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1/*
2 * NFC Digital Protocol stack
3 * Copyright (c) 2013, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 */
15
16#define pr_fmt(fmt) "digital: %s: " fmt, __func__
17
18#include "digital.h"
19
20#define DIGITAL_CMD_SENS_REQ 0x26
21#define DIGITAL_CMD_ALL_REQ 0x52
22#define DIGITAL_CMD_SEL_REQ_CL1 0x93
23#define DIGITAL_CMD_SEL_REQ_CL2 0x95
24#define DIGITAL_CMD_SEL_REQ_CL3 0x97
25
26#define DIGITAL_SDD_REQ_SEL_PAR 0x20
27
28#define DIGITAL_SDD_RES_CT 0x88
29#define DIGITAL_SDD_RES_LEN 5
30
31#define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04))
32#define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60))
33#define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20)
34#define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40)
35
36#define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00)
37#define DIGITAL_SENS_RES_IS_VALID(sens_res) \
38 ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \
39 (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00))
40
41#define DIGITAL_MIFARE_READ_RES_LEN 16
42#define DIGITAL_MIFARE_ACK_RES 0x0A
43
44#define DIGITAL_CMD_SENSB_REQ 0x05
45#define DIGITAL_SENSB_ADVANCED BIT(5)
46#define DIGITAL_SENSB_EXTENDED BIT(4)
47#define DIGITAL_SENSB_ALLB_REQ BIT(3)
48#define DIGITAL_SENSB_N(n) ((n) & 0x7)
49
50#define DIGITAL_CMD_SENSB_RES 0x50
51
52#define DIGITAL_CMD_ATTRIB_REQ 0x1D
53#define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6)
54#define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4)
55#define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3)
56#define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2)
57#define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6)
58#define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4)
59#define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8
60#define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf)
61
62#define DIGITAL_CMD_SENSF_REQ 0x00
63#define DIGITAL_CMD_SENSF_RES 0x01
64
65#define DIGITAL_SENSF_RES_MIN_LENGTH 17
66#define DIGITAL_SENSF_RES_RD_AP_B1 0x00
67#define DIGITAL_SENSF_RES_RD_AP_B2 0x8F
68
69#define DIGITAL_SENSF_REQ_RC_NONE 0
70#define DIGITAL_SENSF_REQ_RC_SC 1
71#define DIGITAL_SENSF_REQ_RC_AP 2
72
73#define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01
74
75#define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1)
76#define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2)
77#define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5)
78#define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0)
79#define DIGITAL_ISO15693_RES_IS_VALID(flags) \
80 (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR))
81
82#define DIGITAL_ISO_DEP_I_PCB 0x02
83#define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01)
84
85#define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0)
86
87#define DIGITAL_ISO_DEP_I_BLOCK 0x00
88
89#define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08)
90
91static const u8 digital_ats_fsc[] = {
92 16, 24, 32, 40, 48, 64, 96, 128,
93};
94
95#define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F)
96#define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4)
97#define DIGITAL_ATS_MAX_FSC 256
98
99#define DIGITAL_RATS_BYTE1 0xE0
100#define DIGITAL_RATS_PARAM 0x80
101
102struct digital_sdd_res {
103 u8 nfcid1[4];
104 u8 bcc;
105} __packed;
106
107struct digital_sel_req {
108 u8 sel_cmd;
109 u8 b2;
110 u8 nfcid1[4];
111 u8 bcc;
112} __packed;
113
114struct digital_sensb_req {
115 u8 cmd;
116 u8 afi;
117 u8 param;
118} __packed;
119
120struct digital_sensb_res {
121 u8 cmd;
122 u8 nfcid0[4];
123 u8 app_data[4];
124 u8 proto_info[3];
125} __packed;
126
127struct digital_attrib_req {
128 u8 cmd;
129 u8 nfcid0[4];
130 u8 param1;
131 u8 param2;
132 u8 param3;
133 u8 param4;
134} __packed;
135
136struct digital_attrib_res {
137 u8 mbli_did;
138} __packed;
139
140struct digital_sensf_req {
141 u8 cmd;
142 u8 sc1;
143 u8 sc2;
144 u8 rc;
145 u8 tsn;
146} __packed;
147
148struct digital_sensf_res {
149 u8 cmd;
150 u8 nfcid2[8];
151 u8 pad0[2];
152 u8 pad1[3];
153 u8 mrti_check;
154 u8 mrti_update;
155 u8 pad2;
156 u8 rd[2];
157} __packed;
158
159struct digital_iso15693_inv_req {
160 u8 flags;
161 u8 cmd;
162 u8 mask_len;
163 u64 mask;
164} __packed;
165
166struct digital_iso15693_inv_res {
167 u8 flags;
168 u8 dsfid;
169 u64 uid;
170} __packed;
171
172static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
173 struct nfc_target *target);
174
175int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev,
176 struct sk_buff *skb)
177{
178 u8 pcb;
179 u8 block_type;
180
181 if (skb->len < 1)
182 return -EIO;
183
184 pcb = *skb->data;
185 block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb);
186
187 /* No support fo R-block nor S-block */
188 if (block_type != DIGITAL_ISO_DEP_I_BLOCK) {
189 pr_err("ISO_DEP R-block and S-block not supported\n");
190 return -EIO;
191 }
192
193 if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) {
194 pr_err("DID field in ISO_DEP PCB not supported\n");
195 return -EIO;
196 }
197
198 skb_pull(skb, 1);
199
200 return 0;
201}
202
203int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev,
204 struct sk_buff *skb)
205{
206 /*
207 * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must
208 * not be greater than remote FSC
209 */
210 if (skb->len + 3 > ddev->target_fsc)
211 return -EIO;
212
213 skb_push(skb, 1);
214
215 *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni;
216
217 ddev->curr_nfc_dep_pni =
218 DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1);
219
220 return 0;
221}
222
223static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg,
224 struct sk_buff *resp)
225{
226 struct nfc_target *target = arg;
227 u8 fsdi;
228 int rc;
229
230 if (IS_ERR(resp)) {
231 rc = PTR_ERR(resp);
232 resp = NULL;
233 goto exit;
234 }
235
236 if (resp->len < 2) {
237 rc = -EIO;
238 goto exit;
239 }
240
241 fsdi = DIGITAL_ATS_FSCI(resp->data[1]);
242 if (fsdi >= 8)
243 ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
244 else
245 ddev->target_fsc = digital_ats_fsc[fsdi];
246
247 ddev->curr_nfc_dep_pni = 0;
248
249 rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443);
250
251exit:
252 dev_kfree_skb(resp);
253 kfree(target);
254
255 if (rc)
256 digital_poll_next_tech(ddev);
257}
258
259static int digital_in_send_rats(struct nfc_digital_dev *ddev,
260 struct nfc_target *target)
261{
262 int rc;
263 struct sk_buff *skb;
264
265 skb = digital_skb_alloc(ddev, 2);
266 if (!skb)
267 return -ENOMEM;
268
269 *skb_put(skb, 1) = DIGITAL_RATS_BYTE1;
270 *skb_put(skb, 1) = DIGITAL_RATS_PARAM;
271
272 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats,
273 target);
274 if (rc)
275 kfree_skb(skb);
276
277 return rc;
278}
279
280static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
281 struct sk_buff *resp)
282{
283 struct nfc_target *target = arg;
284 int rc;
285 u8 sel_res;
286 u8 nfc_proto;
287
288 if (IS_ERR(resp)) {
289 rc = PTR_ERR(resp);
290 resp = NULL;
291 goto exit;
292 }
293
294 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
295 rc = digital_skb_check_crc_a(resp);
296 if (rc) {
297 PROTOCOL_ERR("4.4.1.3");
298 goto exit;
299 }
300 }
301
302 if (!resp->len) {
303 rc = -EIO;
304 goto exit;
305 }
306
307 sel_res = resp->data[0];
308
309 if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) {
310 rc = digital_in_send_sdd_req(ddev, target);
311 if (rc)
312 goto exit;
313
314 goto exit_free_skb;
315 }
316
317 target->sel_res = sel_res;
318
319 if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
320 nfc_proto = NFC_PROTO_MIFARE;
321 } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
322 nfc_proto = NFC_PROTO_NFC_DEP;
