 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1933 if (rc)
13003649 1934 goto error;
361f3cb7
SO		 1935
1936 dev->tgt_available_prots = 0;
1937 }
1938
1939 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1940
1941 /* ATR_RES general bytes are located at offset 17 */
13003649 1942 target_gt_len = resp->len - 17;
361f3cb7 1943 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1944 rsp->gt, target_gt_len);
361f3cb7
SO		 1945 if (rc == 0)
1946 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1947 dev->nfc_dev->targets[0].idx,
1948 !active, NFC_RF_INITIATOR);
361f3cb7 1949
13003649
WR		 1950error:
1951 dev_kfree_skb(resp);
1952 return rc;
361f3cb7
SO		 1953}
1954
41a8ec49
SO		 1955static int pn533_mod_to_baud(struct pn533 *dev)
1956{
1957 switch (dev->poll_mod_curr) {
1958 case PN533_POLL_MOD_106KBPS_A:
1959 return 0;
1960 case PN533_POLL_MOD_212KBPS_FELICA:
1961 return 1;
1962 case PN533_POLL_MOD_424KBPS_FELICA:
1963 return 2;
1964 default:
1965 return -EINVAL;
1966 }
1967}
1968
d7f3345d 1969#define PASSIVE_DATA_LEN 5
90099433 1970static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 1971 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 1972{
1973 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 1974 struct sk_buff *skb;
1975 int rc, baud, skb_len;
1976 u8 *next, *arg;
1977
d7f3345d 1978 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 1979
1980 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1981
361f3cb7
SO		 1982 if (dev->poll_mod_count) {
1983 nfc_dev_err(&dev->interface->dev,
5d467742 1984 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 1985 return -EBUSY;
1986 }
1987
1988 if (dev->tgt_active_prot) {
1989 nfc_dev_err(&dev->interface->dev,
5d467742 1990 "There is already an active target");
361f3cb7
SO		 1991 return -EBUSY;
1992 }
1993
41a8ec49
SO		 1994 baud = pn533_mod_to_baud(dev);
1995 if (baud < 0) {
1996 nfc_dev_err(&dev->interface->dev,
1997 "Invalid curr modulation %d", dev->poll_mod_curr);
1998 return baud;
1999 }
2000
13003649 2001 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 2002 if (comm_mode == NFC_COMM_PASSIVE)
13003649 2003 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2004
13003649
WR		 2005 skb = pn533_alloc_skb(skb_len);
2006 if (!skb)
361f3cb7
SO		 2007 return -ENOMEM;
2008
13003649
WR		 2009 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2010 *skb_put(skb, 1) = baud; /* Baud rate */
2011
2012 next = skb_put(skb, 1); /* Next */
2013 *next = 0;
361f3cb7 2014
13003649
WR		 2015 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2016 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2017 PASSIVE_DATA_LEN);
2018 *next |= 1;
d7f3345d
SO		 2019 }
2020
47807d3d 2021 if (gb != NULL && gb_len > 0) {
13003649
WR		 2022 memcpy(skb_put(skb, gb_len), gb, gb_len);
2023 *next |= 4; /* We have some Gi */
361f3cb7 2024 } else {
13003649 2025 *next = 0;
361f3cb7
SO		 2026 }
2027
13003649
WR		 2028 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2029 if (!arg) {
2030 dev_kfree_skb(skb);
2031 return -ENOMEM;
2032 }
361f3cb7 2033
13003649 2034 *arg = !comm_mode;
361f3cb7 2035
13003649
WR		 2036 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2037 pn533_in_dep_link_up_complete, arg);
2038
2039 if (rc < 0) {
2040 dev_kfree_skb(skb);
2041 kfree(arg);
2042 }
361f3cb7
SO		 2043
2044 return rc;
2045}
2046
2047static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2048{
6fbbdc16
SO		 2049 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2050
2051 pn533_poll_reset_mod_list(dev);
2052
51ad304c
SO		 2053 if (dev->tgt_mode || dev->tgt_active_prot) {
