tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include <net/nfc/hci.h>
18
19#include "st21nfca.h"
20#include "st21nfca_dep.h"
21
22#define ST21NFCA_NFCIP1_INITIATOR 0x00
23#define ST21NFCA_NFCIP1_REQ 0xd4
24#define ST21NFCA_NFCIP1_RES 0xd5
25#define ST21NFCA_NFCIP1_ATR_REQ 0x00
26#define ST21NFCA_NFCIP1_ATR_RES 0x01
27#define ST21NFCA_NFCIP1_PSL_REQ 0x04
28#define ST21NFCA_NFCIP1_PSL_RES 0x05
29#define ST21NFCA_NFCIP1_DEP_REQ 0x06
30#define ST21NFCA_NFCIP1_DEP_RES 0x07
31
32#define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03)
33#define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0)
34#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
35 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
36#define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04)
37#define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08)
38#define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10
39
40#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
41 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
42
43#define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00
44#define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40
45#define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80
46
47#define ST21NFCA_ATR_REQ_MIN_SIZE 17
48#define ST21NFCA_ATR_REQ_MAX_SIZE 65
49#define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30
50#define ST21NFCA_GB_BIT 0x02
51
52#define ST21NFCA_EVT_SEND_DATA 0x10
53#define ST21NFCA_EVT_FIELD_ON 0x11
54#define ST21NFCA_EVT_CARD_DEACTIVATED 0x12
55#define ST21NFCA_EVT_CARD_ACTIVATED 0x13
56#define ST21NFCA_EVT_FIELD_OFF 0x14
57
58#define ST21NFCA_EVT_CARD_F_BITRATE 0x16
59#define ST21NFCA_EVT_READER_F_BITRATE 0x13
60#define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38)
61#define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07)
62#define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4)
63#define ST21NFCA_CARD_BITRATE_212 0x01
64#define ST21NFCA_CARD_BITRATE_424 0x02
65
66#define ST21NFCA_DEFAULT_TIMEOUT 0x0a
67
68
69#define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \
70 __LINE__, req)
71
72struct st21nfca_atr_req {
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 ppi;
81 u8 gbi[0];
82} __packed;
83
84struct st21nfca_atr_res {
85 u8 length;
86 u8 cmd0;
87 u8 cmd1;
88 u8 nfcid3[NFC_NFCID3_MAXSIZE];
89 u8 did;
90 u8 bsi;
91 u8 bri;
92 u8 to;
93 u8 ppi;
94 u8 gbi[0];
95} __packed;
96
97struct st21nfca_psl_req {
98 u8 length;
99 u8 cmd0;
100 u8 cmd1;
101 u8 did;
102 u8 brs;
103 u8 fsl;
104} __packed;
105
106struct st21nfca_psl_res {
107 u8 length;
108 u8 cmd0;
109 u8 cmd1;
110 u8 did;
111} __packed;
112
113struct st21nfca_dep_req_res {
114 u8 length;
115 u8 cmd0;
116 u8 cmd1;
117 u8 pfb;
118 u8 did;
119 u8 nad;
120} __packed;
121
122static void st21nfca_tx_work(struct work_struct *work)
123{
124 struct st21nfca_hci_info *info = container_of(work,
125 struct st21nfca_hci_info,
126 dep_info.tx_work);
127
128 struct nfc_dev *dev;
129 struct sk_buff *skb;
130
131 if (info) {
132 dev = info->hdev->ndev;
133 skb = info->dep_info.tx_pending;
134
135 device_lock(&dev->dev);
136
137 nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE,
138 ST21NFCA_WR_XCHG_DATA, skb->data, skb->len,
139 info->async_cb, info);
140 device_unlock(&dev->dev);
141 kfree_skb(skb);
142 }
143}
144
145static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info,
146 struct sk_buff *skb)
147{
148 info->dep_info.tx_pending = skb;
149 schedule_work(&info->dep_info.tx_work);
150}
151
152static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev,
153 struct st21nfca_atr_req *atr_req)
154{
155 struct st21nfca_atr_res *atr_res;
156 struct sk_buff *skb;
157 size_t gb_len;
158 int r;
159 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
160
161 gb_len = atr_req->length - sizeof(struct st21nfca_atr_req);
162 skb = alloc_skb(atr_req->length + 1, GFP_KERNEL);
163 if (!skb)
164 return -ENOMEM;
165
166 skb_put(skb, sizeof(struct st21nfca_atr_res));
167
168 atr_res = (struct st21nfca_atr_res *)skb->data;
169 memset(atr_res, 0, sizeof(struct st21nfca_atr_res));
170
171 atr_res->length = atr_req->length + 1;
172 atr_res->cmd0 = ST21NFCA_NFCIP1_RES;
173 atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES;
174
175 memcpy(atr_res->nfcid3, atr_req->nfcid3, 6);
176 atr_res->bsi = 0x00;
177 atr_res->bri = 0x00;
178 atr_res->to = ST21NFCA_DEFAULT_TIMEOUT;
179 atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
