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mm/hwpoison: don't set migration type twice to avoid holding heavily contend zone...
[linux-2.6.git] / drivers / nfc / pn533.c
blob5df730be88a388ba28f705fde82fdce04b1ff88e
1 /*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 * Copyright (C) 2012-2013 Tieto Poland
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>
28 #include <net/nfc/nfc.h>
29
30 #define VERSION "0.2"
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
38 #define SONY_VENDOR_ID 0x054c
39 #define PASORI_PRODUCT_ID 0x02e1
40
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
47
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)
52
53 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
54 NFC_PROTO_MIFARE_MASK | \
55 NFC_PROTO_FELICA_MASK | \
56 NFC_PROTO_ISO14443_MASK | \
57 NFC_PROTO_NFC_DEP_MASK)
58
59 static const struct usb_device_id pn533_table[] = {
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 },
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 },
80 { }
81 };
82 MODULE_DEVICE_TABLE(usb, pn533_table);
83
84 /* How much time we spend listening for initiators */
85 #define PN533_LISTEN_TIME 2
86 /* Delay between each poll frame (ms) */
87 #define PN533_POLL_INTERVAL 10
88
89 /* Standard pn533 frame definitions (standard and extended)*/
90 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
91 + 2) /* data[0] TFI, data[1] CC */
92 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
93
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
100 /*
101 * Max extended frame payload len, excluding TFI and CC
102 * which are already in PN533_FRAME_HEADER_LEN.
103 */
104 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
105
106 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
107 Postamble (1) */
108 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
109 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
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)])
114
115 /* start of frame */
116 #define PN533_STD_FRAME_SOF 0x00FF
117
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
122
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
138 /* PN533 Commands */
139 #define PN533_FRAME_CMD(f) (f->data[1])
140
141 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
142 #define PN533_CMD_RF_CONFIGURATION 0x32
143 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
144 #define PN533_CMD_IN_COMM_THRU 0x42
145 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
146 #define PN533_CMD_IN_ATR 0x50
147 #define PN533_CMD_IN_RELEASE 0x52
148 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
149
150 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
151 #define PN533_CMD_TG_GET_DATA 0x86
152 #define PN533_CMD_TG_SET_DATA 0x8e
153 #define PN533_CMD_UNDEF 0xff
154
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
162 struct pn533;
163
164 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
165 struct sk_buff *resp);
166
167 /* structs for pn533 commands */
168
169 /* PN533_CMD_GET_FIRMWARE_VERSION */
170 struct pn533_fw_version {
171 u8 ic;
172 u8 ver;
173 u8 rev;
174 u8 support;
175 };
176
177 /* PN533_CMD_RF_CONFIGURATION */
178 #define PN533_CFGITEM_RF_FIELD 0x01
179 #define PN533_CFGITEM_TIMING 0x02
180 #define PN533_CFGITEM_MAX_RETRIES 0x05
181 #define PN533_CFGITEM_PASORI 0x82
182
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
186
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
192 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
193 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
194
195 struct pn533_config_max_retries {
196 u8 mx_rty_atr;
197 u8 mx_rty_psl;
198 u8 mx_rty_passive_act;
199 } __packed;
200
201 struct pn533_config_timing {
202 u8 rfu;
203 u8 atr_res_timeout;
204 u8 dep_timeout;
205 } __packed;
206
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
223 union 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 */
237 enum {
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,
243 PN533_LISTEN_MOD,
244
245 __PN533_POLL_MOD_AFTER_LAST,
246 };
247 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
248
249 struct 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
258 static const struct pn533_poll_modulations poll_mod[] = {
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,
273 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
274 .tsn = 0x03,
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,
286 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
287 .tsn = 0x03,
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 },
311 [PN533_LISTEN_MOD] = {
312 .len = 0,
313 },
314 };
315
316 /* PN533_CMD_IN_ATR */
317
318 struct 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
330 struct 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;
342
343
344 /* PN533_TG_INIT_AS_TARGET */
345 #define PN533_INIT_TARGET_PASSIVE 0x1
346 #define PN533_INIT_TARGET_DEP 0x2
347
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
352 enum pn533_protocol_type {
353 PN533_PROTO_REQ_ACK_RESP = 0,
354 PN533_PROTO_REQ_RESP
355 };
356
357 struct pn533 {
358 struct usb_device *udev;
359 struct usb_interface *interface;
360 struct nfc_dev *nfc_dev;
361 u32 device_type;
362 enum pn533_protocol_type protocol_type;
363
364 struct urb *out_urb;
365 struct urb *in_urb;
366
367 struct sk_buff_head resp_q;
368 struct sk_buff_head fragment_skb;
369
370 struct workqueue_struct *wq;
371 struct work_struct cmd_work;
372 struct work_struct cmd_complete_work;
373 struct delayed_work poll_work;
374 struct work_struct mi_rx_work;
375 struct work_struct mi_tx_work;
376 struct work_struct tg_work;
377 struct work_struct rf_work;
378
379 struct list_head cmd_queue;
380 struct pn533_cmd *cmd;
381 u8 cmd_pending;
382 struct mutex cmd_lock; /* protects cmd queue */
383
384 void *cmd_complete_mi_arg;
385 void *cmd_complete_dep_arg;
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;
391 u32 listen_protocols;
392 struct timer_list listen_timer;
393 int cancel_listen;
394
395 u8 *gb;
396 size_t gb_len;
397
398 u8 tgt_available_prots;
399 u8 tgt_active_prot;
400 u8 tgt_mode;
401
402 struct pn533_frame_ops *ops;
403 };
404
405 struct pn533_cmd {
406 struct list_head queue;
407 u8 code;
408 int status;
409 struct sk_buff *req;
410 struct sk_buff *resp;
411 int resp_len;
412 pn533_send_async_complete_t complete_cb;
413 void *complete_cb_context;
414 };
415
416 struct pn533_std_frame {
417 u8 preamble;
418 __be16 start_frame;
419 u8 datalen;
420 u8 datalen_checksum;
421 u8 data[];
422 } __packed;
423
424 struct 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
433 struct 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
440 bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
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
449 struct 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
459 struct pn533_acr122_apdu_hdr {
460 u8 class;
461 u8 ins;
462 u8 p1;
463 u8 p2;
464 } __packed;
465
466 struct 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
473 struct pn533_acr122_rx_frame {
474 struct pn533_acr122_ccid_hdr ccid;
475 u8 data[]; /* pn533 frame : TFI ... */
476 } __packed;
477
478 static 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
501 static 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
508 static 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
515 static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
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
528 static 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
536 static u8 pn533_acr122_get_cmd_code(void *frame)
537 {
538 struct pn533_acr122_rx_frame *f = frame;
539
540 return PN533_FRAME_CMD(f);
541 }
542
543 static 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
559 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
560 static inline u8 pn533_ext_checksum(u16 value)
561 {
562 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
563 }
564
565 /* The rule: value + checksum = 0 */
566 static inline u8 pn533_std_checksum(u8 value)
567 {
568 return ~value + 1;
569 }
570
571 /* The rule: sum(data elements) + checksum = 0 */
572 static u8 pn533_std_data_checksum(u8 *data, int datalen)
573 {
574 u8 sum = 0;
575 int i;
576
577 for (i = 0; i < datalen; i++)
578 sum += data[i];
579
580 return pn533_std_checksum(sum);
581 }
582
583 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
584 {
585 struct pn533_std_frame *frame = _frame;
586
587 frame->preamble = 0;
588 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
589 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
590 PN533_FRAME_CMD(frame) = cmd_code;
591 frame->datalen = 2;
592 }
593
594 static void pn533_std_tx_frame_finish(void *_frame)
595 {
596 struct pn533_std_frame *frame = _frame;
597
598 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
599
600 PN533_STD_FRAME_CHECKSUM(frame) =
601 pn533_std_data_checksum(frame->data, frame->datalen);
602
603 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
604 }
605
606 static void pn533_std_tx_update_payload_len(void *_frame, int len)
607 {
608 struct pn533_std_frame *frame = _frame;
609
610 frame->datalen += len;
611 }
612
613 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
614 {
615 u8 checksum;