2054 pn533_send_ack(dev, GFP_KERNEL);
2055 usb_kill_urb(dev->in_urb);
2056 }
2057
2058 dev->tgt_active_prot = 0;
2059 dev->tgt_mode = 0;
2060
2061 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2062
2063 return 0;
2064}
2065
c46ee386 2066struct pn533_data_exchange_arg {
c46ee386
AAJ		 2067 data_exchange_cb_t cb;
2068 void *cb_context;
2069};
2070
6ff73fd2
SO		 2071static struct sk_buff *pn533_build_response(struct pn533 *dev)
2072{
2073 struct sk_buff *skb, *tmp, *t;
2074 unsigned int skb_len = 0, tmp_len = 0;
2075
2076 nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
2077
2078 if (skb_queue_empty(&dev->resp_q))
2079 return NULL;
2080
2081 if (skb_queue_len(&dev->resp_q) == 1) {
2082 skb = skb_dequeue(&dev->resp_q);
2083 goto out;
2084 }
2085
2086 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2087 skb_len += tmp->len;
2088
2089 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2090 __func__, skb_len);
2091
2092 skb = alloc_skb(skb_len, GFP_KERNEL);
2093 if (skb == NULL)
2094 goto out;
2095
2096 skb_put(skb, skb_len);
2097
2098 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2099 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2100 tmp_len += tmp->len;
2101 }
2102
2103out:
2104 skb_queue_purge(&dev->resp_q);
2105
2106 return skb;
2107}
2108
c46ee386 2109static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2110 struct sk_buff *resp)
c46ee386
AAJ		 2111{
2112 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2113 struct sk_buff *skb;
2114 int rc = 0;
2115 u8 status, ret, mi;
c46ee386
AAJ		 2116
2117 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2118
b1e666f5
WR		 2119 if (IS_ERR(resp)) {
2120 rc = PTR_ERR(resp);
2121 goto _error;
c46ee386
AAJ		 2122 }
2123
b1e666f5
WR		 2124 status = resp->data[0];
2125 ret = status & PN533_CMD_RET_MASK;
2126 mi = status & PN533_CMD_MI_MASK;
2127
2128 skb_pull(resp, sizeof(status));
c46ee386 2129
b1e666f5
WR		 2130 if (ret != PN533_CMD_RET_SUCCESS) {
2131 nfc_dev_err(&dev->interface->dev,
2132 "PN533 reported error %d when exchanging data",
2133 ret);
2134 rc = -EIO;
c46ee386
AAJ		 2135 goto error;
2136 }
2137
b1e666f5 2138 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2139
b1e666f5
WR		 2140 if (mi) {
2141 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2142 queue_work(dev->wq, &dev->mi_work);
2143 return -EINPROGRESS;
c46ee386
AAJ		 2144 }
2145
6ff73fd2 2146 skb = pn533_build_response(dev);
b1e666f5 2147 if (!skb)
6ff73fd2 2148 goto error;
c46ee386 2149
6ff73fd2 2150 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2151 kfree(arg);
2152 return 0;
2153
2154error:
b1e666f5
WR		 2155 dev_kfree_skb(resp);
2156_error:
6ff73fd2 2157 skb_queue_purge(&dev->resp_q);
b1e666f5 2158 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2159 kfree(arg);
b1e666f5 2160 return rc;
c46ee386
AAJ		 2161}
2162
be9ae4ce
SO		 2163static int pn533_transceive(struct nfc_dev *nfc_dev,
2164 struct nfc_target *target, struct sk_buff *skb,
2165 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2166{
2167 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2168 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2169 int rc;
2170
2171 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2172
b1e666f5
WR		 2173 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2174 /* TODO: Implement support to multi-part data exchange */
2175 nfc_dev_err(&dev->interface->dev,
2176 "Data length greater than the max allowed: %d",
2177 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2178 rc = -ENOSYS;
2179 goto error;
2180 }
2181
c46ee386 2182 if (!dev->tgt_active_prot) {
6ca55372
WR		 2183 nfc_dev_err(&dev->interface->dev,
