1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
4 */
5
6 #include <net/nfc/hci.h>
7
8 #include "st21nfca.h"
9
10 #define ST21NFCA_NFCIP1_INITIATOR 0x00
11 #define ST21NFCA_NFCIP1_REQ 0xd4
12 #define ST21NFCA_NFCIP1_RES 0xd5
13 #define ST21NFCA_NFCIP1_ATR_REQ 0x00
14 #define ST21NFCA_NFCIP1_ATR_RES 0x01
15 #define ST21NFCA_NFCIP1_PSL_REQ 0x04
16 #define ST21NFCA_NFCIP1_PSL_RES 0x05
17 #define ST21NFCA_NFCIP1_DEP_REQ 0x06
18 #define ST21NFCA_NFCIP1_DEP_RES 0x07
19
20 #define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03)
21 #define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0)
22 #define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
23 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
24 #define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04)
25 #define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08)
26 #define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10
27
28 #define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
29 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
30
31 #define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00
32 #define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40
33 #define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80
34
35 #define ST21NFCA_ATR_REQ_MIN_SIZE 17
36 #define ST21NFCA_ATR_REQ_MAX_SIZE 65
37 #define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30
38 #define ST21NFCA_GB_BIT 0x02
39
40 #define ST21NFCA_EVT_SEND_DATA 0x10
41 #define ST21NFCA_EVT_FIELD_ON 0x11
42 #define ST21NFCA_EVT_CARD_DEACTIVATED 0x12
43 #define ST21NFCA_EVT_CARD_ACTIVATED 0x13
44 #define ST21NFCA_EVT_FIELD_OFF 0x14
45
46 #define ST21NFCA_EVT_CARD_F_BITRATE 0x16
47 #define ST21NFCA_EVT_READER_F_BITRATE 0x13
48 #define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38)
49 #define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07)
50 #define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4)
51 #define ST21NFCA_CARD_BITRATE_212 0x01
52 #define ST21NFCA_CARD_BITRATE_424 0x02
53
54 #define ST21NFCA_DEFAULT_TIMEOUT 0x0a
55
56
57 #define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \
58 __LINE__, req)
59
60 struct st21nfca_atr_req {
61 u8 length;
62 u8 cmd0;
63 u8 cmd1;
64 u8 nfcid3[NFC_NFCID3_MAXSIZE];
65 u8 did;
66 u8 bsi;
67 u8 bri;
68 u8 ppi;
69 u8 gbi[];
70 } __packed;
71
72 struct st21nfca_atr_res {
73 u8 length;
74 u8 cmd0;
75 u8 cmd1;
76 u8 nfcid3[NFC_NFCID3_MAXSIZE];
77 u8 did;
78 u8 bsi;
79 u8 bri;
80 u8 to;
81 u8 ppi;
82 u8 gbi[];
83 } __packed;
84
85 struct st21nfca_psl_req {
86 u8 length;
87 u8 cmd0;
88 u8 cmd1;
89 u8 did;
90 u8 brs;
91 u8 fsl;
92 } __packed;
93
94 struct st21nfca_psl_res {
95 u8 length;
96 u8 cmd0;
97 u8 cmd1;
98 u8 did;
99 } __packed;
100
101 struct st21nfca_dep_req_res {
102 u8 length;
103 u8 cmd0;
104 u8 cmd1;
105 u8 pfb;
106 u8 did;
107 u8 nad;
108 } __packed;
109
st21nfca_tx_work(struct work_struct * work)110 static void st21nfca_tx_work(struct work_struct *work)
111 {
112 struct st21nfca_hci_info *info = container_of(work,
113 struct st21nfca_hci_info,
114 dep_info.tx_work);
115
116 struct nfc_dev *dev;
117 struct sk_buff *skb;
118
119 if (info) {
120 dev = info->hdev->ndev;
121 skb = info->dep_info.tx_pending;
122
123 device_lock(&dev->dev);
124
125 nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE,
126 ST21NFCA_WR_XCHG_DATA, skb->data, skb->len,
127 info->async_cb, info);
128 device_unlock(&dev->dev);
129 kfree_skb(skb);
130 }
131 }
132
st21nfca_im_send_pdu(struct st21nfca_hci_info * info,struct sk_buff * skb)133 static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info,