323 } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) {
324 rc = digital_in_send_rats(ddev, target);
325 if (rc)
326 goto exit;
327 /*
328 * Skip target_found and don't free it for now. This will be
329 * done when receiving the ATS
330 */
331 goto exit_free_skb;
332 } else {
333 rc = -EOPNOTSUPP;
334 goto exit;
335 }
336
337 rc = digital_target_found(ddev, target, nfc_proto);
338
339exit:
340 kfree(target);
341
342exit_free_skb:
343 dev_kfree_skb(resp);
344
345 if (rc)
346 digital_poll_next_tech(ddev);
347}
348
349static int digital_in_send_sel_req(struct nfc_digital_dev *ddev,
350 struct nfc_target *target,
351 struct digital_sdd_res *sdd_res)
352{
353 struct sk_buff *skb;
354 struct digital_sel_req *sel_req;
355 u8 sel_cmd;
356 int rc;
357
358 skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req));
359 if (!skb)
360 return -ENOMEM;
361
362 skb_put(skb, sizeof(struct digital_sel_req));
363 sel_req = (struct digital_sel_req *)skb->data;
364
365 if (target->nfcid1_len <= 4)
366 sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
367 else if (target->nfcid1_len < 10)
368 sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
369 else
370 sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
371
372 sel_req->sel_cmd = sel_cmd;
373 sel_req->b2 = 0x70;
374 memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4);
375 sel_req->bcc = sdd_res->bcc;
376
377 if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
378 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
379 NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
380 if (rc)
381 goto exit;
382 } else {
383 digital_skb_add_crc_a(skb);
384 }
385
386 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res,
387 target);
388exit:
389 if (rc)
390 kfree_skb(skb);
391
392 return rc;
393}
394
395static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg,
396 struct sk_buff *resp)
397{
398 struct nfc_target *target = arg;
399 struct digital_sdd_res *sdd_res;
400 int rc;
401 u8 offset, size;
402 u8 i, bcc;
403
404 if (IS_ERR(resp)) {
405 rc = PTR_ERR(resp);
406 resp = NULL;
407 goto exit;
408 }
409
410 if (resp->len < DIGITAL_SDD_RES_LEN) {
411 PROTOCOL_ERR("4.7.2.8");
412 rc = -EINVAL;
413 goto exit;
414 }
415
416 sdd_res = (struct digital_sdd_res *)resp->data;
417
418 for (i = 0, bcc = 0; i < 4; i++)
419 bcc ^= sdd_res->nfcid1[i];
420
421 if (bcc != sdd_res->bcc) {
422 PROTOCOL_ERR("4.7.2.6");
423 rc = -EINVAL;
424 goto exit;
425 }
426
427 if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) {
428 offset = 1;
429 size = 3;
430 } else {
431 offset = 0;
432 size = 4;
433 }
434
435 memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset,
436 size);
437 target->nfcid1_len += size;
438
439 rc = digital_in_send_sel_req(ddev, target, sdd_res);
440
441exit:
442 dev_kfree_skb(resp);
443
444 if (rc) {
445 kfree(target);
446 digital_poll_next_tech(ddev);
447 }
448}
449
450static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
451 struct nfc_target *target)
452{
453 int rc;
454 struct sk_buff *skb;
455 u8 sel_cmd;
456
457 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
458 NFC_DIGITAL_FRAMING_NFCA_STANDARD);
459 if (rc)
460 return rc;
461
462 skb = digital_skb_alloc(ddev, 2);
463 if (!skb)
464 return -ENOMEM;
465
466 if (target->nfcid1_len == 0)
467 sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
468 else if (target->nfcid1_len == 3)
469 sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
470 else
471 sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
472
473 *skb_put(skb, sizeof(u8)) = sel_cmd;
474 *skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR;
475
476 return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res,
477 target);
478}
479
480static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg,
481 struct sk_buff *resp)
482{
483 struct nfc_target *target = NULL;
484 int rc;
485
486 if (IS_ERR(resp)) {
487 rc = PTR_ERR(resp);
488 resp = NULL;
489 goto exit;
490 }
491
492 if (resp->len < sizeof(u16)) {
493 rc = -EIO;
494 goto exit;
495 }
496
497 target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
498 if (!target) {
499 rc = -ENOMEM;
500 goto exit;
501 }
502
503 target->sens_res = __le16_to_cpu(*(__le16 *)resp->data);
504
505 if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) {
506 PROTOCOL_ERR("4.6.3.3");
507 rc = -EINVAL;
508 goto exit;
509 }
510
511 if (DIGITAL_SENS_RES_IS_T1T(target->sens_res))
512 rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL);
513 else
514 rc = digital_in_send_sdd_req(ddev, target);
515
516exit:
517 dev_kfree_skb(resp);
518
519 if (rc) {
520 kfree(target);
521 digital_poll_next_tech(ddev);
522 }
523}
524
525int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech)
526{
527 struct sk_buff *skb;
528 int rc;
529
530 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
531 NFC_DIGITAL_RF_TECH_106A);
532 if (rc)
533 return rc;
534
535 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
536 NFC_DIGITAL_FRAMING_NFCA_SHORT);
537 if (rc)
538 return rc;
539
540 skb = digital_skb_alloc(ddev, 1);
541 if (!skb)
542 return -ENOMEM;
543
544 *skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ;
545
546 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL);
547 if (rc)
548 kfree_skb(skb);
549
550 return rc;
551}
552
553int digital_in_recv_mifare_res(struct sk_buff *resp)
554{
555 /* Successful READ command response is 16 data bytes + 2 CRC bytes long.
556 * Since the driver can't differentiate a ACK/NACK response from a valid
557 * READ response, the CRC calculation must be handled at digital level
558 * even if the driver supports it for this technology.
559 */
560 if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) {
561 if (digital_skb_check_crc_a(resp)) {
562 PROTOCOL_ERR("9.4.1.2");
563 return -EIO;
564 }
565
566 return 0;
567 }
568
569 /* ACK response (i.e. successful WRITE). */
570 if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) {
571 resp->data[0] = 0;
572 return 0;
573 }
574
575 /* NACK and any other responses are treated as error. */
576 return -EIO;
577}
578
579static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg,
580 struct sk_buff *resp)
581{
582 struct nfc_target *target = arg;
583 struct digital_attrib_res *attrib_res;
584 int rc;
585
586 if (IS_ERR(resp)) {
587 rc = PTR_ERR(resp);
588 resp = NULL;
589 goto exit;
590 }
591
592 if (resp->len < sizeof(*attrib_res)) {
593 PROTOCOL_ERR("12.6.2");
594 rc = -EIO;
595 goto exit;
596 }
597
598 attrib_res = (struct digital_attrib_res *)resp->data;
599
600 if (attrib_res->mbli_did & 0x0f) {
601 PROTOCOL_ERR("12.6.2.1");
602 rc = -EIO;
603 goto exit;
604 }
605
606 rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B);
607
608exit:
609 dev_kfree_skb(resp);
610 kfree(target);
611
612 if (rc)
613 digital_poll_next_tech(ddev);
614}
615
616static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev,
617 struct nfc_target *target,
618 struct digital_sensb_res *sensb_res)
619{
620 struct digital_attrib_req *attrib_req;
621 struct sk_buff *skb;
622 int rc;
623
624 skb = digital_skb_alloc(ddev, sizeof(*attrib_req));
625 if (!skb)
626 return -ENOMEM;
627
628 attrib_req = (struct digital_attrib_req *)skb_put(skb,
629 sizeof(*attrib_req));
630
631 attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ;
632 memcpy(attrib_req->nfcid0, sensb_res->nfcid0,
633 sizeof(attrib_req->nfcid0));
634 attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT |
635 DIGITAL_ATTRIB_P1_TR1_DEFAULT;
636 attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 |
637 DIGITAL_ATTRIB_P2_POLL_LISTEN_1 |
638 DIGITAL_ATTRIB_P2_MAX_FRAME_256;
639 attrib_req->param3 = sensb_res->proto_info[1] & 0x07;
640 attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0);
641
642 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res,