2184 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2185 rc = -EINVAL;
2186 goto error;
2187 }
2188
b1e666f5 2189 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2190 if (!arg) {
2191 rc = -ENOMEM;
b1e666f5 2192 goto error;
c46ee386
AAJ		 2193 }
2194
c46ee386
AAJ		 2195 arg->cb = cb;
2196 arg->cb_context = cb_context;
2197
b1e666f5
WR		 2198 switch (dev->device_type) {
2199 case PN533_DEVICE_PASORI:
2200 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2201 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2202 skb,
2203 pn533_data_exchange_complete,
2204 arg);
2205
2206 break;
2207 }
2208 default:
2209 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2210
2211 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2212 skb, pn533_data_exchange_complete,
2213 arg);
2214
2215 break;
c46ee386
AAJ		 2216 }
2217
b1e666f5
WR		 2218 if (rc < 0) /* rc from send_async */
2219 goto error;
2220
c46ee386
AAJ		 2221 return 0;
2222
c46ee386 2223error:
b1e666f5
WR		 2224 kfree(arg);
2225 dev_kfree_skb(skb);
c46ee386
AAJ		 2226 return rc;
2227}
2228
dadb06f2 2229static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2230 struct sk_buff *resp)
dadb06f2 2231{
e4878823 2232 u8 status;
5b412fd1 2233
dadb06f2
SO		 2234 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2235
e4878823
WR		 2236 if (IS_ERR(resp))
2237 return PTR_ERR(resp);
5b412fd1 2238
e4878823 2239 status = resp->data[0];
dadb06f2 2240
e4878823 2241 dev_kfree_skb(resp);
dadb06f2 2242
e4878823 2243 if (status != 0) {
dadb06f2
SO		 2244 nfc_tm_deactivated(dev->nfc_dev);
2245
51ad304c
SO		 2246 dev->tgt_mode = 0;
2247
dadb06f2
SO		 2248 return 0;
2249 }
2250
2251 queue_work(dev->wq, &dev->tg_work);
2252
2253 return 0;
2254}
2255
2256static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2257{
2258 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2259 int rc;
2260
2261 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2262
e4878823 2263 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2264 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2265 "Data length greater than the max allowed: %d",
2266 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2267 return -ENOSYS;
dadb06f2
SO		 2268 }
2269
e4878823
WR		 2270 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2271 pn533_tm_send_complete, NULL);
2272 if (rc < 0)
2273 dev_kfree_skb(skb);
dadb06f2
SO		 2274
2275 return rc;
2276}
2277
6ff73fd2
SO		 2278static void pn533_wq_mi_recv(struct work_struct *work)
2279{
2280 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2281
2282 struct sk_buff *skb;
6ff73fd2
SO		 2283 int rc;
2284
2285 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2286
b1e666f5
WR		 2287 skb = pn533_alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN);
2288 if (!skb)
2289 goto error;
6ff73fd2 2290
b1e666f5
WR		 2291 switch (dev->device_type) {
2292 case PN533_DEVICE_PASORI:
2293 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2294 rc = pn533_send_cmd_direct_async(dev,
2295 PN533_CMD_IN_COMM_THRU,
2296 skb,
2297 pn533_data_exchange_complete,
2298 dev->cmd_complete_mi_arg);
6ff73fd2 2299
b1e666f5
WR		 2300 break;
2301 }
2302 default:
2303 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2304
b1e666f5
WR		 2305 rc = pn533_send_cmd_direct_async(dev,
2306 PN533_CMD_IN_DATA_EXCHANGE,
2307 skb,
2308 pn533_data_exchange_complete,
2309 dev->cmd_complete_mi_arg);
b1bb290a 2310
b1e666f5 2311 break;
6ff73fd2
SO		 2312 }
2313
b1e666f5 2314 if (rc == 0) /* success */
6ff73fd2
SO		 2315 return;
2316
b1e666f5
WR		 2317 nfc_dev_err(&dev->interface->dev,
