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 | |
98b32dec | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
8b8d2e08 EL |
16 | */ |
17 | ||
18 | #define pr_fmt(fmt) "hci: %s: " fmt, __func__ | |
19 | ||
20 | #include <linux/init.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/nfc.h> | |
24 | ||
25 | #include <net/nfc/nfc.h> | |
26 | #include <net/nfc/hci.h> | |
67cccfe1 | 27 | #include <net/nfc/llc.h> |
8b8d2e08 EL |
28 | |
29 | #include "hci.h" | |
30 | ||
31 | /* Largest headroom needed for outgoing HCI commands */ | |
32 | #define HCI_CMDS_HEADROOM 1 | |
33 | ||
84d48190 | 34 | int nfc_hci_result_to_errno(u8 result) |
6c1c5b9e EL |
35 | { |
36 | switch (result) { | |
37 | case NFC_HCI_ANY_OK: | |
38 | return 0; | |
23f7e6d0 EL |
39 | case NFC_HCI_ANY_E_REG_PAR_UNKNOWN: |
40 | return -EOPNOTSUPP; | |
6c1c5b9e EL |
41 | case NFC_HCI_ANY_E_TIMEOUT: |
42 | return -ETIME; | |
43 | default: | |
44 | return -1; | |
45 | } | |
46 | } | |
84d48190 | 47 | EXPORT_SYMBOL(nfc_hci_result_to_errno); |
6c1c5b9e | 48 | |
8b8d2e08 EL |
49 | static void nfc_hci_msg_tx_work(struct work_struct *work) |
50 | { | |
51 | struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev, | |
52 | msg_tx_work); | |
53 | struct hci_msg *msg; | |
54 | struct sk_buff *skb; | |
55 | int r = 0; | |
56 | ||
57 | mutex_lock(&hdev->msg_tx_mutex); | |
f0c91038 EL |
58 | if (hdev->shutting_down) |
59 | goto exit; | |
8b8d2e08 EL |
60 | |
61 | if (hdev->cmd_pending_msg) { | |
62 | if (timer_pending(&hdev->cmd_timer) == 0) { | |
63 | if (hdev->cmd_pending_msg->cb) | |
b5faa648 | 64 | hdev->cmd_pending_msg->cb(hdev-> |
8b8d2e08 | 65 | cmd_pending_msg-> |
b5faa648 EL |
66 | cb_context, |
67 | NULL, | |
68 | -ETIME); | |
8b8d2e08 EL |
69 | kfree(hdev->cmd_pending_msg); |
70 | hdev->cmd_pending_msg = NULL; | |
0f450772 | 71 | } else { |
8b8d2e08 | 72 | goto exit; |
0f450772 | 73 | } |
8b8d2e08 EL |
74 | } |
75 | ||
76 | next_msg: | |
77 | if (list_empty(&hdev->msg_tx_queue)) | |
78 | goto exit; | |
79 | ||
80 | msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg, msg_l); | |
81 | list_del(&msg->msg_l); | |
82 | ||
83 | pr_debug("msg_tx_queue has a cmd to send\n"); | |
84 | while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) { | |
412fda53 | 85 | r = nfc_llc_xmit_from_hci(hdev->llc, skb); |
8b8d2e08 EL |
86 | if (r < 0) { |
87 | kfree_skb(skb); | |
88 | skb_queue_purge(&msg->msg_frags); | |
89 | if (msg->cb) | |
b5faa648 | 90 | msg->cb(msg->cb_context, NULL, r); |
8b8d2e08 EL |
91 | kfree(msg); |
92 | break; | |
93 | } | |
94 | } | |
95 | ||
96 | if (r) | |
97 | goto next_msg; | |
98 | ||
99 | if (msg->wait_response == false) { | |
100 | kfree(msg); | |
101 | goto next_msg; | |
102 | } | |
103 | ||
104 | hdev->cmd_pending_msg = msg; | |
105 | mod_timer(&hdev->cmd_timer, jiffies + | |
106 | msecs_to_jiffies(hdev->cmd_pending_msg->completion_delay)); | |
107 | ||
108 | exit: | |
109 | mutex_unlock(&hdev->msg_tx_mutex); | |