643 target);
644 if (rc)
645 kfree_skb(skb);
646
647 return rc;
648}
649
650static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg,
651 struct sk_buff *resp)
652{
653 struct nfc_target *target = NULL;
654 struct digital_sensb_res *sensb_res;
655 u8 fsci;
656 int rc;
657
658 if (IS_ERR(resp)) {
659 rc = PTR_ERR(resp);
660 resp = NULL;
661 goto exit;
662 }
663
664 if (resp->len != sizeof(*sensb_res)) {
665 PROTOCOL_ERR("5.6.2.1");
666 rc = -EIO;
667 goto exit;
668 }
669
670 sensb_res = (struct digital_sensb_res *)resp->data;
671
672 if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) {
673 PROTOCOL_ERR("5.6.2");
674 rc = -EIO;
675 goto exit;
676 }
677
678 if (!(sensb_res->proto_info[1] & BIT(0))) {
679 PROTOCOL_ERR("5.6.2.12");
680 rc = -EIO;
681 goto exit;
682 }
683
684 if (sensb_res->proto_info[1] & BIT(3)) {
685 PROTOCOL_ERR("5.6.2.16");
686 rc = -EIO;
687 goto exit;
688 }
689
690 fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]);
691 if (fsci >= 8)
692 ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
693 else
694 ddev->target_fsc = digital_ats_fsc[fsci];
695
696 target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
697 if (!target) {
698 rc = -ENOMEM;
699 goto exit;
700 }
701
702 rc = digital_in_send_attrib_req(ddev, target, sensb_res);
703
704exit:
705 dev_kfree_skb(resp);
706
707 if (rc) {
708 kfree(target);
709 digital_poll_next_tech(ddev);
710 }
711}
712
713int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech)
714{
715 struct digital_sensb_req *sensb_req;
716 struct sk_buff *skb;
717 int rc;
718
719 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
720 NFC_DIGITAL_RF_TECH_106B);
721 if (rc)
722 return rc;
723
724 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
725 NFC_DIGITAL_FRAMING_NFCB);
726 if (rc)
727 return rc;
728
729 skb = digital_skb_alloc(ddev, sizeof(*sensb_req));
730 if (!skb)
731 return -ENOMEM;
732
733 sensb_req = (struct digital_sensb_req *)skb_put(skb,
734 sizeof(*sensb_req));
735
736 sensb_req->cmd = DIGITAL_CMD_SENSB_REQ;
737 sensb_req->afi = 0x00; /* All families and sub-families */
738 sensb_req->param = DIGITAL_SENSB_N(0);
739
740 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res,
741 NULL);
742 if (rc)
743 kfree_skb(skb);
744
745 return rc;
746}
747
748static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg,
749 struct sk_buff *resp)
750{
751 int rc;
752 u8 proto;
753 struct nfc_target target;
754 struct digital_sensf_res *sensf_res;
755
756 if (IS_ERR(resp)) {
757 rc = PTR_ERR(resp);
758 resp = NULL;
759 goto exit;
760 }
761
762 if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) {
763 rc = -EIO;
764 goto exit;
765 }
766
767 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
768 rc = digital_skb_check_crc_f(resp);
769 if (rc) {
770 PROTOCOL_ERR("6.4.1.8");
771 goto exit;
772 }
773 }
774
775 skb_pull(resp, 1);
776
777 memset(&target, 0, sizeof(struct nfc_target));
778
779 sensf_res = (struct digital_sensf_res *)resp->data;
780
781 memcpy(target.sensf_res, sensf_res, resp->len);
782 target.sensf_res_len = resp->len;
783
784 memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE);
785 target.nfcid2_len = NFC_NFCID2_MAXSIZE;
786
787 if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 &&
788 target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2)
789 proto = NFC_PROTO_NFC_DEP;
790 else
791 proto = NFC_PROTO_FELICA;
792
793 rc = digital_target_found(ddev, &target, proto);
794
795exit:
796 dev_kfree_skb(resp);
797
798 if (rc)
799 digital_poll_next_tech(ddev);
800}
801
802int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
803{
804 struct digital_sensf_req *sensf_req;
805 struct sk_buff *skb;
806 int rc;
807 u8 size;
808
809 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
810 if (rc)
811 return rc;
812
813 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
814 NFC_DIGITAL_FRAMING_NFCF);
815 if (rc)
816 return rc;
817
818 size = sizeof(struct digital_sensf_req);
819
820 skb = digital_skb_alloc(ddev, size);
821 if (!skb)
822 return -ENOMEM;
823
824 skb_put(skb, size);
825
826 sensf_req = (struct digital_sensf_req *)skb->data;
827 sensf_req->cmd = DIGITAL_CMD_SENSF_REQ;
828 sensf_req->sc1 = 0xFF;
829 sensf_req->sc2 = 0xFF;
830 sensf_req->rc = 0;
831 sensf_req->tsn = 0;
832
833 *skb_push(skb, 1) = size + 1;
834
835 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev))
836 digital_skb_add_crc_f(skb);
837
838 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res,
839 NULL);
840 if (rc)
841 kfree_skb(skb);
842
843 return rc;
844}
845
846static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev,
847 void *arg, struct sk_buff *resp)
848{
849 struct digital_iso15693_inv_res *res;
850 struct nfc_target *target = NULL;
851 int rc;
852
853 if (IS_ERR(resp)) {
854 rc = PTR_ERR(resp);
855 resp = NULL;
856 goto out_free_skb;
857 }
858
859 if (resp->len != sizeof(*res)) {
860 rc = -EIO;
861 goto out_free_skb;
862 }
863
864 res = (struct digital_iso15693_inv_res *)resp->data;
865
866 if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) {
867 PROTOCOL_ERR("ISO15693 - 10.3.1");
868 rc = -EINVAL;
869 goto out_free_skb;
870 }
871
872 target = kzalloc(sizeof(*target), GFP_KERNEL);
873 if (!target) {
874 rc = -ENOMEM;
875 goto out_free_skb;
876 }
877
878 target->is_iso15693 = 1;
879 target->iso15693_dsfid = res->dsfid;
880 memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid));
881
882 rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693);
883
884 kfree(target);
885
886out_free_skb:
887 dev_kfree_skb(resp);
888
889 if (rc)
890 digital_poll_next_tech(ddev);
891}
892
893int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech)
894{
895 struct digital_iso15693_inv_req *req;
896 struct sk_buff *skb;
897 int rc;
898
899 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
900 NFC_DIGITAL_RF_TECH_ISO15693);
901 if (rc)
902 return rc;
903
904 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
905 NFC_DIGITAL_FRAMING_ISO15693_INVENTORY);
906 if (rc)
907 return rc;
908
909 skb = digital_skb_alloc(ddev, sizeof(*req));
910 if (!skb)
911 return -ENOMEM;
912
913 skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */
914 req = (struct digital_iso15693_inv_req *)skb->data;
915
916 /* Single sub-carrier, high data rate, no AFI, single slot
917 * Inventory command
918 */
919 req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE |
920 DIGITAL_ISO15693_REQ_FLAG_INVENTORY |
921 DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS;
922 req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ;
923 req->mask_len = 0;
924
925 rc = digital_in_send_cmd(ddev, skb, 30,
926 digital_in_recv_iso15693_inv_res, NULL);
927 if (rc)
928 kfree_skb(skb);
929
930 return rc;
931}
932
933static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
934{
935 struct sk_buff *skb;
936 int rc;
937
938 skb = digital_skb_alloc(ddev, 1);
939 if (!skb)
940 return -ENOMEM;
941
942 *skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP;
943
944 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
945 digital_skb_add_crc_a(skb);
946
947 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
948 NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE);
949 if (rc) {
950 kfree_skb(skb);
951 return rc;
952 }
953
954 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req,
955 NULL);
956 if (rc)
957 kfree_skb(skb);
958
959 return rc;
960}
961
962static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg,
963 struct sk_buff *resp)
964{
965 int rc;
966
967 if (IS_ERR(resp)) {
968 rc = PTR_ERR(resp);
969 resp = NULL;
970 goto exit;
971 }
972
973 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
974 rc = digital_skb_check_crc_a(resp);
975 if (rc) {
976 PROTOCOL_ERR("4.4.1.3");
977 goto exit;
978 }
979 }
980