2318 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2319
b1e666f5
WR		 2320 dev_kfree_skb(skb);
2321 kfree(dev->cmd_complete_arg);
6ff73fd2 2322
b1e666f5 2323error:
6ff73fd2 2324 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2325 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2326}
2327
c46ee386
AAJ		 2328static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2329 u8 cfgdata_len)
2330{
cb950d93
WR		 2331 struct sk_buff *skb;
2332 struct sk_buff *resp;
2333
2334 int skb_len;
c46ee386
AAJ		 2335
2336 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2337
cb950d93 2338 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2339
cb950d93
WR		 2340 skb = pn533_alloc_skb(skb_len);
2341 if (!skb)
2342 return -ENOMEM;
c46ee386 2343
cb950d93
WR		 2344 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2345 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2346
cb950d93
WR		 2347 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2348 if (IS_ERR(resp))
2349 return PTR_ERR(resp);
c46ee386 2350
cb950d93
WR		 2351 dev_kfree_skb(resp);
2352 return 0;
2353}
2354
2355static int pn533_get_firmware_version(struct pn533 *dev,
2356 struct pn533_fw_version *fv)
2357{
2358 struct sk_buff *skb;
2359 struct sk_buff *resp;
2360
2361 skb = pn533_alloc_skb(0);
2362 if (!skb)
2363 return -ENOMEM;
2364
2365 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2366 if (IS_ERR(resp))
2367 return PTR_ERR(resp);
2368
2369 fv->ic = resp->data[0];
2370 fv->ver = resp->data[1];
2371 fv->rev = resp->data[2];
2372 fv->support = resp->data[3];
2373
2374 dev_kfree_skb(resp);
2375 return 0;
c46ee386
AAJ		 2376}
2377
5c7b0531
SO		 2378static int pn533_fw_reset(struct pn533 *dev)
2379{
cb950d93
WR		 2380 struct sk_buff *skb;
2381 struct sk_buff *resp;
5c7b0531
SO		 2382
2383 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2384
cb950d93
WR		 2385 skb = pn533_alloc_skb(sizeof(u8));
2386 if (!skb)
2387 return -ENOMEM;
5c7b0531 2388
cb950d93 2389 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2390
cb950d93
WR		 2391 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2392 if (IS_ERR(resp))
2393 return PTR_ERR(resp);
5c7b0531 2394
cb950d93 2395 dev_kfree_skb(resp);
5c7b0531 2396
94c5c156 2397 return 0;
5c7b0531
SO		 2398}
2399
2400static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2401 .dev_up = NULL,
2402 .dev_down = NULL,
361f3cb7
SO		 2403 .dep_link_up = pn533_dep_link_up,
2404 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2405 .start_poll = pn533_start_poll,
2406 .stop_poll = pn533_stop_poll,
2407 .activate_target = pn533_activate_target,
2408 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2409 .im_transceive = pn533_transceive,
dadb06f2 2410 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2411};
2412
5c7b0531
SO		 2413static int pn533_setup(struct pn533 *dev)
2414{
2415 struct pn533_config_max_retries max_retries;
2416 struct pn533_config_timing timing;
2417 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2418 int rc;
2419
2420 switch (dev->device_type) {
2421 case PN533_DEVICE_STD:
2422 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2423 max_retries.mx_rty_psl = 2;
2424 max_retries.mx_rty_passive_act =
2425 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2426
2427 timing.rfu = PN533_CONFIG_TIMING_102;
2428 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2429 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2430
2431 break;
2432
2433 case PN533_DEVICE_PASORI:
2434 max_retries.mx_rty_atr = 0x2;
2435 max_retries.mx_rty_psl = 0x1;
2436 max_retries.mx_rty_passive_act =
2437 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2438
