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Merge remote-tracking branch 'regulator/fix/twl' into tmp
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / nfc / hci / core.c
CommitLineData
8b8d2e08
EL		 1/*
2 * Copyright (C) 2012 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20#define pr_fmt(fmt) "hci: %s: " fmt, __func__
21
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/nfc.h>
26
27#include <net/nfc/nfc.h>
28#include <net/nfc/hci.h>
67cccfe1 29#include <net/nfc/llc.h>
8b8d2e08
EL		 30
31#include "hci.h"
32
33/* Largest headroom needed for outgoing HCI commands */
34#define HCI_CMDS_HEADROOM 1
35
84d48190 36int nfc_hci_result_to_errno(u8 result)
6c1c5b9e
EL		 37{
38 switch (result) {
39 case NFC_HCI_ANY_OK:
40 return 0;
23f7e6d0
EL		 41 case NFC_HCI_ANY_E_REG_PAR_UNKNOWN:
42 return -EOPNOTSUPP;
6c1c5b9e
EL		 43 case NFC_HCI_ANY_E_TIMEOUT:
44 return -ETIME;
45 default:
46 return -1;
47 }
48}
84d48190 49EXPORT_SYMBOL(nfc_hci_result_to_errno);
6c1c5b9e 50
8b8d2e08
EL		 51static void nfc_hci_msg_tx_work(struct work_struct *work)
52{
53 struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
54 msg_tx_work);
55 struct hci_msg *msg;
56 struct sk_buff *skb;
57 int r = 0;
58
59 mutex_lock(&hdev->msg_tx_mutex);
f0c91038
EL		 60 if (hdev->shutting_down)
61 goto exit;
8b8d2e08
EL		 62
63 if (hdev->cmd_pending_msg) {
64 if (timer_pending(&hdev->cmd_timer) == 0) {
65 if (hdev->cmd_pending_msg->cb)
b5faa648 66 hdev->cmd_pending_msg->cb(hdev->
8b8d2e08 67 cmd_pending_msg->
b5faa648
EL		 68 cb_context,
69 NULL,
70 -ETIME);
8b8d2e08
EL		 71 kfree(hdev->cmd_pending_msg);
72 hdev->cmd_pending_msg = NULL;
0f450772 73 } else {
8b8d2e08 74 goto exit;
0f450772 75 }
8b8d2e08
EL		 76 }
77
78next_msg:
79 if (list_empty(&hdev->msg_tx_queue))
80 goto exit;
81
82 msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg, msg_l);
83 list_del(&msg->msg_l);
84
85 pr_debug("msg_tx_queue has a cmd to send\n");
86 while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) {
412fda53 87 r = nfc_llc_xmit_from_hci(hdev->llc, skb);
8b8d2e08
EL		 88 if (r < 0) {
89 kfree_skb(skb);
90 skb_queue_purge(&msg->msg_frags);
91 if (msg->cb)
b5faa648 92 msg->cb(msg->cb_context, NULL, r);
8b8d2e08
EL		 93 kfree(msg);
94 break;
95 }
96 }
97
98 if (r)
99 goto next_msg;
100
101 if (msg->wait_response == false) {
102 kfree(msg);
103 goto next_msg;
104 }
105
106 hdev->cmd_pending_msg = msg;
107 mod_timer(&hdev->cmd_timer, jiffies +
108 msecs_to_jiffies(hdev->cmd_pending_msg->completion_delay));
109
110exit:
111 mutex_unlock(&hdev->msg_tx_mutex);
112}
113
114static void nfc_hci_msg_rx_work(struct work_struct *work)
115{
116 struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
117 msg_rx_work);
118 struct sk_buff *skb;
119 struct hcp_message *message;
120 u8 pipe;
121 u8 type;
122 u8 instruction;
123
124 while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
125 pipe = skb->data[0];
126 skb_pull(skb, NFC_HCI_HCP_PACKET_HEADER_LEN);