981 /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */
982
983 rc = digital_tg_send_sel_res(ddev);
984
985exit:
986 if (rc)
987 digital_poll_next_tech(ddev);
988
989 dev_kfree_skb(resp);
990}
991
992static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev)
993{
994 struct sk_buff *skb;
995 struct digital_sdd_res *sdd_res;
996 int rc, i;
997
998 skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res));
999 if (!skb)
1000 return -ENOMEM;
1001
1002 skb_put(skb, sizeof(struct digital_sdd_res));
1003 sdd_res = (struct digital_sdd_res *)skb->data;
1004
1005 sdd_res->nfcid1[0] = 0x08;
1006 get_random_bytes(sdd_res->nfcid1 + 1, 3);
1007
1008 sdd_res->bcc = 0;
1009 for (i = 0; i < 4; i++)
1010 sdd_res->bcc ^= sdd_res->nfcid1[i];
1011
1012 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1013 NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
1014 if (rc) {
1015 kfree_skb(skb);
1016 return rc;
1017 }
1018
1019 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req,
1020 NULL);
1021 if (rc)
1022 kfree_skb(skb);
1023
1024 return rc;
1025}
1026
1027static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg,
1028 struct sk_buff *resp)
1029{
1030 u8 *sdd_req;
1031 int rc;
1032
1033 if (IS_ERR(resp)) {
1034 rc = PTR_ERR(resp);
1035 resp = NULL;
1036 goto exit;
1037 }
1038
1039 sdd_req = resp->data;
1040
1041 if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 ||
1042 sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) {
1043 rc = -EINVAL;
1044 goto exit;
1045 }
1046
1047 rc = digital_tg_send_sdd_res(ddev);
1048
1049exit:
1050 if (rc)
1051 digital_poll_next_tech(ddev);
1052
1053 dev_kfree_skb(resp);
1054}
1055
1056static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev)
1057{
1058 struct sk_buff *skb;
1059 u8 *sens_res;
1060 int rc;
1061
1062 skb = digital_skb_alloc(ddev, 2);
1063 if (!skb)
1064 return -ENOMEM;
1065
1066 sens_res = skb_put(skb, 2);
1067
1068 sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF;
1069 sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF;
1070
1071 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1072 NFC_DIGITAL_FRAMING_NFCA_STANDARD);
1073 if (rc) {
1074 kfree_skb(skb);
1075 return rc;
1076 }
1077
1078 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req,
1079 NULL);
1080 if (rc)
1081 kfree_skb(skb);
1082
1083 return rc;
1084}
1085
1086void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
1087 struct sk_buff *resp)
1088{
1089 u8 sens_req;
1090 int rc;
1091
1092 if (IS_ERR(resp)) {
1093 rc = PTR_ERR(resp);
1094 resp = NULL;
1095 goto exit;
1096 }
1097
1098 sens_req = resp->data[0];
1099
1100 if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ &&
1101 sens_req != DIGITAL_CMD_ALL_REQ)) {
1102 rc = -EINVAL;
1103 goto exit;
1104 }
1105
1106 rc = digital_tg_send_sens_res(ddev);
1107
1108exit:
1109 if (rc)
1110 digital_poll_next_tech(ddev);
1111
1112 dev_kfree_skb(resp);
1113}
1114
1115static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev,
1116 void *arg, struct sk_buff *resp)
1117{
1118 if (!IS_ERR(resp) && (resp->len >= 2) &&
1119 (resp->data[1] == DIGITAL_CMD_SENSF_REQ))
1120 digital_tg_recv_sensf_req(ddev, arg, resp);
1121 else
1122 digital_tg_recv_atr_req(ddev, arg, resp);
1123
1124 return;
1125}
1126
1127static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
1128 struct digital_sensf_req *sensf_req)
1129{
1130 struct sk_buff *skb;
1131 u8 size;
1132 int rc;
1133 struct digital_sensf_res *sensf_res;
1134
1135 size = sizeof(struct digital_sensf_res);
1136
1137 if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE)
1138 size -= sizeof(sensf_res->rd);
1139
1140 skb = digital_skb_alloc(ddev, size);
1141 if (!skb)
1142 return -ENOMEM;
1143
1144 skb_put(skb, size);
1145
1146 sensf_res = (struct digital_sensf_res *)skb->data;
1147
1148 memset(sensf_res, 0, size);
1149
1150 sensf_res->cmd = DIGITAL_CMD_SENSF_RES;
1151 sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
1152 sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
1153 get_random_bytes(&sensf_res->nfcid2[2], 6);
1154
1155 switch (sensf_req->rc) {
1156 case DIGITAL_SENSF_REQ_RC_SC:
1157 sensf_res->rd[0] = sensf_req->sc1;
1158 sensf_res->rd[1] = sensf_req->sc2;
1159 break;
1160 case DIGITAL_SENSF_REQ_RC_AP:
1161 sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1;
1162 sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2;
1163 break;
1164 }
1165
1166 *skb_push(skb, sizeof(u8)) = size + 1;
1167
1168 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
1169 digital_skb_add_crc_f(skb);
1170
1171 rc = digital_tg_send_cmd(ddev, skb, 300,
1172 digital_tg_recv_atr_or_sensf_req, NULL);
1173 if (rc)
1174 kfree_skb(skb);
1175
1176 return rc;
1177}
1178
1179void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
1180 struct sk_buff *resp)
1181{
1182 struct digital_sensf_req *sensf_req;
1183 int rc;
1184
1185 if (IS_ERR(resp)) {
1186 rc = PTR_ERR(resp);
1187 resp = NULL;
1188 goto exit;
1189 }
1190
1191 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
1192 rc = digital_skb_check_crc_f(resp);
1193 if (rc) {
1194 PROTOCOL_ERR("6.4.1.8");
1195 goto exit;
1196 }
1197 }
1198
1199 if (resp->len != sizeof(struct digital_sensf_req) + 1) {
1200 rc = -EINVAL;
1201 goto exit;
1202 }
1203
1204 skb_pull(resp, 1);
1205 sensf_req = (struct digital_sensf_req *)resp->data;
1206
1207 if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) {
1208 rc = -EINVAL;
1209 goto exit;
1210 }
1211
1212 rc = digital_tg_send_sensf_res(ddev, sensf_req);
1213
1214exit:
1215 if (rc)
1216 digital_poll_next_tech(ddev);
1217
1218 dev_kfree_skb(resp);
1219}
1220
1221static int digital_tg_config_nfca(struct nfc_digital_dev *ddev)
1222{
1223 int rc;
1224
1225 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1226 NFC_DIGITAL_RF_TECH_106A);
1227 if (rc)
1228 return rc;
1229
1230 return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1231 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1232}
1233
1234int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech)
1235{
1236 int rc;
1237
1238 rc = digital_tg_config_nfca(ddev);
1239 if (rc)
1240 return rc;
1241
1242 return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL);
1243}
1244
1245static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
1246{
1247 int rc;
1248
1249 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
1250 if (rc)
1251 return rc;
1252
1253 return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1254 NFC_DIGITAL_FRAMING_NFCF_NFC_DEP);
1255}
1256
1257int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
1258{
1259 int rc;
1260
1261 rc = digital_tg_config_nfcf(ddev, rf_tech);
1262 if (rc)
1263 return rc;
1264
1265 return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, NULL);
1266}
1267
1268void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg,
1269 struct sk_buff *resp)
1270{
1271 u8 rf_tech;
1272 int rc;
1273
1274 if (IS_ERR(resp)) {
1275 resp = NULL;
1276 goto exit_free_skb;
1277 }
1278
1279 rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech);
1280 if (rc)
1281 goto exit_free_skb;
1282
1283 switch (rf_tech) {
1284 case NFC_DIGITAL_RF_TECH_106A:
1285 rc = digital_tg_config_nfca(ddev);
1286 if (rc)
1287 goto exit_free_skb;
1288 digital_tg_recv_sens_req(ddev, arg, resp);
1289 break;
1290 case NFC_DIGITAL_RF_TECH_212F:
1291 case NFC_DIGITAL_RF_TECH_424F:
1292 rc = digital_tg_config_nfcf(ddev, rf_tech);
1293 if (rc)
1294 goto exit_free_skb;
1295 digital_tg_recv_sensf_req(ddev, arg, resp);
1296 break;
1297 default:
1298 goto exit_free_skb;
1299 }
1300
1301 return;
1302
1303exit_free_skb:
1304 digital_poll_next_tech(ddev);
1305 dev_kfree_skb(resp);
1306}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * NFC Digital Protocol stack
4 * Copyright (c) 2013, Intel Corporation.