616 struct pn533_std_frame *stdf = _frame;
617
618 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
619 return false;
620
621 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
622 /* Standard frame code */
623 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
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
636 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
637
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 }
648
649 return true;
650 }
651
652 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
653 {
654 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
655 return false;
656
657 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
658 return false;
659
660 return true;
661 }
662
663 static inline int pn533_std_rx_frame_size(void *frame)
664 {
665 struct pn533_std_frame *f = frame;
666
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
675 return sizeof(struct pn533_std_frame) + f->datalen +
676 PN533_STD_FRAME_TAIL_LEN;
677 }
678
679 static u8 pn533_std_get_cmd_code(void *frame)
680 {
681 struct pn533_std_frame *f = frame;
682 struct pn533_ext_frame *eif = frame;
683
684 if (PN533_STD_IS_EXTENDED(f))
685 return PN533_FRAME_CMD(eif);
686 else
687 return PN533_FRAME_CMD(f);
688 }
689
690 static struct pn533_frame_ops pn533_std_frame_ops = {
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,
704 };
705
706 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
707 {
708 return (dev->ops->get_cmd_code(frame) ==
709 PN533_CMD_RESPONSE(dev->cmd->code));
710 }
711
712 static void pn533_recv_response(struct urb *urb)
713 {
714 struct pn533 *dev = urb->context;
715 struct pn533_cmd *cmd = dev->cmd;
716 u8 *in_frame;
717
718 cmd->status = urb->status;
719
720 switch (urb->status) {
721 case 0:
722 break; /* success */
723 case -ECONNRESET:
724 case -ENOENT:
725 nfc_dev_dbg(&dev->interface->dev,
726 "The urb has been canceled (status %d)",
727 urb->status);
728 goto sched_wq;
729 case -ESHUTDOWN:
730 default:
731 nfc_dev_err(&dev->interface->dev,
732 "Urb failure (status %d)", urb->status);
733 goto sched_wq;
734 }
735
736 in_frame = dev->in_urb->transfer_buffer;
737
738 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
739 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
740 dev->ops->rx_frame_size(in_frame), false);
741
742 if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
743 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
744 cmd->status = -EIO;
745 goto sched_wq;
746 }
747
748 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
749 nfc_dev_err(&dev->interface->dev,
750 "It it not the response to the last command");
751 cmd->status = -EIO;
752 goto sched_wq;
753 }
754
755 sched_wq:
756 queue_work(dev->wq, &dev->cmd_complete_work);
757 }
758
759 static 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
766 static void pn533_recv_ack(struct urb *urb)
767 {
768 struct pn533 *dev = urb->context;
769 struct pn533_cmd *cmd = dev->cmd;
770 struct pn533_std_frame *in_frame;
771 int rc;
772
773 cmd->status = urb->status;
774
775 switch (urb->status) {
776 case 0:
777 break; /* success */
778 case -ECONNRESET:
779 case -ENOENT:
780 nfc_dev_dbg(&dev->interface->dev,
781 "The urb has been stopped (status %d)",
782 urb->status);
783 goto sched_wq;
784 case -ESHUTDOWN:
785 default:
786 nfc_dev_err(&dev->interface->dev,
787 "Urb failure (status %d)", urb->status);
788 goto sched_wq;
789 }
790
791 in_frame = dev->in_urb->transfer_buffer;
792
793 if (!pn533_std_rx_frame_is_ack(in_frame)) {
794 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
795 cmd->status = -EIO;
796 goto sched_wq;
797 }
798
799 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
800 if (rc) {
801 nfc_dev_err(&dev->interface->dev,
802 "usb_submit_urb failed with result %d", rc);
803 cmd->status = rc;
804 goto sched_wq;
805 }
806
807 return;
808
809 sched_wq:
810 queue_work(dev->wq, &dev->cmd_complete_work);
811 }
812
813 static 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
820 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
821 {
822 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
823 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
824 int rc;
825
826 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
827
828 dev->out_urb->transfer_buffer = ack;
829 dev->out_urb->transfer_buffer_length = sizeof(ack);
830 rc = usb_submit_urb(dev->out_urb, flags);
831
832 return rc;
833 }
834
835 static int __pn533_send_frame_async(struct pn533 *dev,
836 struct sk_buff *out,
837 struct sk_buff *in,
838 int in_len)
839 {
840 int rc;
841
842 dev->out_urb->transfer_buffer = out->data;
843 dev->out_urb->transfer_buffer_length = out->len;
844
845 dev->in_urb->transfer_buffer = in->data;
846 dev->in_urb->transfer_buffer_length = in_len;
847
848 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
849 out->data, out->len, false);
850
851 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
852 if (rc)
853 return rc;
854
855 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
856 /* request for response for sent packet directly */
857 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
858 if (rc)
859 goto error;
860 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
861 /* request for ACK if that's the case */
862 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
863 if (rc)
864 goto error;
865 }
866
867 return 0;
868
869 error:
870 usb_unlink_urb(dev->out_urb);
871 return rc;
872 }
873
874 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
875 struct sk_buff *skb)
876 {
877 /* payload is already there, just update datalen */
878 int payload_len = skb->len;
879 struct pn533_frame_ops *ops = dev->ops;
880
881
882 skb_push(skb, ops->tx_header_len);
883 skb_put(skb, ops->tx_tail_len);
884
885 ops->tx_frame_init(skb->data, cmd_code);
886 ops->tx_update_payload_len(skb->data, payload_len);
887 ops->tx_frame_finish(skb->data);
888 }
889
890 static int pn533_send_async_complete(struct pn533 *dev)
891 {
892 struct pn533_cmd *cmd = dev->cmd;
893 int status = cmd->status;
894
895 struct sk_buff *req = cmd->req;
896 struct sk_buff *resp = cmd->resp;
897
898 int rc;
899
900 dev_kfree_skb(req);
901
902 if (status < 0) {
903 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
904 ERR_PTR(status));
905 dev_kfree_skb(resp);
906 goto done;
907 }
908
909 skb_put(resp, dev->ops->rx_frame_size(resp->data));
910 skb_pull(resp, dev->ops->rx_header_len);
911 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
912
913 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
914
915 done:
916 kfree(cmd);
917 dev->cmd = NULL;
918 return rc;
919 }
920
921 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
922 struct sk_buff *req, struct sk_buff *resp,
923 int resp_len,
924 pn533_send_async_complete_t complete_cb,
925 void *complete_cb_context)
926 {
927 struct pn533_cmd *cmd;
928 int rc = 0;
929
930 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
931
932 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
933 if (!cmd)
934 return -ENOMEM;
935
936 cmd->code = cmd_code;
937 cmd->req = req;
938 cmd->resp = resp;
939 cmd->resp_len = resp_len;
940 cmd->complete_cb = complete_cb;
941 cmd->complete_cb_context = complete_cb_context;
942
943 pn533_build_cmd_frame(dev, cmd_code, req);
944
945 mutex_lock(&dev->cmd_lock);
946
947 if (!dev->cmd_pending) {
948 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
949 if (rc)
950 goto error;
951
952 dev->cmd_pending = 1;
953 dev->cmd = cmd;
954 goto unlock;
955 }
956
957 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
958 cmd_code);
959
960 INIT_LIST_HEAD(&cmd->queue);
961 list_add_tail(&cmd->queue, &dev->cmd_queue);
962
963 goto unlock;
964
965 error:
966 kfree(cmd);
967 unlock:
968 mutex_unlock(&dev->cmd_lock);
969 return rc;
970 }
971
972 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
973 struct sk_buff *req,
974 pn533_send_async_complete_t complete_cb,
975 void *complete_cb_context)
976 {
977 struct sk_buff *resp;
978 int rc;
979 int resp_len = dev->ops->rx_header_len +
980 dev->ops->max_payload_len +
981 dev->ops->rx_tail_len;
982
983 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
984 if (!resp)
985 return -ENOMEM;
986
987 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
988 complete_cb_context);
989 if (rc)
990 dev_kfree_skb(resp);
991
992 return rc;
993 }
994
995 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
996 struct sk_buff *req,
997 pn533_send_async_complete_t complete_cb,
998 void *complete_cb_context)
999 {
1000 struct sk_buff *resp;
1001 int rc;
1002 int resp_len = dev->ops->rx_header_len +
1003 dev->ops->max_payload_len +
1004 dev->ops->rx_tail_len;
1005
1006 resp = alloc_skb(resp_len, GFP_KERNEL);
1007 if (!resp)
1008 return -ENOMEM;
1009
1010 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
1011 complete_cb_context);
1012 if (rc)
1013 dev_kfree_skb(resp);
1014
1015 return rc;
1016 }
1017
1018 /*
1019 * pn533_send_cmd_direct_async
1020 *
1021 * The function sends a piority cmd directly to the chip omiting the cmd
1022 * queue. It's intended to be used by chaining mechanism of received responses
1023 * where the host has to request every single chunk of data before scheduling
1024 * next cmd from the queue.