127 message = (struct hcp_message *)skb->data;
128 type = HCP_MSG_GET_TYPE(message->header);
129 instruction = HCP_MSG_GET_CMD(message->header);
130 skb_pull(skb, NFC_HCI_HCP_MESSAGE_HEADER_LEN);
131
132 nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, skb);
133 }
134}
135
ccca0d6e
EL		 136static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err,
137 struct sk_buff *skb)
8b8d2e08 138{
8b8d2e08
EL		 139 del_timer_sync(&hdev->cmd_timer);
140
141 if (hdev->cmd_pending_msg->cb)
b5faa648
EL		 142 hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context,
143 skb, err);
8b8d2e08
EL		 144 else
145 kfree_skb(skb);
146
147 kfree(hdev->cmd_pending_msg);
148 hdev->cmd_pending_msg = NULL;
149
916082b0 150 schedule_work(&hdev->msg_tx_work);
ccca0d6e
EL		 151}
152
153void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
154 struct sk_buff *skb)
155{
156 mutex_lock(&hdev->msg_tx_mutex);
157
158 if (hdev->cmd_pending_msg == NULL) {
159 kfree_skb(skb);
160 goto exit;
161 }
162
163 __nfc_hci_cmd_completion(hdev, nfc_hci_result_to_errno(result), skb);
8b8d2e08
EL		 164
165exit:
166 mutex_unlock(&hdev->msg_tx_mutex);
167}
168
169void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
170 struct sk_buff *skb)
171{
172 kfree_skb(skb);
173}
174
9c5121a0 175u32 nfc_hci_sak_to_protocol(u8 sak)
8b8d2e08
EL		 176{
177 switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) {
178 case NFC_HCI_TYPE_A_SEL_PROT_MIFARE:
179 return NFC_PROTO_MIFARE_MASK;
180 case NFC_HCI_TYPE_A_SEL_PROT_ISO14443:
181 return NFC_PROTO_ISO14443_MASK;
182 case NFC_HCI_TYPE_A_SEL_PROT_DEP:
183 return NFC_PROTO_NFC_DEP_MASK;
184 case NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP:
185 return NFC_PROTO_ISO14443_MASK | NFC_PROTO_NFC_DEP_MASK;
186 default:
187 return 0xffffffff;
188 }
189}
9c5121a0 190EXPORT_SYMBOL(nfc_hci_sak_to_protocol);
8b8d2e08 191
f7a5f6c5 192int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
8b8d2e08
EL		 193{
194 struct nfc_target *targets;
195 struct sk_buff *atqa_skb = NULL;
196 struct sk_buff *sak_skb = NULL;
81b30395 197 struct sk_buff *uid_skb = NULL;
8b8d2e08
EL		 198 int r;
199
200 pr_debug("from gate %d\n", gate);
201
202 targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
203 if (targets == NULL)
204 return -ENOMEM;
205
206 switch (gate) {
207 case NFC_HCI_RF_READER_A_GATE:
208 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
209 NFC_HCI_RF_READER_A_ATQA, &atqa_skb);
210 if (r < 0)
211 goto exit;
212
213 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
214 NFC_HCI_RF_READER_A_SAK, &sak_skb);
215 if (r < 0)
216 goto exit;
217
218 if (atqa_skb->len != 2 || sak_skb->len != 1) {
219 r = -EPROTO;
220 goto exit;
221 }
222
223 targets->supported_protocols =
224 nfc_hci_sak_to_protocol(sak_skb->data[0]);
225 if (targets->supported_protocols == 0xffffffff) {
226 r = -EPROTO;
227 goto exit;
228 }
229
230 targets->sens_res = be16_to_cpu(*(u16 *)atqa_skb->data);
