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NFC: Replace nfc_dev_dbg with dev_dbg
[linux-2.6-block.git] / drivers / nfc / pn533.c
CommitLineData
c46ee386
AAJ		 1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
e70b96e9 3 * Copyright (C) 2012-2013 Tieto Poland
c46ee386
AAJ		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the
17 * Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21#include <linux/device.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/slab.h>
25#include <linux/usb.h>
26#include <linux/nfc.h>
27#include <linux/netdevice.h>
55eb94f9 28#include <net/nfc/nfc.h>
c46ee386 29
495af72e 30#define VERSION "0.2"
c46ee386
AAJ		 31
32#define PN533_VENDOR_ID 0x4CC
33#define PN533_PRODUCT_ID 0x2533
34
35#define SCM_VENDOR_ID 0x4E6
36#define SCL3711_PRODUCT_ID 0x5591
37
5c7b0531
SO		 38#define SONY_VENDOR_ID 0x054c
39#define PASORI_PRODUCT_ID 0x02e1
40
53cf4839
WR		 41#define ACS_VENDOR_ID 0x072f
42#define ACR122U_PRODUCT_ID 0x2200
43
44#define PN533_DEVICE_STD 0x1
45#define PN533_DEVICE_PASORI 0x2
46#define PN533_DEVICE_ACR122U 0x3
5c7b0531 47
01d719a2
SO		 48#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
49 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
50 NFC_PROTO_NFC_DEP_MASK |\
51 NFC_PROTO_ISO14443_B_MASK)
5c7b0531
SO		 52
53#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
54 NFC_PROTO_MIFARE_MASK | \
55 NFC_PROTO_FELICA_MASK | \
01d719a2 56 NFC_PROTO_ISO14443_MASK | \
5c7b0531
SO		 57 NFC_PROTO_NFC_DEP_MASK)
58
c46ee386 59static const struct usb_device_id pn533_table[] = {
5c7b0531
SO		 60 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
61 .idVendor = PN533_VENDOR_ID,
62 .idProduct = PN533_PRODUCT_ID,
63 .driver_info = PN533_DEVICE_STD,
64 },
65 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
66 .idVendor = SCM_VENDOR_ID,
67 .idProduct = SCL3711_PRODUCT_ID,
68 .driver_info = PN533_DEVICE_STD,
69 },
70 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
71 .idVendor = SONY_VENDOR_ID,
72 .idProduct = PASORI_PRODUCT_ID,
73 .driver_info = PN533_DEVICE_PASORI,
74 },
53cf4839
WR		 75 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
76 .idVendor = ACS_VENDOR_ID,
77 .idProduct = ACR122U_PRODUCT_ID,
78 .driver_info = PN533_DEVICE_ACR122U,
79 },
c46ee386
AAJ		 80 { }
81};
82MODULE_DEVICE_TABLE(usb, pn533_table);
83
6fbbdc16
SO		 84/* How much time we spend listening for initiators */
85#define PN533_LISTEN_TIME 2
46f793b0
SO		 86/* Delay between each poll frame (ms) */
87#define PN533_POLL_INTERVAL 10
6fbbdc16 88
1575b9d8 89/* Standard pn533 frame definitions (standard and extended)*/
63123108 90#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
b1bb290a 91 + 2) /* data[0] TFI, data[1] CC */
63123108 92#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82dec34d 93
1575b9d8
OG		 94#define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
95 + 2) /* data[0] TFI, data[1] CC */
96
97#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
98#define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */
99
15461aeb
WR		 100/*
101 * Max extended frame payload len, excluding TFI and CC
102 * which are already in PN533_FRAME_HEADER_LEN.
103 */
63123108 104#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
15461aeb 105
63123108 106#define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
5b5a4437 107 Postamble (1) */
63123108
WR		 108#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
109#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
1575b9d8
OG		 110/* Half start code (3), LEN (4) should be 0xffff for extended frame */
111#define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
112 && (hdr)->datalen_checksum == 0xFF)
113#define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
c46ee386
AAJ		 114
115/* start of frame */
63123108 116#define PN533_STD_FRAME_SOF 0x00FF
c46ee386 117
63123108
WR		 118/* standard frame identifier: in/out/error */
119#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
120#define PN533_STD_FRAME_DIR_OUT 0xD4
121#define PN533_STD_FRAME_DIR_IN 0xD5
c46ee386 122
53cf4839
WR		 123/* ACS ACR122 pn533 frame definitions */
124#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
125 + 2)
126#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
127#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
128 + 2)
129#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
130#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
131
132/* CCID messages types */
133#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
134#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
135
136#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
137
c46ee386 138/* PN533 Commands */
1575b9d8 139#define PN533_FRAME_CMD(f) (f->data[1])
c46ee386
AAJ		 140
141#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
142#define PN533_CMD_RF_CONFIGURATION 0x32
143#define PN533_CMD_IN_DATA_EXCHANGE 0x40
5c7b0531 144#define PN533_CMD_IN_COMM_THRU 0x42
c46ee386
AAJ		 145#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
146#define PN533_CMD_IN_ATR 0x50
147#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 148#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 149
ad3823ce 150#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 151#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 152#define PN533_CMD_TG_SET_DATA 0x8e
aada17ac 153#define PN533_CMD_UNDEF 0xff
ad3823ce 154
c46ee386
AAJ		 155#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
156
157/* PN533 Return codes */
158#define PN533_CMD_RET_MASK 0x3F
159#define PN533_CMD_MI_MASK 0x40
160#define PN533_CMD_RET_SUCCESS 0x00
161
162struct pn533;
163
aada17ac
WR		 164typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
165 struct sk_buff *resp);
166
c46ee386
AAJ		 167/* structs for pn533 commands */
168
169/* PN533_CMD_GET_FIRMWARE_VERSION */
170struct pn533_fw_version {
171 u8 ic;
172 u8 ver;
173 u8 rev;
174 u8 support;
175};
176
177/* PN533_CMD_RF_CONFIGURATION */
60d9edd5
SO		 178#define PN533_CFGITEM_RF_FIELD 0x01
179#define PN533_CFGITEM_TIMING 0x02
c46ee386 180#define PN533_CFGITEM_MAX_RETRIES 0x05
60d9edd5
SO		 181#define PN533_CFGITEM_PASORI 0x82
182
3a8eab39
SO		 183#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
184#define PN533_CFGITEM_RF_FIELD_ON 0x1
185#define PN533_CFGITEM_RF_FIELD_OFF 0x0
c46ee386 186
34a85bfc
SO		 187#define PN533_CONFIG_TIMING_102 0xb
188#define PN533_CONFIG_TIMING_204 0xc
189#define PN533_CONFIG_TIMING_409 0xd
190#define PN533_CONFIG_TIMING_819 0xe
191
c46ee386
AAJ		 192#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
193#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
194
195struct pn533_config_max_retries {
196 u8 mx_rty_atr;
197 u8 mx_rty_psl;
198 u8 mx_rty_passive_act;
199} __packed;
200
34a85bfc
SO		 201struct pn533_config_timing {
202 u8 rfu;
203 u8 atr_res_timeout;
204 u8 dep_timeout;
205} __packed;
206
c46ee386
AAJ		 207/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
208
209/* felica commands opcode */
210#define PN533_FELICA_OPC_SENSF_REQ 0
211#define PN533_FELICA_OPC_SENSF_RES 1
212/* felica SENSF_REQ parameters */
213#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
214#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
215#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
216#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
217
218/* type B initiator_data values */
219#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
220#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
221#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
222
223union pn533_cmd_poll_initdata {
224 struct {
225 u8 afi;
226 u8 polling_method;
227 } __packed type_b;
228 struct {
229 u8 opcode;
230 __be16 sc;
231 u8 rc;
232 u8 tsn;
233 } __packed felica;
234};
235
236/* Poll modulations */
237enum {
238 PN533_POLL_MOD_106KBPS_A,
239 PN533_POLL_MOD_212KBPS_FELICA,
240 PN533_POLL_MOD_424KBPS_FELICA,
241 PN533_POLL_MOD_106KBPS_JEWEL,
242 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 243 PN533_LISTEN_MOD,
c46ee386
AAJ		 244
245 __PN533_POLL_MOD_AFTER_LAST,
246};
247#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
248
249struct pn533_poll_modulations {
250 struct {
251 u8 maxtg;
252 u8 brty;
253 union pn533_cmd_poll_initdata initiator_data;
254 } __packed data;
255 u8 len;
256};
257
ef3d56e1 258static const struct pn533_poll_modulations poll_mod[] = {
c46ee386
AAJ		 259 [PN533_POLL_MOD_106KBPS_A] = {
260 .data = {
261 .maxtg = 1,
262 .brty = 0,
263 },
264 .len = 2,
265 },
266 [PN533_POLL_MOD_212KBPS_FELICA] = {
267 .data = {
268 .maxtg = 1,
269 .brty = 1,
270 .initiator_data.felica = {
271 .opcode = PN533_FELICA_OPC_SENSF_REQ,
272 .sc = PN533_FELICA_SENSF_SC_ALL,
a94e10f7 273 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
31c44464 274 .tsn = 0x03,
c46ee386
AAJ		 275 },
276 },
277 .len = 7,
278 },
279 [PN533_POLL_MOD_424KBPS_FELICA] = {
280 .data = {
281 .maxtg = 1,
282 .brty = 2,
283 .initiator_data.felica = {
284 .opcode = PN533_FELICA_OPC_SENSF_REQ,
285 .sc = PN533_FELICA_SENSF_SC_ALL,
a94e10f7 286 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
31c44464 287 .tsn = 0x03,
c46ee386
AAJ		 288 },
289 },
290 .len = 7,
291 },
292 [PN533_POLL_MOD_106KBPS_JEWEL] = {
293 .data = {
294 .maxtg = 1,
295 .brty = 4,
296 },
297 .len = 2,
298 },
299 [PN533_POLL_MOD_847KBPS_B] = {
300 .data = {
301 .maxtg = 1,
302 .brty = 8,
303 .initiator_data.type_b = {
304 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
305 .polling_method =
306 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
307 },
308 },
309 .len = 3,
310 },
6fbbdc16
SO		 311 [PN533_LISTEN_MOD] = {
312 .len = 0,
313 },
c46ee386
AAJ		 314};
315
316/* PN533_CMD_IN_ATR */
317
c46ee386
AAJ		 318struct pn533_cmd_activate_response {
319 u8 status;
320 u8 nfcid3t[10];
321 u8 didt;
322 u8 bst;
323 u8 brt;
324 u8 to;
325 u8 ppt;
326 /* optional */
327 u8 gt[];
328} __packed;
329
361f3cb7
SO		 330struct pn533_cmd_jump_dep_response {
331 u8 status;
332 u8 tg;
333 u8 nfcid3t[10];
334 u8 didt;
335 u8 bst;
336 u8 brt;
337 u8 to;
338 u8 ppt;
339 /* optional */
340 u8 gt[];
341} __packed;
c46ee386 342
ad3823ce
SO		 343
344/* PN533_TG_INIT_AS_TARGET */
345#define PN533_INIT_TARGET_PASSIVE 0x1
346#define PN533_INIT_TARGET_DEP 0x2
347
fc40a8c1
SO		 348#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
349#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
350#define PN533_INIT_TARGET_RESP_DEP 0x4
351
58520373
WR		 352enum pn533_protocol_type {
353 PN533_PROTO_REQ_ACK_RESP = 0,
354 PN533_PROTO_REQ_RESP
355};
356
c46ee386
AAJ		 357struct pn533 {
358 struct usb_device *udev;
359 struct usb_interface *interface;
360 struct nfc_dev *nfc_dev;
d5590bba 361 u32 device_type;
58520373 362 enum pn533_protocol_type protocol_type;
c46ee386
AAJ		 363
364 struct urb *out_urb;
c46ee386 365 struct urb *in_urb;
c46ee386 366
6ff73fd2 367 struct sk_buff_head resp_q;
963a82e0 368 struct sk_buff_head fragment_skb;
6ff73fd2 369
4849f85e
SO		 370 struct workqueue_struct *wq;
371 struct work_struct cmd_work;
5d50b364 372 struct work_struct cmd_complete_work;
46f793b0 373 struct delayed_work poll_work;
963a82e0
OG		 374 struct work_struct mi_rx_work;
375 struct work_struct mi_tx_work;
103b34cf 376 struct work_struct tg_work;
17e9d9d4 377 struct work_struct rf_work;
d5590bba
WR		 378
379 struct list_head cmd_queue;
380 struct pn533_cmd *cmd;
