Commit | Line | Data |
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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 | 36 | int 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 | 49 | EXPORT_SYMBOL(nfc_hci_result_to_errno); |
6c1c5b9e | 50 | |
8b8d2e08 EL |
51 | static 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 | ||
78 | next_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 | ||
110 | exit: | |
111 | mutex_unlock(&hdev->msg_tx_mutex); | |
112 | } | |
113 | ||
114 | static 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 |
136 | static 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 | ||
153 | void 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 | |
165 | exit: | |
166 | mutex_unlock(&hdev->msg_tx_mutex); | |
167 | } | |
168 | ||
169 | void 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 | 175 | u32 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 | 190 | EXPORT_SYMBOL(nfc_hci_sak_to_protocol); |
8b8d2e08 | 191 | |
f7a5f6c5 | 192 | int 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 | |
279 | exit: | |
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 | 287 | EXPORT_SYMBOL(nfc_hci_target_discovered); |
8b8d2e08 EL |
288 | |
289 | void 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 | ||
336 | exit: | |
337 | kfree_skb(skb); | |
338 | ||
27c31191 | 339 | exit_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 | ||
347 | static 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 | ||
354 | static 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 | ||
369 | static 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 | ||
419 | disconnect_all: | |
420 | nfc_hci_disconnect_all_gates(hdev); | |
421 | ||
422 | exit: | |
33e59713 | 423 | kfree_skb(skb); |
8b8d2e08 EL |
424 | |
425 | return r; | |
426 | } | |
427 | ||
428 | static 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 | ||
487 | static 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 | ||
523 | exit_llc: | |
524 | nfc_llc_stop(hdev->llc); | |
525 | ||
526 | exit_close: | |
527 | if (hdev->ops->close) | |
528 | hdev->ops->close(hdev); | |
8b8d2e08 | 529 | |
8b8d2e08 EL |
530 | return r; |
531 | } | |
532 | ||
533 | static 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 |
547 | static 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 | ||
560 | static 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 |
568 | static 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 | ||
a395298c SO |
573 | if (!hdev->ops->dep_link_up) |
574 | return 0; | |
c40d1740 | 575 | |
a395298c SO |
576 | return hdev->ops->dep_link_up(hdev, target, comm_mode, |
577 | gb, gb_len); | |
c40d1740 AW |
578 | } |
579 | ||
580 | static int hci_dep_link_down(struct nfc_dev *nfc_dev) | |
581 | { | |
582 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
583 | ||
a395298c SO |
584 | if (!hdev->ops->dep_link_down) |
585 | return 0; | |
c40d1740 | 586 | |
a395298c | 587 | return hdev->ops->dep_link_down(hdev); |
c40d1740 AW |
588 | } |
589 | ||
90099433 EL |
590 | static 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 |
596 | static 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 | ||
603 | static 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 |
626 | static 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 | 672 | static 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 | ||
a395298c SO |
676 | if (!hdev->ops->tm_send) { |
677 | kfree_skb(skb); | |
678 | return -ENOTSUPP; | |
679 | } | |