2439 timing.rfu = PN533_CONFIG_TIMING_102;
2440 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2441 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2442
2443 break;
2444
2445 default:
2446 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2447 dev->device_type);
2448 return -EINVAL;
2449 }
2450
2451 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2452 (u8 *)&max_retries, sizeof(max_retries));
2453 if (rc) {
2454 nfc_dev_err(&dev->interface->dev,
2455 "Error on setting MAX_RETRIES config");
2456 return rc;
2457 }
2458
2459
2460 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2461 (u8 *)&timing, sizeof(timing));
2462 if (rc) {
2463 nfc_dev_err(&dev->interface->dev,
2464 "Error on setting RF timings");
2465 return rc;
2466 }
2467
2468 switch (dev->device_type) {
2469 case PN533_DEVICE_STD:
2470 break;
2471
2472 case PN533_DEVICE_PASORI:
2473 pn533_fw_reset(dev);
2474
2475 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2476 pasori_cfg, 3);
2477 if (rc) {
2478 nfc_dev_err(&dev->interface->dev,
2479 "Error while settings PASORI config");
2480 return rc;
2481 }
2482
2483 pn533_fw_reset(dev);
2484
2485 break;
2486 }
2487
2488 return 0;
2489}
2490
c46ee386
AAJ		 2491static int pn533_probe(struct usb_interface *interface,
2492 const struct usb_device_id *id)
2493{
cb950d93 2494 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2495 struct pn533 *dev;
2496 struct usb_host_interface *iface_desc;
2497 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2498 int in_endpoint = 0;
2499 int out_endpoint = 0;
2500 int rc = -ENOMEM;
2501 int i;
2502 u32 protocols;
2503
2504 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2505 if (!dev)
2506 return -ENOMEM;
2507
2508 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2509 dev->interface = interface;
0201ed03 2510 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2511
2512 iface_desc = interface->cur_altsetting;
2513 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2514 endpoint = &iface_desc->endpoint[i].desc;
2515
8d25ca79 2516 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2517 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2518
8d25ca79 2519 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2520 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2521 }
2522
2523 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2524 nfc_dev_err(&interface->dev,
2525 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2526 rc = -ENODEV;
2527 goto error;
2528 }
2529
82dec34d 2530 dev->in_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
c46ee386 2531 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
82dec34d 2532 dev->out_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
c46ee386
AAJ		 2533 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2534
5d467742 2535 if (!dev->in_frame || !dev->out_frame || !dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2536 goto error;
2537
2538 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2539 usb_rcvbulkpipe(dev->udev, in_endpoint),
2540 NULL, 0, NULL, dev);
c46ee386 2541 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2542 usb_sndbulkpipe(dev->udev, out_endpoint),
2543 NULL, 0, pn533_send_complete, dev);
c46ee386 2544
5d50b364
SO		 2545 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2546 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2547 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2548 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2549 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2550 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2551 if (dev->wq == NULL)