180
181 if (gb_len) {
182 skb_put(skb, gb_len);
183
184 atr_res->ppi |= ST21NFCA_GB_BIT;
185 memcpy(atr_res->gbi, atr_req->gbi, gb_len);
186 r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi,
187 gb_len);
188 if (r < 0)
189 return r;
190 }
191
192 info->dep_info.curr_nfc_dep_pni = 0;
193
194 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
195 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
196 kfree_skb(skb);
197 return r;
198}
199
200static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev,
201 struct sk_buff *skb)
202{
203 struct st21nfca_atr_req *atr_req;
204 size_t gb_len;
205 int r;
206
207 skb_trim(skb, skb->len - 1);
208
209 if (!skb->len) {
210 r = -EIO;
211 goto exit;
212 }
213
214 if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) {
215 r = -EPROTO;
216 goto exit;
217 }
218
219 atr_req = (struct st21nfca_atr_req *)skb->data;
220
221 if (atr_req->length < sizeof(struct st21nfca_atr_req)) {
222 r = -EPROTO;
223 goto exit;
224 }
225
226 r = st21nfca_tm_send_atr_res(hdev, atr_req);
227 if (r)
228 goto exit;
229
230 gb_len = skb->len - sizeof(struct st21nfca_atr_req);
231
232 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
233 NFC_COMM_PASSIVE, atr_req->gbi, gb_len);
234 if (r)
235 goto exit;
236
237 r = 0;
238
239exit:
240 return r;
241}
242
243static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev,
244 struct st21nfca_psl_req *psl_req)
245{
246 struct st21nfca_psl_res *psl_res;
247 struct sk_buff *skb;
248 u8 bitrate[2] = {0, 0};
249 int r;
250
251 skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL);
252 if (!skb)
253 return -ENOMEM;
254 skb_put(skb, sizeof(struct st21nfca_psl_res));
255
256 psl_res = (struct st21nfca_psl_res *)skb->data;
257
258 psl_res->length = sizeof(struct st21nfca_psl_res);
259 psl_res->cmd0 = ST21NFCA_NFCIP1_RES;
260 psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES;
261 psl_res->did = psl_req->did;
262
263 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
264 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
265 if (r < 0)
266 goto error;
267
268 /*
269 * ST21NFCA only support P2P passive.
270 * PSL_REQ BRS value != 0 has only a meaning to
271 * change technology to type F.
272 * We change to BITRATE 424Kbits.
273 * In other case switch to BITRATE 106Kbits.
274 */
275 if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) &&
276 ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) {
277 bitrate[0] = ST21NFCA_CARD_BITRATE_424;
278 bitrate[1] = ST21NFCA_CARD_BITRATE_424;
279 }
280
281 /* Send an event to change bitrate change event to card f */
282 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
283 ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2);
284error:
285 kfree_skb(skb);
286 return r;
287}
288
289static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev,
290 struct sk_buff *skb)
291{
292 struct st21nfca_psl_req *psl_req;
293 int r;
294
295 skb_trim(skb, skb->len - 1);
296
297 if (!skb->len) {
298 r = -EIO;
299 goto exit;
300 }
301
302 psl_req = (struct st21nfca_psl_req *)skb->data;
303
304 if (skb->len < sizeof(struct st21nfca_psl_req)) {
305 r = -EIO;
306 goto exit;
307 }
308
309 r = st21nfca_tm_send_psl_res(hdev, psl_req);
310exit:
311 return r;
312}
313
314int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb)
315{
316 int r;
317 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
318
319 *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
320 *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES;
321 *skb_push(skb, 1) = ST21NFCA_NFCIP1_RES;
322 *skb_push(skb, 1) = skb->len;
323
324 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
325 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
326 kfree_skb(skb);
327
328 return r;
329}
330EXPORT_SYMBOL(st21nfca_tm_send_dep_res);
331
332static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev,
333 struct sk_buff *skb)
334{
335 struct st21nfca_dep_req_res *dep_req;
336 u8 size;
337 int r;
338 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
339
340 skb_trim(skb, skb->len - 1);
341
342 size = 4;
343
344 dep_req = (struct st21nfca_dep_req_res *)skb->data;
345 if (skb->len < size) {
346 r = -EIO;
347 goto exit;
348 }
349
350 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb))
351 size++;
352 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb))
353 size++;
354
355 if (skb->len < size) {
356 r = -EIO;
357 goto exit;
358 }
359
360 /* Receiving DEP_REQ - Decoding */