134 struct sk_buff *skb)
135 {
136 info->dep_info.tx_pending = skb;
137 schedule_work(&info->dep_info.tx_work);
138 }
139
st21nfca_tm_send_atr_res(struct nfc_hci_dev * hdev,struct st21nfca_atr_req * atr_req)140 static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev,
141 struct st21nfca_atr_req *atr_req)
142 {
143 struct st21nfca_atr_res *atr_res;
144 struct sk_buff *skb;
145 size_t gb_len;
146 int r;
147 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
148
149 gb_len = atr_req->length - sizeof(struct st21nfca_atr_req);
150 skb = alloc_skb(atr_req->length + 1, GFP_KERNEL);
151 if (!skb)
152 return -ENOMEM;
153
154 skb_put(skb, sizeof(struct st21nfca_atr_res));
155
156 atr_res = (struct st21nfca_atr_res *)skb->data;
157 memset(atr_res, 0, sizeof(struct st21nfca_atr_res));
158
159 atr_res->length = atr_req->length + 1;
160 atr_res->cmd0 = ST21NFCA_NFCIP1_RES;
161 atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES;
162
163 memcpy(atr_res->nfcid3, atr_req->nfcid3, 6);
164 atr_res->bsi = 0x00;
165 atr_res->bri = 0x00;
166 atr_res->to = ST21NFCA_DEFAULT_TIMEOUT;
167 atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
168
169 if (gb_len) {
170 skb_put(skb, gb_len);
171
172 atr_res->ppi |= ST21NFCA_GB_BIT;
173 memcpy(atr_res->gbi, atr_req->gbi, gb_len);
174 r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi,
175 gb_len);
176 if (r < 0) {
177 kfree_skb(skb);
178 return r;
179 }
180 }
181
182 info->dep_info.curr_nfc_dep_pni = 0;
183
184 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
185 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
186 kfree_skb(skb);
187 return r;
188 }
189
st21nfca_tm_recv_atr_req(struct nfc_hci_dev * hdev,struct sk_buff * skb)190 static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev,
191 struct sk_buff *skb)
192 {
193 struct st21nfca_atr_req *atr_req;
194 size_t gb_len;
195 int r;
196
197 skb_trim(skb, skb->len - 1);
198
199 if (!skb->len)
200 return -EIO;
201
202 if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE)
203 return -EPROTO;
204
205 atr_req = (struct st21nfca_atr_req *)skb->data;
206
207 if (atr_req->length < sizeof(struct st21nfca_atr_req))
208 return -EPROTO;
209
210 r = st21nfca_tm_send_atr_res(hdev, atr_req);
211 if (r)
212 return r;
213
214 gb_len = skb->len - sizeof(struct st21nfca_atr_req);
215
216 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
217 NFC_COMM_PASSIVE, atr_req->gbi, gb_len);
218 if (r)
219 return r;
220
221 return 0;
222 }
223
st21nfca_tm_send_psl_res(struct nfc_hci_dev * hdev,struct st21nfca_psl_req * psl_req)224 static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev,
225 struct st21nfca_psl_req *psl_req)
226 {
227 struct st21nfca_psl_res *psl_res;
228 struct sk_buff *skb;
229 u8 bitrate[2] = {0, 0};
230 int r;
231
232 skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL);
233 if (!skb)
234 return -ENOMEM;
235 skb_put(skb, sizeof(struct st21nfca_psl_res));
236
237 psl_res = (struct st21nfca_psl_res *)skb->data;
238
239 psl_res->length = sizeof(struct st21nfca_psl_res);
240 psl_res->cmd0 = ST21NFCA_NFCIP1_RES;
241 psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES;
242 psl_res->did = psl_req->did;
243
244 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
245 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
246 if (r < 0)
247 goto error;
248
249 /*
250 * ST21NFCA only support P2P passive.
251 * PSL_REQ BRS value != 0 has only a meaning to
252 * change technology to type F.
253 * We change to BITRATE 424Kbits.