381 u8 cmd_pending;
d5590bba 382 struct mutex cmd_lock; /* protects cmd queue */
c46ee386 383
b1e666f5 384 void *cmd_complete_mi_arg;
963a82e0 385 void *cmd_complete_dep_arg;
c46ee386
AAJ		 386
387 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
388 u8 poll_mod_count;
389 u8 poll_mod_curr;
390 u32 poll_protocols;
6fbbdc16 391 u32 listen_protocols;
d5590bba
WR		 392 struct timer_list listen_timer;
393 int cancel_listen;
6fbbdc16
SO		 394
395 u8 *gb;
396 size_t gb_len;
c46ee386
AAJ		 397
398 u8 tgt_available_prots;
399 u8 tgt_active_prot;
51ad304c 400 u8 tgt_mode;
5c7b0531 401
9e2d493e 402 struct pn533_frame_ops *ops;
5d50b364
SO		 403};
404
405struct pn533_cmd {
406 struct list_head queue;
4b2a9532 407 u8 code;
f87bc9fb 408 int status;
aada17ac
WR		 409 struct sk_buff *req;
410 struct sk_buff *resp;
9e2d493e 411 int resp_len;
4231604b
WR		 412 pn533_send_async_complete_t complete_cb;
413 void *complete_cb_context;
c46ee386
AAJ		 414};
415
63123108 416struct pn533_std_frame {
c46ee386
AAJ		 417 u8 preamble;
418 __be16 start_frame;
419 u8 datalen;
420 u8 datalen_checksum;
421 u8 data[];
422} __packed;
423
1575b9d8
OG		 424struct pn533_ext_frame { /* Extended Information frame */
425 u8 preamble;
426 __be16 start_frame;
427 __be16 eif_flag; /* fixed to 0xFFFF */
428 __be16 datalen;
429 u8 datalen_checksum;
430 u8 data[];
431} __packed;
432
9e2d493e
WR		 433struct pn533_frame_ops {
434 void (*tx_frame_init)(void *frame, u8 cmd_code);
435 void (*tx_frame_finish)(void *frame);
436 void (*tx_update_payload_len)(void *frame, int len);
437 int tx_header_len;
438 int tx_tail_len;
439
56a63c82 440 bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
9e2d493e
WR		 441 int (*rx_frame_size)(void *frame);
442 int rx_header_len;
443 int rx_tail_len;
444
445 int max_payload_len;
446 u8 (*get_cmd_code)(void *frame);
447};
448
53cf4839
WR		 449struct pn533_acr122_ccid_hdr {
450 u8 type;
451 u32 datalen;
452 u8 slot;
453 u8 seq;
454 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
455 byte for reposnse msg */
456 u8 data[]; /* payload */
457} __packed;
458
459struct pn533_acr122_apdu_hdr {
460 u8 class;
461 u8 ins;
462 u8 p1;
463 u8 p2;
464} __packed;
465
466struct pn533_acr122_tx_frame {
467 struct pn533_acr122_ccid_hdr ccid;
468 struct pn533_acr122_apdu_hdr apdu;
469 u8 datalen;
470 u8 data[]; /* pn533 frame: TFI ... */
471} __packed;
472
473struct pn533_acr122_rx_frame {
474 struct pn533_acr122_ccid_hdr ccid;
475 u8 data[]; /* pn533 frame : TFI ... */
476} __packed;
477
478static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
479{
480 struct pn533_acr122_tx_frame *frame = _frame;
481
482 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
483 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
484 sizeof(datalen) */
485 frame->ccid.slot = 0;
486 frame->ccid.seq = 0;
487 frame->ccid.params[0] = 0;
488 frame->ccid.params[1] = 0;
489 frame->ccid.params[2] = 0;
490
491 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
492 frame->data[1] = cmd_code;
493 frame->datalen = 2; /* data[0] + data[1] */
494
495 frame->apdu.class = 0xFF;
496 frame->apdu.ins = 0;
497 frame->apdu.p1 = 0;
498 frame->apdu.p2 = 0;
499}
500
501static void pn533_acr122_tx_frame_finish(void *_frame)
502{
503 struct pn533_acr122_tx_frame *frame = _frame;
504
505 frame->ccid.datalen += frame->datalen;
506}
507
508static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
509{
510 struct pn533_acr122_tx_frame *frame = _frame;
511
512 frame->datalen += len;
513}
514
56a63c82 515static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
53cf4839
WR		 516{
517 struct pn533_acr122_rx_frame *frame = _frame;
518
519 if (frame->ccid.type != 0x83)
520 return false;
521
522 if (frame->data[frame->ccid.datalen - 2] == 0x63)
523 return false;
524
525 return true;
526}
527
528static int pn533_acr122_rx_frame_size(void *frame)
529{
530 struct pn533_acr122_rx_frame *f = frame;
531
532 /* f->ccid.datalen already includes tail length */
533 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
534}
535
536static u8 pn533_acr122_get_cmd_code(void *frame)
537{
538 struct pn533_acr122_rx_frame *f = frame;
539
1575b9d8 540 return PN533_FRAME_CMD(f);
53cf4839
WR		 541}
542
543static struct pn533_frame_ops pn533_acr122_frame_ops = {
544 .tx_frame_init = pn533_acr122_tx_frame_init,
545 .tx_frame_finish = pn533_acr122_tx_frame_finish,
546 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
547 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
548 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
549
550 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
551 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
552 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
553 .rx_frame_size = pn533_acr122_rx_frame_size,
554
555 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
556 .get_cmd_code = pn533_acr122_get_cmd_code,
557};
558
1575b9d8
OG		 559/* The rule: value(high byte) + value(low byte) + checksum = 0 */
560static inline u8 pn533_ext_checksum(u16 value)
561{
562 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
563}
564
c46ee386 565/* The rule: value + checksum = 0 */
63123108 566static inline u8 pn533_std_checksum(u8 value)
c46ee386
AAJ		 567{
568 return ~value + 1;
569}
570
571/* The rule: sum(data elements) + checksum = 0 */
63123108 572static u8 pn533_std_data_checksum(u8 *data, int datalen)
c46ee386
AAJ		 573{
574 u8 sum = 0;
575 int i;
576
577 for (i = 0; i < datalen; i++)
578 sum += data[i];
579
63123108 580 return pn533_std_checksum(sum);
c46ee386
AAJ		 581}
582
63123108 583static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
c46ee386 584{
63123108 585 struct pn533_std_frame *frame = _frame;
9e2d493e 586
c46ee386 587 frame->preamble = 0;
63123108
WR		 588 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
589 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
1575b9d8 590 PN533_FRAME_CMD(frame) = cmd_code;
c46ee386
AAJ		 591 frame->datalen = 2;
592}
593
63123108 594static void pn533_std_tx_frame_finish(void *_frame)
c46ee386 595{
63123108 596 struct pn533_std_frame *frame = _frame;
9e2d493e 597
63123108 598 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
c46ee386 599
63123108
WR		 600 PN533_STD_FRAME_CHECKSUM(frame) =
601 pn533_std_data_checksum(frame->data, frame->datalen);
c46ee386 602
63123108 603 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
c46ee386
AAJ		 604}
605
63123108 606static void pn533_std_tx_update_payload_len(void *_frame, int len)
9e2d493e 607{
63123108 608 struct pn533_std_frame *frame = _frame;
9e2d493e
WR		 609
610 frame->datalen += len;
611}
612
56a63c82 613static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
c46ee386
AAJ		 614{
615 u8 checksum;
1575b9d8 616 struct pn533_std_frame *stdf = _frame;
c46ee386 617
1575b9d8 618 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 619 return false;
620
1575b9d8
OG		 621 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
622 /* Standard frame code */
56a63c82 623 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
1575b9d8
OG		 624
625 checksum = pn533_std_checksum(stdf->datalen);
626 if (checksum != stdf->datalen_checksum)
627 return false;
628
629 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
630 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
631 return false;
632 } else {
633 /* Extended */
634 struct pn533_ext_frame *eif = _frame;
635
56a63c82
OG		 636 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
637
1575b9d8
OG		 638 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
639 if (checksum != eif->datalen_checksum)
640 return false;
641
642 /* check data checksum */
643 checksum = pn533_std_data_checksum(eif->data,
644 be16_to_cpu(eif->datalen));
645 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
646 return false;
647 }
c46ee386
AAJ		 648
649 return true;
650}
651
63123108 652static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
c46ee386 653{
63123108 654 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
c46ee386
AAJ		 655 return false;
656
657 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
658 return false;
659
660 return true;
661}
662
63123108 663static inline int pn533_std_rx_frame_size(void *frame)
9e2d493e 664{
63123108 665 struct pn533_std_frame *f = frame;
9e2d493e 666
1575b9d8
OG		 667 /* check for Extended Information frame */
668 if (PN533_STD_IS_EXTENDED(f)) {
669 struct pn533_ext_frame *eif = frame;
670
671 return sizeof(struct pn533_ext_frame)
672 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
673 }
674
63123108
WR		 675 return sizeof(struct pn533_std_frame) + f->datalen +
676 PN533_STD_FRAME_TAIL_LEN;
9e2d493e
WR		 677}
678
63123108 679static u8 pn533_std_get_cmd_code(void *frame)
9e2d493e 680{
63123108 681 struct pn533_std_frame *f = frame;
1575b9d8 682 struct pn533_ext_frame *eif = frame;
9e2d493e 683
1575b9d8
OG		 684 if (PN533_STD_IS_EXTENDED(f))
685 return PN533_FRAME_CMD(eif);
686 else
687 return PN533_FRAME_CMD(f);
9e2d493e
WR		 688}
689
ef3d56e1 690static struct pn533_frame_ops pn533_std_frame_ops = {
63123108
WR		 691 .tx_frame_init = pn533_std_tx_frame_init,
692 .tx_frame_finish = pn533_std_tx_frame_finish,
693 .tx_update_payload_len = pn533_std_tx_update_payload_len,
694 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
695 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
696
697 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
698 .rx_frame_size = pn533_std_rx_frame_size,
699 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
700 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
701
702 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
703 .get_cmd_code = pn533_std_get_cmd_code,
9e2d493e
WR		 704};
705
706static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
c46ee386 707{
2c206fb7 708 return (dev->ops->get_cmd_code(frame) ==
4b2a9532 709 PN533_CMD_RESPONSE(dev->cmd->code));
c46ee386
AAJ		 710}
711
c46ee386
AAJ		 712static void pn533_recv_response(struct urb *urb)
713{
714 struct pn533 *dev = urb->context;
f87bc9fb 715 struct pn533_cmd *cmd = dev->cmd;
9e2d493e 716 u8 *in_frame;
c46ee386 717
f87bc9fb
WR		 718 cmd->status = urb->status;
719
c46ee386
AAJ		 720 switch (urb->status) {
721 case 0:
f8f99171 722 break; /* success */
c46ee386
AAJ		 723 case -ECONNRESET:
724 case -ENOENT:
b4834839
JP		 725 dev_dbg(&dev->interface->dev,
726 "The urb has been canceled (status %d)\n",
727 urb->status);
4849f85e 728 goto sched_wq;
f8f99171 729 case -ESHUTDOWN:
c46ee386 730 default:
6ca55372 731 nfc_dev_err(&dev->interface->dev,
f8f99171 732 "Urb failure (status %d)", urb->status);
4849f85e 733 goto sched_wq;
c46ee386
AAJ		 734 }
735
736 in_frame = dev->in_urb->transfer_buffer;
737
b4834839 738 dev_dbg(&dev->interface->dev, "Received a frame\n");
e279f84f
SO		 739 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
740 dev->ops->rx_frame_size(in_frame), false);
99e591be 741
56a63c82 742 if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
c46ee386 743 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
f87bc9fb 744 cmd->status = -EIO;
4849f85e 745 goto sched_wq;
c46ee386
AAJ		 746 }
747
9e2d493e 748 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
6ca55372
WR		 749 nfc_dev_err(&dev->interface->dev,
750 "It it not the response to the last command");
f87bc9fb 751 cmd->status = -EIO;
4849f85e 752 goto sched_wq;
c46ee386