5 */
6
7#define pr_fmt(fmt) "digital: %s: " fmt, __func__
8
9#include "digital.h"
10
11#define DIGITAL_CMD_SENS_REQ 0x26
12#define DIGITAL_CMD_ALL_REQ 0x52
13#define DIGITAL_CMD_SEL_REQ_CL1 0x93
14#define DIGITAL_CMD_SEL_REQ_CL2 0x95
15#define DIGITAL_CMD_SEL_REQ_CL3 0x97
16
17#define DIGITAL_SDD_REQ_SEL_PAR 0x20
18
19#define DIGITAL_SDD_RES_CT 0x88
20#define DIGITAL_SDD_RES_LEN 5
21#define DIGITAL_SEL_RES_LEN 1
22
23#define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04))
24#define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60))
25#define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20)
26#define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40)
27
28#define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00)
29#define DIGITAL_SENS_RES_IS_VALID(sens_res) \
30 ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \
31 (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00))
32
33#define DIGITAL_MIFARE_READ_RES_LEN 16
34#define DIGITAL_MIFARE_ACK_RES 0x0A
35
36#define DIGITAL_CMD_SENSB_REQ 0x05
37#define DIGITAL_SENSB_ADVANCED BIT(5)
38#define DIGITAL_SENSB_EXTENDED BIT(4)
39#define DIGITAL_SENSB_ALLB_REQ BIT(3)
40#define DIGITAL_SENSB_N(n) ((n) & 0x7)
41
42#define DIGITAL_CMD_SENSB_RES 0x50
43
44#define DIGITAL_CMD_ATTRIB_REQ 0x1D
45#define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6)
46#define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4)
47#define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3)
48#define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2)
49#define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6)
50#define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4)
51#define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8
52#define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf)
53
54#define DIGITAL_CMD_SENSF_REQ 0x00
55#define DIGITAL_CMD_SENSF_RES 0x01
56
57#define DIGITAL_SENSF_RES_MIN_LENGTH 17
58#define DIGITAL_SENSF_RES_RD_AP_B1 0x00
59#define DIGITAL_SENSF_RES_RD_AP_B2 0x8F
60
61#define DIGITAL_SENSF_REQ_RC_NONE 0
62#define DIGITAL_SENSF_REQ_RC_SC 1
63#define DIGITAL_SENSF_REQ_RC_AP 2
64
65#define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01
66
67#define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1)
68#define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2)
69#define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5)
70#define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0)
71#define DIGITAL_ISO15693_RES_IS_VALID(flags) \
72 (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR))
73
74#define DIGITAL_ISO_DEP_I_PCB 0x02
75#define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01)
76
77#define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0)
78
79#define DIGITAL_ISO_DEP_I_BLOCK 0x00
80
81#define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08)
82
83static const u8 digital_ats_fsc[] = {
84 16, 24, 32, 40, 48, 64, 96, 128,
85};
86
87#define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F)
88#define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4)
89#define DIGITAL_ATS_MAX_FSC 256
90
91#define DIGITAL_RATS_BYTE1 0xE0
92#define DIGITAL_RATS_PARAM 0x80
93
94struct digital_sdd_res {
95 u8 nfcid1[4];
96 u8 bcc;
97} __packed;
98
99struct digital_sel_req {
100 u8 sel_cmd;
101 u8 b2;
102 u8 nfcid1[4];
103 u8 bcc;
104} __packed;
105
106struct digital_sensb_req {
107 u8 cmd;
108 u8 afi;
109 u8 param;
110} __packed;
111
112struct digital_sensb_res {
113 u8 cmd;
114 u8 nfcid0[4];
115 u8 app_data[4];
116 u8 proto_info[3];
117} __packed;
118
119struct digital_attrib_req {
120 u8 cmd;
121 u8 nfcid0[4];
122 u8 param1;
123 u8 param2;
124 u8 param3;
125 u8 param4;
126} __packed;
127
128struct digital_attrib_res {
129 u8 mbli_did;
130} __packed;
131
132struct digital_sensf_req {
133 u8 cmd;
134 u8 sc1;
135 u8 sc2;
136 u8 rc;
137 u8 tsn;
138} __packed;
139
140struct digital_sensf_res {
141 u8 cmd;
142 u8 nfcid2[8];
143 u8 pad0[2];
144 u8 pad1[3];
145 u8 mrti_check;
146 u8 mrti_update;
147 u8 pad2;
148 u8 rd[2];
149} __packed;
150
151struct digital_iso15693_inv_req {
152 u8 flags;
153 u8 cmd;
154 u8 mask_len;
155 u64 mask;
156} __packed;
157
158struct digital_iso15693_inv_res {
159 u8 flags;
160 u8 dsfid;
161 u64 uid;
162} __packed;
163
164static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
165 struct nfc_target *target);
166
167int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev,
168 struct sk_buff *skb)
169{
170 u8 pcb;
171 u8 block_type;
172
173 if (skb->len < 1)
174 return -EIO;
175
176 pcb = *skb->data;
177 block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb);
178
179 /* No support fo R-block nor S-block */
180 if (block_type != DIGITAL_ISO_DEP_I_BLOCK) {
181 pr_err("ISO_DEP R-block and S-block not supported\n");
182 return -EIO;
183 }
184
185 if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) {
186 pr_err("DID field in ISO_DEP PCB not supported\n");
187 return -EIO;
188 }
189
190 skb_pull(skb, 1);
191
192 return 0;
193}
194
195int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev,
196 struct sk_buff *skb)
197{
198 /*
199 * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must
200 * not be greater than remote FSC
201 */
202 if (skb->len + 3 > ddev->target_fsc)
203 return -EIO;
204
205 skb_push(skb, 1);
206
207 *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni;
208
209 ddev->curr_nfc_dep_pni =
210 DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1);
211
212 return 0;
213}
214
215static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg,
216 struct sk_buff *resp)
217{
218 struct nfc_target *target = arg;
219 u8 fsdi;
220 int rc;
221
222 if (IS_ERR(resp)) {
223 rc = PTR_ERR(resp);
224 resp = NULL;
225 goto exit;
226 }
227
228 if (resp->len < 2) {
229 rc = -EIO;
230 goto exit;
231 }
232
233 fsdi = DIGITAL_ATS_FSCI(resp->data[1]);
234 if (fsdi >= 8)
235 ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
236 else
237 ddev->target_fsc = digital_ats_fsc[fsdi];
238
239 ddev->curr_nfc_dep_pni = 0;
240
241 rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443);
242
243exit:
244 dev_kfree_skb(resp);
245 kfree(target);
246
247 if (rc)
248 digital_poll_next_tech(ddev);
249}
250
251static int digital_in_send_rats(struct nfc_digital_dev *ddev,
252 struct nfc_target *target)
253{
254 int rc;
255 struct sk_buff *skb;
256
257 skb = digital_skb_alloc(ddev, 2);
258 if (!skb)
259 return -ENOMEM;
260
261 skb_put_u8(skb, DIGITAL_RATS_BYTE1);
262 skb_put_u8(skb, DIGITAL_RATS_PARAM);
263
264 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats,
265 target);
266 if (rc)
267 kfree_skb(skb);
268
269 return rc;
270}
271
272static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
273 struct sk_buff *resp)
274{
275 struct nfc_target *target = arg;
276 int rc;
277 u8 sel_res;
278 u8 nfc_proto;
279
280 if (IS_ERR(resp)) {
281 rc = PTR_ERR(resp);
282 resp = NULL;
283 goto exit;
284 }
285
286 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
287 rc = digital_skb_check_crc_a(resp);
288 if (rc) {
289 PROTOCOL_ERR("4.4.1.3");
290 goto exit;
291 }
292 }
293
294 if (resp->len != DIGITAL_SEL_RES_LEN) {
295 rc = -EIO;
296 goto exit;
297 }
298
299 sel_res = resp->data[0];
300
301 if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) {
302 rc = digital_in_send_sdd_req(ddev, target);
303 if (rc)
304 goto exit;
305
306 goto exit_free_skb;
307 }
308
309 target->sel_res = sel_res;
310
311 if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
312 nfc_proto = NFC_PROTO_MIFARE;
313 } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
314 nfc_proto = NFC_PROTO_NFC_DEP;
315 } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) {