254 * In other case switch to BITRATE 106Kbits.
255 */
256 if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) &&
257 ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) {
258 bitrate[0] = ST21NFCA_CARD_BITRATE_424;
259 bitrate[1] = ST21NFCA_CARD_BITRATE_424;
260 }
261
262 /* Send an event to change bitrate change event to card f */
263 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
264 ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2);
265 error:
266 kfree_skb(skb);
267 return r;
268 }
269
st21nfca_tm_recv_psl_req(struct nfc_hci_dev * hdev,struct sk_buff * skb)270 static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev,
271 struct sk_buff *skb)
272 {
273 struct st21nfca_psl_req *psl_req;
274
275 skb_trim(skb, skb->len - 1);
276
277 if (!skb->len)
278 return -EIO;
279
280 psl_req = (struct st21nfca_psl_req *)skb->data;
281
282 if (skb->len < sizeof(struct st21nfca_psl_req))
283 return -EIO;
284
285 return st21nfca_tm_send_psl_res(hdev, psl_req);
286 }
287
st21nfca_tm_send_dep_res(struct nfc_hci_dev * hdev,struct sk_buff * skb)288 int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb)
289 {
290 int r;
291 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
292
293 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
294 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES;
295 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_RES;
296 *(u8 *)skb_push(skb, 1) = skb->len;
297
298 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
299 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
300 kfree_skb(skb);
301
302 return r;
303 }
304 EXPORT_SYMBOL(st21nfca_tm_send_dep_res);
305
st21nfca_tm_recv_dep_req(struct nfc_hci_dev * hdev,struct sk_buff * skb)306 static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev,
307 struct sk_buff *skb)
308 {
309 struct st21nfca_dep_req_res *dep_req;
310 u8 size;
311 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
312
313 skb_trim(skb, skb->len - 1);
314
315 size = 4;
316
317 dep_req = (struct st21nfca_dep_req_res *)skb->data;
318 if (skb->len < size)
319 return -EIO;
320
321 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb))
322 size++;
323 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb))
324 size++;
325
326 if (skb->len < size)
327 return -EIO;
328
329 /* Receiving DEP_REQ - Decoding */
330 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) {
331 case ST21NFCA_NFC_DEP_PFB_I_PDU:
332 info->dep_info.curr_nfc_dep_pni =
333 ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb);
334 break;
335 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
336 pr_err("Received a ACK/NACK PDU\n");
337 break;
338 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
339 pr_err("Received a SUPERVISOR PDU\n");
340 break;
341 }
342
343 skb_pull(skb, size);
344
345 return nfc_tm_data_received(hdev->ndev, skb);
346 }
347
st21nfca_tm_event_send_data(struct nfc_hci_dev * hdev,struct sk_buff * skb)348 static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev,
349 struct sk_buff *skb)
350 {
351 u8 cmd0, cmd1;
352 int r;
353
354 cmd0 = skb->data[1];
355 switch (cmd0) {
356 case ST21NFCA_NFCIP1_REQ:
357 cmd1 = skb->data[2];
358 switch (cmd1) {
359 case ST21NFCA_NFCIP1_ATR_REQ:
360 r = st21nfca_tm_recv_atr_req(hdev, skb);
361 break;
362 case ST21NFCA_NFCIP1_PSL_REQ:
363 r = st21nfca_tm_recv_psl_req(hdev, skb);
364 break;
365 case ST21NFCA_NFCIP1_DEP_REQ:
366 r = st21nfca_tm_recv_dep_req(hdev, skb);
367 break;
368 default:
369 return 1;
370 }
371 break;
372 default:
373 return 1;
374 }
375 return r;
376 }
377
378 /*
379 * Returns:
380 * <= 0: driver handled the event, skb consumed
381 * 1: driver does not handle the event, please do standard processing
382 */
st21nfca_dep_event_received(struct nfc_hci_dev * hdev,u8 event,struct sk_buff * skb)383 int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
384 u8 event, struct sk_buff *skb)
385 {
386 int r = 0;
387 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
388
389 pr_debug("dep event: %d\n", event);