231 targets->sel_res = sak_skb->data[0];
232
81b30395
EL		 233 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
234 NFC_HCI_RF_READER_A_UID, &uid_skb);
235 if (r < 0)
236 goto exit;
237
238 if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) {
239 r = -EPROTO;
240 goto exit;
241 }
242
243 memcpy(targets->nfcid1, uid_skb->data, uid_skb->len);
244 targets->nfcid1_len = uid_skb->len;
245
8b8d2e08
EL		 246 if (hdev->ops->complete_target_discovered) {
247 r = hdev->ops->complete_target_discovered(hdev, gate,
248 targets);
249 if (r < 0)
250 goto exit;
251 }
252 break;
253 case NFC_HCI_RF_READER_B_GATE:
01d719a2 254 targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
8b8d2e08
EL		 255 break;
256 default:
257 if (hdev->ops->target_from_gate)
258 r = hdev->ops->target_from_gate(hdev, gate, targets);
259 else
260 r = -EPROTO;
261 if (r < 0)
262 goto exit;
263
264 if (hdev->ops->complete_target_discovered) {
265 r = hdev->ops->complete_target_discovered(hdev, gate,
266 targets);
267 if (r < 0)
268 goto exit;
269 }
270 break;
271 }
272
928326f2
AW		 273 /* if driver set the new gate, we will skip the old one */
274 if (targets->hci_reader_gate == 0x00)
275 targets->hci_reader_gate = gate;
8b8d2e08
EL		 276
277 r = nfc_targets_found(hdev->ndev, targets, 1);
8b8d2e08
EL		 278
279exit:
280 kfree(targets);
281 kfree_skb(atqa_skb);
282 kfree_skb(sak_skb);
81b30395 283 kfree_skb(uid_skb);
8b8d2e08
EL		 284
285 return r;
286}
f7a5f6c5 287EXPORT_SYMBOL(nfc_hci_target_discovered);
8b8d2e08
EL		 288
289void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
290 struct sk_buff *skb)
291{
292 int r = 0;
74a5b966
EL		 293 u8 gate = nfc_hci_pipe2gate(hdev, pipe);
294
295 if (gate == 0xff) {
296 pr_err("Discarded event %x to unopened pipe %x\n", event, pipe);
297 goto exit;
298 }
8b8d2e08 299
40d06d36
EL		 300 if (hdev->ops->event_received) {
301 r = hdev->ops->event_received(hdev, gate, event, skb);
302 if (r <= 0)
303 goto exit_noskb;
304 }
305
8b8d2e08
EL		 306 switch (event) {
307 case NFC_HCI_EVT_TARGET_DISCOVERED:
8b8d2e08
EL		 308 if (skb->len < 1) { /* no status data? */
309 r = -EPROTO;
310 goto exit;
311 }
312
313 if (skb->data[0] == 3) {
314 /* TODO: Multiple targets in field, none activated
315 * poll is supposedly stopped, but there is no
316 * single target to activate, so nothing to report
317 * up.
318 * if we need to restart poll, we must save the
319 * protocols from the initial poll and reuse here.
320 */
321 }
322
323 if (skb->data[0] != 0) {
324 r = -EPROTO;
325 goto exit;
326 }
327
74a5b966 328 r = nfc_hci_target_discovered(hdev, gate);
8b8d2e08
EL		 329 break;
330 default:
40d06d36
EL		 331 pr_info("Discarded unknown event %x to gate %x\n", event, gate);
332 r = -EINVAL;
8b8d2e08
EL		 333 break;
334 }
335
336exit:
337 kfree_skb(skb);
338
27c31191 339exit_noskb:
8b8d2e08
EL		 340 if (r) {
341 /* TODO: There was an error dispatching the event,
342 * how to propagate up to nfc core?
