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 EL |
299 | |
300 | switch (event) { | |
301 | case NFC_HCI_EVT_TARGET_DISCOVERED: | |
8b8d2e08 EL |
302 | if (skb->len < 1) { /* no status data? */ |
303 | r = -EPROTO; | |
304 | goto exit; | |
305 | } | |
306 | ||
307 | if (skb->data[0] == 3) { | |
308 | /* TODO: Multiple targets in field, none activated | |
309 | * poll is supposedly stopped, but there is no | |
310 | * single target to activate, so nothing to report | |
311 | * up. | |
312 | * if we need to restart poll, we must save the | |
313 | * protocols from the initial poll and reuse here. | |
314 | */ | |
315 | } | |
316 | ||
317 | if (skb->data[0] != 0) { | |
318 | r = -EPROTO; | |
319 | goto exit; | |
320 | } | |
321 | ||
74a5b966 | 322 | r = nfc_hci_target_discovered(hdev, gate); |
8b8d2e08 EL |
323 | break; |
324 | default: | |
f7a5f6c5 | 325 | if (hdev->ops->event_received) { |
74a5b966 | 326 | hdev->ops->event_received(hdev, gate, event, skb); |
f7a5f6c5 AW |
327 | return; |
328 | } | |
329 | ||
8b8d2e08 EL |
330 | break; |
331 | } | |
332 | ||
333 | exit: | |
334 | kfree_skb(skb); | |
335 | ||
336 | if (r) { | |
337 | /* TODO: There was an error dispatching the event, | |
338 | * how to propagate up to nfc core? | |
339 | */ | |
340 | } | |
341 | } | |
342 | ||
343 | static void nfc_hci_cmd_timeout(unsigned long data) | |
344 | { | |
345 | struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data; | |
346 | ||
916082b0 | 347 | schedule_work(&hdev->msg_tx_work); |
8b8d2e08 EL |
348 | } |
349 | ||
350 | static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count, | |
a10d595b | 351 | struct nfc_hci_gate *gates) |
8b8d2e08 EL |
352 | { |
353 | int r; | |
8b8d2e08 | 354 | while (gate_count--) { |
a10d595b EL |
355 | r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, |
356 | gates->gate, gates->pipe); | |
8b8d2e08 EL |
357 | if (r < 0) |
358 | return r; | |
a10d595b | 359 | gates++; |
8b8d2e08 EL |
360 | } |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static int hci_dev_session_init(struct nfc_hci_dev *hdev) | |
366 | { | |
367 | struct sk_buff *skb = NULL; | |
368 | int r; | |
a10d595b EL |
369 | |
370 | if (hdev->init_data.gates[0].gate != NFC_HCI_ADMIN_GATE) | |
371 | return -EPROTO; | |
8b8d2e08 EL |
372 | |
373 | r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, | |
a10d595b EL |
374 | hdev->init_data.gates[0].gate, |
375 | hdev->init_data.gates[0].pipe); | |
8b8d2e08 EL |
376 | if (r < 0) |
377 | goto exit; | |
378 | ||
379 | r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE, | |
380 | NFC_HCI_ADMIN_SESSION_IDENTITY, &skb); | |
381 | if (r < 0) | |
382 | goto disconnect_all; | |
383 | ||
384 | if (skb->len && skb->len == strlen(hdev->init_data.session_id)) | |
385 | if (memcmp(hdev->init_data.session_id, skb->data, | |
386 | skb->len) == 0) { | |
387 | /* TODO ELa: restore gate<->pipe table from | |
388 | * some TBD location. | |
389 | * note: it doesn't seem possible to get the chip | |
390 | * currently open gate/pipe table. | |
391 | * It is only possible to obtain the supported | |
392 | * gate list. | |
393 | */ | |
394 | ||
395 | /* goto exit | |
396 | * For now, always do a full initialization */ | |
397 | } | |
398 | ||
399 | r = nfc_hci_disconnect_all_gates(hdev); | |
400 | if (r < 0) | |
401 | goto exit; | |
402 | ||
8b8d2e08 EL |
403 | r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count, |
404 | hdev->init_data.gates); | |
405 | if (r < 0) | |
406 | goto disconnect_all; | |
407 | ||