390
391 switch (event) {
392 case ST21NFCA_EVT_CARD_ACTIVATED:
393 info->dep_info.curr_nfc_dep_pni = 0;
394 break;
395 case ST21NFCA_EVT_CARD_DEACTIVATED:
396 break;
397 case ST21NFCA_EVT_FIELD_ON:
398 break;
399 case ST21NFCA_EVT_FIELD_OFF:
400 break;
401 case ST21NFCA_EVT_SEND_DATA:
402 r = st21nfca_tm_event_send_data(hdev, skb);
403 if (r < 0)
404 return r;
405 return 0;
406 default:
407 nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n");
408 return 1;
409 }
410 kfree_skb(skb);
411 return r;
412 }
413 EXPORT_SYMBOL(st21nfca_dep_event_received);
414
st21nfca_im_send_psl_req(struct nfc_hci_dev * hdev,u8 did,u8 bsi,u8 bri,u8 lri)415 static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi,
416 u8 bri, u8 lri)
417 {
418 struct sk_buff *skb;
419 struct st21nfca_psl_req *psl_req;
420 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
421
422 skb =
423 alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL);
424 if (!skb)
425 return;
426 skb_reserve(skb, 1);
427
428 skb_put(skb, sizeof(struct st21nfca_psl_req));
429 psl_req = (struct st21nfca_psl_req *) skb->data;
430
431 psl_req->length = sizeof(struct st21nfca_psl_req);
432 psl_req->cmd0 = ST21NFCA_NFCIP1_REQ;
433 psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ;
434 psl_req->did = did;
435 psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03);
436 psl_req->fsl = lri;
437
438 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10;
439
440 st21nfca_im_send_pdu(info, skb);
441 }
442
443 #define ST21NFCA_CB_TYPE_READER_F 1
st21nfca_im_recv_atr_res_cb(void * context,struct sk_buff * skb,int err)444 static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb,
445 int err)
446 {
447 struct st21nfca_hci_info *info = context;
448 struct st21nfca_atr_res *atr_res;
449 int r;
450
451 if (err != 0)
452 return;
453
454 if (!skb)
455 return;
456
457 switch (info->async_cb_type) {
458 case ST21NFCA_CB_TYPE_READER_F:
459 skb_trim(skb, skb->len - 1);
460 atr_res = (struct st21nfca_atr_res *)skb->data;
461 r = nfc_set_remote_general_bytes(info->hdev->ndev,
462 atr_res->gbi,
463 skb->len - sizeof(struct st21nfca_atr_res));
464 if (r < 0)
465 return;
466
467 if (atr_res->to >= 0x0e)
468 info->dep_info.to = 0x0e;
469 else
470 info->dep_info.to = atr_res->to + 1;
471
472 info->dep_info.to |= 0x10;
473
474 r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx,
475 NFC_COMM_PASSIVE, NFC_RF_INITIATOR);
476 if (r < 0)
477 return;
478
479 info->dep_info.curr_nfc_dep_pni = 0;
480 if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri)
481 st21nfca_im_send_psl_req(info->hdev, atr_res->did,
482 atr_res->bsi, atr_res->bri,
483 ST21NFCA_PP2LRI(atr_res->ppi));
484 break;
485 default:
486 kfree_skb(skb);
487 break;
488 }
489 }
490
st21nfca_im_send_atr_req(struct nfc_hci_dev * hdev,u8 * gb,size_t gb_len)491 int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len)
492 {
493 struct sk_buff *skb;
494 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
495 struct st21nfca_atr_req *atr_req;
496 struct nfc_target *target;
497 uint size;
498
499 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
500 size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len;
501 if (size > ST21NFCA_ATR_REQ_MAX_SIZE) {
502 PROTOCOL_ERR("14.6.1.1");
503 return -EINVAL;
504 }
505
506 skb =
507 alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL);
508 if (!skb)
509 return -ENOMEM;
510
511 skb_reserve(skb, 1);
512
513 skb_put(skb, sizeof(struct st21nfca_atr_req));
514
515 atr_req = (struct st21nfca_atr_req *)skb->data;
516 memset(atr_req, 0, sizeof(struct st21nfca_atr_req));
517
518 atr_req->cmd0 = ST21NFCA_NFCIP1_REQ;
519 atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ;
520 memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE);
521 target = hdev->ndev->targets;
522
523 if (target->sensf_res_len > 0)
524 memcpy(atr_req->nfcid3, target->sensf_res,
525 target->sensf_res_len);
526 else
527 get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE);
528
529 atr_req->did = 0x0;