1025 */
1026 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
1027 struct sk_buff *req,
1028 pn533_send_async_complete_t complete_cb,
1029 void *complete_cb_context)
1030 {
1031 struct sk_buff *resp;
1032 struct pn533_cmd *cmd;
1033 int rc;
1034 int resp_len = dev->ops->rx_header_len +
1035 dev->ops->max_payload_len +
1036 dev->ops->rx_tail_len;
1037
1038 resp = alloc_skb(resp_len, GFP_KERNEL);
1039 if (!resp)
1040 return -ENOMEM;
1041
1042 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1043 if (!cmd) {
1044 dev_kfree_skb(resp);
1045 return -ENOMEM;
1046 }
1047
1048 cmd->code = cmd_code;
1049 cmd->req = req;
1050 cmd->resp = resp;
1051 cmd->resp_len = resp_len;
1052 cmd->complete_cb = complete_cb;
1053 cmd->complete_cb_context = complete_cb_context;
1054
1055 pn533_build_cmd_frame(dev, cmd_code, req);
1056
1057 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
1058 if (rc < 0) {
1059 dev_kfree_skb(resp);
1060 kfree(cmd);
1061 } else {
1062 dev->cmd = cmd;
1063 }
1064
1065 return rc;
1066 }
1067
1068 static void pn533_wq_cmd_complete(struct work_struct *work)
1069 {
1070 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1071 int rc;
1072
1073 rc = pn533_send_async_complete(dev);
1074 if (rc != -EINPROGRESS)
1075 queue_work(dev->wq, &dev->cmd_work);
1076 }
1077
1078 static void pn533_wq_cmd(struct work_struct *work)
1079 {
1080 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1081 struct pn533_cmd *cmd;
1082 int rc;
1083
1084 mutex_lock(&dev->cmd_lock);
1085
1086 if (list_empty(&dev->cmd_queue)) {
1087 dev->cmd_pending = 0;
1088 mutex_unlock(&dev->cmd_lock);
1089 return;
1090 }
1091
1092 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1093
1094 list_del(&cmd->queue);
1095
1096 mutex_unlock(&dev->cmd_lock);
1097
1098 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1099 if (rc < 0) {
1100 dev_kfree_skb(cmd->req);
1101 dev_kfree_skb(cmd->resp);
1102 kfree(cmd);
1103 return;
1104 }
1105
1106 dev->cmd = cmd;
1107 }
1108
1109 struct pn533_sync_cmd_response {
1110 struct sk_buff *resp;
1111 struct completion done;
1112 };
1113
1114 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1115 struct sk_buff *resp)
1116 {
1117 struct pn533_sync_cmd_response *arg = _arg;
1118
1119 arg->resp = resp;
1120 complete(&arg->done);
1121
1122 return 0;
1123 }
1124
1125 /* pn533_send_cmd_sync
1126 *
1127 * Please note the req parameter is freed inside the function to
1128 * limit a number of return value interpretations by the caller.
1129 *
1130 * 1. negative in case of error during TX path -> req should be freed
1131 *
1132 * 2. negative in case of error during RX path -> req should not be freed
1133 * as it's been already freed at the begining of RX path by
1134 * async_complete_cb.
1135 *
1136 * 3. valid pointer in case of succesfult RX path
1137 *
1138 * A caller has to check a return value with IS_ERR macro. If the test pass,
1139 * the returned pointer is valid.
1140 *
1141 * */
1142 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1143 struct sk_buff *req)
1144 {
1145 int rc;
1146 struct pn533_sync_cmd_response arg;
1147
1148 init_completion(&arg.done);
1149
1150 rc = pn533_send_cmd_async(dev, cmd_code, req,
1151 pn533_send_sync_complete, &arg);
1152 if (rc) {
1153 dev_kfree_skb(req);
1154 return ERR_PTR(rc);
1155 }
1156
1157 wait_for_completion(&arg.done);
1158
1159 return arg.resp;
1160 }
1161
1162 static void pn533_send_complete(struct urb *urb)
1163 {
1164 struct pn533 *dev = urb->context;
1165
1166 switch (urb->status) {
1167 case 0:
1168 break; /* success */
1169 case -ECONNRESET:
1170 case -ENOENT:
1171 nfc_dev_dbg(&dev->interface->dev,
1172 "The urb has been stopped (status %d)",
1173 urb->status);
1174 break;
1175 case -ESHUTDOWN:
1176 default:
1177 nfc_dev_err(&dev->interface->dev,
1178 "Urb failure (status %d)", urb->status);
1179 }
1180 }
1181
1182 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1183 {
1184 /* ACR122U does not support any command which aborts last
1185 * issued command i.e. as ACK for standard PN533. Additionally,
1186 * it behaves stange, sending broken or incorrect responses,
1187 * when we cancel urb before the chip will send response.
1188 */
1189 if (dev->device_type == PN533_DEVICE_ACR122U)
1190 return;
1191
1192 /* An ack will cancel the last issued command */
1193 pn533_send_ack(dev, flags);
1194
1195 /* cancel the urb request */
1196 usb_kill_urb(dev->in_urb);
1197 }
1198
1199 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1200 {
1201 struct sk_buff *skb;
1202
1203 skb = alloc_skb(dev->ops->tx_header_len +
1204 size +
1205 dev->ops->tx_tail_len, GFP_KERNEL);
1206
1207 if (skb)
1208 skb_reserve(skb, dev->ops->tx_header_len);
1209
1210 return skb;
1211 }
1212
1213 struct pn533_target_type_a {
1214 __be16 sens_res;
1215 u8 sel_res;
1216 u8 nfcid_len;
1217 u8 nfcid_data[];
1218 } __packed;
1219
1220
1221 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1222 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1223 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1224
1225 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1226 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1227
1228 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1229 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1230
1231 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1232 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1233 #define PN533_TYPE_A_SEL_PROT_DEP 2
1234 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1235
1236 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1237 int target_data_len)
1238 {
1239 u8 ssd;
1240 u8 platconf;
1241
1242 if (target_data_len < sizeof(struct pn533_target_type_a))
1243 return false;
1244
1245 /* The lenght check of nfcid[] and ats[] are not being performed because
1246 the values are not being used */
1247
1248 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1249 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1250 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1251
1252 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1253 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1254 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1255 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1256 return false;
1257
1258 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1259 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1260 return false;
1261
1262 return true;
1263 }
1264
1265 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1266 int tgt_data_len)
1267 {
1268 struct pn533_target_type_a *tgt_type_a;
1269
1270 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1271
1272 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1273 return -EPROTO;
1274
1275 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1276 case PN533_TYPE_A_SEL_PROT_MIFARE:
1277 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1278 break;
1279 case PN533_TYPE_A_SEL_PROT_ISO14443:
1280 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1281 break;
1282 case PN533_TYPE_A_SEL_PROT_DEP:
1283 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1284 break;
1285 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1286 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1287 NFC_PROTO_NFC_DEP_MASK;
1288 break;
1289 }
1290
1291 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1292 nfc_tgt->sel_res = tgt_type_a->sel_res;
1293 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1294 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1295
1296 return 0;
1297 }
1298
1299 struct pn533_target_felica {
1300 u8 pol_res;
1301 u8 opcode;
1302 u8 nfcid2[NFC_NFCID2_MAXSIZE];
1303 u8 pad[8];
1304 /* optional */
1305 u8 syst_code[];
1306 } __packed;
1307
1308 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1309 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1310
1311 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1312 int target_data_len)
1313 {
1314 if (target_data_len < sizeof(struct pn533_target_felica))
1315 return false;
1316
1317 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1318 return false;
1319
1320 return true;
1321 }
1322
1323 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1324 int tgt_data_len)
1325 {
1326 struct pn533_target_felica *tgt_felica;
1327
1328 tgt_felica = (struct pn533_target_felica *)tgt_data;
1329
1330 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1331 return -EPROTO;
1332
1333 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1334 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1335 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1336 else
1337 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1338
1339 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1340 nfc_tgt->sensf_res_len = 9;
1341
1342 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1343 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1344
1345 return 0;
1346 }
1347
1348 struct pn533_target_jewel {
1349 __be16 sens_res;
1350 u8 jewelid[4];
1351 } __packed;
1352