343 */
344 }
345}
346
347static void nfc_hci_cmd_timeout(unsigned long data)
348{
349 struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
350
916082b0 351 schedule_work(&hdev->msg_tx_work);
8b8d2e08
EL		 352}
353
354static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
a10d595b 355 struct nfc_hci_gate *gates)
8b8d2e08
EL		 356{
357 int r;
8b8d2e08 358 while (gate_count--) {
a10d595b
EL		 359 r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
360 gates->gate, gates->pipe);
8b8d2e08
EL		 361 if (r < 0)
362 return r;
a10d595b 363 gates++;
8b8d2e08
EL		 364 }
365
366 return 0;
367}
368
369static int hci_dev_session_init(struct nfc_hci_dev *hdev)
370{
371 struct sk_buff *skb = NULL;
372 int r;
a10d595b
EL		 373
374 if (hdev->init_data.gates[0].gate != NFC_HCI_ADMIN_GATE)
375 return -EPROTO;
8b8d2e08
EL		 376
377 r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
a10d595b
EL		 378 hdev->init_data.gates[0].gate,
379 hdev->init_data.gates[0].pipe);
8b8d2e08
EL		 380 if (r < 0)
381 goto exit;
382
383 r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE,
384 NFC_HCI_ADMIN_SESSION_IDENTITY, &skb);
385 if (r < 0)
386 goto disconnect_all;
387
388 if (skb->len && skb->len == strlen(hdev->init_data.session_id))
389 if (memcmp(hdev->init_data.session_id, skb->data,
390 skb->len) == 0) {
391 /* TODO ELa: restore gate<->pipe table from
392 * some TBD location.
393 * note: it doesn't seem possible to get the chip
394 * currently open gate/pipe table.
395 * It is only possible to obtain the supported
396 * gate list.
397 */
398
399 /* goto exit
400 * For now, always do a full initialization */
401 }
402
403 r = nfc_hci_disconnect_all_gates(hdev);
404 if (r < 0)
405 goto exit;
406
8b8d2e08
EL		 407 r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count,
408 hdev->init_data.gates);
409 if (r < 0)
410 goto disconnect_all;
411
412 r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
413 NFC_HCI_ADMIN_SESSION_IDENTITY,
414 hdev->init_data.session_id,
415 strlen(hdev->init_data.session_id));
416 if (r == 0)
417 goto exit;
418
419disconnect_all:
420 nfc_hci_disconnect_all_gates(hdev);
421
422exit:
33e59713 423 kfree_skb(skb);
8b8d2e08
EL		 424
425 return r;
426}
427
428static int hci_dev_version(struct nfc_hci_dev *hdev)
429{
430 int r;
431 struct sk_buff *skb;
432
433 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
434 NFC_HCI_ID_MGMT_VERSION_SW, &skb);
23f7e6d0
EL		 435 if (r == -EOPNOTSUPP) {
436 pr_info("Software/Hardware info not available\n");
437 return 0;
438 }
8b8d2e08
EL		 439 if (r < 0)
440 return r;
441
442 if (skb->len != 3) {
443 kfree_skb(skb);
444 return -EINVAL;
445 }
446
447 hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4;
448 hdev->sw_patch = skb->data[0] & 0x0f;
449 hdev->sw_flashlib_major = skb->data[1];
450 hdev->sw_flashlib_minor = skb->data[2];
451
452 kfree_skb(skb);
453
454 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
455 NFC_HCI_ID_MGMT_VERSION_HW, &skb);
456 if (r < 0)
457 return r;
458
459 if (skb->len != 3) {
460 kfree_skb(skb);
461 return -EINVAL;
462 }
463
464 hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5;
465 hdev->hw_version = skb->data[0] & 0x1f;
466 hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6;
467 hdev->hw_software = skb->data[1] & 0x3f;
468 hdev->hw_bsid = skb->data[2];
469
470 kfree_skb(skb);
471
472 pr_info("SOFTWARE INFO:\n");
473 pr_info("RomLib : %d\n", hdev->sw_romlib);
474 pr_info("Patch : %d\n", hdev->sw_patch);
475 pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major);
476 pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor);