530
531 atr_req->bsi = 0x00;
532 atr_req->bri = 0x00;
533 atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
534 if (gb_len) {
535 atr_req->ppi |= ST21NFCA_GB_BIT;
536 skb_put_data(skb, gb, gb_len);
537 }
538 atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len;
539
540 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */
541
542 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
543 info->async_cb_context = info;
544 info->async_cb = st21nfca_im_recv_atr_res_cb;
545 info->dep_info.bri = atr_req->bri;
546 info->dep_info.bsi = atr_req->bsi;
547 info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi);
548
549 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
550 ST21NFCA_WR_XCHG_DATA, skb->data,
551 skb->len, info->async_cb, info);
552 }
553 EXPORT_SYMBOL(st21nfca_im_send_atr_req);
554
st21nfca_im_recv_dep_res_cb(void * context,struct sk_buff * skb,int err)555 static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
556 int err)
557 {
558 struct st21nfca_hci_info *info = context;
559 struct st21nfca_dep_req_res *dep_res;
560
561 int size;
562
563 if (err != 0)
564 return;
565
566 if (!skb)
567 return;
568
569 switch (info->async_cb_type) {
570 case ST21NFCA_CB_TYPE_READER_F:
571 dep_res = (struct st21nfca_dep_req_res *)skb->data;
572
573 size = 3;
574 if (skb->len < size)
575 goto exit;
576
577 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb))
578 size++;
579 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb))
580 size++;
581
582 if (skb->len < size)
583 goto exit;
584
585 skb_trim(skb, skb->len - 1);
586
587 /* Receiving DEP_REQ - Decoding */
588 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) {
589 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
590 pr_err("Received a ACK/NACK PDU\n");
591 fallthrough;
592 case ST21NFCA_NFC_DEP_PFB_I_PDU:
593 info->dep_info.curr_nfc_dep_pni =
594 ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1);
595 size++;
596 skb_pull(skb, size);
597 nfc_tm_data_received(info->hdev->ndev, skb);
598 break;
599 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
600 pr_err("Received a SUPERVISOR PDU\n");
601 skb_pull(skb, size);
602 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
603 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
604 *(u8 *)skb_push(skb, 1) = skb->len;
605 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10;
606
607 st21nfca_im_send_pdu(info, skb);
608 break;
609 }
610
611 return;
612 default:
613 break;
614 }
615
616 exit:
617 kfree_skb(skb);
618 }
619
st21nfca_im_send_dep_req(struct nfc_hci_dev * hdev,struct sk_buff * skb)620 int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb)
621 {
622 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
623
624 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
625 info->async_cb_context = info;
626 info->async_cb = st21nfca_im_recv_dep_res_cb;
627
628 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
629 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
630 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
631 *(u8 *)skb_push(skb, 1) = skb->len;
632
633 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10;
634
635 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
636 ST21NFCA_WR_XCHG_DATA,
637 skb->data, skb->len,
638 info->async_cb, info);
639 }
640 EXPORT_SYMBOL(st21nfca_im_send_dep_req);
641
st21nfca_dep_init(struct nfc_hci_dev * hdev)642 void st21nfca_dep_init(struct nfc_hci_dev *hdev)
643 {
644 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
645
646 INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work);
647 info->dep_info.curr_nfc_dep_pni = 0;
648 info->dep_info.idx = 0;
649 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
650 }
651 EXPORT_SYMBOL(st21nfca_dep_init);
652
st21nfca_dep_deinit(struct nfc_hci_dev * hdev)653 void st21nfca_dep_deinit(struct nfc_hci_dev *hdev)
654 {
655 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
656
657 cancel_work_sync(&info->dep_info.tx_work);
658 }
659 EXPORT_SYMBOL(st21nfca_dep_deinit);
660