1353 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1354 int target_data_len)
1355 {
1356 u8 ssd;
1357 u8 platconf;
1358
1359 if (target_data_len < sizeof(struct pn533_target_jewel))
1360 return false;
1361
1362 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1363 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1364 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1365
1366 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1367 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1368 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1369 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1370 return false;
1371
1372 return true;
1373 }
1374
1375 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1376 int tgt_data_len)
1377 {
1378 struct pn533_target_jewel *tgt_jewel;
1379
1380 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1381
1382 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1383 return -EPROTO;
1384
1385 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1386 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1387 nfc_tgt->nfcid1_len = 4;
1388 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1389
1390 return 0;
1391 }
1392
1393 struct pn533_type_b_prot_info {
1394 u8 bitrate;
1395 u8 fsci_type;
1396 u8 fwi_adc_fo;
1397 } __packed;
1398
1399 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1400 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1401 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1402
1403 struct pn533_type_b_sens_res {
1404 u8 opcode;
1405 u8 nfcid[4];
1406 u8 appdata[4];
1407 struct pn533_type_b_prot_info prot_info;
1408 } __packed;
1409
1410 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1411
1412 struct pn533_target_type_b {
1413 struct pn533_type_b_sens_res sensb_res;
1414 u8 attrib_res_len;
1415 u8 attrib_res[];
1416 } __packed;
1417
1418 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1419 int target_data_len)
1420 {
1421 if (target_data_len < sizeof(struct pn533_target_type_b))
1422 return false;
1423
1424 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1425 return false;
1426
1427 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1428 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1429 return false;
1430
1431 return true;
1432 }
1433
1434 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1435 int tgt_data_len)
1436 {
1437 struct pn533_target_type_b *tgt_type_b;
1438
1439 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1440
1441 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1442 return -EPROTO;
1443
1444 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1445
1446 return 0;
1447 }
1448
1449 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1450 int tgdata_len)
1451 {
1452 struct nfc_target nfc_tgt;
1453 int rc;
1454
1455 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1456 dev->poll_mod_curr);
1457
1458 if (tg != 1)
1459 return -EPROTO;
1460
1461 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1462
1463 switch (dev->poll_mod_curr) {
1464 case PN533_POLL_MOD_106KBPS_A:
1465 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1466 break;
1467 case PN533_POLL_MOD_212KBPS_FELICA:
1468 case PN533_POLL_MOD_424KBPS_FELICA:
1469 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1470 break;
1471 case PN533_POLL_MOD_106KBPS_JEWEL:
1472 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1473 break;
1474 case PN533_POLL_MOD_847KBPS_B:
1475 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1476 break;
1477 default:
1478 nfc_dev_err(&dev->interface->dev,
1479 "Unknown current poll modulation");
1480 return -EPROTO;
1481 }
1482
1483 if (rc)
1484 return rc;
1485
1486 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1487 nfc_dev_dbg(&dev->interface->dev,
1488 "The Tg found doesn't have the desired protocol");
1489 return -EAGAIN;
1490 }
1491
1492 nfc_dev_dbg(&dev->interface->dev,
1493 "Target found - supported protocols: 0x%x",
1494 nfc_tgt.supported_protocols);
1495
1496 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1497
1498 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1499
1500 return 0;
1501 }
1502
1503 static inline void pn533_poll_next_mod(struct pn533 *dev)
1504 {
1505 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1506 }
1507
1508 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1509 {
1510 dev->poll_mod_count = 0;
1511 }
1512
1513 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1514 {
1515 dev->poll_mod_active[dev->poll_mod_count] =
1516 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1517 dev->poll_mod_count++;
1518 }
1519
1520 static void pn533_poll_create_mod_list(struct pn533 *dev,
1521 u32 im_protocols, u32 tm_protocols)
1522 {
1523 pn533_poll_reset_mod_list(dev);
1524
1525 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1526 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1527 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1528 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1529
1530 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1531 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1532 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1533 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1534 }
1535
1536 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1537 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1538
1539 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1540 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1541
1542 if (tm_protocols)
1543 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1544 }
1545
1546 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1547 {
1548 u8 nbtg, tg, *tgdata;
1549 int rc, tgdata_len;
1550
1551 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1552
1553 nbtg = resp->data[0];
1554 tg = resp->data[1];
1555 tgdata = &resp->data[2];
1556 tgdata_len = resp->len - 2; /* nbtg + tg */
1557
1558 if (nbtg) {
1559 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1560
1561 /* We must stop the poll after a valid target found */
1562 if (rc == 0) {
1563 pn533_poll_reset_mod_list(dev);
1564 return 0;
1565 }
1566 }
1567
1568 return -EAGAIN;
1569 }
1570
1571 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1572 {
1573 struct sk_buff *skb;
1574 u8 *felica, *nfcid3, *gb;
1575
1576 u8 *gbytes = dev->gb;
1577 size_t gbytes_len = dev->gb_len;
1578
1579 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1580 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1581 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1582 0xff, 0xff}; /* System code */
1583
1584 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1585 0x0, 0x0, 0x0,
1586 0x40}; /* SEL_RES for DEP */
1587
1588 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1589 felica (18), nfcid3 (10), gb_len (1) */
1590 gbytes_len +
1591 1; /* len Tk*/
1592
1593 skb = pn533_alloc_skb(dev, skb_len);
1594 if (!skb)
1595 return NULL;
1596
1597 /* DEP support only */
1598 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1599
1600 /* MIFARE params */
1601 memcpy(skb_put(skb, 6), mifare_params, 6);
1602
1603 /* Felica params */
1604 felica = skb_put(skb, 18);
1605 memcpy(felica, felica_params, 18);
1606 get_random_bytes(felica + 2, 6);
1607
1608 /* NFCID3 */
1609 nfcid3 = skb_put(skb, 10);
1610 memset(nfcid3, 0, 10);
1611 memcpy(nfcid3, felica, 8);
1612
1613 /* General bytes */
1614 *skb_put(skb, 1) = gbytes_len;
1615
1616 gb = skb_put(skb, gbytes_len);
1617 memcpy(gb, gbytes, gbytes_len);
1618
1619 /* Len Tk */
1620 *skb_put(skb, 1) = 0;
1621
1622 return skb;
1623 }
1624
1625 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1626 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1627 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1628 struct sk_buff *resp)
1629 {
1630 u8 status;
1631
1632 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1633
1634 if (IS_ERR(resp))
1635 return PTR_ERR(resp);
1636
1637 status = resp->data[0];
1638 skb_pull(resp, sizeof(status));
1639
1640 if (status != 0) {
1641 nfc_tm_deactivated(dev->nfc_dev);
1642 dev->tgt_mode = 0;
1643 dev_kfree_skb(resp);
1644 return 0;
1645 }
1646
1647 return nfc_tm_data_received(dev->nfc_dev, resp);
1648 }
1649
1650 static void pn533_wq_tg_get_data(struct work_struct *work)
1651 {
1652 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1653
1654 struct sk_buff *skb;
1655 int rc;
1656
1657 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1658
1659 skb = pn533_alloc_skb(dev, 0);
1660 if (!skb)
1661 return;
1662
1663 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1664 pn533_tm_get_data_complete, NULL);
1665
1666 if (rc < 0)
1667 dev_kfree_skb(skb);
1668
1669 return;
1670 }
1671
1672 #define ATR_REQ_GB_OFFSET 17
1673 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1674 {
1675 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1676 size_t gb_len;
1677 int rc;
1678
1679 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1680
1681 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1682 return -EINVAL;
1683
1684 mode = resp->data[0];