2552 goto error;
c46ee386 2553
6fbbdc16
SO		 2554 init_timer(&dev->listen_timer);
2555 dev->listen_timer.data = (unsigned long) dev;
2556 dev->listen_timer.function = pn533_listen_mode_timer;
2557
6ff73fd2
SO		 2558 skb_queue_head_init(&dev->resp_q);
2559
5d50b364
SO		 2560 INIT_LIST_HEAD(&dev->cmd_queue);
2561
c46ee386
AAJ		 2562 usb_set_intfdata(interface, dev);
2563
cb950d93
WR		 2564 memset(&fw_ver, 0, sizeof(fw_ver));
2565 rc = pn533_get_firmware_version(dev, &fw_ver);
2566 if (rc < 0)
4849f85e 2567 goto destroy_wq;
c46ee386 2568
cb950d93
WR		 2569 nfc_dev_info(&dev->interface->dev,
2570 "NXP PN533 firmware ver %d.%d now attached",
2571 fw_ver.ver, fw_ver.rev);
c46ee386 2572
5c7b0531
SO		 2573 dev->device_type = id->driver_info;
2574 switch (dev->device_type) {
2575 case PN533_DEVICE_STD:
2576 protocols = PN533_ALL_PROTOCOLS;
2577 break;
2578
2579 case PN533_DEVICE_PASORI:
2580 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2581 break;
2582
2583 default:
2584 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2585 dev->device_type);
2586 rc = -EINVAL;
2587 goto destroy_wq;
2588 }
c46ee386 2589
e8753043 2590 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
b1bb290a 2591 PN533_FRAME_HEADER_LEN +
e8753043 2592 PN533_CMD_DATAEXCH_HEAD_LEN,
b1bb290a 2593 PN533_FRAME_TAIL_LEN);
c46ee386 2594 if (!dev->nfc_dev)
4849f85e 2595 goto destroy_wq;
c46ee386
AAJ		 2596
2597 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2598 nfc_set_drvdata(dev->nfc_dev, dev);
2599
2600 rc = nfc_register_device(dev->nfc_dev);
2601 if (rc)
2602 goto free_nfc_dev;
2603
5c7b0531
SO		 2604 rc = pn533_setup(dev);
2605 if (rc)
34a85bfc 2606 goto unregister_nfc_dev;
34a85bfc 2607
c46ee386
AAJ		 2608 return 0;
2609
9f2f8ba1
SO		 2610unregister_nfc_dev:
2611 nfc_unregister_device(dev->nfc_dev);
2612
c46ee386
AAJ		 2613free_nfc_dev:
2614 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2615
4849f85e
SO		 2616destroy_wq:
2617 destroy_workqueue(dev->wq);
c46ee386
AAJ		 2618error:
2619 kfree(dev->in_frame);
2620 usb_free_urb(dev->in_urb);
2621 kfree(dev->out_frame);
2622 usb_free_urb(dev->out_urb);
2623 kfree(dev);
2624 return rc;
2625}
2626
2627static void pn533_disconnect(struct usb_interface *interface)
2628{
2629 struct pn533 *dev;
5d50b364 2630 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2631
2632 dev = usb_get_intfdata(interface);
2633 usb_set_intfdata(interface, NULL);
2634
2635 nfc_unregister_device(dev->nfc_dev);
2636 nfc_free_device(dev->nfc_dev);
2637
2638 usb_kill_urb(dev->in_urb);
2639 usb_kill_urb(dev->out_urb);
2640
4849f85e 2641 destroy_workqueue(dev->wq);
c46ee386 2642
6ff73fd2
SO		 2643 skb_queue_purge(&dev->resp_q);
2644
6fbbdc16
SO		 2645 del_timer(&dev->listen_timer);
2646
5d50b364
SO		 2647 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2648 list_del(&cmd->queue);
2649 kfree(cmd);
2650 }
2651
c46ee386
AAJ		 2652 kfree(dev->in_frame);
2653 usb_free_urb(dev->in_urb);
2654 kfree(dev->out_frame);
2655 usb_free_urb(dev->out_urb);
2656 kfree(dev);
2657
276556db 2658 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2659}
2660
2661static struct usb_driver pn533_driver = {
2662 .name = "pn533",
2663 .probe = pn533_probe,
2664 .disconnect = pn533_disconnect,
2665 .id_table = pn533_table,
2666};
2667
fe748483 2668module_usb_driver(pn533_driver);
c46ee386
AAJ		 2669
2670MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
2671 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2672MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2673MODULE_VERSION(VERSION);
2674MODULE_LICENSE("GPL");
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