477 pr_info("HARDWARE INFO:\n");
478 pr_info("Derivative : %d\n", hdev->hw_derivative);
479 pr_info("HW Version : %d\n", hdev->hw_version);
480 pr_info("#MPW : %d\n", hdev->hw_mpw);
481 pr_info("Software : %d\n", hdev->hw_software);
482 pr_info("BSID Version : %d\n", hdev->hw_bsid);
483
484 return 0;
485}
486
487static int hci_dev_up(struct nfc_dev *nfc_dev)
488{
489 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
490 int r = 0;
491
492 if (hdev->ops->open) {
493 r = hdev->ops->open(hdev);
494 if (r < 0)
495 return r;
496 }
497
412fda53
EL		 498 r = nfc_llc_start(hdev->llc);
499 if (r < 0)
500 goto exit_close;
501
8b8d2e08
EL		 502 r = hci_dev_session_init(hdev);
503 if (r < 0)
412fda53 504 goto exit_llc;
8b8d2e08
EL		 505
506 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
507 NFC_HCI_EVT_END_OPERATION, NULL, 0);
508 if (r < 0)
412fda53 509 goto exit_llc;
8b8d2e08
EL		 510
511 if (hdev->ops->hci_ready) {
512 r = hdev->ops->hci_ready(hdev);
513 if (r < 0)
412fda53 514 goto exit_llc;
8b8d2e08
EL		 515 }
516
517 r = hci_dev_version(hdev);
518 if (r < 0)
412fda53
EL		 519 goto exit_llc;
520
521 return 0;
522
523exit_llc:
524 nfc_llc_stop(hdev->llc);
525
526exit_close:
527 if (hdev->ops->close)
528 hdev->ops->close(hdev);
8b8d2e08 529
8b8d2e08
EL		 530 return r;
531}
532
533static int hci_dev_down(struct nfc_dev *nfc_dev)
534{
535 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
536
412fda53
EL		 537 nfc_llc_stop(hdev->llc);
538
8b8d2e08
EL		 539 if (hdev->ops->close)
540 hdev->ops->close(hdev);
541
542 memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
543
544 return 0;
545}
546
fe7c5800
SO		 547static int hci_start_poll(struct nfc_dev *nfc_dev,
548 u32 im_protocols, u32 tm_protocols)
8b8d2e08
EL		 549{
550 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
8b8d2e08
EL		 551
552 if (hdev->ops->start_poll)
fe7c5800 553 return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
8b8d2e08 554 else
03bed29e 555 return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
0f450772
SJ		 556 NFC_HCI_EVT_READER_REQUESTED,
557 NULL, 0);
8b8d2e08
EL		 558}
559
560static void hci_stop_poll(struct nfc_dev *nfc_dev)
561{
562 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
563
03bed29e
EL		 564 nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
565 NFC_HCI_EVT_END_OPERATION, NULL, 0);
8b8d2e08
EL		 566}
567
c40d1740
AW		 568static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
569 __u8 comm_mode, __u8 *gb, size_t gb_len)
570{
571 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
572
573 if (hdev->ops->dep_link_up)
574 return hdev->ops->dep_link_up(hdev, target, comm_mode,
575 gb, gb_len);
576
577 return 0;
578}
579
580static int hci_dep_link_down(struct nfc_dev *nfc_dev)
581{
582 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
583
584 if (hdev->ops->dep_link_down)
585 return hdev->ops->dep_link_down(hdev);
586
587 return 0;
588}
589
90099433
EL		 590static int hci_activate_target(struct nfc_dev *nfc_dev,
591 struct nfc_target *target, u32 protocol)
8b8d2e08 592{
8b8d2e08
EL		 593 return 0;
594}
595
90099433
EL		 596static void hci_deactivate_target(struct nfc_dev *nfc_dev,
597 struct nfc_target *target)
8b8d2e08
EL		 598{
599}
600
f3e8fb55
EL		 601#define HCI_CB_TYPE_TRANSCEIVE 1
602
603static void hci_transceive_cb(void *context, struct sk_buff *skb, int err)
604{
605 struct nfc_hci_dev *hdev = context;
606
607 switch (hdev->async_cb_type) {
608 case HCI_CB_TYPE_TRANSCEIVE:
609 /*
610 * TODO: Check RF Error indicator to make sure data is valid.