1685 cmd = &resp->data[1];
1686
1687 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1688 mode, resp->len);
1689
1690 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1691 PN533_INIT_TARGET_RESP_ACTIVE)
1692 comm_mode = NFC_COMM_ACTIVE;
1693
1694 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1695 return -EOPNOTSUPP;
1696
1697 gb = cmd + ATR_REQ_GB_OFFSET;
1698 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1699
1700 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1701 comm_mode, gb, gb_len);
1702 if (rc < 0) {
1703 nfc_dev_err(&dev->interface->dev,
1704 "Error when signaling target activation");
1705 return rc;
1706 }
1707
1708 dev->tgt_mode = 1;
1709 queue_work(dev->wq, &dev->tg_work);
1710
1711 return 0;
1712 }
1713
1714 static void pn533_listen_mode_timer(unsigned long data)
1715 {
1716 struct pn533 *dev = (struct pn533 *)data;
1717
1718 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1719
1720 dev->cancel_listen = 1;
1721
1722 pn533_poll_next_mod(dev);
1723
1724 queue_delayed_work(dev->wq, &dev->poll_work,
1725 msecs_to_jiffies(PN533_POLL_INTERVAL));
1726 }
1727
1728 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1729 struct sk_buff *resp)
1730 {
1731 int rc = 0;
1732
1733 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1734
1735 if (IS_ERR(resp)) {
1736 rc = PTR_ERR(resp);
1737
1738 nfc_dev_err(&dev->interface->dev, "%s RF setting error %d",
1739 __func__, rc);
1740
1741 return rc;
1742 }
1743
1744 queue_delayed_work(dev->wq, &dev->poll_work,
1745 msecs_to_jiffies(PN533_POLL_INTERVAL));
1746
1747 dev_kfree_skb(resp);
1748 return rc;
1749 }
1750
1751 static void pn533_wq_rf(struct work_struct *work)
1752 {
1753 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1754 struct sk_buff *skb;
1755 int rc;
1756
1757 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1758
1759 skb = pn533_alloc_skb(dev, 2);
1760 if (!skb)
1761 return;
1762
1763 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
1764 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
1765
1766 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1767 pn533_rf_complete, NULL);
1768 if (rc < 0) {
1769 dev_kfree_skb(skb);
1770 nfc_dev_err(&dev->interface->dev, "RF setting error %d", rc);
1771 }
1772
1773 return;
1774 }
1775
1776 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1777 struct sk_buff *resp)
1778 {
1779 struct pn533_poll_modulations *cur_mod;
1780 int rc;
1781
1782 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1783
1784 if (IS_ERR(resp)) {
1785 rc = PTR_ERR(resp);
1786
1787 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1788 __func__, rc);
1789
1790 if (rc == -ENOENT) {
1791 if (dev->poll_mod_count != 0)
1792 return rc;
1793 else
1794 goto stop_poll;
1795 } else if (rc < 0) {
1796 nfc_dev_err(&dev->interface->dev,
1797 "Error %d when running poll", rc);
1798 goto stop_poll;
1799 }
1800 }
1801
1802 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1803
1804 if (cur_mod->len == 0) { /* Target mode */
1805 del_timer(&dev->listen_timer);
1806 rc = pn533_init_target_complete(dev, resp);
1807 goto done;
1808 }
1809
1810 /* Initiator mode */
1811 rc = pn533_start_poll_complete(dev, resp);
1812 if (!rc)
1813 goto done;
1814
1815 if (!dev->poll_mod_count) {
1816 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
1817 goto done;
1818 }
1819
1820 pn533_poll_next_mod(dev);
1821 /* Not target found, turn radio off */
1822 queue_work(dev->wq, &dev->rf_work);
1823
1824 done:
1825 dev_kfree_skb(resp);
1826 return rc;
1827
1828 stop_poll:
1829 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1830
1831 pn533_poll_reset_mod_list(dev);
1832 dev->poll_protocols = 0;
1833 return rc;
1834 }
1835
1836 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1837 struct pn533_poll_modulations *mod)
1838 {
1839 struct sk_buff *skb;
1840
1841 skb = pn533_alloc_skb(dev, mod->len);
1842 if (!skb)
1843 return NULL;
1844
1845 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1846
1847 return skb;
1848 }
1849
1850 static int pn533_send_poll_frame(struct pn533 *dev)
1851 {
1852 struct pn533_poll_modulations *mod;
1853 struct sk_buff *skb;
1854 int rc;
1855 u8 cmd_code;
1856
1857 mod = dev->poll_mod_active[dev->poll_mod_curr];
1858
1859 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1860 __func__, mod->len);
1861
1862 if (mod->len == 0) { /* Listen mode */
1863 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1864 skb = pn533_alloc_poll_tg_frame(dev);
1865 } else { /* Polling mode */
1866 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1867 skb = pn533_alloc_poll_in_frame(dev, mod);
1868 }
1869
1870 if (!skb) {
1871 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1872 return -ENOMEM;
1873 }
1874
1875 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1876 NULL);
1877 if (rc < 0) {
1878 dev_kfree_skb(skb);
1879 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1880 }
1881
1882 return rc;
1883 }
1884
1885 static void pn533_wq_poll(struct work_struct *work)
1886 {
1887 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1888 struct pn533_poll_modulations *cur_mod;
1889 int rc;
1890
1891 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1892
1893 nfc_dev_dbg(&dev->interface->dev,
1894 "%s cancel_listen %d modulation len %d",
1895 __func__, dev->cancel_listen, cur_mod->len);
1896
1897 if (dev->cancel_listen == 1) {
1898 dev->cancel_listen = 0;
1899 pn533_abort_cmd(dev, GFP_ATOMIC);
1900 }
1901
1902 rc = pn533_send_poll_frame(dev);
1903 if (rc)
1904 return;
1905
1906 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1907 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1908
1909 return;
1910 }
1911
1912 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1913 u32 im_protocols, u32 tm_protocols)
1914 {
1915 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1916 u8 rand_mod;
1917
1918 nfc_dev_dbg(&dev->interface->dev,
1919 "%s: im protocols 0x%x tm protocols 0x%x",
1920 __func__, im_protocols, tm_protocols);
1921
1922 if (dev->tgt_active_prot) {
1923 nfc_dev_err(&dev->interface->dev,
1924 "Cannot poll with a target already activated");
1925 return -EBUSY;
1926 }
1927
1928 if (dev->tgt_mode) {
1929 nfc_dev_err(&dev->interface->dev,
1930 "Cannot poll while already being activated");
1931 return -EBUSY;
1932 }
1933
1934 if (tm_protocols) {
1935 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1936 if (dev->gb == NULL)
1937 tm_protocols = 0;
1938 }
1939
1940 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1941 dev->poll_protocols = im_protocols;
1942 dev->listen_protocols = tm_protocols;
1943
1944 /* Do not always start polling from the same modulation */
1945 get_random_bytes(&rand_mod, sizeof(rand_mod));
1946 rand_mod %= dev->poll_mod_count;
1947 dev->poll_mod_curr = rand_mod;
1948
1949 return pn533_send_poll_frame(dev);
1950 }
1951
1952 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1953 {
1954 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1955
1956 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1957
1958 del_timer(&dev->listen_timer);
1959
1960 if (!dev->poll_mod_count) {
1961 nfc_dev_dbg(&dev->interface->dev,
1962 "Polling operation was not running");
1963 return;
1964 }
1965
1966 pn533_abort_cmd(dev, GFP_KERNEL);
1967 flush_delayed_work(&dev->poll_work);
1968 pn533_poll_reset_mod_list(dev);
1969 }
1970
1971 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1972 {
1973 struct pn533_cmd_activate_response *rsp;
1974 u16 gt_len;
1975 int rc;
1976
1977 struct sk_buff *skb;
1978 struct sk_buff *resp;
1979
1980 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1981
1982 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1983 if (!skb)
1984 return -ENOMEM;
1985
1986 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1987 *skb_put(skb, sizeof(u8)) = 0; /* Next */
1988
1989 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1990 if (IS_ERR(resp))
1991 return PTR_ERR(resp);
1992
1993 rsp = (struct pn533_cmd_activate_response *)resp->data;
1994 rc = rsp->status & PN533_CMD_RET_MASK;
1995 if (rc != PN533_CMD_RET_SUCCESS) {
1996 nfc_dev_err(&dev->interface->dev,
1997 "Target activation failed (error 0x%x)", rc);
1998 dev_kfree_skb(resp);
1999 return -EIO;
2000 }
2001
2002 /* ATR_RES general bytes are located at offset 16 */
2003 gt_len = resp->len - 16;
2004 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
2005
2006 dev_kfree_skb(resp);
2007 return rc;
2008 }
2009
2010 static int pn533_activate_target(struct nfc_dev *nfc_dev,
2011 struct nfc_target *target, u32 protocol)
2012 {
2013 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2014 int rc;
2015
2016 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
2017 protocol);
2018
2019 if (dev->poll_mod_count) {
2020 nfc_dev_err(&dev->interface->dev,
2021 "Cannot activate while polling");
2022 return -EBUSY;
2023 }
2024
2025 if (dev->tgt_active_prot) {
2026 nfc_dev_err(&dev->interface->dev,
2027 "There is already an active target");
2028 return -EBUSY;
2029 }
2030
2031 if (!dev->tgt_available_prots) {
2032 nfc_dev_err(&dev->interface->dev,