AAJ		 753 }
754
4849f85e 755sched_wq:
5d50b364 756 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 757}
758
759static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
760{
761 dev->in_urb->complete = pn533_recv_response;
762
763 return usb_submit_urb(dev->in_urb, flags);
764}
765
766static void pn533_recv_ack(struct urb *urb)
767{
768 struct pn533 *dev = urb->context;
f87bc9fb 769 struct pn533_cmd *cmd = dev->cmd;
63123108 770 struct pn533_std_frame *in_frame;
c46ee386
AAJ		 771 int rc;
772
f87bc9fb
WR		 773 cmd->status = urb->status;
774
c46ee386
AAJ		 775 switch (urb->status) {
776 case 0:
f8f99171 777 break; /* success */
c46ee386
AAJ		 778 case -ECONNRESET:
779 case -ENOENT:
b4834839
JP		 780 dev_dbg(&dev->interface->dev,
781 "The urb has been stopped (status %d)\n",
782 urb->status);
4849f85e 783 goto sched_wq;
f8f99171 784 case -ESHUTDOWN:
c46ee386 785 default:
6ca55372 786 nfc_dev_err(&dev->interface->dev,
f8f99171 787 "Urb failure (status %d)", urb->status);
4849f85e 788 goto sched_wq;
c46ee386
AAJ		 789 }
790
791 in_frame = dev->in_urb->transfer_buffer;
792
63123108 793 if (!pn533_std_rx_frame_is_ack(in_frame)) {
c46ee386 794 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
f87bc9fb 795 cmd->status = -EIO;
4849f85e 796 goto sched_wq;
c46ee386
AAJ		 797 }
798
c46ee386
AAJ		 799 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
800 if (rc) {
6ca55372
WR		 801 nfc_dev_err(&dev->interface->dev,
802 "usb_submit_urb failed with result %d", rc);
f87bc9fb 803 cmd->status = rc;
4849f85e 804 goto sched_wq;
c46ee386
AAJ		 805 }
806
807 return;
808
4849f85e 809sched_wq:
5d50b364 810 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 811}
812
813static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
814{
815 dev->in_urb->complete = pn533_recv_ack;
816
817 return usb_submit_urb(dev->in_urb, flags);
818}
819
820static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
821{
63123108 822 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
5b5a4437 823 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
c46ee386
AAJ		 824 int rc;
825
5b5a4437
WR		 826 dev->out_urb->transfer_buffer = ack;
827 dev->out_urb->transfer_buffer_length = sizeof(ack);
c46ee386
AAJ		 828 rc = usb_submit_urb(dev->out_urb, flags);
829
830 return rc;
831}
832
e8f40531
WR		 833static int __pn533_send_frame_async(struct pn533 *dev,
834 struct sk_buff *out,
835 struct sk_buff *in,
ddf19d20 836 int in_len)
c46ee386
AAJ		 837{
838 int rc;
839
e8f40531
WR		 840 dev->out_urb->transfer_buffer = out->data;
841 dev->out_urb->transfer_buffer_length = out->len;
c46ee386 842
e8f40531
WR		 843 dev->in_urb->transfer_buffer = in->data;
844 dev->in_urb->transfer_buffer_length = in_len;
c46ee386 845
e279f84f
SO		 846 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
847 out->data, out->len, false);
99e591be 848
d94ea4f5 849 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 850 if (rc)
851 return rc;
852
58520373
WR		 853 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
854 /* request for response for sent packet directly */
855 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
856 if (rc)
857 goto error;
858 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
859 /* request for ACK if that's the case */
860 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
861 if (rc)
862 goto error;
863 }
c46ee386
AAJ		 864
865 return 0;
866
867error:
868 usb_unlink_urb(dev->out_urb);
869 return rc;
870}
871
9e2d493e
WR		 872static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
873 struct sk_buff *skb)
aada17ac 874{
aada17ac
WR		 875 /* payload is already there, just update datalen */
876 int payload_len = skb->len;
9e2d493e 877 struct pn533_frame_ops *ops = dev->ops;
aada17ac 878
aada17ac 879
9e2d493e
WR		 880 skb_push(skb, ops->tx_header_len);
881 skb_put(skb, ops->tx_tail_len);
aada17ac 882
9e2d493e
WR		 883 ops->tx_frame_init(skb->data, cmd_code);
884 ops->tx_update_payload_len(skb->data, payload_len);
885 ops->tx_frame_finish(skb->data);
aada17ac
WR		 886}
887
ddf19d20 888static int pn533_send_async_complete(struct pn533 *dev)
aada17ac 889{
ddf19d20 890 struct pn533_cmd *cmd = dev->cmd;
f87bc9fb 891 int status = cmd->status;
aada17ac 892
4231604b
WR		 893 struct sk_buff *req = cmd->req;
894 struct sk_buff *resp = cmd->resp;
aada17ac 895
aada17ac
WR		 896 int rc;
897
898 dev_kfree_skb(req);
899
0c33d262 900 if (status < 0) {
4231604b
WR		 901 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
902 ERR_PTR(status));
aada17ac 903 dev_kfree_skb(resp);
2c206fb7 904 goto done;
aada17ac
WR		 905 }
906
9e2d493e
WR		 907 skb_put(resp, dev->ops->rx_frame_size(resp->data));
908 skb_pull(resp, dev->ops->rx_header_len);
909 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
aada17ac 910
4231604b 911 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
aada17ac 912
2c206fb7 913done:
4231604b 914 kfree(cmd);
2c206fb7 915 dev->cmd = NULL;
aada17ac
WR		 916 return rc;
917}
918
919static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
920 struct sk_buff *req, struct sk_buff *resp,
921 int resp_len,
922 pn533_send_async_complete_t complete_cb,
923 void *complete_cb_context)
924{
925 struct pn533_cmd *cmd;
aada17ac
WR		 926 int rc = 0;
927
b4834839 928 dev_dbg(&dev->interface->dev, "Sending command 0x%x\n", cmd_code);
aada17ac 929
4231604b
WR		 930 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
931 if (!cmd)
aada17ac
WR		 932 return -ENOMEM;
933
4b2a9532 934 cmd->code = cmd_code;
4231604b
WR		 935 cmd->req = req;
936 cmd->resp = resp;
937 cmd->resp_len = resp_len;
938 cmd->complete_cb = complete_cb;
939 cmd->complete_cb_context = complete_cb_context;
aada17ac 940
9e2d493e 941 pn533_build_cmd_frame(dev, cmd_code, req);
aada17ac
WR		 942
943 mutex_lock(&dev->cmd_lock);
944
945 if (!dev->cmd_pending) {
ddf19d20 946 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
aada17ac
WR		 947 if (rc)
948 goto error;
949
950 dev->cmd_pending = 1;
2c206fb7 951 dev->cmd = cmd;
aada17ac
WR		 952 goto unlock;
953 }
954
b4834839
JP		 955 dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x\n",
956 __func__, cmd_code);
aada17ac 957
aada17ac 958 INIT_LIST_HEAD(&cmd->queue);
aada17ac
WR		 959 list_add_tail(&cmd->queue, &dev->cmd_queue);
960
961 goto unlock;
962
963error:
4231604b 964 kfree(cmd);
aada17ac
WR		 965unlock:
966 mutex_unlock(&dev->cmd_lock);
967 return rc;
15461aeb
WR		 968}
969
970static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
971 struct sk_buff *req,
972 pn533_send_async_complete_t complete_cb,
973 void *complete_cb_context)
974{
975 struct sk_buff *resp;
976 int rc;
9e2d493e
WR		 977 int resp_len = dev->ops->rx_header_len +
978 dev->ops->max_payload_len +
979 dev->ops->rx_tail_len;
15461aeb 980
15461aeb
WR		 981 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
982 if (!resp)
983 return -ENOMEM;
984
985 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
986 complete_cb_context);
987 if (rc)
988 dev_kfree_skb(resp);
989
990 return rc;
aada17ac
WR		 991}
992
993static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
994 struct sk_buff *req,
995 pn533_send_async_complete_t complete_cb,
996 void *complete_cb_context)
997{
998 struct sk_buff *resp;
999 int rc;
9e2d493e
WR		 1000 int resp_len = dev->ops->rx_header_len +
1001 dev->ops->max_payload_len +
1002 dev->ops->rx_tail_len;
aada17ac 1003
9e2d493e 1004 resp = alloc_skb(resp_len, GFP_KERNEL);
aada17ac
WR		 1005 if (!resp)
1006 return -ENOMEM;
1007
9e2d493e
WR		 1008 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
1009 complete_cb_context);
aada17ac
WR		 1010 if (rc)
1011 dev_kfree_skb(resp);
1012
1013 return rc;
1014}
1015
b1e666f5
WR		 1016/*
1017 * pn533_send_cmd_direct_async
1018 *
1019 * The function sends a piority cmd directly to the chip omiting the cmd
1020 * queue. It's intended to be used by chaining mechanism of received responses
1021 * where the host has to request every single chunk of data before scheduling
1022 * next cmd from the queue.
1023 */
1024static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
1025 struct sk_buff *req,
1026 pn533_send_async_complete_t complete_cb,
1027 void *complete_cb_context)
1028{
b1e666f5 1029 struct sk_buff *resp;
4231604b 1030 struct pn533_cmd *cmd;
b1e666f5 1031 int rc;
9e2d493e
WR		 1032 int resp_len = dev->ops->rx_header_len +
1033 dev->ops->max_payload_len +
1034 dev->ops->rx_tail_len;
b1e666f5 1035
b1e666f5
WR		 1036 resp = alloc_skb(resp_len, GFP_KERNEL);
1037 if (!resp)
1038 return -ENOMEM;
1039
4231604b
WR		 1040 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1041 if (!cmd) {
b1e666f5
WR		 1042 dev_kfree_skb(resp);
1043 return -ENOMEM;
1044 }
1045
4b2a9532 1046 cmd->code = cmd_code;
4231604b
WR		 1047 cmd->req = req;
1048 cmd->resp = resp;
1049 cmd->resp_len = resp_len;
1050 cmd->complete_cb = complete_cb;
1051 cmd->complete_cb_context = complete_cb_context;
b1e666f5 1052
9e2d493e 1053 pn533_build_cmd_frame(dev, cmd_code, req);
b1e666f5 1054
ddf19d20 1055 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
b1e666f5
WR		 1056 if (rc < 0) {
1057 dev_kfree_skb(resp);
4231604b 1058 kfree(cmd);
2c206fb7
WR		 1059 } else {
1060 dev->cmd = cmd;
b1e666f5
WR		 1061 }
1062
1063 return rc;
1064}
1065
c79490e1
WR		 1066static void pn533_wq_cmd_complete(struct work_struct *work)
1067{
1068 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1069 int rc;
1070
1071 rc = pn533_send_async_complete(dev);
1072 if (rc != -EINPROGRESS)
1073 queue_work(dev->wq, &dev->cmd_work);
1074}
1075
5d50b364
SO		 1076static void pn533_wq_cmd(struct work_struct *work)
1077{
1078 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1079 struct pn533_cmd *cmd;
0ce1fbdd 1080 int rc;
5d50b364
SO		 1081
1082 mutex_lock(&dev->cmd_lock);
1083
1084 if (list_empty(&dev->cmd_queue)) {
1085 dev->cmd_pending = 0;
1086 mutex_unlock(&dev->cmd_lock);
1087 return;
1088 }
1089
1090 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1091
60ad07ab
SJ		 1092 list_del(&cmd->queue);
1093
5d50b364
SO		 1094 mutex_unlock(&dev->cmd_lock);
1095
ddf19d20 1096 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
0ce1fbdd
WR		 1097 if (rc < 0) {
1098 dev_kfree_skb(cmd->req);
1099 dev_kfree_skb(cmd->resp);
4231604b 1100 kfree(cmd);
2c206fb7 1101 return;
0ce1fbdd 1102 }
2c206fb7
WR		 1103
1104 dev->cmd = cmd;
5d50b364
SO		 1105}
1106
c46ee386 1107struct pn533_sync_cmd_response {
94c5c156 1108 struct sk_buff *resp;
c46ee386
AAJ		 1109 struct completion done;
1110};
1111
94c5c156
WR		 1112static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1113 struct sk_buff *resp)
1114{
1115 struct pn533_sync_cmd_response *arg = _arg;
1116
94c5c156
WR		 1117 arg->resp = resp;
1118 complete(&arg->done);
1119
1120 return 0;
1121}
1122
1123/* pn533_send_cmd_sync
1124 *
1125 * Please note the req parameter is freed inside the function to
1126 * limit a number of return value interpretations by the caller.
1127 *
1128 * 1. negative in case of error during TX path -> req should be freed
1129 *
1130 * 2. negative in case of error during RX path -> req should not be freed
1131 * as it's been already freed at the begining of RX path by
1132 * async_complete_cb.
1133 *
1134 * 3. valid pointer in case of succesfult RX path
1135 *
1136 * A caller has to check a return value with IS_ERR macro. If the test pass,
1137 * the returned pointer is valid.