611 * It seems that HCI cmd can complete without error, but data
612 * can be invalid if an RF error occured? Ignore for now.
613 */
614 if (err == 0)
615 skb_trim(skb, skb->len - 1); /* RF Err ind */
616
617 hdev->async_cb(hdev->async_cb_context, skb, err);
618 break;
619 default:
620 if (err == 0)
621 kfree_skb(skb);
622 break;
623 }
624}
625
be9ae4ce
SO		 626static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
627 struct sk_buff *skb, data_exchange_cb_t cb,
628 void *cb_context)
8b8d2e08
EL		 629{
630 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
631 int r;
8b8d2e08 632
90099433 633 pr_debug("target_idx=%d\n", target->idx);
8b8d2e08
EL		 634
635 switch (target->hci_reader_gate) {
636 case NFC_HCI_RF_READER_A_GATE:
637 case NFC_HCI_RF_READER_B_GATE:
e8107623
AW		 638 if (hdev->ops->im_transceive) {
639 r = hdev->ops->im_transceive(hdev, target, skb, cb,
f3e8fb55 640 cb_context);
8b8d2e08
EL		 641 if (r <= 0) /* handled */
642 break;
643 }
644
645 *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */
f3e8fb55
EL		 646
647 hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE;
648 hdev->async_cb = cb;
649 hdev->async_cb_context = cb_context;
650
651 r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
652 NFC_HCI_WR_XCHG_DATA, skb->data,
653 skb->len, hci_transceive_cb, hdev);
8b8d2e08
EL		 654 break;
655 default:
e8107623
AW		 656 if (hdev->ops->im_transceive) {
657 r = hdev->ops->im_transceive(hdev, target, skb, cb,
f3e8fb55 658 cb_context);
8b8d2e08
EL		 659 if (r == 1)
660 r = -ENOTSUPP;
0f450772 661 } else {
8b8d2e08 662 r = -ENOTSUPP;
0f450772 663 }
f3e8fb55 664 break;
8b8d2e08
EL		 665 }
666
667 kfree_skb(skb);
668
f3e8fb55 669 return r;
8b8d2e08
EL		 670}
671
984d334f 672static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
e8107623
AW		 673{
674 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
675
676 if (hdev->ops->tm_send)
677 return hdev->ops->tm_send(hdev, skb);
924d4a02
EL		 678
679 kfree_skb(skb);
680
681 return -ENOTSUPP;
e8107623
AW		 682}
683
1676f751
EL		 684static int hci_check_presence(struct nfc_dev *nfc_dev,
685 struct nfc_target *target)
686{
687 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
688
689 if (hdev->ops->check_presence)
690 return hdev->ops->check_presence(hdev, target);
691
692 return 0;
693}
694
412fda53
EL		 695static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err)
696{
697 mutex_lock(&hdev->msg_tx_mutex);
698
699 if (hdev->cmd_pending_msg == NULL) {
700 nfc_driver_failure(hdev->ndev, err);
701 goto exit;
702 }
703
704 __nfc_hci_cmd_completion(hdev, err, NULL);
705
706exit:
707 mutex_unlock(&hdev->msg_tx_mutex);
708}
709
710static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err)
711{
712 nfc_hci_failure(hdev, err);
713}
714
715static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
716{
717 struct hcp_packet *packet;
718 u8 type;
719 u8 instruction;
720 struct sk_buff *hcp_skb;
721 u8 pipe;
722 struct sk_buff *frag_skb;
723 int msg_len;
724
725 packet = (struct hcp_packet *)skb->data;
726 if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) {
727 skb_queue_tail(&hdev->rx_hcp_frags, skb);
728 return;
729 }
730
731 /* it's the last fragment. Does it need re-aggregation? */
732 if (skb_queue_len(&hdev->rx_hcp_frags)) {
733 pipe = packet->header & NFC_HCI_FRAGMENT;
734 skb_queue_tail(&hdev->rx_hcp_frags, skb);
735
736 msg_len = 0;
737 skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
738 msg_len += (frag_skb->len -
739 NFC_HCI_HCP_PACKET_HEADER_LEN);
740 }
741
742 hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN +
743 msg_len, GFP_KERNEL);
744 if (hcp_skb == NULL) {
745 nfc_hci_failure(hdev, -ENOMEM);
746 return;
747 }
748
749 *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
750
751 skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
752 msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
753 memcpy(skb_put(hcp_skb, msg_len),
754 frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN,
755 msg_len);
756 }
757
758 skb_queue_purge(&hdev->rx_hcp_frags);
759 } else {
760 packet->header &= NFC_HCI_FRAGMENT;
761 hcp_skb = skb;
762 }
763
764 /* if this is a response, dispatch immediately to
765 * unblock waiting cmd context. Otherwise, enqueue to dispatch
766 * in separate context where handler can also execute command.