408 | r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, | |
409 | NFC_HCI_ADMIN_SESSION_IDENTITY, | |
410 | hdev->init_data.session_id, | |
411 | strlen(hdev->init_data.session_id)); | |
412 | if (r == 0) | |
413 | goto exit; | |
414 | ||
415 | disconnect_all: | |
416 | nfc_hci_disconnect_all_gates(hdev); | |
417 | ||
418 | exit: | |
33e59713 | 419 | kfree_skb(skb); |
8b8d2e08 EL |
420 | |
421 | return r; | |
422 | } | |
423 | ||
424 | static int hci_dev_version(struct nfc_hci_dev *hdev) | |
425 | { | |
426 | int r; | |
427 | struct sk_buff *skb; | |
428 | ||
429 | r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, | |
430 | NFC_HCI_ID_MGMT_VERSION_SW, &skb); | |
23f7e6d0 EL |
431 | if (r == -EOPNOTSUPP) { |
432 | pr_info("Software/Hardware info not available\n"); | |
433 | return 0; | |
434 | } | |
8b8d2e08 EL |
435 | if (r < 0) |
436 | return r; | |
437 | ||
438 | if (skb->len != 3) { | |
439 | kfree_skb(skb); | |
440 | return -EINVAL; | |
441 | } | |
442 | ||
443 | hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4; | |
444 | hdev->sw_patch = skb->data[0] & 0x0f; | |
445 | hdev->sw_flashlib_major = skb->data[1]; | |
446 | hdev->sw_flashlib_minor = skb->data[2]; | |
447 | ||
448 | kfree_skb(skb); | |
449 | ||
450 | r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, | |
451 | NFC_HCI_ID_MGMT_VERSION_HW, &skb); | |
452 | if (r < 0) | |
453 | return r; | |
454 | ||
455 | if (skb->len != 3) { | |
456 | kfree_skb(skb); | |
457 | return -EINVAL; | |
458 | } | |
459 | ||
460 | hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5; | |
461 | hdev->hw_version = skb->data[0] & 0x1f; | |
462 | hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6; | |
463 | hdev->hw_software = skb->data[1] & 0x3f; | |
464 | hdev->hw_bsid = skb->data[2]; | |
465 | ||
466 | kfree_skb(skb); | |
467 | ||
468 | pr_info("SOFTWARE INFO:\n"); | |
469 | pr_info("RomLib : %d\n", hdev->sw_romlib); | |
470 | pr_info("Patch : %d\n", hdev->sw_patch); | |
471 | pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major); | |
472 | pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor); | |
473 | pr_info("HARDWARE INFO:\n"); | |
474 | pr_info("Derivative : %d\n", hdev->hw_derivative); | |
475 | pr_info("HW Version : %d\n", hdev->hw_version); | |
476 | pr_info("#MPW : %d\n", hdev->hw_mpw); | |
477 | pr_info("Software : %d\n", hdev->hw_software); | |
478 | pr_info("BSID Version : %d\n", hdev->hw_bsid); | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | static int hci_dev_up(struct nfc_dev *nfc_dev) | |
484 | { | |
485 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
486 | int r = 0; | |
487 | ||
488 | if (hdev->ops->open) { | |
489 | r = hdev->ops->open(hdev); | |
490 | if (r < 0) | |
491 | return r; | |
492 | } | |
493 | ||
412fda53 EL |
494 | r = nfc_llc_start(hdev->llc); |
495 | if (r < 0) | |
496 | goto exit_close; | |
497 | ||
8b8d2e08 EL |
498 | r = hci_dev_session_init(hdev); |
499 | if (r < 0) | |
412fda53 | 500 | goto exit_llc; |
8b8d2e08 EL |
501 | |
502 | r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, | |
503 | NFC_HCI_EVT_END_OPERATION, NULL, 0); | |
504 | if (r < 0) | |
412fda53 | 505 | goto exit_llc; |
8b8d2e08 EL |
506 | |
507 | if (hdev->ops->hci_ready) { | |
508 | r = hdev->ops->hci_ready(hdev); | |
509 | if (r < 0) | |
412fda53 | 510 | goto exit_llc; |
8b8d2e08 EL |
511 | } |
512 | ||
513 | r = hci_dev_version(hdev); | |
514 | if (r < 0) | |
412fda53 EL |
515 | goto exit_llc; |
516 | ||
517 | return 0; | |
518 | ||
519 | exit_llc: | |
520 | nfc_llc_stop(hdev->llc); | |
521 | ||
522 | exit_close: | |