924d4a02 | 680 | |
a395298c | 681 | return hdev->ops->tm_send(hdev, skb); |
e8107623 AW |
682 | } |
683 | ||
1676f751 EL |
684 | static 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 | ||
a395298c SO |
689 | if (!hdev->ops->check_presence) |
690 | return 0; | |
1676f751 | 691 | |
a395298c | 692 | return hdev->ops->check_presence(hdev, target); |
1676f751 EL |
693 | } |
694 | ||
412fda53 EL |
695 | static 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 | ||
706 | exit: | |
707 | mutex_unlock(&hdev->msg_tx_mutex); | |
708 | } | |
709 | ||
710 | static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err) | |
711 | { | |
712 | nfc_hci_failure(hdev, err); | |
713 | } | |
714 | ||
715 | static 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 | ||
9a695d23 EL |
782 | static int hci_fw_upload(struct nfc_dev *nfc_dev, const char *firmware_name) |
783 | { | |
784 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
785 | ||
a395298c SO |
786 | if (!hdev->ops->fw_upload) |
787 | return -ENOTSUPP; | |
9a695d23 | 788 | |
a395298c | 789 | return hdev->ops->fw_upload(hdev, firmware_name); |
9a695d23 EL |
790 | } |
791 | ||
bd007bea | 792 | static struct nfc_ops hci_nfc_ops = { |
8b8d2e08 EL |
793 | .dev_up = hci_dev_up, |
794 | .dev_down = hci_dev_down, | |
795 | .start_poll = hci_start_poll, | |
796 | .stop_poll = hci_stop_poll, | |
c40d1740 AW |
797 | .dep_link_up = hci_dep_link_up, |
798 | .dep_link_down = hci_dep_link_down, | |
8b8d2e08 EL |
799 | .activate_target = hci_activate_target, |
800 | .deactivate_target = hci_deactivate_target, | |
be9ae4ce | 801 | .im_transceive = hci_transceive, |
e8107623 | 802 | .tm_send = hci_tm_send, |
1676f751 | 803 | .check_presence = hci_check_presence, |
9a695d23 | 804 | .fw_upload = hci_fw_upload, |
8b8d2e08 EL |
805 | }; |
806 | ||
807 | struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, | |
808 | struct nfc_hci_init_data *init_data, | |
bf71ab8b | 809 | unsigned long quirks, |
8b8d2e08 | 810 | u32 protocols, |
412fda53 | 811 | const char *llc_name, |
8b8d2e08 EL |
812 | int tx_headroom, |
813 | int tx_tailroom, | |
814 | int max_link_payload) | |
815 | { | |
816 | struct nfc_hci_dev *hdev; | |
817 | ||
818 | if (ops->xmit == NULL) | |
819 | return NULL; | |
820 | ||
821 | if (protocols == 0) | |
822 | return NULL; | |
823 | ||
824 | hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL); | |
825 | if (hdev == NULL) | |
826 | return NULL; | |
827 | ||
412fda53 EL |
828 | hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit, |
829 | nfc_hci_recv_from_llc, tx_headroom, | |
830 | tx_tailroom, nfc_hci_llc_failure); | |
831 | if (hdev->llc == NULL) { | |
832 | kfree(hdev); | |
833 | return NULL; | |
834 | } | |
835 | ||
0b456c41 | 836 | hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, |
8b8d2e08 EL |
837 | tx_headroom + HCI_CMDS_HEADROOM, |
838 | tx_tailroom); | |
839 | if (!hdev->ndev) { | |
412fda53 | 840 | nfc_llc_free(hdev->llc); |
8b8d2e08 EL |
841 | kfree(hdev); |
842 | return NULL; | |
843 | } | |
844 | ||
845 | hdev->ops = ops; | |
846 | hdev->max_data_link_payload = max_link_payload; | |
847 | hdev->init_data = *init_data; | |
848 | ||
849 | nfc_set_drvdata(hdev->ndev, hdev); | |
850 | ||
851 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); | |
852 | ||
bf71ab8b EL |
853 | hdev->quirks = quirks; |
854 | ||
8b8d2e08 EL |
855 | return hdev; |
856 | } | |
857 | EXPORT_SYMBOL(nfc_hci_allocate_device); | |
858 | ||
859 | void nfc_hci_free_device(struct nfc_hci_dev *hdev) | |