2033 "There is no available target to activate");
2034 return -EINVAL;
2035 }
2036
2037 if (!(dev->tgt_available_prots & (1 << protocol))) {
2038 nfc_dev_err(&dev->interface->dev,
2039 "Target doesn't support requested proto %u",
2040 protocol);
2041 return -EINVAL;
2042 }
2043
2044 if (protocol == NFC_PROTO_NFC_DEP) {
2045 rc = pn533_activate_target_nfcdep(dev);
2046 if (rc) {
2047 nfc_dev_err(&dev->interface->dev,
2048 "Activating target with DEP failed %d", rc);
2049 return rc;
2050 }
2051 }
2052
2053 dev->tgt_active_prot = protocol;
2054 dev->tgt_available_prots = 0;
2055
2056 return 0;
2057 }
2058
2059 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
2060 struct nfc_target *target)
2061 {
2062 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2063
2064 struct sk_buff *skb;
2065 struct sk_buff *resp;
2066
2067 int rc;
2068
2069 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2070
2071 if (!dev->tgt_active_prot) {
2072 nfc_dev_err(&dev->interface->dev, "There is no active target");
2073 return;
2074 }
2075
2076 dev->tgt_active_prot = 0;
2077 skb_queue_purge(&dev->resp_q);
2078
2079 skb = pn533_alloc_skb(dev, sizeof(u8));
2080 if (!skb)
2081 return;
2082
2083 *skb_put(skb, 1) = 1; /* TG*/
2084
2085 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2086 if (IS_ERR(resp))
2087 return;
2088
2089 rc = resp->data[0] & PN533_CMD_RET_MASK;
2090 if (rc != PN533_CMD_RET_SUCCESS)
2091 nfc_dev_err(&dev->interface->dev,
2092 "Error 0x%x when releasing the target", rc);
2093
2094 dev_kfree_skb(resp);
2095 return;
2096 }
2097
2098
2099 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
2100 struct sk_buff *resp)
2101 {
2102 struct pn533_cmd_jump_dep_response *rsp;
2103 u8 target_gt_len;
2104 int rc;
2105 u8 active = *(u8 *)arg;
2106
2107 kfree(arg);
2108
2109 if (IS_ERR(resp))
2110 return PTR_ERR(resp);
2111
2112 if (dev->tgt_available_prots &&
2113 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2114 nfc_dev_err(&dev->interface->dev,
2115 "The target does not support DEP");
2116 rc = -EINVAL;
2117 goto error;
2118 }
2119
2120 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2121
2122 rc = rsp->status & PN533_CMD_RET_MASK;
2123 if (rc != PN533_CMD_RET_SUCCESS) {
2124 nfc_dev_err(&dev->interface->dev,
2125 "Bringing DEP link up failed (error 0x%x)", rc);
2126 goto error;
2127 }
2128
2129 if (!dev->tgt_available_prots) {
2130 struct nfc_target nfc_target;
2131
2132 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2133
2134 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2135 nfc_target.nfcid1_len = 10;
2136 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2137 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2138 if (rc)
2139 goto error;
2140
2141 dev->tgt_available_prots = 0;
2142 }
2143
2144 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2145
2146 /* ATR_RES general bytes are located at offset 17 */
2147 target_gt_len = resp->len - 17;
2148 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2149 rsp->gt, target_gt_len);
2150 if (rc == 0)
2151 rc = nfc_dep_link_is_up(dev->nfc_dev,
2152 dev->nfc_dev->targets[0].idx,
2153 !active, NFC_RF_INITIATOR);
2154
2155 error:
2156 dev_kfree_skb(resp);
2157 return rc;
2158 }
2159
2160 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
2161 #define PASSIVE_DATA_LEN 5
2162 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2163 u8 comm_mode, u8 *gb, size_t gb_len)
2164 {
2165 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2166 struct sk_buff *skb;
2167 int rc, skb_len;
2168 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
2169
2170 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2171
2172 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2173
2174 if (dev->poll_mod_count) {
2175 nfc_dev_err(&dev->interface->dev,
2176 "Cannot bring the DEP link up while polling");
2177 return -EBUSY;
2178 }
2179
2180 if (dev->tgt_active_prot) {
2181 nfc_dev_err(&dev->interface->dev,
2182 "There is already an active target");
2183 return -EBUSY;
2184 }
2185
2186 skb_len = 3 + gb_len; /* ActPass + BR + Next */
2187 skb_len += PASSIVE_DATA_LEN;
2188
2189 /* NFCID3 */
2190 skb_len += NFC_NFCID3_MAXSIZE;
2191 if (target && !target->nfcid2_len) {
2192 nfcid3[0] = 0x1;
2193 nfcid3[1] = 0xfe;
2194 get_random_bytes(nfcid3 + 2, 6);
2195 }
2196
2197 skb = pn533_alloc_skb(dev, skb_len);
2198 if (!skb)
2199 return -ENOMEM;
2200
2201 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2202 *skb_put(skb, 1) = 0x02; /* 424 kbps */
2203
2204 next = skb_put(skb, 1); /* Next */
2205 *next = 0;
2206
2207 /* Copy passive data */
2208 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2209 *next |= 1;
2210
2211 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2212 if (target && target->nfcid2_len)
2213 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2214 target->nfcid2_len);
2215 else
2216 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2217 NFC_NFCID3_MAXSIZE);
2218 *next |= 2;
2219
2220 if (gb != NULL && gb_len > 0) {
2221 memcpy(skb_put(skb, gb_len), gb, gb_len);
2222 *next |= 4; /* We have some Gi */
2223 } else {
2224 *next = 0;
2225 }
2226
2227 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2228 if (!arg) {
2229 dev_kfree_skb(skb);
2230 return -ENOMEM;
2231 }
2232
2233 *arg = !comm_mode;
2234
2235 pn533_rf_field(dev->nfc_dev, 0);
2236
2237 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2238 pn533_in_dep_link_up_complete, arg);
2239
2240 if (rc < 0) {
2241 dev_kfree_skb(skb);
2242 kfree(arg);
2243 }
2244
2245 return rc;
2246 }
2247
2248 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2249 {
2250 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2251
2252 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2253
2254 pn533_poll_reset_mod_list(dev);
2255
2256 if (dev->tgt_mode || dev->tgt_active_prot)
2257 pn533_abort_cmd(dev, GFP_KERNEL);
2258
2259 dev->tgt_active_prot = 0;
2260 dev->tgt_mode = 0;
2261
2262 skb_queue_purge(&dev->resp_q);
2263
2264 return 0;
2265 }
2266
2267 struct pn533_data_exchange_arg {
2268 data_exchange_cb_t cb;
2269 void *cb_context;
2270 };
2271
2272 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2273 {
2274 struct sk_buff *skb, *tmp, *t;
2275 unsigned int skb_len = 0, tmp_len = 0;
2276
2277 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2278
2279 if (skb_queue_empty(&dev->resp_q))
2280 return NULL;
2281
2282 if (skb_queue_len(&dev->resp_q) == 1) {
2283 skb = skb_dequeue(&dev->resp_q);
2284 goto out;
2285 }
2286
2287 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2288 skb_len += tmp->len;
2289
2290 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2291 __func__, skb_len);
2292
2293 skb = alloc_skb(skb_len, GFP_KERNEL);
2294 if (skb == NULL)
2295 goto out;
2296
2297 skb_put(skb, skb_len);
2298
2299 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2300 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2301 tmp_len += tmp->len;
2302 }
2303
2304 out:
2305 skb_queue_purge(&dev->resp_q);
2306
2307 return skb;
2308 }
2309
2310 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2311 struct sk_buff *resp)
2312 {
2313 struct pn533_data_exchange_arg *arg = _arg;
2314 struct sk_buff *skb;
2315 int rc = 0;
2316 u8 status, ret, mi;
2317
2318 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2319
2320 if (IS_ERR(resp)) {
2321 rc = PTR_ERR(resp);
2322 goto _error;
2323 }
2324
2325 status = resp->data[0];
2326 ret = status & PN533_CMD_RET_MASK;
2327 mi = status & PN533_CMD_MI_MASK;
2328
2329 skb_pull(resp, sizeof(status));
2330
2331 if (ret != PN533_CMD_RET_SUCCESS) {
2332 nfc_dev_err(&dev->interface->dev,
2333 "Exchanging data failed (error 0x%x)", ret);
2334 rc = -EIO;
2335 goto error;
2336 }
2337
2338 skb_queue_tail(&dev->resp_q, resp);
2339
2340 if (mi) {
2341 dev->cmd_complete_mi_arg = arg;
2342 queue_work(dev->wq, &dev->mi_rx_work);
2343 return -EINPROGRESS;
2344 }
2345
2346 /* Prepare for the next round */
2347 if (skb_queue_len(&dev->fragment_skb) > 0) {
2348 dev->cmd_complete_dep_arg = arg;
2349 queue_work(dev->wq, &dev->mi_tx_work);
2350
2351 return -EINPROGRESS;
2352 }
2353
2354 skb = pn533_build_response(dev);
2355 if (!skb)
2356 goto error;
2357
2358 arg->cb(arg->cb_context, skb, 0);
2359 kfree(arg);
2360 return 0;
2361
2362 error:
2363 dev_kfree_skb(resp);
2364 _error:
2365 skb_queue_purge(&dev->resp_q);
2366 arg->cb(arg->cb_context, NULL, rc);
2367 kfree(arg);
2368 return rc;
2369 }
2370
2371 /* Split the Tx skb into small chunks */
2372 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2373 {
2374 struct sk_buff *frag;
2375 int frag_size;
2376
2377 do {
2378 /* Remaining size */
2379 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2380 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2381 else
2382 frag_size = skb->len;
2383
2384 /* Allocate and reserve */
2385 frag = pn533_alloc_skb(dev, frag_size);
2386 if (!frag) {
2387 skb_queue_purge(&dev->fragment_skb);
2388 break;
2389 }
2390
2391 /* Reserve the TG/MI byte */
2392 skb_reserve(frag, 1);
2393
2394 /* MI + TG */