1138 *
1139 * */
1140static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1141 struct sk_buff *req)
1142{
1143 int rc;
1144 struct pn533_sync_cmd_response arg;
1145
94c5c156
WR		 1146 init_completion(&arg.done);
1147
1148 rc = pn533_send_cmd_async(dev, cmd_code, req,
1149 pn533_send_sync_complete, &arg);
1150 if (rc) {
1151 dev_kfree_skb(req);
1152 return ERR_PTR(rc);
1153 }
1154
1155 wait_for_completion(&arg.done);
1156
1157 return arg.resp;
1158}
1159
c46ee386
AAJ		 1160static void pn533_send_complete(struct urb *urb)
1161{
1162 struct pn533 *dev = urb->context;
1163
c46ee386
AAJ		 1164 switch (urb->status) {
1165 case 0:
f8f99171 1166 break; /* success */
c46ee386
AAJ		 1167 case -ECONNRESET:
1168 case -ENOENT:
b4834839
JP		 1169 dev_dbg(&dev->interface->dev,
1170 "The urb has been stopped (status %d)\n",
1171 urb->status);
c46ee386 1172 break;
f8f99171 1173 case -ESHUTDOWN:
c46ee386 1174 default:
f8f99171
WR		 1175 nfc_dev_err(&dev->interface->dev,
1176 "Urb failure (status %d)", urb->status);
c46ee386
AAJ		 1177 }
1178}
1179
10cff29a
WR		 1180static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1181{
1182 /* ACR122U does not support any command which aborts last
1183 * issued command i.e. as ACK for standard PN533. Additionally,
1184 * it behaves stange, sending broken or incorrect responses,
1185 * when we cancel urb before the chip will send response.
1186 */
1187 if (dev->device_type == PN533_DEVICE_ACR122U)
1188 return;
1189
1190 /* An ack will cancel the last issued command */
1191 pn533_send_ack(dev, flags);
1192
1193 /* cancel the urb request */
1194 usb_kill_urb(dev->in_urb);
1195}
1196
9e2d493e 1197static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
d22b2db6
WR		 1198{
1199 struct sk_buff *skb;
1200
9e2d493e 1201 skb = alloc_skb(dev->ops->tx_header_len +
d22b2db6 1202 size +
9e2d493e 1203 dev->ops->tx_tail_len, GFP_KERNEL);
d22b2db6
WR		 1204
1205 if (skb)
9e2d493e 1206 skb_reserve(skb, dev->ops->tx_header_len);
d22b2db6
WR		 1207
1208 return skb;
1209}
1210
c46ee386
AAJ		 1211struct pn533_target_type_a {
1212 __be16 sens_res;
1213 u8 sel_res;
1214 u8 nfcid_len;
1215 u8 nfcid_data[];
1216} __packed;
1217
1218
1219#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1220#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1221#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1222
1223#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1224#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1225
1226#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1227#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1228
1229#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1230#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1231#define PN533_TYPE_A_SEL_PROT_DEP 2
1232#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1233
1234static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1235 int target_data_len)
1236{
1237 u8 ssd;
1238 u8 platconf;
1239
1240 if (target_data_len < sizeof(struct pn533_target_type_a))
1241 return false;
1242
1243 /* The lenght check of nfcid[] and ats[] are not being performed because
1244 the values are not being used */
1245
1246 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1247 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1248 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1249
1250 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1251 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1252 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1253 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1254 return false;
1255
1256 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1257 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1258 return false;
1259
1260 return true;
1261}
1262
1263static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1264 int tgt_data_len)
1265{
1266 struct pn533_target_type_a *tgt_type_a;
1267
37cf4fc6 1268 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
c46ee386
AAJ		 1269
1270 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1271 return -EPROTO;
1272
1273 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1274 case PN533_TYPE_A_SEL_PROT_MIFARE:
1275 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1276 break;
1277 case PN533_TYPE_A_SEL_PROT_ISO14443:
1278 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1279 break;
1280 case PN533_TYPE_A_SEL_PROT_DEP:
1281 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1282 break;
1283 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1284 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1285 NFC_PROTO_NFC_DEP_MASK;
1286 break;
1287 }
1288
1289 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1290 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1291 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1292 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1293
1294 return 0;
1295}
1296
1297struct pn533_target_felica {
1298 u8 pol_res;
1299 u8 opcode;
322bce95 1300 u8 nfcid2[NFC_NFCID2_MAXSIZE];
c46ee386
AAJ		 1301 u8 pad[8];
1302 /* optional */
1303 u8 syst_code[];
1304} __packed;
1305
1306#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1307#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1308
1309static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1310 int target_data_len)
1311{
1312 if (target_data_len < sizeof(struct pn533_target_felica))
1313 return false;
1314
1315 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1316 return false;
1317
1318 return true;
1319}
1320
1321static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1322 int tgt_data_len)
1323{
1324 struct pn533_target_felica *tgt_felica;
1325
37cf4fc6 1326 tgt_felica = (struct pn533_target_felica *)tgt_data;
c46ee386
AAJ		 1327
1328 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1329 return -EPROTO;
1330
5d467742
WR		 1331 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1332 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
c46ee386
AAJ		 1333 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1334 else
1335 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1336
7975754f
SO		 1337 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1338 nfc_tgt->sensf_res_len = 9;
1339
322bce95
SO		 1340 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1341 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1342
c46ee386
AAJ		 1343 return 0;
1344}
1345
1346struct pn533_target_jewel {
1347 __be16 sens_res;
1348 u8 jewelid[4];
1349} __packed;
1350
1351static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1352 int target_data_len)
1353{
1354 u8 ssd;
1355 u8 platconf;
1356
1357 if (target_data_len < sizeof(struct pn533_target_jewel))
1358 return false;
1359
1360 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1361 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1362 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1363
1364 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
5d467742
WR		 1365 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1366 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1367 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
c46ee386
AAJ		 1368 return false;
1369
1370 return true;
1371}
1372
1373static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1374 int tgt_data_len)
1375{
1376 struct pn533_target_jewel *tgt_jewel;
1377
37cf4fc6 1378 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
c46ee386
AAJ		 1379
1380 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1381 return -EPROTO;
1382
1383 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1384 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1385 nfc_tgt->nfcid1_len = 4;
1386 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1387
1388 return 0;
1389}
1390
1391struct pn533_type_b_prot_info {
1392 u8 bitrate;
1393 u8 fsci_type;
1394 u8 fwi_adc_fo;
1395} __packed;
1396
1397#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1398#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1399#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1400
1401struct pn533_type_b_sens_res {
1402 u8 opcode;
1403 u8 nfcid[4];
1404 u8 appdata[4];
1405 struct pn533_type_b_prot_info prot_info;
1406} __packed;
1407
1408#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1409
1410struct pn533_target_type_b {
1411 struct pn533_type_b_sens_res sensb_res;
1412 u8 attrib_res_len;
1413 u8 attrib_res[];
1414} __packed;
1415
1416static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1417 int target_data_len)
1418{
1419 if (target_data_len < sizeof(struct pn533_target_type_b))
1420 return false;
1421
1422 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1423 return false;
1424
1425 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1426 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1427 return false;
1428
1429 return true;
1430}
1431
1432static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1433 int tgt_data_len)
1434{
1435 struct pn533_target_type_b *tgt_type_b;
1436
37cf4fc6 1437 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
c46ee386
AAJ		 1438
1439 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1440 return -EPROTO;
1441
01d719a2 1442 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1443
1444 return 0;
1445}
1446
b5193e5d
WR		 1447static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1448 int tgdata_len)
c46ee386 1449{
c46ee386
AAJ		 1450 struct nfc_target nfc_tgt;
1451 int rc;
1452
b4834839
JP		 1453 dev_dbg(&dev->interface->dev, "%s - modulation=%d\n",
1454 __func__, dev->poll_mod_curr);
c46ee386 1455
b5193e5d 1456 if (tg != 1)
c46ee386
AAJ		 1457 return -EPROTO;
1458
98b3ac1b
SO		 1459 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1460
c46ee386
AAJ		 1461 switch (dev->poll_mod_curr) {
1462 case PN533_POLL_MOD_106KBPS_A:
b5193e5d 1463 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1464 break;
1465 case PN533_POLL_MOD_212KBPS_FELICA:
1466 case PN533_POLL_MOD_424KBPS_FELICA:
b5193e5d 1467 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1468 break;
1469 case PN533_POLL_MOD_106KBPS_JEWEL:
b5193e5d 1470 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1471 break;
1472 case PN533_POLL_MOD_847KBPS_B:
b5193e5d 1473 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
c46ee386
AAJ		 1474 break;
1475 default:
b5193e5d
WR		 1476 nfc_dev_err(&dev->interface->dev,
1477 "Unknown current poll modulation");
c46ee386
AAJ		 1478 return -EPROTO;
1479 }
1480
1481 if (rc)
1482 return rc;
1483
1484 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
b4834839
JP		 1485 dev_dbg(&dev->interface->dev,
1486 "The Tg found doesn't have the desired protocol\n");
c46ee386
AAJ		 1487 return -EAGAIN;
1488 }
1489
b4834839
JP		 1490 dev_dbg(&dev->interface->dev,
1491 "Target found - supported protocols: 0x%x\n",
1492 nfc_tgt.supported_protocols);
c46ee386
AAJ		 1493
1494 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1495
1496 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1497
1498 return 0;
1499}
1500
6fbbdc16
SO		 1501static inline void pn533_poll_next_mod(struct pn533 *dev)
1502{
1503 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1504}
1505
c46ee386
AAJ		 1506static void pn533_poll_reset_mod_list(struct pn533 *dev)
1507{
1508 dev->poll_mod_count = 0;
1509}
1510
1511static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1512{
1513 dev->poll_mod_active[dev->poll_mod_count] =
37cf4fc6 1514 (struct pn533_poll_modulations *)&poll_mod[mod_index];
c46ee386
AAJ		 1515 dev->poll_mod_count++;
1516}
1517
6fbbdc16
SO		 1518static void pn533_poll_create_mod_list(struct pn533 *dev,
1519 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1520{
1521 pn533_poll_reset_mod_list(dev);
1522
b08e8603