767 */
768 packet = (struct hcp_packet *)hcp_skb->data;
769 type = HCP_MSG_GET_TYPE(packet->message.header);
770 if (type == NFC_HCI_HCP_RESPONSE) {
771 pipe = packet->header;
772 instruction = HCP_MSG_GET_CMD(packet->message.header);
773 skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN +
774 NFC_HCI_HCP_MESSAGE_HEADER_LEN);
775 nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
776 } else {
777 skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
916082b0 778 schedule_work(&hdev->msg_rx_work);
412fda53
EL		 779 }
780}
781
bd007bea 782static struct nfc_ops hci_nfc_ops = {
8b8d2e08
EL		 783 .dev_up = hci_dev_up,
784 .dev_down = hci_dev_down,
785 .start_poll = hci_start_poll,
786 .stop_poll = hci_stop_poll,
c40d1740
AW		 787 .dep_link_up = hci_dep_link_up,
788 .dep_link_down = hci_dep_link_down,
8b8d2e08
EL		 789 .activate_target = hci_activate_target,
790 .deactivate_target = hci_deactivate_target,
be9ae4ce 791 .im_transceive = hci_transceive,
e8107623 792 .tm_send = hci_tm_send,
1676f751 793 .check_presence = hci_check_presence,
8b8d2e08
EL		 794};
795
796struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
797 struct nfc_hci_init_data *init_data,
bf71ab8b 798 unsigned long quirks,
8b8d2e08 799 u32 protocols,
390a1bd8 800 u32 supported_se,
412fda53 801 const char *llc_name,
8b8d2e08
EL		 802 int tx_headroom,
803 int tx_tailroom,
804 int max_link_payload)
805{
806 struct nfc_hci_dev *hdev;
807
808 if (ops->xmit == NULL)
809 return NULL;
810
811 if (protocols == 0)
812 return NULL;
813
814 hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL);
815 if (hdev == NULL)
816 return NULL;
817
412fda53
EL		 818 hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit,
819 nfc_hci_recv_from_llc, tx_headroom,
820 tx_tailroom, nfc_hci_llc_failure);
821 if (hdev->llc == NULL) {
822 kfree(hdev);
823 return NULL;
824 }
825
390a1bd8 826 hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, supported_se,
8b8d2e08
EL		 827 tx_headroom + HCI_CMDS_HEADROOM,
828 tx_tailroom);
829 if (!hdev->ndev) {
412fda53 830 nfc_llc_free(hdev->llc);
8b8d2e08
EL		 831 kfree(hdev);
832 return NULL;
833 }
834
835 hdev->ops = ops;
836 hdev->max_data_link_payload = max_link_payload;
837 hdev->init_data = *init_data;
838
839 nfc_set_drvdata(hdev->ndev, hdev);
840
841 memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
842
bf71ab8b
EL		 843 hdev->quirks = quirks;
844
8b8d2e08
EL		 845 return hdev;
846}
847EXPORT_SYMBOL(nfc_hci_allocate_device);
848
849void nfc_hci_free_device(struct nfc_hci_dev *hdev)
850{
851 nfc_free_device(hdev->ndev);
412fda53 852 nfc_llc_free(hdev->llc);
8b8d2e08
EL		 853 kfree(hdev);
854}
855EXPORT_SYMBOL(nfc_hci_free_device);
856
857int nfc_hci_register_device(struct nfc_hci_dev *hdev)