2395 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2396 *skb_push(frag, sizeof(u8)) = (PN533_CMD_MI_MASK | 1);
2397 else
2398 *skb_push(frag, sizeof(u8)) = 1; /* TG */
2399
2400 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2401
2402 /* Reduce the size of incoming buffer */
2403 skb_pull(skb, frag_size);
2404
2405 /* Add this to skb_queue */
2406 skb_queue_tail(&dev->fragment_skb, frag);
2407
2408 } while (skb->len > 0);
2409
2410 dev_kfree_skb(skb);
2411
2412 return skb_queue_len(&dev->fragment_skb);
2413 }
2414
2415 static int pn533_transceive(struct nfc_dev *nfc_dev,
2416 struct nfc_target *target, struct sk_buff *skb,
2417 data_exchange_cb_t cb, void *cb_context)
2418 {
2419 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2420 struct pn533_data_exchange_arg *arg = NULL;
2421 int rc;
2422
2423 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2424
2425 if (!dev->tgt_active_prot) {
2426 nfc_dev_err(&dev->interface->dev,
2427 "Can't exchange data if there is no active target");
2428 rc = -EINVAL;
2429 goto error;
2430 }
2431
2432 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2433 if (!arg) {
2434 rc = -ENOMEM;
2435 goto error;
2436 }
2437
2438 arg->cb = cb;
2439 arg->cb_context = cb_context;
2440
2441 switch (dev->device_type) {
2442 case PN533_DEVICE_PASORI:
2443 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2444 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2445 skb,
2446 pn533_data_exchange_complete,
2447 arg);
2448
2449 break;
2450 }
2451 default:
2452 /* jumbo frame ? */
2453 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2454 rc = pn533_fill_fragment_skbs(dev, skb);
2455 if (rc <= 0)
2456 goto error;
2457
2458 skb = skb_dequeue(&dev->fragment_skb);
2459 if (!skb) {
2460 rc = -EIO;
2461 goto error;
2462 }
2463 } else {
2464 *skb_push(skb, sizeof(u8)) = 1; /* TG */
2465 }
2466
2467 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2468 skb, pn533_data_exchange_complete,
2469 arg);
2470
2471 break;
2472 }
2473
2474 if (rc < 0) /* rc from send_async */
2475 goto error;
2476
2477 return 0;
2478
2479 error:
2480 kfree(arg);
2481 dev_kfree_skb(skb);
2482 return rc;
2483 }
2484
2485 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2486 struct sk_buff *resp)
2487 {
2488 u8 status;
2489
2490 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2491
2492 if (IS_ERR(resp))
2493 return PTR_ERR(resp);
2494
2495 status = resp->data[0];
2496
2497 dev_kfree_skb(resp);
2498
2499 if (status != 0) {
2500 nfc_tm_deactivated(dev->nfc_dev);
2501
2502 dev->tgt_mode = 0;
2503
2504 return 0;
2505 }
2506
2507 queue_work(dev->wq, &dev->tg_work);
2508
2509 return 0;
2510 }
2511
2512 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2513 {
2514 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2515 int rc;
2516
2517 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2518
2519 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2520 nfc_dev_err(&dev->interface->dev,
2521 "Data length greater than the max allowed: %d",
2522 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2523 return -ENOSYS;
2524 }
2525
2526 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2527 pn533_tm_send_complete, NULL);
2528 if (rc < 0)
2529 dev_kfree_skb(skb);
2530
2531 return rc;
2532 }
2533
2534 static void pn533_wq_mi_recv(struct work_struct *work)
2535 {
2536 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2537
2538 struct sk_buff *skb;
2539 int rc;
2540
2541 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2542
2543 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2544 if (!skb)
2545 goto error;
2546
2547 switch (dev->device_type) {
2548 case PN533_DEVICE_PASORI:
2549 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2550 rc = pn533_send_cmd_direct_async(dev,
2551 PN533_CMD_IN_COMM_THRU,
2552 skb,
2553 pn533_data_exchange_complete,
2554 dev->cmd_complete_mi_arg);
2555
2556 break;
2557 }
2558 default:
2559 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
2560
2561 rc = pn533_send_cmd_direct_async(dev,
2562 PN533_CMD_IN_DATA_EXCHANGE,
2563 skb,
2564 pn533_data_exchange_complete,
2565 dev->cmd_complete_mi_arg);
2566
2567 break;
2568 }
2569
2570 if (rc == 0) /* success */
2571 return;
2572
2573 nfc_dev_err(&dev->interface->dev,
2574 "Error %d when trying to perform data_exchange", rc);
2575
2576 dev_kfree_skb(skb);
2577 kfree(dev->cmd_complete_mi_arg);
2578
2579 error:
2580 pn533_send_ack(dev, GFP_KERNEL);
2581 queue_work(dev->wq, &dev->cmd_work);
2582 }
2583
2584 static void pn533_wq_mi_send(struct work_struct *work)
2585 {
2586 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2587 struct sk_buff *skb;
2588 int rc;
2589
2590 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2591
2592 /* Grab the first skb in the queue */
2593 skb = skb_dequeue(&dev->fragment_skb);
2594
2595 if (skb == NULL) { /* No more data */
2596 /* Reset the queue for future use */
2597 skb_queue_head_init(&dev->fragment_skb);
2598 goto error;
2599 }
2600
2601 switch (dev->device_type) {
2602 case PN533_DEVICE_PASORI:
2603 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2604 rc = -EIO;
2605 break;
2606 }
2607
2608 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2609 skb,
2610 pn533_data_exchange_complete,
2611 dev->cmd_complete_dep_arg);
2612
2613 break;
2614
2615 default:
2616 /* Still some fragments? */
2617 rc = pn533_send_cmd_direct_async(dev,PN533_CMD_IN_DATA_EXCHANGE,
2618 skb,
2619 pn533_data_exchange_complete,
2620 dev->cmd_complete_dep_arg);
2621
2622 break;
2623 }
2624
2625 if (rc == 0) /* success */
2626 return;
2627
2628 nfc_dev_err(&dev->interface->dev,
2629 "Error %d when trying to perform data_exchange", rc);
2630
2631 dev_kfree_skb(skb);
2632 kfree(dev->cmd_complete_dep_arg);
2633
2634 error:
2635 pn533_send_ack(dev, GFP_KERNEL);
2636 queue_work(dev->wq, &dev->cmd_work);
2637 }
2638
2639 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2640 u8 cfgdata_len)
2641 {
2642 struct sk_buff *skb;
2643 struct sk_buff *resp;
2644
2645 int skb_len;
2646
2647 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2648
2649 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2650
2651 skb = pn533_alloc_skb(dev, skb_len);
2652 if (!skb)
2653 return -ENOMEM;
2654
2655 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2656 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2657
2658 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2659 if (IS_ERR(resp))
2660 return PTR_ERR(resp);
2661
2662 dev_kfree_skb(resp);
2663 return 0;
2664 }
2665
2666 static int pn533_get_firmware_version(struct pn533 *dev,
2667 struct pn533_fw_version *fv)
2668 {
2669 struct sk_buff *skb;
2670 struct sk_buff *resp;
2671
2672 skb = pn533_alloc_skb(dev, 0);
2673 if (!skb)
2674 return -ENOMEM;
2675
2676 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2677 if (IS_ERR(resp))
2678 return PTR_ERR(resp);
2679
2680 fv->ic = resp->data[0];
2681 fv->ver = resp->data[1];
2682 fv->rev = resp->data[2];
2683 fv->support = resp->data[3];
2684
2685 dev_kfree_skb(resp);
2686 return 0;
2687 }
2688
2689 static int pn533_pasori_fw_reset(struct pn533 *dev)
2690 {
2691 struct sk_buff *skb;
2692 struct sk_buff *resp;
2693
2694 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2695
2696 skb = pn533_alloc_skb(dev, sizeof(u8));
2697 if (!skb)
2698 return -ENOMEM;
2699
2700 *skb_put(skb, sizeof(u8)) = 0x1;
2701
2702 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2703 if (IS_ERR(resp))
2704 return PTR_ERR(resp);
2705
2706 dev_kfree_skb(resp);
2707
2708 return 0;
2709 }
2710
2711 struct pn533_acr122_poweron_rdr_arg {
2712 int rc;
2713 struct completion done;
2714 };
2715
2716 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2717 {
2718 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2719
2720 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2721
2722 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2723 urb->transfer_buffer, urb->transfer_buffer_length,
2724 false);
2725
2726 arg->rc = urb->status;
2727 complete(&arg->done);
2728 }
2729
2730 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2731 {
2732 /* Power on th reader (CCID cmd) */
2733 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2734 0, 0, 0, 0, 0, 0, 3, 0, 0};
2735 u8 buf[255];
2736 int rc;
2737 void *cntx;
2738 struct pn533_acr122_poweron_rdr_arg arg;
2739
2740 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2741
2742 init_completion(&arg.done);
2743 cntx = dev->in_urb->context; /* backup context */
2744
2745 dev->in_urb->transfer_buffer = buf;
2746 dev->in_urb->transfer_buffer_length = 255;
2747 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2748 dev->in_urb->context = &arg;
2749
2750 dev->out_urb->transfer_buffer = cmd;
2751 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2752
2753 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2754 cmd, sizeof(cmd), false);
2755
2756 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2757 if (rc) {
2758 nfc_dev_err(&dev->interface->dev,
2759 "Reader power on cmd error %d", rc);
2760 return rc;