860 | { | |
861 | nfc_free_device(hdev->ndev); | |
412fda53 | 862 | nfc_llc_free(hdev->llc); |
8b8d2e08 EL |
863 | kfree(hdev); |
864 | } | |
865 | EXPORT_SYMBOL(nfc_hci_free_device); | |
866 | ||
867 | int nfc_hci_register_device(struct nfc_hci_dev *hdev) | |
868 | { | |
8b8d2e08 EL |
869 | mutex_init(&hdev->msg_tx_mutex); |
870 | ||
871 | INIT_LIST_HEAD(&hdev->msg_tx_queue); | |
872 | ||
873 | INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work); | |
8b8d2e08 EL |
874 | |
875 | init_timer(&hdev->cmd_timer); | |
876 | hdev->cmd_timer.data = (unsigned long)hdev; | |
877 | hdev->cmd_timer.function = nfc_hci_cmd_timeout; | |
878 | ||
879 | skb_queue_head_init(&hdev->rx_hcp_frags); | |
880 | ||
881 | INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work); | |
8b8d2e08 EL |
882 | |
883 | skb_queue_head_init(&hdev->msg_rx_queue); | |
884 | ||
474fee3d | 885 | return nfc_register_device(hdev->ndev); |
8b8d2e08 EL |
886 | } |
887 | EXPORT_SYMBOL(nfc_hci_register_device); | |
888 | ||
889 | void nfc_hci_unregister_device(struct nfc_hci_dev *hdev) | |
890 | { | |
1913e57c | 891 | struct hci_msg *msg, *n; |
8b8d2e08 | 892 | |
f0c91038 EL |
893 | mutex_lock(&hdev->msg_tx_mutex); |
894 | ||
895 | if (hdev->cmd_pending_msg) { | |
896 | if (hdev->cmd_pending_msg->cb) | |
897 | hdev->cmd_pending_msg->cb( | |
898 | hdev->cmd_pending_msg->cb_context, | |
899 | NULL, -ESHUTDOWN); | |
900 | kfree(hdev->cmd_pending_msg); | |
901 | hdev->cmd_pending_msg = NULL; | |
902 | } | |
903 | ||
904 | hdev->shutting_down = true; | |
905 | ||
906 | mutex_unlock(&hdev->msg_tx_mutex); | |
907 | ||
908 | del_timer_sync(&hdev->cmd_timer); | |
909 | cancel_work_sync(&hdev->msg_tx_work); | |
910 | ||
911 | cancel_work_sync(&hdev->msg_rx_work); | |
912 | ||
913 | nfc_unregister_device(hdev->ndev); | |
914 | ||
8b8d2e08 EL |
915 | skb_queue_purge(&hdev->rx_hcp_frags); |
916 | skb_queue_purge(&hdev->msg_rx_queue); | |
917 | ||
1913e57c | 918 | list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) { |
8b8d2e08 EL |
919 | list_del(&msg->msg_l); |
920 | skb_queue_purge(&msg->msg_frags); | |
921 | kfree(msg); | |
922 | } | |
8b8d2e08 EL |
923 | } |
924 | EXPORT_SYMBOL(nfc_hci_unregister_device); | |
925 | ||
926 | void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata) | |
927 | { | |
928 | hdev->clientdata = clientdata; | |
929 | } | |
930 | EXPORT_SYMBOL(nfc_hci_set_clientdata); | |
931 | ||
932 | void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev) | |
933 | { | |
934 | return hdev->clientdata; | |
935 | } | |
936 | EXPORT_SYMBOL(nfc_hci_get_clientdata); | |
937 | ||
72b06f75 EL |
938 | void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err) |
939 | { | |
940 | nfc_hci_failure(hdev, err); | |
941 | } | |
a9a741a7 EL |
942 | EXPORT_SYMBOL(nfc_hci_driver_failure); |
943 | ||
0f450772 | 944 | void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb) |
8b8d2e08 | 945 | { |
412fda53 | 946 | nfc_llc_rcv_from_drv(hdev->llc, skb); |
8b8d2e08 EL |
947 | } |
948 | EXPORT_SYMBOL(nfc_hci_recv_frame); | |
949 | ||
67cccfe1 EL |
950 | static int __init nfc_hci_init(void) |
951 | { | |
952 | return nfc_llc_init(); | |
953 | } | |
954 | ||
955 | static void __exit nfc_hci_exit(void) | |
956 | { | |
957 | nfc_llc_exit(); | |
958 | } | |
959 | ||
412fda53 | 960 | subsys_initcall(nfc_hci_init); |
67cccfe1 EL |
961 | module_exit(nfc_hci_exit); |
962 | ||
8b8d2e08 | 963 | MODULE_LICENSE("GPL"); |
80faa598 | 964 | MODULE_DESCRIPTION("NFC HCI Core"); |