361 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) {
362 case ST21NFCA_NFC_DEP_PFB_I_PDU:
363 info->dep_info.curr_nfc_dep_pni =
364 ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb);
365 break;
366 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
367 pr_err("Received a ACK/NACK PDU\n");
368 break;
369 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
370 pr_err("Received a SUPERVISOR PDU\n");
371 break;
372 }
373
374 skb_pull(skb, size);
375
376 return nfc_tm_data_received(hdev->ndev, skb);
377exit:
378 return r;
379}
380
381static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev,
382 struct sk_buff *skb)
383{
384 u8 cmd0, cmd1;
385 int r;
386
387 cmd0 = skb->data[1];
388 switch (cmd0) {
389 case ST21NFCA_NFCIP1_REQ:
390 cmd1 = skb->data[2];
391 switch (cmd1) {
392 case ST21NFCA_NFCIP1_ATR_REQ:
393 r = st21nfca_tm_recv_atr_req(hdev, skb);
394 break;
395 case ST21NFCA_NFCIP1_PSL_REQ:
396 r = st21nfca_tm_recv_psl_req(hdev, skb);
397 break;
398 case ST21NFCA_NFCIP1_DEP_REQ:
399 r = st21nfca_tm_recv_dep_req(hdev, skb);
400 break;
401 default:
402 return 1;
403 }
404 default:
405 return 1;
406 }
407 return r;
408}
409
410/*
411 * Returns:
412 * <= 0: driver handled the event, skb consumed
413 * 1: driver does not handle the event, please do standard processing
414 */
415int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
416 u8 event, struct sk_buff *skb)
417{
418 int r = 0;
419 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
420
421 pr_debug("dep event: %d\n", event);
422
423 switch (event) {
424 case ST21NFCA_EVT_CARD_ACTIVATED:
425 info->dep_info.curr_nfc_dep_pni = 0;
426 break;
427 case ST21NFCA_EVT_CARD_DEACTIVATED:
428 break;
429 case ST21NFCA_EVT_FIELD_ON:
430 break;
431 case ST21NFCA_EVT_FIELD_OFF:
432 break;
433 case ST21NFCA_EVT_SEND_DATA:
434 r = st21nfca_tm_event_send_data(hdev, skb);
435 if (r < 0)
436 return r;
437 return 0;
438 default:
439 return 1;
440 }
441 kfree_skb(skb);
442 return r;
443}
444EXPORT_SYMBOL(st21nfca_dep_event_received);
445
446static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi,
447 u8 bri, u8 lri)
448{
449 struct sk_buff *skb;
450 struct st21nfca_psl_req *psl_req;
451 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
452
453 skb =
454 alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL);
455 if (!skb)
456 return;
457 skb_reserve(skb, 1);
458
459 skb_put(skb, sizeof(struct st21nfca_psl_req));
460 psl_req = (struct st21nfca_psl_req *) skb->data;
461
462 psl_req->length = sizeof(struct st21nfca_psl_req);
463 psl_req->cmd0 = ST21NFCA_NFCIP1_REQ;
464 psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ;
465 psl_req->did = did;
466 psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03);
467 psl_req->fsl = lri;
468
469 *skb_push(skb, 1) = info->dep_info.to | 0x10;
470
471 st21nfca_im_send_pdu(info, skb);
472}
473
474#define ST21NFCA_CB_TYPE_READER_F 1
475static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb,
476 int err)
477{
478 struct st21nfca_hci_info *info = context;
479 struct st21nfca_atr_res *atr_res;
480 int r;
481
482 if (err != 0)
483 return;
484
485 if (!skb)
486 return;
487
488 switch (info->async_cb_type) {
489 case ST21NFCA_CB_TYPE_READER_F:
490 skb_trim(skb, skb->len - 1);
491 atr_res = (struct st21nfca_atr_res *)skb->data;
492 r = nfc_set_remote_general_bytes(info->hdev->ndev,
493 atr_res->gbi,
494 skb->len - sizeof(struct st21nfca_atr_res));
495 if (r < 0)
496 return;
497
498 if (atr_res->to >= 0x0e)
499 info->dep_info.to = 0x0e;
500 else
501 info->dep_info.to = atr_res->to + 1;
502
503 info->dep_info.to |= 0x10;
504
505 r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx,
506 NFC_COMM_PASSIVE, NFC_RF_INITIATOR);
507 if (r < 0)
508 return;
509
510 info->dep_info.curr_nfc_dep_pni = 0;
511 if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri)
512 st21nfca_im_send_psl_req(info->hdev, atr_res->did,
513 atr_res->bsi, atr_res->bri,
514 ST21NFCA_PP2LRI(atr_res->ppi));
515 break;
516 default:
517 kfree_skb(skb);
518 break;
519 }
520}
521
522int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len)
523{
524 struct sk_buff *skb;
525 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
526 struct st21nfca_atr_req *atr_req;
527 struct nfc_target *target;
528 uint size;
529
530 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
531 size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len;
532 if (size > ST21NFCA_ATR_REQ_MAX_SIZE) {
533 PROTOCOL_ERR("14.6.1.1");
534 return -EINVAL;