523 | if (hdev->ops->close) | |
524 | hdev->ops->close(hdev); | |
8b8d2e08 | 525 | |
8b8d2e08 EL |
526 | return r; |
527 | } | |
528 | ||
529 | static int hci_dev_down(struct nfc_dev *nfc_dev) | |
530 | { | |
531 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
532 | ||
412fda53 EL |
533 | nfc_llc_stop(hdev->llc); |
534 | ||
8b8d2e08 EL |
535 | if (hdev->ops->close) |
536 | hdev->ops->close(hdev); | |
537 | ||
538 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
fe7c5800 SO |
543 | static int hci_start_poll(struct nfc_dev *nfc_dev, |
544 | u32 im_protocols, u32 tm_protocols) | |
8b8d2e08 EL |
545 | { |
546 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
8b8d2e08 EL |
547 | |
548 | if (hdev->ops->start_poll) | |
fe7c5800 | 549 | return hdev->ops->start_poll(hdev, im_protocols, tm_protocols); |
8b8d2e08 | 550 | else |
03bed29e | 551 | return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
0f450772 SJ |
552 | NFC_HCI_EVT_READER_REQUESTED, |
553 | NULL, 0); | |
8b8d2e08 EL |
554 | } |
555 | ||
556 | static void hci_stop_poll(struct nfc_dev *nfc_dev) | |
557 | { | |
558 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
559 | ||
03bed29e EL |
560 | nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
561 | NFC_HCI_EVT_END_OPERATION, NULL, 0); | |
8b8d2e08 EL |
562 | } |
563 | ||
c40d1740 AW |
564 | static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
565 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
566 | { | |
567 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
568 | ||
569 | if (hdev->ops->dep_link_up) | |
570 | return hdev->ops->dep_link_up(hdev, target, comm_mode, | |
571 | gb, gb_len); | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | static int hci_dep_link_down(struct nfc_dev *nfc_dev) | |
577 | { | |
578 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
579 | ||
580 | if (hdev->ops->dep_link_down) | |
581 | return hdev->ops->dep_link_down(hdev); | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
90099433 EL |
586 | static int hci_activate_target(struct nfc_dev *nfc_dev, |
587 | struct nfc_target *target, u32 protocol) | |
8b8d2e08 | 588 | { |
8b8d2e08 EL |
589 | return 0; |
590 | } | |
591 | ||
90099433 EL |
592 | static void hci_deactivate_target(struct nfc_dev *nfc_dev, |
593 | struct nfc_target *target) | |
8b8d2e08 EL |
594 | { |
595 | } | |
596 | ||
f3e8fb55 EL |
597 | #define HCI_CB_TYPE_TRANSCEIVE 1 |
598 | ||
599 | static void hci_transceive_cb(void *context, struct sk_buff *skb, int err) | |
600 | { | |
601 | struct nfc_hci_dev *hdev = context; | |
602 | ||
603 | switch (hdev->async_cb_type) { | |
604 | case HCI_CB_TYPE_TRANSCEIVE: | |
605 | /* | |
606 | * TODO: Check RF Error indicator to make sure data is valid. | |
607 | * It seems that HCI cmd can complete without error, but data | |
608 | * can be invalid if an RF error occured? Ignore for now. | |
609 | */ | |
610 | if (err == 0) | |
611 | skb_trim(skb, skb->len - 1); /* RF Err ind */ | |
612 | ||
613 | hdev->async_cb(hdev->async_cb_context, skb, err); | |
614 | break; | |
615 | default: | |
616 | if (err == 0) | |
617 | kfree_skb(skb); | |
618 | break; | |
619 | } | |
620 | } | |
621 | ||
be9ae4ce SO |
622 | static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, |
623 | struct sk_buff *skb, data_exchange_cb_t cb, | |
624 | void *cb_context) | |
8b8d2e08 EL |
625 | { |
626 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
627 | int r; | |
8b8d2e08 | 628 | |
90099433 | 629 | pr_debug("target_idx=%d\n", target->idx); |
8b8d2e08 EL |
630 | |