WR		 1523 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1524 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1525 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
c46ee386
AAJ		 1526 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1527
b08e8603
WR		 1528 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1529 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1530 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1531 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1532 }
1533
6fbbdc16 1534 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1535 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1536
01d719a2 1537 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1538 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1539
6fbbdc16
SO		 1540 if (tm_protocols)
1541 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1542}
1543
b5193e5d 1544static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
c46ee386 1545{
b5193e5d
WR		 1546 u8 nbtg, tg, *tgdata;
1547 int rc, tgdata_len;
c46ee386 1548
b5193e5d
WR		 1549 nbtg = resp->data[0];
1550 tg = resp->data[1];
1551 tgdata = &resp->data[2];
1552 tgdata_len = resp->len - 2; /* nbtg + tg */
1553
1554 if (nbtg) {
1555 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
c46ee386
AAJ		 1556
1557 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1558 if (rc == 0) {
1559 pn533_poll_reset_mod_list(dev);
1560 return 0;
1561 }
c46ee386
AAJ		 1562 }
1563
6fbbdc16 1564 return -EAGAIN;
c46ee386
AAJ		 1565}
1566
9e2d493e 1567static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
ad3823ce 1568{
b5193e5d
WR		 1569 struct sk_buff *skb;
1570 u8 *felica, *nfcid3, *gb;
1571
9e2d493e
WR		 1572 u8 *gbytes = dev->gb;
1573 size_t gbytes_len = dev->gb_len;
1574
51d9e803
SO		 1575 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1576 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1577 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1578 0xff, 0xff}; /* System code */
b5193e5d 1579
51d9e803
SO		 1580 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1581 0x0, 0x0, 0x0,
1582 0x40}; /* SEL_RES for DEP */
ad3823ce 1583
b5193e5d
WR		 1584 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1585 felica (18), nfcid3 (10), gb_len (1) */
1586 gbytes_len +
1587 1; /* len Tk*/
ad3823ce 1588
9e2d493e 1589 skb = pn533_alloc_skb(dev, skb_len);
b5193e5d
WR		 1590 if (!skb)
1591 return NULL;
ad3823ce
SO		 1592
1593 /* DEP support only */
52f2eaee 1594 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
b5193e5d
WR		 1595
1596 /* MIFARE params */
1597 memcpy(skb_put(skb, 6), mifare_params, 6);
51d9e803
SO		 1598
1599 /* Felica params */
b5193e5d
WR		 1600 felica = skb_put(skb, 18);
1601 memcpy(felica, felica_params, 18);
1602 get_random_bytes(felica + 2, 6);
51d9e803
SO		 1603
1604 /* NFCID3 */
b5193e5d
WR		 1605 nfcid3 = skb_put(skb, 10);
1606 memset(nfcid3, 0, 10);
1607 memcpy(nfcid3, felica, 8);
51d9e803
SO		 1608
1609 /* General bytes */
b5193e5d 1610 *skb_put(skb, 1) = gbytes_len;
51d9e803 1611
b5193e5d
WR		 1612 gb = skb_put(skb, gbytes_len);
1613 memcpy(gb, gbytes, gbytes_len);
ad3823ce 1614
b5193e5d
WR		 1615 /* Len Tk */
1616 *skb_put(skb, 1) = 0;
51d9e803 1617
b5193e5d 1618 return skb;
ad3823ce
SO		 1619}
1620
b1bb290a 1621#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1622#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1623static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1624 struct sk_buff *resp)
103b34cf 1625{
e4878823 1626 u8 status;
103b34cf 1627
b4834839 1628 dev_dbg(&dev->interface->dev, "%s\n", __func__);
103b34cf 1629
e4878823
WR		 1630 if (IS_ERR(resp))
1631 return PTR_ERR(resp);
103b34cf 1632
e4878823
WR		 1633 status = resp->data[0];
1634 skb_pull(resp, sizeof(status));
103b34cf 1635
e4878823 1636 if (status != 0) {
103b34cf 1637 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1638 dev->tgt_mode = 0;
e4878823 1639 dev_kfree_skb(resp);
103b34cf
SO		 1640 return 0;
1641 }
1642
e4878823 1643 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1644}
1645
1646static void pn533_wq_tg_get_data(struct work_struct *work)
1647{
1648 struct pn533 *dev = container_of(work, struct pn533, tg_work);
e4878823
WR		 1649 struct sk_buff *skb;
1650 int rc;
103b34cf 1651
b4834839 1652 dev_dbg(&dev->interface->dev, "%s\n", __func__);
103b34cf 1653
9e2d493e 1654 skb = pn533_alloc_skb(dev, 0);
e4878823 1655 if (!skb)
103b34cf
SO		 1656 return;
1657
e4878823
WR		 1658 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1659 pn533_tm_get_data_complete, NULL);
103b34cf 1660
e4878823
WR		 1661 if (rc < 0)
1662 dev_kfree_skb(skb);
103b34cf
SO		 1663
1664 return;
1665}
1666
fc40a8c1 1667#define ATR_REQ_GB_OFFSET 17
b5193e5d 1668static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
fe7c5800 1669{
b5193e5d 1670 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
fc40a8c1 1671 size_t gb_len;
103b34cf 1672 int rc;
ad3823ce 1673
b4834839 1674 dev_dbg(&dev->interface->dev, "%s\n", __func__);
ad3823ce 1675
b5193e5d 1676 if (resp->len < ATR_REQ_GB_OFFSET + 1)
fc40a8c1
SO		 1677 return -EINVAL;
1678
b5193e5d
WR		 1679 mode = resp->data[0];
1680 cmd = &resp->data[1];
ad3823ce 1681
b4834839
JP		 1682 dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1683 mode, resp->len);
ad3823ce 1684
b5193e5d
WR		 1685 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1686 PN533_INIT_TARGET_RESP_ACTIVE)
fc40a8c1
SO		 1687 comm_mode = NFC_COMM_ACTIVE;
1688
b5193e5d 1689 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
fc40a8c1
SO		 1690 return -EOPNOTSUPP;
1691
b5193e5d
WR		 1692 gb = cmd + ATR_REQ_GB_OFFSET;
1693 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
fc40a8c1 1694
103b34cf
SO		 1695 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1696 comm_mode, gb, gb_len);
1697 if (rc < 0) {
1698 nfc_dev_err(&dev->interface->dev,
1699 "Error when signaling target activation");
1700 return rc;
1701 }
1702
51ad304c 1703 dev->tgt_mode = 1;
103b34cf
SO		 1704 queue_work(dev->wq, &dev->tg_work);
1705
1706 return 0;
fe7c5800
SO		 1707}
1708
6fbbdc16 1709static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1710{
37cf4fc6 1711 struct pn533 *dev = (struct pn533 *)data;
6fbbdc16 1712
b4834839 1713 dev_dbg(&dev->interface->dev, "Listen mode timeout\n");
6fbbdc16 1714
6fbbdc16
SO		 1715 dev->cancel_listen = 1;
1716
6fbbdc16
SO		 1717 pn533_poll_next_mod(dev);
1718
46f793b0
SO		 1719 queue_delayed_work(dev->wq, &dev->poll_work,
1720 msecs_to_jiffies(PN533_POLL_INTERVAL));
6fbbdc16
SO		 1721}
1722
17e9d9d4
SO		 1723static int pn533_rf_complete(struct pn533 *dev, void *arg,
1724 struct sk_buff *resp)
1725{
1726 int rc = 0;
1727
b4834839 1728 dev_dbg(&dev->interface->dev, "%s\n", __func__);
17e9d9d4
SO		 1729
1730 if (IS_ERR(resp)) {
1731 rc = PTR_ERR(resp);
1732
1733 nfc_dev_err(&dev->interface->dev, "%s RF setting error %d",
1734 __func__, rc);
1735
1736 return rc;
1737 }
1738
46f793b0
SO		 1739 queue_delayed_work(dev->wq, &dev->poll_work,
1740 msecs_to_jiffies(PN533_POLL_INTERVAL));
17e9d9d4
SO		 1741
1742 dev_kfree_skb(resp);
1743 return rc;
1744}
1745
1746static void pn533_wq_rf(struct work_struct *work)
1747{
1748 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1749 struct sk_buff *skb;
1750 int rc;
1751
b4834839 1752 dev_dbg(&dev->interface->dev, "%s\n", __func__);
17e9d9d4
SO		 1753
1754 skb = pn533_alloc_skb(dev, 2);
1755 if (!skb)
1756 return;
1757
1758 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
3a8eab39 1759 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
17e9d9d4
SO		 1760
1761 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1762 pn533_rf_complete, NULL);
1763 if (rc < 0) {
1764 dev_kfree_skb(skb);
1765 nfc_dev_err(&dev->interface->dev, "RF setting error %d", rc);
1766 }
1767
1768 return;
1769}
1770
6fbbdc16 1771static int pn533_poll_complete(struct pn533 *dev, void *arg,
b5193e5d 1772 struct sk_buff *resp)
6fbbdc16
SO		 1773{
1774 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1775 int rc;
1776
b4834839 1777 dev_dbg(&dev->interface->dev, "%s\n", __func__);
ad3823ce 1778
b5193e5d
WR		 1779 if (IS_ERR(resp)) {
1780 rc = PTR_ERR(resp);
1781
1782 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1783 __func__, rc);
1784
1785 if (rc == -ENOENT) {
1786 if (dev->poll_mod_count != 0)
1787 return rc;
1788 else
1789 goto stop_poll;
1790 } else if (rc < 0) {
1791 nfc_dev_err(&dev->interface->dev,
1792 "Error %d when running poll", rc);
1793 goto stop_poll;
1794 }
6fbbdc16 1795 }
ad3823ce 1796
6fbbdc16
SO		 1797 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1798
b5193e5d 1799 if (cur_mod->len == 0) { /* Target mode */
6fbbdc16 1800 del_timer(&dev->listen_timer);
b5193e5d
WR		 1801 rc = pn533_init_target_complete(dev, resp);
1802 goto done;
6fbbdc16
SO		 1803 }
1804
b5193e5d
WR		 1805 /* Initiator mode */
1806 rc = pn533_start_poll_complete(dev, resp);
1807 if (!rc)
1808 goto done;
6fbbdc16 1809
95cb9e10 1810 if (!dev->poll_mod_count) {
b4834839 1811 dev_dbg(&dev->interface->dev, "Polling has been stopped\n");
95cb9e10
WR		 1812 goto done;
1813 }
1814
b5193e5d 1815 pn533_poll_next_mod(dev);
17e9d9d4
SO		 1816 /* Not target found, turn radio off */
1817 queue_work(dev->wq, &dev->rf_work);
6fbbdc16 1818
b5193e5d
WR		 1819done:
1820 dev_kfree_skb(resp);
1821 return rc;
6fbbdc16
SO		 1822
1823stop_poll:
b5193e5d
WR		 1824 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1825
6fbbdc16
SO		 1826 pn533_poll_reset_mod_list(dev);
1827 dev->poll_protocols = 0;
b5193e5d 1828 return rc;
ad3823ce
SO		 1829}
1830
9e2d493e
WR		 1831static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1832 struct pn533_poll_modulations *mod)
c46ee386 1833{
b5193e5d 1834 struct sk_buff *skb;
c46ee386 1835
9e2d493e 1836 skb = pn533_alloc_skb(dev, mod->len);
b5193e5d
WR		 1837 if (!skb)
1838 return NULL;
c46ee386 1839
b5193e5d 1840 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
c46ee386 1841
b5193e5d 1842 return skb;
6fbbdc16 1843}
c46ee386 1844
6fbbdc16
SO		 1845static int pn533_send_poll_frame(struct pn533 *dev)
1846{
b5193e5d
WR		 1847 struct pn533_poll_modulations *mod;
1848 struct sk_buff *skb;
6fbbdc16 1849 int rc;
b5193e5d 1850 u8 cmd_code;
c46ee386 1851
b5193e5d 1852 mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1853
b4834839
JP		 1854 dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1855 __func__, mod->len);
c46ee386 1856
b5193e5d
WR		 1857 if (mod->len == 0) { /* Listen mode */
1858 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
9e2d493e 1859 skb = pn533_alloc_poll_tg_frame(dev);
b5193e5d
WR		 1860 } else { /* Polling mode */
1861 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
9e2d493e 1862 skb = pn533_alloc_poll_in_frame(dev, mod);
b5193e5d
WR		 1863 }
1864
1865 if (!skb) {
1866 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1867 return -ENOMEM;
1868 }
1869
1870 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1871 NULL);
1872 if (rc < 0) {
1873 dev_kfree_skb(skb);
6fbbdc16 1874 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
b5193e5d 1875 }
c46ee386 1876
6fbbdc16
SO		 1877 return rc;
1878}
1879
1880static void pn533_wq_poll(struct work_struct *work)
1881{
46f793b0 1882 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
6fbbdc16
SO		 1883 struct pn533_poll_modulations *cur_mod;
1884 int rc;
1885
1886 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1887
b4834839
JP		 1888 dev_dbg(&dev->interface->dev,
1889 "%s cancel_listen %d modulation len %d\n",
1890 __func__, dev->cancel_listen, cur_mod->len);
6fbbdc16
SO		 1891
1892 if (dev->cancel_listen == 1) {
1893 dev->cancel_listen = 0;
10cff29a 1894 pn533_abort_cmd(dev, GFP_ATOMIC);
c46ee386
AAJ		 1895 }
1896
6fbbdc16
SO		 1897 rc = pn533_send_poll_frame(dev);
1898 if (rc)
1899 return;
c46ee386 1900
6fbbdc16
SO		 1901 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1902 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1903