535 }
536
537 skb =
538 alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL);
539 if (!skb)
540 return -ENOMEM;
541
542 skb_reserve(skb, 1);
543
544 skb_put(skb, sizeof(struct st21nfca_atr_req));
545
546 atr_req = (struct st21nfca_atr_req *)skb->data;
547 memset(atr_req, 0, sizeof(struct st21nfca_atr_req));
548
549 atr_req->cmd0 = ST21NFCA_NFCIP1_REQ;
550 atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ;
551 memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE);
552 target = hdev->ndev->targets;
553
554 if (target->sensf_res_len > 0)
555 memcpy(atr_req->nfcid3, target->sensf_res,
556 target->sensf_res_len);
557 else
558 get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE);
559
560 atr_req->did = 0x0;
561
562 atr_req->bsi = 0x00;
563 atr_req->bri = 0x00;
564 atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
565 if (gb_len) {
566 atr_req->ppi |= ST21NFCA_GB_BIT;
567 memcpy(skb_put(skb, gb_len), gb, gb_len);
568 }
569 atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len;
570
571 *skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */
572
573 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
574 info->async_cb_context = info;
575 info->async_cb = st21nfca_im_recv_atr_res_cb;
576 info->dep_info.bri = atr_req->bri;
577 info->dep_info.bsi = atr_req->bsi;
578 info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi);
579
580 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
581 ST21NFCA_WR_XCHG_DATA, skb->data,
582 skb->len, info->async_cb, info);
583}
584EXPORT_SYMBOL(st21nfca_im_send_atr_req);
585
586static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
587 int err)
588{
589 struct st21nfca_hci_info *info = context;
590 struct st21nfca_dep_req_res *dep_res;
591
592 int size;
593
594 if (err != 0)
595 return;
596
597 if (!skb)
598 return;
599
600 switch (info->async_cb_type) {
601 case ST21NFCA_CB_TYPE_READER_F:
602 dep_res = (struct st21nfca_dep_req_res *)skb->data;
603
604 size = 3;
605 if (skb->len < size)
606 goto exit;
607
608 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb))
609 size++;
610 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb))
611 size++;
612
613 if (skb->len < size)
614 goto exit;
615
616 skb_trim(skb, skb->len - 1);
617
618 /* Receiving DEP_REQ - Decoding */
619 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) {
620 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
621 pr_err("Received a ACK/NACK PDU\n");
622 case ST21NFCA_NFC_DEP_PFB_I_PDU:
623 info->dep_info.curr_nfc_dep_pni =
624 ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1);
625 size++;
626 skb_pull(skb, size);
627 nfc_tm_data_received(info->hdev->ndev, skb);
628 break;
629 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
630 pr_err("Received a SUPERVISOR PDU\n");
631 skb_pull(skb, size);
632 *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
633 *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
634 *skb_push(skb, 1) = skb->len;
635 *skb_push(skb, 1) = info->dep_info.to | 0x10;
636
637 st21nfca_im_send_pdu(info, skb);
638 break;
639 }
640
641 return;
642 default:
643 break;
644 }
645
646exit:
647 kfree_skb(skb);
648}
649
650int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb)
651{
652 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
653
654 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
655 info->async_cb_context = info;
656 info->async_cb = st21nfca_im_recv_dep_res_cb;
657
658 *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
659 *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
660 *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
661 *skb_push(skb, 1) = skb->len;
662
663 *skb_push(skb, 1) = info->dep_info.to | 0x10;
664
665 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
666 ST21NFCA_WR_XCHG_DATA,
667 skb->data, skb->len,
668 info->async_cb, info);
669}
670EXPORT_SYMBOL(st21nfca_im_send_dep_req);
671
672void st21nfca_dep_init(struct nfc_hci_dev *hdev)
673{
674 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
675
676 INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work);
677 info->dep_info.curr_nfc_dep_pni = 0;
678 info->dep_info.idx = 0;
679 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
680}
681EXPORT_SYMBOL(st21nfca_dep_init);
682
683void st21nfca_dep_deinit(struct nfc_hci_dev *hdev)
684{
685 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
686
687 cancel_work_sync(&info->dep_info.tx_work);
688}
689EXPORT_SYMBOL(st21nfca_dep_deinit);