631 | switch (target->hci_reader_gate) { | |
632 | case NFC_HCI_RF_READER_A_GATE: | |
633 | case NFC_HCI_RF_READER_B_GATE: | |
e8107623 AW |
634 | if (hdev->ops->im_transceive) { |
635 | r = hdev->ops->im_transceive(hdev, target, skb, cb, | |
f3e8fb55 | 636 | cb_context); |
8b8d2e08 EL |
637 | if (r <= 0) /* handled */ |
638 | break; | |
639 | } | |
640 | ||
641 | *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */ | |
f3e8fb55 EL |
642 | |
643 | hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE; | |
644 | hdev->async_cb = cb; | |
645 | hdev->async_cb_context = cb_context; | |
646 | ||
647 | r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, | |
648 | NFC_HCI_WR_XCHG_DATA, skb->data, | |
649 | skb->len, hci_transceive_cb, hdev); | |
8b8d2e08 EL |
650 | break; |
651 | default: | |
e8107623 AW |
652 | if (hdev->ops->im_transceive) { |
653 | r = hdev->ops->im_transceive(hdev, target, skb, cb, | |
f3e8fb55 | 654 | cb_context); |
8b8d2e08 EL |
655 | if (r == 1) |
656 | r = -ENOTSUPP; | |
0f450772 | 657 | } else { |
8b8d2e08 | 658 | r = -ENOTSUPP; |
0f450772 | 659 | } |
f3e8fb55 | 660 | break; |
8b8d2e08 EL |
661 | } |
662 | ||
663 | kfree_skb(skb); | |
664 | ||
f3e8fb55 | 665 | return r; |
8b8d2e08 EL |
666 | } |
667 | ||
984d334f | 668 | static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
e8107623 AW |
669 | { |
670 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
671 | ||
672 | if (hdev->ops->tm_send) | |
673 | return hdev->ops->tm_send(hdev, skb); | |
674 | else | |
675 | return -ENOTSUPP; | |
676 | } | |
677 | ||
1676f751 EL |
678 | static int hci_check_presence(struct nfc_dev *nfc_dev, |
679 | struct nfc_target *target) | |
680 | { | |
681 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
682 | ||
683 | if (hdev->ops->check_presence) | |
684 | return hdev->ops->check_presence(hdev, target); | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
412fda53 EL |
689 | static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err) |
690 | { | |
691 | mutex_lock(&hdev->msg_tx_mutex); | |
692 | ||
693 | if (hdev->cmd_pending_msg == NULL) { | |
694 | nfc_driver_failure(hdev->ndev, err); | |
695 | goto exit; | |
696 | } | |
697 | ||
698 | __nfc_hci_cmd_completion(hdev, err, NULL); | |
699 | ||
700 | exit: | |
701 | mutex_unlock(&hdev->msg_tx_mutex); | |
702 | } | |
703 | ||
704 | static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err) | |
705 | { | |
706 | nfc_hci_failure(hdev, err); | |
707 | } | |
708 | ||
709 | static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb) | |
710 | { | |
711 | struct hcp_packet *packet; | |
712 | u8 type; | |
713 | u8 instruction; | |
714 | struct sk_buff *hcp_skb; | |
715 | u8 pipe; | |
716 | struct sk_buff *frag_skb; | |
717 | int msg_len; | |
718 | ||
719 | packet = (struct hcp_packet *)skb->data; | |
720 | if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) { | |
721 | skb_queue_tail(&hdev->rx_hcp_frags, skb); | |
722 | return; | |
723 | } | |
724 | ||
725 | /* it's the last fragment. Does it need re-aggregation? */ | |
726 | if (skb_queue_len(&hdev->rx_hcp_frags)) { | |
727 | pipe = packet->header & NFC_HCI_FRAGMENT; | |
728 | skb_queue_tail(&hdev->rx_hcp_frags, skb); | |
729 | ||
730 | msg_len = 0; | |
731 | skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { | |
732 | msg_len += (frag_skb->len - | |
733 | NFC_HCI_HCP_PACKET_HEADER_LEN); | |
734 | } | |
735 | ||
736 | hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN + | |
737 | msg_len, GFP_KERNEL); | |
738 | if (hcp_skb == NULL) { | |