6fbbdc16 1904 return;
c46ee386
AAJ		 1905}
1906
fe7c5800
SO		 1907static int pn533_start_poll(struct nfc_dev *nfc_dev,
1908 u32 im_protocols, u32 tm_protocols)
1909{
1910 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dfccd0f5 1911 u8 rand_mod;
fe7c5800 1912
b4834839
JP		 1913 dev_dbg(&dev->interface->dev,
1914 "%s: im protocols 0x%x tm protocols 0x%x\n",
1915 __func__, im_protocols, tm_protocols);
fe7c5800
SO		 1916
1917 if (dev->tgt_active_prot) {
1918 nfc_dev_err(&dev->interface->dev,
1919 "Cannot poll with a target already activated");
1920 return -EBUSY;
1921 }
1922
51ad304c
SO		 1923 if (dev->tgt_mode) {
1924 nfc_dev_err(&dev->interface->dev,
1925 "Cannot poll while already being activated");
1926 return -EBUSY;
1927 }
1928
6fbbdc16
SO		 1929 if (tm_protocols) {
1930 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1931 if (dev->gb == NULL)
1932 tm_protocols = 0;
1933 }
ad3823ce 1934
6fbbdc16
SO		 1935 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1936 dev->poll_protocols = im_protocols;
1937 dev->listen_protocols = tm_protocols;
ad3823ce 1938
dfccd0f5
SO		 1939 /* Do not always start polling from the same modulation */
1940 get_random_bytes(&rand_mod, sizeof(rand_mod));
1941 rand_mod %= dev->poll_mod_count;
1942 dev->poll_mod_curr = rand_mod;
1943
6fbbdc16 1944 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1945}
1946
c46ee386
AAJ		 1947static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1948{
1949 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1950
6fbbdc16
SO		 1951 del_timer(&dev->listen_timer);
1952
c46ee386 1953 if (!dev->poll_mod_count) {
b4834839
JP		 1954 dev_dbg(&dev->interface->dev,
1955 "Polling operation was not running\n");
c46ee386
AAJ		 1956 return;
1957 }
1958
10cff29a 1959 pn533_abort_cmd(dev, GFP_KERNEL);
46f793b0 1960 flush_delayed_work(&dev->poll_work);
7c2a04a9 1961 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1962}
1963
1964static int pn533_activate_target_nfcdep(struct pn533 *dev)
1965{
cb950d93 1966 struct pn533_cmd_activate_response *rsp;
541d920b 1967 u16 gt_len;
c46ee386 1968 int rc;
cb950d93
WR		 1969 struct sk_buff *skb;
1970 struct sk_buff *resp;
c46ee386 1971
b4834839 1972 dev_dbg(&dev->interface->dev, "%s\n", __func__);
c46ee386 1973
9e2d493e 1974 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
cb950d93
WR		 1975 if (!skb)
1976 return -ENOMEM;
c46ee386 1977
cb950d93
WR		 1978 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1979 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1980
cb950d93
WR		 1981 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1982 if (IS_ERR(resp))
1983 return PTR_ERR(resp);
c46ee386 1984
37cf4fc6 1985 rsp = (struct pn533_cmd_activate_response *)resp->data;
cb950d93 1986 rc = rsp->status & PN533_CMD_RET_MASK;
8a0ecfe7 1987 if (rc != PN533_CMD_RET_SUCCESS) {
a45e1c8d
WR		 1988 nfc_dev_err(&dev->interface->dev,
1989 "Target activation failed (error 0x%x)", rc);
cb950d93 1990 dev_kfree_skb(resp);
c46ee386 1991 return -EIO;
8a0ecfe7 1992 }
c46ee386 1993
541d920b 1994 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1995 gt_len = resp->len - 16;
1996 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1997
cb950d93 1998 dev_kfree_skb(resp);
541d920b 1999 return rc;
c46ee386
AAJ		 2000}
2001
90099433
EL		 2002static int pn533_activate_target(struct nfc_dev *nfc_dev,
2003 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 2004{
2005 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2006 int rc;
2007
b4834839
JP		 2008 dev_dbg(&dev->interface->dev, "%s - protocol=%u\n",
2009 __func__, protocol);
c46ee386
AAJ		 2010
2011 if (dev->poll_mod_count) {
b4834839
JP		 2012 dev_err(&dev->interface->dev,
2013 "Cannot activate while polling\n");
c46ee386
AAJ		 2014 return -EBUSY;
2015 }
2016
2017 if (dev->tgt_active_prot) {
6ca55372
WR		 2018 nfc_dev_err(&dev->interface->dev,
2019 "There is already an active target");
c46ee386
AAJ		 2020 return -EBUSY;
2021 }
2022
2023 if (!dev->tgt_available_prots) {
6ca55372
WR		 2024 nfc_dev_err(&dev->interface->dev,
2025 "There is no available target to activate");
c46ee386
AAJ		 2026 return -EINVAL;
2027 }
2028
2029 if (!(dev->tgt_available_prots & (1 << protocol))) {
6ca55372
WR		 2030 nfc_dev_err(&dev->interface->dev,
2031 "Target doesn't support requested proto %u",
2032 protocol);
c46ee386
AAJ		 2033 return -EINVAL;
2034 }
2035
2036 if (protocol == NFC_PROTO_NFC_DEP) {
2037 rc = pn533_activate_target_nfcdep(dev);
2038 if (rc) {
6ca55372
WR		 2039 nfc_dev_err(&dev->interface->dev,
2040 "Activating target with DEP failed %d", rc);
c46ee386
AAJ		 2041 return rc;
2042 }
2043 }
2044
2045 dev->tgt_active_prot = protocol;
2046 dev->tgt_available_prots = 0;
2047
2048 return 0;
2049}
2050
90099433
EL		 2051static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
2052 struct nfc_target *target)
c46ee386
AAJ		 2053{
2054 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 2055 struct sk_buff *skb;
2056 struct sk_buff *resp;
c46ee386
AAJ		 2057 int rc;
2058
b4834839 2059 dev_dbg(&dev->interface->dev, "%s\n", __func__);
c46ee386
AAJ		 2060
2061 if (!dev->tgt_active_prot) {
2062 nfc_dev_err(&dev->interface->dev, "There is no active target");
2063 return;
2064 }
2065
2066 dev->tgt_active_prot = 0;
6ff73fd2
SO		 2067 skb_queue_purge(&dev->resp_q);
2068
9e2d493e 2069 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2070 if (!skb)
2071 return;
c46ee386 2072
cb950d93 2073 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 2074
cb950d93
WR		 2075 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2076 if (IS_ERR(resp))
c46ee386 2077 return;
c46ee386 2078
cb950d93 2079 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386 2080 if (rc != PN533_CMD_RET_SUCCESS)
6ca55372
WR		 2081 nfc_dev_err(&dev->interface->dev,
2082 "Error 0x%x when releasing the target", rc);
c46ee386 2083
cb950d93 2084 dev_kfree_skb(resp);
c46ee386
AAJ		 2085 return;
2086}
2087
361f3cb7
SO		 2088
2089static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 2090 struct sk_buff *resp)
361f3cb7 2091{
13003649 2092 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 2093 u8 target_gt_len;
2094 int rc;
13003649 2095 u8 active = *(u8 *)arg;
70418e6e
WR		 2096
2097 kfree(arg);
361f3cb7 2098
13003649
WR		 2099 if (IS_ERR(resp))
2100 return PTR_ERR(resp);
361f3cb7
SO		 2101
2102 if (dev->tgt_available_prots &&
2103 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2104 nfc_dev_err(&dev->interface->dev,
5d467742 2105 "The target does not support DEP");
13003649
WR		 2106 rc = -EINVAL;
2107 goto error;
361f3cb7
SO		 2108 }
2109
13003649
WR		 2110 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2111
2112 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 2113 if (rc != PN533_CMD_RET_SUCCESS) {
2114 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2115 "Bringing DEP link up failed (error 0x%x)", rc);
13003649 2116 goto error;
361f3cb7
SO		 2117 }
2118
2119 if (!dev->tgt_available_prots) {
13003649
WR		 2120 struct nfc_target nfc_target;
2121
b4834839 2122 dev_dbg(&dev->interface->dev, "Creating new target\n");
361f3cb7
SO		 2123
2124 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 2125 nfc_target.nfcid1_len = 10;
13003649 2126 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 2127 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2128 if (rc)
13003649 2129 goto error;
361f3cb7
SO		 2130
2131 dev->tgt_available_prots = 0;
2132 }
2133
2134 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2135
2136 /* ATR_RES general bytes are located at offset 17 */
13003649 2137 target_gt_len = resp->len - 17;
361f3cb7 2138 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 2139 rsp->gt, target_gt_len);
361f3cb7
SO		 2140 if (rc == 0)
2141 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 2142 dev->nfc_dev->targets[0].idx,
2143 !active, NFC_RF_INITIATOR);
361f3cb7 2144
13003649
WR		 2145error:
2146 dev_kfree_skb(resp);
2147 return rc;
361f3cb7
SO		 2148}
2149
17e9d9d4 2150static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
d7f3345d 2151#define PASSIVE_DATA_LEN 5
90099433 2152static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
37cf4fc6 2153 u8 comm_mode, u8 *gb, size_t gb_len)
361f3cb7
SO		 2154{
2155 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649 2156 struct sk_buff *skb;
5eef4845
SO		 2157 int rc, skb_len;
2158 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
d7f3345d 2159 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7 2160
b4834839 2161 dev_dbg(&dev->interface->dev, "%s\n", __func__);
361f3cb7 2162
361f3cb7
SO		 2163 if (dev->poll_mod_count) {
2164 nfc_dev_err(&dev->interface->dev,
5d467742 2165 "Cannot bring the DEP link up while polling");
361f3cb7
SO		 2166 return -EBUSY;
2167 }
2168
2169 if (dev->tgt_active_prot) {
2170 nfc_dev_err(&dev->interface->dev,
5d467742 2171 "There is already an active target");
361f3cb7
SO		 2172 return -EBUSY;
2173 }
2174
13003649 2175 skb_len = 3 + gb_len; /* ActPass + BR + Next */
5eef4845 2176 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2177
5eef4845
SO		 2178 /* NFCID3 */
2179 skb_len += NFC_NFCID3_MAXSIZE;
2180 if (target && !target->nfcid2_len) {
2181 nfcid3[0] = 0x1;
2182 nfcid3[1] = 0xfe;
2183 get_random_bytes(nfcid3 + 2, 6);
2184 }
322bce95 2185
9e2d493e 2186 skb = pn533_alloc_skb(dev, skb_len);
13003649 2187 if (!skb)
361f3cb7
SO		 2188 return -ENOMEM;
2189
13003649 2190 *skb_put(skb, 1) = !comm_mode; /* ActPass */
5eef4845 2191 *skb_put(skb, 1) = 0x02; /* 424 kbps */
13003649
WR		 2192
2193 next = skb_put(skb, 1); /* Next */
2194 *next = 0;
361f3cb7 2195
5eef4845
SO		 2196 /* Copy passive data */
2197 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2198 *next |= 1;
d7f3345d 2199
5eef4845
SO		 2200 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2201 if (target && target->nfcid2_len)
322bce95
SO		 2202 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2203 target->nfcid2_len);
5eef4845
SO		 2204 else
2205 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2206 NFC_NFCID3_MAXSIZE);
2207 *next |= 2;
322bce95 2208
47807d3d 2209 if (gb != NULL && gb_len > 0) {
13003649
WR		 2210 memcpy(skb_put(skb, gb_len), gb, gb_len);
2211 *next |= 4; /* We have some Gi */
361f3cb7 2212 } else {
13003649 2213 *next = 0;
361f3cb7
SO		 2214 }
2215
13003649
WR		 2216 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2217 if (!arg) {
2218 dev_kfree_skb(skb);
2219 return -ENOMEM;
2220 }
361f3cb7 2221
13003649 2222 *arg = !comm_mode;
361f3cb7 2223
17e9d9d4
SO		 2224 pn533_rf_field(dev->nfc_dev, 0);
2225
13003649
WR		 2226 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2227 pn533_in_dep_link_up_complete, arg);
2228
2229 if (rc < 0) {
2230 dev_kfree_skb(skb);
2231 kfree(arg);
2232 }
361f3cb7
SO		 2233
2234 return rc;
2235}
2236
2237static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2238{
6fbbdc16
SO		 2239 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2240
b4834839 2241 dev_dbg(&dev->interface->dev, "%s\n", __func__);
fcfafc76 2242
6fbbdc16
SO		 2243 pn533_poll_reset_mod_list(dev);
2244
10cff29a
WR		 2245 if (dev->tgt_mode || dev->tgt_active_prot)
2246 pn533_abort_cmd(dev, GFP_KERNEL);
51ad304c
SO		 2247
2248 dev->tgt_active_prot = 0;
2249 dev->tgt_mode = 0;
2250
2251 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2252
2253 return 0;
2254}
2255
c46ee386 2256struct pn533_data_exchange_arg {
c46ee386
AAJ		 2257 data_exchange_cb_t cb;
2258 void *cb_context;
2259};
2260
6ff73fd2
SO		 2261static struct sk_buff *pn533_build_response(struct pn533 *dev)
2262{
2263 struct sk_buff *skb, *tmp, *t;
2264 unsigned int skb_len = 0, tmp_len = 0;
2265
b4834839 2266 dev_dbg(&dev->interface->dev, "%s\n", __func__);
6ff73fd2
SO		 2267
2268 if (skb_queue_empty(&dev->resp_q))