316 rc = digital_in_send_rats(ddev, target);
317 if (rc)
318 goto exit;
319 /*
320 * Skip target_found and don't free it for now. This will be
321 * done when receiving the ATS
322 */
323 goto exit_free_skb;
324 } else {
325 rc = -EOPNOTSUPP;
326 goto exit;
327 }
328
329 rc = digital_target_found(ddev, target, nfc_proto);
330
331exit:
332 kfree(target);
333
334exit_free_skb:
335 dev_kfree_skb(resp);
336
337 if (rc)
338 digital_poll_next_tech(ddev);
339}
340
341static int digital_in_send_sel_req(struct nfc_digital_dev *ddev,
342 struct nfc_target *target,
343 struct digital_sdd_res *sdd_res)
344{
345 struct sk_buff *skb;
346 struct digital_sel_req *sel_req;
347 u8 sel_cmd;
348 int rc;
349
350 skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req));
351 if (!skb)
352 return -ENOMEM;
353
354 skb_put(skb, sizeof(struct digital_sel_req));
355 sel_req = (struct digital_sel_req *)skb->data;
356
357 if (target->nfcid1_len <= 4)
358 sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
359 else if (target->nfcid1_len < 10)
360 sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
361 else
362 sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
363
364 sel_req->sel_cmd = sel_cmd;
365 sel_req->b2 = 0x70;
366 memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4);
367 sel_req->bcc = sdd_res->bcc;
368
369 if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
370 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
371 NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
372 if (rc)
373 goto exit;
374 } else {
375 digital_skb_add_crc_a(skb);
376 }
377
378 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res,
379 target);
380exit:
381 if (rc)
382 kfree_skb(skb);
383
384 return rc;
385}
386
387static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg,
388 struct sk_buff *resp)
389{
390 struct nfc_target *target = arg;
391 struct digital_sdd_res *sdd_res;
392 int rc;
393 u8 offset, size;
394 u8 i, bcc;
395
396 if (IS_ERR(resp)) {
397 rc = PTR_ERR(resp);
398 resp = NULL;
399 goto exit;
400 }
401
402 if (resp->len < DIGITAL_SDD_RES_LEN) {
403 PROTOCOL_ERR("4.7.2.8");
404 rc = -EINVAL;
405 goto exit;
406 }
407
408 sdd_res = (struct digital_sdd_res *)resp->data;
409
410 for (i = 0, bcc = 0; i < 4; i++)
411 bcc ^= sdd_res->nfcid1[i];
412
413 if (bcc != sdd_res->bcc) {
414 PROTOCOL_ERR("4.7.2.6");
415 rc = -EINVAL;
416 goto exit;
417 }
418
419 if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) {
420 offset = 1;
421 size = 3;
422 } else {
423 offset = 0;
424 size = 4;
425 }
426
427 memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset,
428 size);
429 target->nfcid1_len += size;
430
431 rc = digital_in_send_sel_req(ddev, target, sdd_res);
432
433exit:
434 dev_kfree_skb(resp);
435
436 if (rc) {
437 kfree(target);
438 digital_poll_next_tech(ddev);
439 }
440}
441
442static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
443 struct nfc_target *target)
444{
445 int rc;
446 struct sk_buff *skb;
447 u8 sel_cmd;
448
449 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
450 NFC_DIGITAL_FRAMING_NFCA_STANDARD);
451 if (rc)
452 return rc;
453
454 skb = digital_skb_alloc(ddev, 2);
455 if (!skb)
456 return -ENOMEM;
457
458 if (target->nfcid1_len == 0)
459 sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
460 else if (target->nfcid1_len == 3)
461 sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
462 else
463 sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
464
465 skb_put_u8(skb, sel_cmd);
466 skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR);
467
468 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res,
469 target);
470 if (rc)
471 kfree_skb(skb);
472
473 return rc;
474}
475
476static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg,
477 struct sk_buff *resp)
478{
479 struct nfc_target *target = NULL;
480 int rc;
481
482 if (IS_ERR(resp)) {
483 rc = PTR_ERR(resp);
484 resp = NULL;
485 goto exit;
486 }
487
488 if (resp->len < sizeof(u16)) {
489 rc = -EIO;
490 goto exit;
491 }
492
493 target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
494 if (!target) {
495 rc = -ENOMEM;
496 goto exit;
497 }
498
499 target->sens_res = __le16_to_cpu(*(__le16 *)resp->data);
500
501 if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) {
502 PROTOCOL_ERR("4.6.3.3");
503 rc = -EINVAL;
504 goto exit;
505 }
506
507 if (DIGITAL_SENS_RES_IS_T1T(target->sens_res))
508 rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL);
509 else
510 rc = digital_in_send_sdd_req(ddev, target);
511
512exit:
513 dev_kfree_skb(resp);
514
515 if (rc) {
516 kfree(target);
517 digital_poll_next_tech(ddev);
518 }
519}
520
521int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech)
522{
523 struct sk_buff *skb;
524 int rc;
525
526 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
527 NFC_DIGITAL_RF_TECH_106A);
528 if (rc)
529 return rc;
530
531 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
532 NFC_DIGITAL_FRAMING_NFCA_SHORT);
533 if (rc)
534 return rc;
535
536 skb = digital_skb_alloc(ddev, 1);
537 if (!skb)
538 return -ENOMEM;
539
540 skb_put_u8(skb, DIGITAL_CMD_SENS_REQ);
541
542 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL);
543 if (rc)
544 kfree_skb(skb);
545
546 return rc;
547}
548
549int digital_in_recv_mifare_res(struct sk_buff *resp)
550{
551 /* Successful READ command response is 16 data bytes + 2 CRC bytes long.
552 * Since the driver can't differentiate a ACK/NACK response from a valid
553 * READ response, the CRC calculation must be handled at digital level
554 * even if the driver supports it for this technology.
555 */
556 if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) {
557 if (digital_skb_check_crc_a(resp)) {
558 PROTOCOL_ERR("9.4.1.2");
559 return -EIO;
560 }
561
562 return 0;
563 }
564
565 /* ACK response (i.e. successful WRITE). */
566 if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) {
567 resp->data[0] = 0;
568 return 0;
569 }
570
571 /* NACK and any other responses are treated as error. */
572 return -EIO;
573}
574
575static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg,
576 struct sk_buff *resp)
577{
578 struct nfc_target *target = arg;
579 struct digital_attrib_res *attrib_res;
580 int rc;
581
582 if (IS_ERR(resp)) {
583 rc = PTR_ERR(resp);
584 resp = NULL;
585 goto exit;
586 }
587
588 if (resp->len < sizeof(*attrib_res)) {
589 PROTOCOL_ERR("12.6.2");
590 rc = -EIO;
591 goto exit;
592 }
593
594 attrib_res = (struct digital_attrib_res *)resp->data;
595
596 if (attrib_res->mbli_did & 0x0f) {
597 PROTOCOL_ERR("12.6.2.1");
598 rc = -EIO;
599 goto exit;
600 }
601
602 rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B);
603
604exit:
605 dev_kfree_skb(resp);
606 kfree(target);
607
608 if (rc)
609 digital_poll_next_tech(ddev);
610}
611
612static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev,
613 struct nfc_target *target,
614 struct digital_sensb_res *sensb_res)
615{
616 struct digital_attrib_req *attrib_req;
617 struct sk_buff *skb;
618 int rc;
619
620 skb = digital_skb_alloc(ddev, sizeof(*attrib_req));
621 if (!skb)
622 return -ENOMEM;
623
624 attrib_req = skb_put(skb, sizeof(*attrib_req));
625
626 attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ;
627 memcpy(attrib_req->nfcid0, sensb_res->nfcid0,
628 sizeof(attrib_req->nfcid0));
629 attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT |
630 DIGITAL_ATTRIB_P1_TR1_DEFAULT;
631 attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 |
632 DIGITAL_ATTRIB_P2_POLL_LISTEN_1 |
633 DIGITAL_ATTRIB_P2_MAX_FRAME_256;
634 attrib_req->param3 = sensb_res->proto_info[1] & 0x07;
635 attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0);
636
637 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res,