739 | nfc_hci_failure(hdev, -ENOMEM); | |
740 | return; | |
741 | } | |
742 | ||
743 | *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe; | |
744 | ||
745 | skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { | |
746 | msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN; | |
747 | memcpy(skb_put(hcp_skb, msg_len), | |
748 | frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN, | |
749 | msg_len); | |
750 | } | |
751 | ||
752 | skb_queue_purge(&hdev->rx_hcp_frags); | |
753 | } else { | |
754 | packet->header &= NFC_HCI_FRAGMENT; | |
755 | hcp_skb = skb; | |
756 | } | |
757 | ||
758 | /* if this is a response, dispatch immediately to | |
759 | * unblock waiting cmd context. Otherwise, enqueue to dispatch | |
760 | * in separate context where handler can also execute command. | |
761 | */ | |
762 | packet = (struct hcp_packet *)hcp_skb->data; | |
763 | type = HCP_MSG_GET_TYPE(packet->message.header); | |
764 | if (type == NFC_HCI_HCP_RESPONSE) { | |
765 | pipe = packet->header; | |
766 | instruction = HCP_MSG_GET_CMD(packet->message.header); | |
767 | skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN + | |
768 | NFC_HCI_HCP_MESSAGE_HEADER_LEN); | |
769 | nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb); | |
770 | } else { | |
771 | skb_queue_tail(&hdev->msg_rx_queue, hcp_skb); | |
916082b0 | 772 | schedule_work(&hdev->msg_rx_work); |
412fda53 EL |
773 | } |
774 | } | |
775 | ||
bd007bea | 776 | static struct nfc_ops hci_nfc_ops = { |
8b8d2e08 EL |
777 | .dev_up = hci_dev_up, |
778 | .dev_down = hci_dev_down, | |
779 | .start_poll = hci_start_poll, | |
780 | .stop_poll = hci_stop_poll, | |
c40d1740 AW |
781 | .dep_link_up = hci_dep_link_up, |
782 | .dep_link_down = hci_dep_link_down, | |
8b8d2e08 EL |
783 | .activate_target = hci_activate_target, |
784 | .deactivate_target = hci_deactivate_target, | |
be9ae4ce | 785 | .im_transceive = hci_transceive, |
e8107623 | 786 | .tm_send = hci_tm_send, |
1676f751 | 787 | .check_presence = hci_check_presence, |
8b8d2e08 EL |
788 | }; |
789 | ||
790 | struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, | |
791 | struct nfc_hci_init_data *init_data, | |
792 | u32 protocols, | |
412fda53 | 793 | const char *llc_name, |
8b8d2e08 EL |
794 | int tx_headroom, |
795 | int tx_tailroom, | |
796 | int max_link_payload) | |
797 | { | |
798 | struct nfc_hci_dev *hdev; | |
799 | ||
800 | if (ops->xmit == NULL) | |
801 | return NULL; | |
802 | ||
803 | if (protocols == 0) | |
804 | return NULL; | |
805 | ||
806 | hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL); | |
807 | if (hdev == NULL) | |
808 | return NULL; | |
809 | ||
412fda53 EL |
810 | hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit, |
811 | nfc_hci_recv_from_llc, tx_headroom, | |
812 | tx_tailroom, nfc_hci_llc_failure); | |
813 | if (hdev->llc == NULL) { | |
814 | kfree(hdev); | |
815 | return NULL; | |
816 | } | |
817 | ||
8b8d2e08 EL |
818 | hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, |
819 | tx_headroom + HCI_CMDS_HEADROOM, | |
820 | tx_tailroom); | |
821 | if (!hdev->ndev) { | |
412fda53 | 822 | nfc_llc_free(hdev->llc); |
8b8d2e08 EL |
823 | kfree(hdev); |
824 | return NULL; | |
825 | } | |
826 | ||
827 | hdev->ops = ops; | |
828 | hdev->max_data_link_payload = max_link_payload; | |
829 | hdev->init_data = *init_data; | |
830 | ||
831 | nfc_set_drvdata(hdev->ndev, hdev); | |
832 | ||
833 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); | |
834 | ||
835 | return hdev; | |
836 | } | |
837 | EXPORT_SYMBOL(nfc_hci_allocate_device); | |
838 | ||