2269 return NULL;
2270
2271 if (skb_queue_len(&dev->resp_q) == 1) {
2272 skb = skb_dequeue(&dev->resp_q);
2273 goto out;
2274 }
2275
2276 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2277 skb_len += tmp->len;
2278
b4834839
JP		 2279 dev_dbg(&dev->interface->dev, "%s total length %d\n",
2280 __func__, skb_len);
6ff73fd2
SO		 2281
2282 skb = alloc_skb(skb_len, GFP_KERNEL);
2283 if (skb == NULL)
2284 goto out;
2285
2286 skb_put(skb, skb_len);
2287
2288 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2289 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2290 tmp_len += tmp->len;
2291 }
2292
2293out:
2294 skb_queue_purge(&dev->resp_q);
2295
2296 return skb;
2297}
2298
c46ee386 2299static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2300 struct sk_buff *resp)
c46ee386
AAJ		 2301{
2302 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2303 struct sk_buff *skb;
2304 int rc = 0;
2305 u8 status, ret, mi;
c46ee386 2306
b4834839 2307 dev_dbg(&dev->interface->dev, "%s\n", __func__);
c46ee386 2308
b1e666f5
WR		 2309 if (IS_ERR(resp)) {
2310 rc = PTR_ERR(resp);
2311 goto _error;
c46ee386
AAJ		 2312 }
2313
b1e666f5
WR		 2314 status = resp->data[0];
2315 ret = status & PN533_CMD_RET_MASK;
2316 mi = status & PN533_CMD_MI_MASK;
2317
2318 skb_pull(resp, sizeof(status));
c46ee386 2319
b1e666f5
WR		 2320 if (ret != PN533_CMD_RET_SUCCESS) {
2321 nfc_dev_err(&dev->interface->dev,
a45e1c8d 2322 "Exchanging data failed (error 0x%x)", ret);
b1e666f5 2323 rc = -EIO;
c46ee386
AAJ		 2324 goto error;
2325 }
2326
b1e666f5 2327 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2328
b1e666f5
WR		 2329 if (mi) {
2330 dev->cmd_complete_mi_arg = arg;
963a82e0
OG		 2331 queue_work(dev->wq, &dev->mi_rx_work);
2332 return -EINPROGRESS;
2333 }
2334
2335 /* Prepare for the next round */
2336 if (skb_queue_len(&dev->fragment_skb) > 0) {
2337 dev->cmd_complete_dep_arg = arg;
2338 queue_work(dev->wq, &dev->mi_tx_work);
2339
6ff73fd2 2340 return -EINPROGRESS;
c46ee386
AAJ		 2341 }
2342
6ff73fd2 2343 skb = pn533_build_response(dev);
b1e666f5 2344 if (!skb)
6ff73fd2 2345 goto error;
c46ee386 2346
6ff73fd2 2347 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2348 kfree(arg);
2349 return 0;
2350
2351error:
b1e666f5
WR		 2352 dev_kfree_skb(resp);
2353_error:
6ff73fd2 2354 skb_queue_purge(&dev->resp_q);
b1e666f5 2355 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2356 kfree(arg);
b1e666f5 2357 return rc;
c46ee386
AAJ		 2358}
2359
963a82e0
OG		 2360/* Split the Tx skb into small chunks */
2361static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2362{
2363 struct sk_buff *frag;
2364 int frag_size;
2365
2366 do {
2367 /* Remaining size */
2368 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2369 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2370 else
2371 frag_size = skb->len;
2372
2373 /* Allocate and reserve */
2374 frag = pn533_alloc_skb(dev, frag_size);
2375 if (!frag) {
2376 skb_queue_purge(&dev->fragment_skb);
2377 break;
2378 }
2379
2380 /* Reserve the TG/MI byte */
2381 skb_reserve(frag, 1);
2382
2383 /* MI + TG */
2384 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2385 *skb_push(frag, sizeof(u8)) = (PN533_CMD_MI_MASK | 1);
2386 else
2387 *skb_push(frag, sizeof(u8)) = 1; /* TG */
2388
2389 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2390
2391 /* Reduce the size of incoming buffer */
2392 skb_pull(skb, frag_size);
2393
2394 /* Add this to skb_queue */
2395 skb_queue_tail(&dev->fragment_skb, frag);
2396
2397 } while (skb->len > 0);
2398
2399 dev_kfree_skb(skb);
2400
2401 return skb_queue_len(&dev->fragment_skb);
2402}
2403
be9ae4ce
SO		 2404static int pn533_transceive(struct nfc_dev *nfc_dev,
2405 struct nfc_target *target, struct sk_buff *skb,
2406 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2407{
2408 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2409 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2410 int rc;
2411
b4834839 2412 dev_dbg(&dev->interface->dev, "%s\n", __func__);
c46ee386
AAJ		 2413
2414 if (!dev->tgt_active_prot) {
6ca55372
WR		 2415 nfc_dev_err(&dev->interface->dev,
2416 "Can't exchange data if there is no active target");
c46ee386
AAJ		 2417 rc = -EINVAL;
2418 goto error;
2419 }
2420
b1e666f5 2421 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2422 if (!arg) {
2423 rc = -ENOMEM;
b1e666f5 2424 goto error;
c46ee386
AAJ		 2425 }
2426
c46ee386
AAJ		 2427 arg->cb = cb;
2428 arg->cb_context = cb_context;
2429
b1e666f5
WR		 2430 switch (dev->device_type) {
2431 case PN533_DEVICE_PASORI:
2432 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2433 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2434 skb,
2435 pn533_data_exchange_complete,
2436 arg);
2437
2438 break;
2439 }
2440 default:
963a82e0
OG		 2441 /* jumbo frame ? */
2442 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2443 rc = pn533_fill_fragment_skbs(dev, skb);
2444 if (rc <= 0)
2445 goto error;
2446
2447 skb = skb_dequeue(&dev->fragment_skb);
2448 if (!skb) {
2449 rc = -EIO;
2450 goto error;
2451 }
2452 } else {
2453 *skb_push(skb, sizeof(u8)) = 1; /* TG */
2454 }
b1e666f5
WR		 2455
2456 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2457 skb, pn533_data_exchange_complete,
2458 arg);
2459
2460 break;
c46ee386
AAJ		 2461 }
2462
b1e666f5
WR		 2463 if (rc < 0) /* rc from send_async */
2464 goto error;
2465
c46ee386
AAJ		 2466 return 0;
2467
c46ee386 2468error:
b1e666f5
WR		 2469 kfree(arg);
2470 dev_kfree_skb(skb);
c46ee386
AAJ		 2471 return rc;
2472}
2473
dadb06f2 2474static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2475 struct sk_buff *resp)
dadb06f2 2476{
e4878823 2477 u8 status;
5b412fd1 2478
b4834839 2479 dev_dbg(&dev->interface->dev, "%s\n", __func__);
dadb06f2 2480
e4878823
WR		 2481 if (IS_ERR(resp))
2482 return PTR_ERR(resp);
5b412fd1 2483
e4878823 2484 status = resp->data[0];
dadb06f2 2485
e4878823 2486 dev_kfree_skb(resp);
dadb06f2 2487
e4878823 2488 if (status != 0) {
dadb06f2
SO		 2489 nfc_tm_deactivated(dev->nfc_dev);
2490
51ad304c
SO		 2491 dev->tgt_mode = 0;
2492
dadb06f2
SO		 2493 return 0;
2494 }
2495
2496 queue_work(dev->wq, &dev->tg_work);
2497
2498 return 0;
2499}
2500
2501static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2502{
2503 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2504 int rc;
2505
b4834839 2506 dev_dbg(&dev->interface->dev, "%s\n", __func__);
dadb06f2 2507
e4878823 2508 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2509 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2510 "Data length greater than the max allowed: %d",
2511 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2512 return -ENOSYS;
dadb06f2
SO		 2513 }
2514
e4878823
WR		 2515 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2516 pn533_tm_send_complete, NULL);
2517 if (rc < 0)
2518 dev_kfree_skb(skb);
dadb06f2
SO		 2519
2520 return rc;
2521}
2522
6ff73fd2
SO		 2523static void pn533_wq_mi_recv(struct work_struct *work)
2524{
963a82e0 2525 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
b1e666f5 2526 struct sk_buff *skb;
6ff73fd2
SO		 2527 int rc;
2528
b4834839 2529 dev_dbg(&dev->interface->dev, "%s\n", __func__);
6ff73fd2 2530
9e2d493e 2531 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
b1e666f5
WR		 2532 if (!skb)
2533 goto error;
6ff73fd2 2534
b1e666f5
WR		 2535 switch (dev->device_type) {
2536 case PN533_DEVICE_PASORI:
2537 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2538 rc = pn533_send_cmd_direct_async(dev,
2539 PN533_CMD_IN_COMM_THRU,
2540 skb,
2541 pn533_data_exchange_complete,
2542 dev->cmd_complete_mi_arg);
6ff73fd2 2543
b1e666f5
WR		 2544 break;
2545 }
2546 default:
2547 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2548
b1e666f5
WR		 2549 rc = pn533_send_cmd_direct_async(dev,
2550 PN533_CMD_IN_DATA_EXCHANGE,
2551 skb,
2552 pn533_data_exchange_complete,
2553 dev->cmd_complete_mi_arg);
b1bb290a 2554
b1e666f5 2555 break;
6ff73fd2
SO		 2556 }
2557
b1e666f5 2558 if (rc == 0) /* success */
6ff73fd2
SO		 2559 return;
2560
b1e666f5
WR		 2561 nfc_dev_err(&dev->interface->dev,
2562 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2563
b1e666f5 2564 dev_kfree_skb(skb);
140ef7f6 2565 kfree(dev->cmd_complete_mi_arg);
6ff73fd2 2566
b1e666f5 2567error:
6ff73fd2 2568 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2569 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2570}
2571
963a82e0
OG		 2572static void pn533_wq_mi_send(struct work_struct *work)
2573{
2574 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2575 struct sk_buff *skb;
2576 int rc;
2577
b4834839 2578 dev_dbg(&dev->interface->dev, "%s\n", __func__);
963a82e0
OG		 2579
2580 /* Grab the first skb in the queue */
2581 skb = skb_dequeue(&dev->fragment_skb);
2582
2583 if (skb == NULL) { /* No more data */
2584 /* Reset the queue for future use */
2585 skb_queue_head_init(&dev->fragment_skb);
2586 goto error;
2587 }
2588
2589 switch (dev->device_type) {
2590 case PN533_DEVICE_PASORI:
2591 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2592 rc = -EIO;
2593 break;
2594 }
2595
2596 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2597 skb,
2598 pn533_data_exchange_complete,
2599 dev->cmd_complete_dep_arg);
2600
2601 break;
2602
2603 default:
2604 /* Still some fragments? */
2605 rc = pn533_send_cmd_direct_async(dev,PN533_CMD_IN_DATA_EXCHANGE,
2606 skb,
2607 pn533_data_exchange_complete,
2608 dev->cmd_complete_dep_arg);
2609
2610 break;
2611 }
2612
2613 if (rc == 0) /* success */
2614 return;
2615
2616 nfc_dev_err(&dev->interface->dev,
2617 "Error %d when trying to perform data_exchange", rc);
2618
2619 dev_kfree_skb(skb);
2620 kfree(dev->cmd_complete_dep_arg);
2621
2622error:
2623 pn533_send_ack(dev, GFP_KERNEL);
2624 queue_work(dev->wq, &dev->cmd_work);
2625}
2626
c46ee386
AAJ		 2627static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2628 u8 cfgdata_len)
2629{
cb950d93
WR		 2630 struct sk_buff *skb;
2631 struct sk_buff *resp;
cb950d93 2632 int skb_len;
c46ee386 2633
b4834839 2634 dev_dbg(&dev->interface->dev, "%s\n", __func__);
c46ee386 2635
cb950d93 2636 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2637
9e2d493e 2638 skb = pn533_alloc_skb(dev, skb_len);
cb950d93
WR		 2639 if (!skb)
2640 return -ENOMEM;
c46ee386 2641
cb950d93
WR		 2642 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2643 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2644
cb950d93
WR		 2645 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2646 if (IS_ERR(resp))
2647 return PTR_ERR(resp);
c46ee386 2648
cb950d93
WR		 2649 dev_kfree_skb(resp);
2650 return 0;
2651}
2652
2653static int pn533_get_firmware_version(struct pn533 *dev,
2654 struct pn533_fw_version *fv)
2655{
2656 struct sk_buff *skb;
2657 struct sk_buff *resp;
2658
9e2d493e 2659 skb = pn533_alloc_skb(dev, 0);
cb950d93
WR		 2660 if (!skb)
2661 return -ENOMEM;
2662
2663 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2664 if (IS_ERR(resp))
2665 return PTR_ERR(resp);
2666
2667 fv->ic = resp->data[0];
2668 fv->ver = resp->data[1];
2669 fv->rev = resp->data[2];
2670 fv->support = resp->data[3];
2671
2672 dev_kfree_skb(resp);
2673 return 0;
c46ee386
AAJ		 2674}
2675
f75c2913 2676static int pn533_pasori_fw_reset(struct pn533 *dev)
5c7b0531 2677{
cb950d93
WR		 2678 struct sk_buff *skb;
2679 struct sk_buff *resp;
5c7b0531 2680
b4834839 2681 dev_dbg(&dev->interface->dev, "%s\n", __func__);
5c7b0531 2682
9e2d493e 2683 skb = pn533_alloc_skb(dev, sizeof(u8));
cb950d93
WR		 2684 if (!skb)
2685 return -ENOMEM;
5c7b0531 2686
cb950d93 2687 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2688
cb950d93
WR		 2689 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2690 if (IS_ERR(resp))
2691 return PTR_ERR(resp);
5c7b0531 2692
cb950d93 2693 dev_kfree_skb(resp);
5c7b0531 2694
94c5c156 2695 return 0;