2761 }
2762
2763 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2764 if (rc) {
2765 nfc_dev_err(&dev->interface->dev,
2766 "Can't submit for reader power on cmd response %d",
2767 rc);
2768 return rc;
2769 }
2770
2771 wait_for_completion(&arg.done);
2772 dev->in_urb->context = cntx; /* restore context */
2773
2774 return arg.rc;
2775 }
2776
2777 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2778 {
2779 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2780 u8 rf_field = !!rf;
2781 int rc;
2782
2783 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2784
2785 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2786 (u8 *)&rf_field, 1);
2787 if (rc) {
2788 nfc_dev_err(&dev->interface->dev,
2789 "Error on setting RF field");
2790 return rc;
2791 }
2792
2793 return rc;
2794 }
2795
2796 int pn533_dev_up(struct nfc_dev *nfc_dev)
2797 {
2798 return pn533_rf_field(nfc_dev, 1);
2799 }
2800
2801 int pn533_dev_down(struct nfc_dev *nfc_dev)
2802 {
2803 return pn533_rf_field(nfc_dev, 0);
2804 }
2805
2806 static struct nfc_ops pn533_nfc_ops = {
2807 .dev_up = pn533_dev_up,
2808 .dev_down = pn533_dev_down,
2809 .dep_link_up = pn533_dep_link_up,
2810 .dep_link_down = pn533_dep_link_down,
2811 .start_poll = pn533_start_poll,
2812 .stop_poll = pn533_stop_poll,
2813 .activate_target = pn533_activate_target,
2814 .deactivate_target = pn533_deactivate_target,
2815 .im_transceive = pn533_transceive,
2816 .tm_send = pn533_tm_send,
2817 };
2818
2819 static int pn533_setup(struct pn533 *dev)
2820 {
2821 struct pn533_config_max_retries max_retries;
2822 struct pn533_config_timing timing;
2823 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2824 int rc;
2825
2826 switch (dev->device_type) {
2827 case PN533_DEVICE_STD:
2828 case PN533_DEVICE_PASORI:
2829 case PN533_DEVICE_ACR122U:
2830 max_retries.mx_rty_atr = 0x2;
2831 max_retries.mx_rty_psl = 0x1;
2832 max_retries.mx_rty_passive_act =
2833 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2834
2835 timing.rfu = PN533_CONFIG_TIMING_102;
2836 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2837 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2838
2839 break;
2840
2841 default:
2842 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2843 dev->device_type);
2844 return -EINVAL;
2845 }
2846
2847 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2848 (u8 *)&max_retries, sizeof(max_retries));
2849 if (rc) {
2850 nfc_dev_err(&dev->interface->dev,
2851 "Error on setting MAX_RETRIES config");
2852 return rc;
2853 }
2854
2855
2856 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2857 (u8 *)&timing, sizeof(timing));
2858 if (rc) {
2859 nfc_dev_err(&dev->interface->dev,
2860 "Error on setting RF timings");
2861 return rc;
2862 }
2863
2864 switch (dev->device_type) {
2865 case PN533_DEVICE_STD:
2866 break;
2867
2868 case PN533_DEVICE_PASORI:
2869 pn533_pasori_fw_reset(dev);
2870
2871 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2872 pasori_cfg, 3);
2873 if (rc) {
2874 nfc_dev_err(&dev->interface->dev,
2875 "Error while settings PASORI config");
2876 return rc;
2877 }
2878
2879 pn533_pasori_fw_reset(dev);
2880
2881 break;
2882 }
2883
2884 return 0;
2885 }
2886
2887 static int pn533_probe(struct usb_interface *interface,
2888 const struct usb_device_id *id)
2889 {
2890 struct pn533_fw_version fw_ver;
2891 struct pn533 *dev;
2892 struct usb_host_interface *iface_desc;
2893 struct usb_endpoint_descriptor *endpoint;
2894 int in_endpoint = 0;
2895 int out_endpoint = 0;
2896 int rc = -ENOMEM;
2897 int i;
2898 u32 protocols;
2899
2900 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2901 if (!dev)
2902 return -ENOMEM;
2903
2904 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2905 dev->interface = interface;
2906 mutex_init(&dev->cmd_lock);
2907
2908 iface_desc = interface->cur_altsetting;
2909 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2910 endpoint = &iface_desc->endpoint[i].desc;
2911
2912 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2913 in_endpoint = endpoint->bEndpointAddress;
2914
2915 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2916 out_endpoint = endpoint->bEndpointAddress;
2917 }
2918
2919 if (!in_endpoint || !out_endpoint) {
2920 nfc_dev_err(&interface->dev,
2921 "Could not find bulk-in or bulk-out endpoint");
2922 rc = -ENODEV;
2923 goto error;
2924 }
2925
2926 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2927 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2928
2929 if (!dev->in_urb || !dev->out_urb)
2930 goto error;
2931
2932 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2933 usb_rcvbulkpipe(dev->udev, in_endpoint),
2934 NULL, 0, NULL, dev);
2935 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2936 usb_sndbulkpipe(dev->udev, out_endpoint),
2937 NULL, 0, pn533_send_complete, dev);
2938
2939 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2940 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2941 INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
2942 INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
2943 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2944 INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
2945 INIT_WORK(&dev->rf_work, pn533_wq_rf);
2946 dev->wq = alloc_ordered_workqueue("pn533", 0);
2947 if (dev->wq == NULL)
2948 goto error;
2949
2950 init_timer(&dev->listen_timer);
2951 dev->listen_timer.data = (unsigned long) dev;
2952 dev->listen_timer.function = pn533_listen_mode_timer;
2953
2954 skb_queue_head_init(&dev->resp_q);
2955 skb_queue_head_init(&dev->fragment_skb);
2956
2957 INIT_LIST_HEAD(&dev->cmd_queue);
2958
2959 usb_set_intfdata(interface, dev);
2960
2961 dev->ops = &pn533_std_frame_ops;
2962
2963 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
2964 dev->device_type = id->driver_info;
2965 switch (dev->device_type) {
2966 case PN533_DEVICE_STD:
2967 protocols = PN533_ALL_PROTOCOLS;
2968 break;
2969
2970 case PN533_DEVICE_PASORI:
2971 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2972 break;
2973
2974 case PN533_DEVICE_ACR122U:
2975 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2976 dev->ops = &pn533_acr122_frame_ops;
2977 dev->protocol_type = PN533_PROTO_REQ_RESP,
2978
2979 rc = pn533_acr122_poweron_rdr(dev);
2980 if (rc < 0) {
2981 nfc_dev_err(&dev->interface->dev,
2982 "Couldn't poweron the reader (error %d)",
2983 rc);
2984 goto destroy_wq;
2985 }
2986 break;
2987
2988 default:
2989 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2990 dev->device_type);
2991 rc = -EINVAL;
2992 goto destroy_wq;
2993 }
2994
2995 memset(&fw_ver, 0, sizeof(fw_ver));
2996 rc = pn533_get_firmware_version(dev, &fw_ver);
2997 if (rc < 0)
2998 goto destroy_wq;
2999
3000 nfc_dev_info(&dev->interface->dev,
3001 "NXP PN5%02X firmware ver %d.%d now attached",
3002 fw_ver.ic, fw_ver.ver, fw_ver.rev);
3003
3004
3005 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
3006 dev->ops->tx_header_len +
3007 PN533_CMD_DATAEXCH_HEAD_LEN,
3008 dev->ops->tx_tail_len);
3009 if (!dev->nfc_dev) {
3010 rc = -ENOMEM;
3011 goto destroy_wq;
3012 }
3013
3014 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
3015 nfc_set_drvdata(dev->nfc_dev, dev);
3016
3017 rc = nfc_register_device(dev->nfc_dev);
3018 if (rc)
3019 goto free_nfc_dev;
3020
3021 rc = pn533_setup(dev);
3022 if (rc)
3023 goto unregister_nfc_dev;
3024
3025 return 0;
3026
3027 unregister_nfc_dev:
3028 nfc_unregister_device(dev->nfc_dev);
3029
3030 free_nfc_dev:
3031 nfc_free_device(dev->nfc_dev);
3032
3033 destroy_wq:
3034 destroy_workqueue(dev->wq);
3035 error:
3036 usb_free_urb(dev->in_urb);
3037 usb_free_urb(dev->out_urb);
3038 usb_put_dev(dev->udev);
3039 kfree(dev);
3040 return rc;
3041 }
3042
3043 static void pn533_disconnect(struct usb_interface *interface)
3044 {
3045 struct pn533 *dev;
3046 struct pn533_cmd *cmd, *n;
3047
3048 dev = usb_get_intfdata(interface);
3049 usb_set_intfdata(interface, NULL);
3050
3051 nfc_unregister_device(dev->nfc_dev);
3052 nfc_free_device(dev->nfc_dev);
3053
3054 usb_kill_urb(dev->in_urb);
3055 usb_kill_urb(dev->out_urb);
3056
3057 flush_delayed_work(&dev->poll_work);
3058 destroy_workqueue(dev->wq);
3059
3060 skb_queue_purge(&dev->resp_q);
3061
3062 del_timer(&dev->listen_timer);
3063
3064 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
3065 list_del(&cmd->queue);
3066 kfree(cmd);
3067 }
3068
3069 usb_free_urb(dev->in_urb);
3070 usb_free_urb(dev->out_urb);
3071 kfree(dev);
3072
3073 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
3074 }
3075
3076 static struct usb_driver pn533_driver = {
3077 .name = "pn533",
3078 .probe = pn533_probe,
3079 .disconnect = pn533_disconnect,
3080 .id_table = pn533_table,
3081 };
3082
3083 module_usb_driver(pn533_driver);
3084
3085 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
3086 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
3087 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
3088 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
3089 MODULE_VERSION(VERSION);
3090 MODULE_LICENSE("GPL");
Linus' kernel tree