839 | void nfc_hci_free_device(struct nfc_hci_dev *hdev) | |
840 | { | |
841 | nfc_free_device(hdev->ndev); | |
412fda53 | 842 | nfc_llc_free(hdev->llc); |
8b8d2e08 EL |
843 | kfree(hdev); |
844 | } | |
845 | EXPORT_SYMBOL(nfc_hci_free_device); | |
846 | ||
847 | int nfc_hci_register_device(struct nfc_hci_dev *hdev) | |
848 | { | |
8b8d2e08 EL |
849 | mutex_init(&hdev->msg_tx_mutex); |
850 | ||
851 | INIT_LIST_HEAD(&hdev->msg_tx_queue); | |
852 | ||
853 | INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work); | |
8b8d2e08 EL |
854 | |
855 | init_timer(&hdev->cmd_timer); | |
856 | hdev->cmd_timer.data = (unsigned long)hdev; | |
857 | hdev->cmd_timer.function = nfc_hci_cmd_timeout; | |
858 | ||
859 | skb_queue_head_init(&hdev->rx_hcp_frags); | |
860 | ||
861 | INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work); | |
8b8d2e08 EL |
862 | |
863 | skb_queue_head_init(&hdev->msg_rx_queue); | |
864 | ||
474fee3d | 865 | return nfc_register_device(hdev->ndev); |
8b8d2e08 EL |
866 | } |
867 | EXPORT_SYMBOL(nfc_hci_register_device); | |
868 | ||
869 | void nfc_hci_unregister_device(struct nfc_hci_dev *hdev) | |
870 | { | |
1913e57c | 871 | struct hci_msg *msg, *n; |
8b8d2e08 | 872 | |
f0c91038 EL |
873 | mutex_lock(&hdev->msg_tx_mutex); |
874 | ||
875 | if (hdev->cmd_pending_msg) { | |
876 | if (hdev->cmd_pending_msg->cb) | |
877 | hdev->cmd_pending_msg->cb( | |
878 | hdev->cmd_pending_msg->cb_context, | |
879 | NULL, -ESHUTDOWN); | |
880 | kfree(hdev->cmd_pending_msg); | |
881 | hdev->cmd_pending_msg = NULL; | |
882 | } | |
883 | ||
884 | hdev->shutting_down = true; | |
885 | ||
886 | mutex_unlock(&hdev->msg_tx_mutex); | |
887 | ||
888 | del_timer_sync(&hdev->cmd_timer); | |
889 | cancel_work_sync(&hdev->msg_tx_work); | |
890 | ||
891 | cancel_work_sync(&hdev->msg_rx_work); | |
892 | ||
893 | nfc_unregister_device(hdev->ndev); | |
894 | ||
8b8d2e08 EL |
895 | skb_queue_purge(&hdev->rx_hcp_frags); |
896 | skb_queue_purge(&hdev->msg_rx_queue); | |
897 | ||
1913e57c | 898 | list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) { |
8b8d2e08 EL |
899 | list_del(&msg->msg_l); |
900 | skb_queue_purge(&msg->msg_frags); | |
901 | kfree(msg); | |
902 | } | |
8b8d2e08 EL |
903 | } |
904 | EXPORT_SYMBOL(nfc_hci_unregister_device); | |
905 | ||
906 | void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata) | |
907 | { | |
908 | hdev->clientdata = clientdata; | |
909 | } | |
910 | EXPORT_SYMBOL(nfc_hci_set_clientdata); | |
911 | ||
912 | void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev) | |
913 | { | |
914 | return hdev->clientdata; | |
915 | } | |
916 | EXPORT_SYMBOL(nfc_hci_get_clientdata); | |
917 | ||
72b06f75 EL |
918 | void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err) |
919 | { | |
920 | nfc_hci_failure(hdev, err); | |
921 | } | |
a9a741a7 EL |
922 | EXPORT_SYMBOL(nfc_hci_driver_failure); |
923 | ||
0f450772 | 924 | void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb) |
8b8d2e08 | 925 | { |
412fda53 | 926 | nfc_llc_rcv_from_drv(hdev->llc, skb); |
8b8d2e08 EL |
927 | } |
928 | EXPORT_SYMBOL(nfc_hci_recv_frame); | |
929 | ||
67cccfe1 EL |
930 | static int __init nfc_hci_init(void) |
931 | { | |
932 | return nfc_llc_init(); | |
933 | } | |
934 | ||
935 | static void __exit nfc_hci_exit(void) | |
936 | { | |
937 | nfc_llc_exit(); | |
938 | } | |
939 | ||
412fda53 | 940 | subsys_initcall(nfc_hci_init); |
67cccfe1 EL |
941 | module_exit(nfc_hci_exit); |
942 | ||
8b8d2e08 | 943 | MODULE_LICENSE("GPL"); |
80faa598 | 944 | MODULE_DESCRIPTION("NFC HCI Core"); |