638 target);
639 if (rc)
640 kfree_skb(skb);
641
642 return rc;
643}
644
645static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg,
646 struct sk_buff *resp)
647{
648 struct nfc_target *target = NULL;
649 struct digital_sensb_res *sensb_res;
650 u8 fsci;
651 int rc;
652
653 if (IS_ERR(resp)) {
654 rc = PTR_ERR(resp);
655 resp = NULL;
656 goto exit;
657 }
658
659 if (resp->len != sizeof(*sensb_res)) {
660 PROTOCOL_ERR("5.6.2.1");
661 rc = -EIO;
662 goto exit;
663 }
664
665 sensb_res = (struct digital_sensb_res *)resp->data;
666
667 if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) {
668 PROTOCOL_ERR("5.6.2");
669 rc = -EIO;
670 goto exit;
671 }
672
673 if (!(sensb_res->proto_info[1] & BIT(0))) {
674 PROTOCOL_ERR("5.6.2.12");
675 rc = -EIO;
676 goto exit;
677 }
678
679 if (sensb_res->proto_info[1] & BIT(3)) {
680 PROTOCOL_ERR("5.6.2.16");
681 rc = -EIO;
682 goto exit;
683 }
684
685 fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]);
686 if (fsci >= 8)
687 ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
688 else
689 ddev->target_fsc = digital_ats_fsc[fsci];
690
691 target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
692 if (!target) {
693 rc = -ENOMEM;
694 goto exit;
695 }
696
697 rc = digital_in_send_attrib_req(ddev, target, sensb_res);
698
699exit:
700 dev_kfree_skb(resp);
701
702 if (rc) {
703 kfree(target);
704 digital_poll_next_tech(ddev);
705 }
706}
707
708int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech)
709{
710 struct digital_sensb_req *sensb_req;
711 struct sk_buff *skb;
712 int rc;
713
714 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
715 NFC_DIGITAL_RF_TECH_106B);
716 if (rc)
717 return rc;
718
719 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
720 NFC_DIGITAL_FRAMING_NFCB);
721 if (rc)
722 return rc;
723
724 skb = digital_skb_alloc(ddev, sizeof(*sensb_req));
725 if (!skb)
726 return -ENOMEM;
727
728 sensb_req = skb_put(skb, sizeof(*sensb_req));
729
730 sensb_req->cmd = DIGITAL_CMD_SENSB_REQ;
731 sensb_req->afi = 0x00; /* All families and sub-families */
732 sensb_req->param = DIGITAL_SENSB_N(0);
733
734 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res,
735 NULL);
736 if (rc)
737 kfree_skb(skb);
738
739 return rc;
740}
741
742static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg,
743 struct sk_buff *resp)
744{
745 int rc;
746 u8 proto;
747 struct nfc_target target;
748 struct digital_sensf_res *sensf_res;
749
750 if (IS_ERR(resp)) {
751 rc = PTR_ERR(resp);
752 resp = NULL;
753 goto exit;
754 }
755
756 if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) {
757 rc = -EIO;
758 goto exit;
759 }
760
761 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
762 rc = digital_skb_check_crc_f(resp);
763 if (rc) {
764 PROTOCOL_ERR("6.4.1.8");
765 goto exit;
766 }
767 }
768
769 skb_pull(resp, 1);
770
771 memset(&target, 0, sizeof(struct nfc_target));
772
773 sensf_res = (struct digital_sensf_res *)resp->data;
774
775 memcpy(target.sensf_res, sensf_res, resp->len);
776 target.sensf_res_len = resp->len;
777
778 memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE);
779 target.nfcid2_len = NFC_NFCID2_MAXSIZE;
780
781 if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 &&
782 target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2)
783 proto = NFC_PROTO_NFC_DEP;
784 else
785 proto = NFC_PROTO_FELICA;
786
787 rc = digital_target_found(ddev, &target, proto);
788
789exit:
790 dev_kfree_skb(resp);
791
792 if (rc)
793 digital_poll_next_tech(ddev);
794}
795
796int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
797{
798 struct digital_sensf_req *sensf_req;
799 struct sk_buff *skb;
800 int rc;
801 u8 size;
802
803 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
804 if (rc)
805 return rc;
806
807 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
808 NFC_DIGITAL_FRAMING_NFCF);
809 if (rc)
810 return rc;
811
812 size = sizeof(struct digital_sensf_req);
813
814 skb = digital_skb_alloc(ddev, size);
815 if (!skb)
816 return -ENOMEM;
817
818 skb_put(skb, size);
819
820 sensf_req = (struct digital_sensf_req *)skb->data;
821 sensf_req->cmd = DIGITAL_CMD_SENSF_REQ;
822 sensf_req->sc1 = 0xFF;
823 sensf_req->sc2 = 0xFF;
824 sensf_req->rc = 0;
825 sensf_req->tsn = 0;
826
827 *(u8 *)skb_push(skb, 1) = size + 1;
828
829 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev))
830 digital_skb_add_crc_f(skb);
831
832 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res,
833 NULL);
834 if (rc)
835 kfree_skb(skb);
836
837 return rc;
838}
839
840static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev,
841 void *arg, struct sk_buff *resp)
842{
843 struct digital_iso15693_inv_res *res;
844 struct nfc_target *target = NULL;
845 int rc;
846
847 if (IS_ERR(resp)) {
848 rc = PTR_ERR(resp);
849 resp = NULL;
850 goto out_free_skb;
851 }
852
853 if (resp->len != sizeof(*res)) {
854 rc = -EIO;
855 goto out_free_skb;
856 }
857
858 res = (struct digital_iso15693_inv_res *)resp->data;
859
860 if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) {
861 PROTOCOL_ERR("ISO15693 - 10.3.1");
862 rc = -EINVAL;
863 goto out_free_skb;
864 }
865
866 target = kzalloc(sizeof(*target), GFP_KERNEL);
867 if (!target) {
868 rc = -ENOMEM;
869 goto out_free_skb;
870 }
871
872 target->is_iso15693 = 1;
873 target->iso15693_dsfid = res->dsfid;
874 memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid));
875
876 rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693);
877
878 kfree(target);
879
880out_free_skb:
881 dev_kfree_skb(resp);
882
883 if (rc)
884 digital_poll_next_tech(ddev);
885}
886
887int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech)
888{
889 struct digital_iso15693_inv_req *req;
890 struct sk_buff *skb;
891 int rc;
892
893 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
894 NFC_DIGITAL_RF_TECH_ISO15693);
895 if (rc)
896 return rc;
897
898 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
899 NFC_DIGITAL_FRAMING_ISO15693_INVENTORY);
900 if (rc)
901 return rc;
902
903 skb = digital_skb_alloc(ddev, sizeof(*req));
904 if (!skb)
905 return -ENOMEM;
906
907 skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */
908 req = (struct digital_iso15693_inv_req *)skb->data;
909
910 /* Single sub-carrier, high data rate, no AFI, single slot
911 * Inventory command
912 */
913 req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE |
914 DIGITAL_ISO15693_REQ_FLAG_INVENTORY |
915 DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS;
916 req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ;
917 req->mask_len = 0;
918
919 rc = digital_in_send_cmd(ddev, skb, 30,
920 digital_in_recv_iso15693_inv_res, NULL);
921 if (rc)
922 kfree_skb(skb);
923
924 return rc;
925}
926
927static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
928{
929 struct sk_buff *skb;
930 int rc;
931
932 skb = digital_skb_alloc(ddev, 1);
933 if (!skb)
934 return -ENOMEM;
935
936 skb_put_u8(skb, DIGITAL_SEL_RES_NFC_DEP);
937
938 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
939 digital_skb_add_crc_a(skb);
940
941 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
942 NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE);
943 if (rc) {
944 kfree_skb(skb);
945 return rc;
946 }
947
948 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req,
949 NULL);
950 if (rc)
951 kfree_skb(skb);
952
953 return rc;
954}
955
956static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg,
957 struct sk_buff *resp)
958{
959 int rc;
960
961 if (IS_ERR(resp)) {
962 rc = PTR_ERR(resp);
963 resp = NULL;
964 goto exit;
965 }
966
967 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
968 rc = digital_skb_check_crc_a(resp);
969 if (rc) {