858{
8b8d2e08
EL		 859 mutex_init(&hdev->msg_tx_mutex);
860
861 INIT_LIST_HEAD(&hdev->msg_tx_queue);
862
863 INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
8b8d2e08
EL		 864
865 init_timer(&hdev->cmd_timer);
866 hdev->cmd_timer.data = (unsigned long)hdev;
867 hdev->cmd_timer.function = nfc_hci_cmd_timeout;
868
869 skb_queue_head_init(&hdev->rx_hcp_frags);
870
871 INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
8b8d2e08
EL		 872
873 skb_queue_head_init(&hdev->msg_rx_queue);
874
474fee3d 875 return nfc_register_device(hdev->ndev);
8b8d2e08
EL		 876}
877EXPORT_SYMBOL(nfc_hci_register_device);
878
879void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
880{
1913e57c 881 struct hci_msg *msg, *n;
8b8d2e08 882
f0c91038
EL		 883 mutex_lock(&hdev->msg_tx_mutex);
884
885 if (hdev->cmd_pending_msg) {
886 if (hdev->cmd_pending_msg->cb)
887 hdev->cmd_pending_msg->cb(
888 hdev->cmd_pending_msg->cb_context,
889 NULL, -ESHUTDOWN);
890 kfree(hdev->cmd_pending_msg);
891 hdev->cmd_pending_msg = NULL;
892 }
893
894 hdev->shutting_down = true;
895
896 mutex_unlock(&hdev->msg_tx_mutex);
897
898 del_timer_sync(&hdev->cmd_timer);
899 cancel_work_sync(&hdev->msg_tx_work);
900
901 cancel_work_sync(&hdev->msg_rx_work);
902
903 nfc_unregister_device(hdev->ndev);
904
8b8d2e08
EL		 905 skb_queue_purge(&hdev->rx_hcp_frags);
906 skb_queue_purge(&hdev->msg_rx_queue);
907
1913e57c 908 list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) {
8b8d2e08
EL		 909 list_del(&msg->msg_l);
910 skb_queue_purge(&msg->msg_frags);
911 kfree(msg);
912 }
8b8d2e08
EL		 913}
914EXPORT_SYMBOL(nfc_hci_unregister_device);
915
916void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata)
917{
918 hdev->clientdata = clientdata;
919}
920EXPORT_SYMBOL(nfc_hci_set_clientdata);
921
922void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
923{
924 return hdev->clientdata;
925}
926EXPORT_SYMBOL(nfc_hci_get_clientdata);
927
72b06f75
EL		 928void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
929{
930 nfc_hci_failure(hdev, err);
931}
a9a741a7
EL		 932EXPORT_SYMBOL(nfc_hci_driver_failure);
933
0f450772 934void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
8b8d2e08 935{
412fda53 936 nfc_llc_rcv_from_drv(hdev->llc, skb);
8b8d2e08
EL		 937}
938EXPORT_SYMBOL(nfc_hci_recv_frame);
939
67cccfe1
EL		 940static int __init nfc_hci_init(void)
941{
942 return nfc_llc_init();
943}
944
945static void __exit nfc_hci_exit(void)
946{
947 nfc_llc_exit();
948}
949
412fda53 950subsys_initcall(nfc_hci_init);
67cccfe1
EL		 951module_exit(nfc_hci_exit);
952
8b8d2e08 953MODULE_LICENSE("GPL");
80faa598 954MODULE_DESCRIPTION("NFC HCI Core");
kernel source for telekom puls (alcatel/mediatek)