5c7b0531
SO		 2696}
2697
53cf4839
WR		 2698struct pn533_acr122_poweron_rdr_arg {
2699 int rc;
2700 struct completion done;
2701};
2702
2703static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2704{
2705 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2706
b4834839 2707 dev_dbg(&urb->dev->dev, "%s\n", __func__);
53cf4839 2708
86eca4e7 2709 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2710 urb->transfer_buffer, urb->transfer_buffer_length,
2711 false);
2712
2713 arg->rc = urb->status;
2714 complete(&arg->done);
2715}
2716
2717static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2718{
2719 /* Power on th reader (CCID cmd) */
2720 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2721 0, 0, 0, 0, 0, 0, 3, 0, 0};
2722 u8 buf[255];
2723 int rc;
2724 void *cntx;
2725 struct pn533_acr122_poweron_rdr_arg arg;
2726
b4834839 2727 dev_dbg(&dev->interface->dev, "%s\n", __func__);
53cf4839
WR		 2728
2729 init_completion(&arg.done);
2730 cntx = dev->in_urb->context; /* backup context */
2731
2732 dev->in_urb->transfer_buffer = buf;
2733 dev->in_urb->transfer_buffer_length = 255;
2734 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2735 dev->in_urb->context = &arg;
2736
2737 dev->out_urb->transfer_buffer = cmd;
2738 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2739
86eca4e7 2740 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
53cf4839
WR		 2741 cmd, sizeof(cmd), false);
2742
2743 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2744 if (rc) {
2745 nfc_dev_err(&dev->interface->dev,
2746 "Reader power on cmd error %d", rc);
2747 return rc;
2748 }
2749
2750 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2751 if (rc) {
2752 nfc_dev_err(&dev->interface->dev,
2753 "Can't submit for reader power on cmd response %d",
2754 rc);
2755 return rc;
2756 }
2757
2758 wait_for_completion(&arg.done);
2759 dev->in_urb->context = cntx; /* restore context */
2760
2761 return arg.rc;
2762}
2763
60d9edd5
SO		 2764static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2765{
2766 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2767 u8 rf_field = !!rf;
2768 int rc;
2769
3a8eab39
SO		 2770 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2771
60d9edd5
SO		 2772 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2773 (u8 *)&rf_field, 1);
2774 if (rc) {
2775 nfc_dev_err(&dev->interface->dev,
2776 "Error on setting RF field");
2777 return rc;
2778 }
2779
2780 return rc;
2781}
2782
2783int pn533_dev_up(struct nfc_dev *nfc_dev)
2784{
2785 return pn533_rf_field(nfc_dev, 1);
2786}
2787
2788int pn533_dev_down(struct nfc_dev *nfc_dev)
2789{
2790 return pn533_rf_field(nfc_dev, 0);
2791}
2792
5c7b0531 2793static struct nfc_ops pn533_nfc_ops = {
60d9edd5
SO		 2794 .dev_up = pn533_dev_up,
2795 .dev_down = pn533_dev_down,
361f3cb7
SO		 2796 .dep_link_up = pn533_dep_link_up,
2797 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2798 .start_poll = pn533_start_poll,
2799 .stop_poll = pn533_stop_poll,
2800 .activate_target = pn533_activate_target,
2801 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2802 .im_transceive = pn533_transceive,
dadb06f2 2803 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2804};
2805
5c7b0531
SO		 2806static int pn533_setup(struct pn533 *dev)
2807{
2808 struct pn533_config_max_retries max_retries;
2809 struct pn533_config_timing timing;
2810 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2811 int rc;
2812
2813 switch (dev->device_type) {
2814 case PN533_DEVICE_STD:
5c7b0531 2815 case PN533_DEVICE_PASORI:
53cf4839 2816 case PN533_DEVICE_ACR122U:
5c7b0531
SO		 2817 max_retries.mx_rty_atr = 0x2;
2818 max_retries.mx_rty_psl = 0x1;
2819 max_retries.mx_rty_passive_act =
2820 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2821
2822 timing.rfu = PN533_CONFIG_TIMING_102;
2823 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2824 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2825
2826 break;
2827
2828 default:
2829 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2830 dev->device_type);
2831 return -EINVAL;
2832 }
2833
2834 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2835 (u8 *)&max_retries, sizeof(max_retries));
2836 if (rc) {
2837 nfc_dev_err(&dev->interface->dev,
2838 "Error on setting MAX_RETRIES config");
2839 return rc;
2840 }
2841
2842
2843 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2844 (u8 *)&timing, sizeof(timing));
2845 if (rc) {
2846 nfc_dev_err(&dev->interface->dev,
2847 "Error on setting RF timings");
2848 return rc;
2849 }
2850
2851 switch (dev->device_type) {
2852 case PN533_DEVICE_STD:
2853 break;
2854
2855 case PN533_DEVICE_PASORI:
f75c2913 2856 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2857
2858 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2859 pasori_cfg, 3);
2860 if (rc) {
2861 nfc_dev_err(&dev->interface->dev,
2862 "Error while settings PASORI config");
2863 return rc;
2864 }
2865
f75c2913 2866 pn533_pasori_fw_reset(dev);
5c7b0531
SO		 2867
2868 break;
2869 }
2870
2871 return 0;
2872}
2873
c46ee386
AAJ		 2874static int pn533_probe(struct usb_interface *interface,
2875 const struct usb_device_id *id)
2876{
cb950d93 2877 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2878 struct pn533 *dev;
2879 struct usb_host_interface *iface_desc;
2880 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2881 int in_endpoint = 0;
2882 int out_endpoint = 0;
2883 int rc = -ENOMEM;
2884 int i;
2885 u32 protocols;
2886
2887 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2888 if (!dev)
2889 return -ENOMEM;
2890
2891 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2892 dev->interface = interface;
0201ed03 2893 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2894
2895 iface_desc = interface->cur_altsetting;
2896 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2897 endpoint = &iface_desc->endpoint[i].desc;
2898
8d25ca79 2899 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2900 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2901
8d25ca79 2902 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2903 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2904 }
2905
2906 if (!in_endpoint || !out_endpoint) {
6ca55372
WR		 2907 nfc_dev_err(&interface->dev,
2908 "Could not find bulk-in or bulk-out endpoint");
c46ee386
AAJ		 2909 rc = -ENODEV;
2910 goto error;
2911 }
2912
c46ee386 2913 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
c46ee386
AAJ		 2914 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2915
a5798094 2916 if (!dev->in_urb || !dev->out_urb)
c46ee386
AAJ		 2917 goto error;
2918
2919 usb_fill_bulk_urb(dev->in_urb, dev->udev,
5d467742
WR		 2920 usb_rcvbulkpipe(dev->udev, in_endpoint),
2921 NULL, 0, NULL, dev);
c46ee386 2922 usb_fill_bulk_urb(dev->out_urb, dev->udev,
5d467742
WR		 2923 usb_sndbulkpipe(dev->udev, out_endpoint),
2924 NULL, 0, pn533_send_complete, dev);
c46ee386 2925
5d50b364
SO		 2926 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2927 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
963a82e0
OG		 2928 INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
2929 INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
103b34cf 2930 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
46f793b0 2931 INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
17e9d9d4 2932 INIT_WORK(&dev->rf_work, pn533_wq_rf);
58637c9b 2933 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2934 if (dev->wq == NULL)
2935 goto error;
c46ee386 2936
6fbbdc16
SO		 2937 init_timer(&dev->listen_timer);
2938 dev->listen_timer.data = (unsigned long) dev;
2939 dev->listen_timer.function = pn533_listen_mode_timer;
2940
6ff73fd2 2941 skb_queue_head_init(&dev->resp_q);
963a82e0 2942 skb_queue_head_init(&dev->fragment_skb);
6ff73fd2 2943
5d50b364
SO		 2944 INIT_LIST_HEAD(&dev->cmd_queue);
2945
c46ee386
AAJ		 2946 usb_set_intfdata(interface, dev);
2947
9e2d493e 2948 dev->ops = &pn533_std_frame_ops;
c46ee386 2949
58520373 2950 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
5c7b0531
SO		 2951 dev->device_type = id->driver_info;
2952 switch (dev->device_type) {
2953 case PN533_DEVICE_STD:
2954 protocols = PN533_ALL_PROTOCOLS;
2955 break;
2956
2957 case PN533_DEVICE_PASORI:
2958 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2959 break;
2960
53cf4839
WR		 2961 case PN533_DEVICE_ACR122U:
2962 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2963 dev->ops = &pn533_acr122_frame_ops;
2964 dev->protocol_type = PN533_PROTO_REQ_RESP,
2965
2966 rc = pn533_acr122_poweron_rdr(dev);
2967 if (rc < 0) {
2968 nfc_dev_err(&dev->interface->dev,
2969 "Couldn't poweron the reader (error %d)",
2970 rc);
2971 goto destroy_wq;
2972 }
2973 break;
2974
5c7b0531
SO		 2975 default:
2976 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2977 dev->device_type);
2978 rc = -EINVAL;
2979 goto destroy_wq;
2980 }
c46ee386 2981
9e2d493e
WR		 2982 memset(&fw_ver, 0, sizeof(fw_ver));
2983 rc = pn533_get_firmware_version(dev, &fw_ver);
2984 if (rc < 0)
2985 goto destroy_wq;
2986
2987 nfc_dev_info(&dev->interface->dev,
86eca4e7
OG		 2988 "NXP PN5%02X firmware ver %d.%d now attached",
2989 fw_ver.ic, fw_ver.ver, fw_ver.rev);
9e2d493e
WR		 2990
2991
e8753043 2992 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
9e2d493e 2993 dev->ops->tx_header_len +
e8753043 2994 PN533_CMD_DATAEXCH_HEAD_LEN,
9e2d493e 2995 dev->ops->tx_tail_len);
4674d0fe
WY		 2996 if (!dev->nfc_dev) {
2997 rc = -ENOMEM;
4849f85e 2998 goto destroy_wq;
4674d0fe 2999 }
c46ee386
AAJ		 3000
3001 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
3002 nfc_set_drvdata(dev->nfc_dev, dev);
3003
3004 rc = nfc_register_device(dev->nfc_dev);
3005 if (rc)
3006 goto free_nfc_dev;
3007
5c7b0531
SO		 3008 rc = pn533_setup(dev);
3009 if (rc)
34a85bfc 3010 goto unregister_nfc_dev;
34a85bfc 3011
c46ee386
AAJ		 3012 return 0;
3013
9f2f8ba1
SO		 3014unregister_nfc_dev:
3015 nfc_unregister_device(dev->nfc_dev);
3016
c46ee386
AAJ		 3017free_nfc_dev:
3018 nfc_free_device(dev->nfc_dev);
9f2f8ba1 3019
4849f85e
SO		 3020destroy_wq:
3021 destroy_workqueue(dev->wq);
c46ee386 3022error:
c46ee386 3023 usb_free_urb(dev->in_urb);
c46ee386 3024 usb_free_urb(dev->out_urb);
7c5a54fb 3025 usb_put_dev(dev->udev);
c46ee386
AAJ		 3026 kfree(dev);
3027 return rc;
3028}
3029
3030static void pn533_disconnect(struct usb_interface *interface)
3031{
3032 struct pn533 *dev;
5d50b364 3033 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 3034
3035 dev = usb_get_intfdata(interface);
3036 usb_set_intfdata(interface, NULL);
3037
3038 nfc_unregister_device(dev->nfc_dev);
3039 nfc_free_device(dev->nfc_dev);
3040
3041 usb_kill_urb(dev->in_urb);
3042 usb_kill_urb(dev->out_urb);
3043
46f793b0 3044 flush_delayed_work(&dev->poll_work);
4849f85e 3045 destroy_workqueue(dev->wq);
c46ee386 3046
6ff73fd2
SO		 3047 skb_queue_purge(&dev->resp_q);
3048
6fbbdc16
SO		 3049 del_timer(&dev->listen_timer);
3050
5d50b364
SO		 3051 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
3052 list_del(&cmd->queue);
3053 kfree(cmd);
3054 }
3055
c46ee386 3056 usb_free_urb(dev->in_urb);
c46ee386
AAJ		 3057 usb_free_urb(dev->out_urb);
3058 kfree(dev);
3059
276556db 3060 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 3061}
3062
3063static struct usb_driver pn533_driver = {
3064 .name = "pn533",
3065 .probe = pn533_probe,
3066 .disconnect = pn533_disconnect,
3067 .id_table = pn533_table,
3068};
3069
fe748483 3070module_usb_driver(pn533_driver);
c46ee386 3071
e70b96e9
WR		 3072MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
3073MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
3074MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
c46ee386
AAJ		 3075MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
3076MODULE_VERSION(VERSION);
3077MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)