970 PROTOCOL_ERR("4.4.1.3");
971 goto exit;
972 }
973 }
974
975 /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */
976
977 rc = digital_tg_send_sel_res(ddev);
978
979exit:
980 if (rc)
981 digital_poll_next_tech(ddev);
982
983 dev_kfree_skb(resp);
984}
985
986static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev)
987{
988 struct sk_buff *skb;
989 struct digital_sdd_res *sdd_res;
990 int rc, i;
991
992 skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res));
993 if (!skb)
994 return -ENOMEM;
995
996 skb_put(skb, sizeof(struct digital_sdd_res));
997 sdd_res = (struct digital_sdd_res *)skb->data;
998
999 sdd_res->nfcid1[0] = 0x08;
1000 get_random_bytes(sdd_res->nfcid1 + 1, 3);
1001
1002 sdd_res->bcc = 0;
1003 for (i = 0; i < 4; i++)
1004 sdd_res->bcc ^= sdd_res->nfcid1[i];
1005
1006 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1007 NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
1008 if (rc) {
1009 kfree_skb(skb);
1010 return rc;
1011 }
1012
1013 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req,
1014 NULL);
1015 if (rc)
1016 kfree_skb(skb);
1017
1018 return rc;
1019}
1020
1021static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg,
1022 struct sk_buff *resp)
1023{
1024 u8 *sdd_req;
1025 int rc;
1026
1027 if (IS_ERR(resp)) {
1028 rc = PTR_ERR(resp);
1029 resp = NULL;
1030 goto exit;
1031 }
1032
1033 sdd_req = resp->data;
1034
1035 if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 ||
1036 sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) {
1037 rc = -EINVAL;
1038 goto exit;
1039 }
1040
1041 rc = digital_tg_send_sdd_res(ddev);
1042
1043exit:
1044 if (rc)
1045 digital_poll_next_tech(ddev);
1046
1047 dev_kfree_skb(resp);
1048}
1049
1050static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev)
1051{
1052 struct sk_buff *skb;
1053 u8 *sens_res;
1054 int rc;
1055
1056 skb = digital_skb_alloc(ddev, 2);
1057 if (!skb)
1058 return -ENOMEM;
1059
1060 sens_res = skb_put(skb, 2);
1061
1062 sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF;
1063 sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF;
1064
1065 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1066 NFC_DIGITAL_FRAMING_NFCA_STANDARD);
1067 if (rc) {
1068 kfree_skb(skb);
1069 return rc;
1070 }
1071
1072 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req,
1073 NULL);
1074 if (rc)
1075 kfree_skb(skb);
1076
1077 return rc;
1078}
1079
1080void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
1081 struct sk_buff *resp)
1082{
1083 u8 sens_req;
1084 int rc;
1085
1086 if (IS_ERR(resp)) {
1087 rc = PTR_ERR(resp);
1088 resp = NULL;
1089 goto exit;
1090 }
1091
1092 sens_req = resp->data[0];
1093
1094 if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ &&
1095 sens_req != DIGITAL_CMD_ALL_REQ)) {
1096 rc = -EINVAL;
1097 goto exit;
1098 }
1099
1100 rc = digital_tg_send_sens_res(ddev);
1101
1102exit:
1103 if (rc)
1104 digital_poll_next_tech(ddev);
1105
1106 dev_kfree_skb(resp);
1107}
1108
1109static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev,
1110 void *arg, struct sk_buff *resp)
1111{
1112 if (!IS_ERR(resp) && (resp->len >= 2) &&
1113 (resp->data[1] == DIGITAL_CMD_SENSF_REQ))
1114 digital_tg_recv_sensf_req(ddev, arg, resp);
1115 else
1116 digital_tg_recv_atr_req(ddev, arg, resp);
1117
1118 return;
1119}
1120
1121static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
1122 struct digital_sensf_req *sensf_req)
1123{
1124 struct sk_buff *skb;
1125 u8 size;
1126 int rc;
1127 struct digital_sensf_res *sensf_res;
1128
1129 size = sizeof(struct digital_sensf_res);
1130
1131 if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE)
1132 size -= sizeof(sensf_res->rd);
1133
1134 skb = digital_skb_alloc(ddev, size);
1135 if (!skb)
1136 return -ENOMEM;
1137
1138 skb_put(skb, size);
1139
1140 sensf_res = (struct digital_sensf_res *)skb->data;
1141
1142 memset(sensf_res, 0, size);
1143
1144 sensf_res->cmd = DIGITAL_CMD_SENSF_RES;
1145 sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
1146 sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
1147 get_random_bytes(&sensf_res->nfcid2[2], 6);
1148
1149 switch (sensf_req->rc) {
1150 case DIGITAL_SENSF_REQ_RC_SC:
1151 sensf_res->rd[0] = sensf_req->sc1;
1152 sensf_res->rd[1] = sensf_req->sc2;
1153 break;
1154 case DIGITAL_SENSF_REQ_RC_AP:
1155 sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1;
1156 sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2;
1157 break;
1158 }
1159
1160 *(u8 *)skb_push(skb, sizeof(u8)) = size + 1;
1161
1162 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
1163 digital_skb_add_crc_f(skb);
1164
1165 rc = digital_tg_send_cmd(ddev, skb, 300,
1166 digital_tg_recv_atr_or_sensf_req, NULL);
1167 if (rc)
1168 kfree_skb(skb);
1169
1170 return rc;
1171}
1172
1173void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
1174 struct sk_buff *resp)
1175{
1176 struct digital_sensf_req *sensf_req;
1177 int rc;
1178
1179 if (IS_ERR(resp)) {
1180 rc = PTR_ERR(resp);
1181 resp = NULL;
1182 goto exit;
1183 }
1184
1185 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
1186 rc = digital_skb_check_crc_f(resp);
1187 if (rc) {
1188 PROTOCOL_ERR("6.4.1.8");
1189 goto exit;
1190 }
1191 }
1192
1193 if (resp->len != sizeof(struct digital_sensf_req) + 1) {
1194 rc = -EINVAL;
1195 goto exit;
1196 }
1197
1198 skb_pull(resp, 1);
1199 sensf_req = (struct digital_sensf_req *)resp->data;
1200
1201 if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) {
1202 rc = -EINVAL;
1203 goto exit;
1204 }
1205
1206 rc = digital_tg_send_sensf_res(ddev, sensf_req);
1207
1208exit:
1209 if (rc)
1210 digital_poll_next_tech(ddev);
1211
1212 dev_kfree_skb(resp);
1213}
1214
1215static int digital_tg_config_nfca(struct nfc_digital_dev *ddev)
1216{
1217 int rc;
1218
1219 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1220 NFC_DIGITAL_RF_TECH_106A);
1221 if (rc)
1222 return rc;
1223
1224 return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1225 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1226}
1227
1228int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech)
1229{
1230 int rc;
1231
1232 rc = digital_tg_config_nfca(ddev);
1233 if (rc)
1234 return rc;
1235
1236 return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL);
1237}
1238
1239static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
1240{
1241 int rc;
1242
1243 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
1244 if (rc)
1245 return rc;
1246
1247 return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1248 NFC_DIGITAL_FRAMING_NFCF_NFC_DEP);
1249}
1250
1251int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
1252{
1253 int rc;
1254
1255 rc = digital_tg_config_nfcf(ddev, rf_tech);
1256 if (rc)
1257 return rc;
1258
1259 return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, NULL);
1260}
1261
1262void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg,
1263 struct sk_buff *resp)
1264{
1265 u8 rf_tech;
1266 int rc;
1267
1268 if (IS_ERR(resp)) {
1269 resp = NULL;
1270 goto exit_free_skb;
1271 }
1272
1273 rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech);
1274 if (rc)
1275 goto exit_free_skb;
1276
1277 switch (rf_tech) {
1278 case NFC_DIGITAL_RF_TECH_106A:
1279 rc = digital_tg_config_nfca(ddev);
1280 if (rc)
1281 goto exit_free_skb;
1282 digital_tg_recv_sens_req(ddev, arg, resp);
1283 break;
1284 case NFC_DIGITAL_RF_TECH_212F:
1285 case NFC_DIGITAL_RF_TECH_424F:
1286 rc = digital_tg_config_nfcf(ddev, rf_tech);
1287 if (rc)
1288 goto exit_free_skb;
1289 digital_tg_recv_sensf_req(ddev, arg, resp);
1290 break;
1291 default:
1292 goto exit_free_skb;
1293 }
1294
1295 return;
1296
1297exit_free_skb:
1298 digital_poll_next_tech(ddev);
1299 dev_kfree_skb(resp);
1300}