110 | } | |
111 | ||
112 | static void nfc_hci_msg_rx_work(struct work_struct *work) | |
113 | { | |
114 | struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev, | |
115 | msg_rx_work); | |
116 | struct sk_buff *skb; | |
117 | struct hcp_message *message; | |
118 | u8 pipe; | |
119 | u8 type; | |
120 | u8 instruction; | |
121 | ||
122 | while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) { | |
123 | pipe = skb->data[0]; | |
124 | skb_pull(skb, NFC_HCI_HCP_PACKET_HEADER_LEN); | |
125 | message = (struct hcp_message *)skb->data; | |
126 | type = HCP_MSG_GET_TYPE(message->header); | |
127 | instruction = HCP_MSG_GET_CMD(message->header); | |
128 | skb_pull(skb, NFC_HCI_HCP_MESSAGE_HEADER_LEN); | |
129 | ||
130 | nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, skb); | |
131 | } | |
132 | } | |
133 | ||
ccca0d6e EL |
134 | static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err, |
135 | struct sk_buff *skb) | |
8b8d2e08 | 136 | { |
8b8d2e08 EL |
137 | del_timer_sync(&hdev->cmd_timer); |
138 | ||
139 | if (hdev->cmd_pending_msg->cb) | |
b5faa648 EL |
140 | hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context, |
141 | skb, err); | |
8b8d2e08 EL |
142 | else |
143 | kfree_skb(skb); | |
144 | ||
145 | kfree(hdev->cmd_pending_msg); | |
146 | hdev->cmd_pending_msg = NULL; | |
147 | ||
916082b0 | 148 | schedule_work(&hdev->msg_tx_work); |
ccca0d6e EL |
149 | } |
150 | ||
151 | void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result, | |
152 | struct sk_buff *skb) | |
153 | { | |
154 | mutex_lock(&hdev->msg_tx_mutex); | |
155 | ||
156 | if (hdev->cmd_pending_msg == NULL) { | |
157 | kfree_skb(skb); | |
158 | goto exit; | |
159 | } | |
160 | ||
161 | __nfc_hci_cmd_completion(hdev, nfc_hci_result_to_errno(result), skb); | |
8b8d2e08 EL |
162 | |
163 | exit: | |
164 | mutex_unlock(&hdev->msg_tx_mutex); | |
165 | } | |
166 | ||
167 | void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd, | |
168 | struct sk_buff *skb) | |
169 | { | |
170 | kfree_skb(skb); | |
171 | } | |
172 | ||
9c5121a0 | 173 | u32 nfc_hci_sak_to_protocol(u8 sak) |
8b8d2e08 EL |
174 | { |
175 | switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) { | |
176 | case NFC_HCI_TYPE_A_SEL_PROT_MIFARE: | |
177 | return NFC_PROTO_MIFARE_MASK; | |
178 | case NFC_HCI_TYPE_A_SEL_PROT_ISO14443: | |
179 | return NFC_PROTO_ISO14443_MASK; | |
180 | case NFC_HCI_TYPE_A_SEL_PROT_DEP: | |
181 | return NFC_PROTO_NFC_DEP_MASK; | |
182 | case NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP: | |
183 | return NFC_PROTO_ISO14443_MASK | NFC_PROTO_NFC_DEP_MASK; | |
184 | default: | |
185 | return 0xffffffff; | |
186 | } | |
187 | } | |
9c5121a0 | 188 | EXPORT_SYMBOL(nfc_hci_sak_to_protocol); |
8b8d2e08 | 189 | |
f7a5f6c5 | 190 | int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate) |
8b8d2e08 EL |
191 | { |
192 | struct nfc_target *targets; | |
193 | struct sk_buff *atqa_skb = NULL; | |
194 | struct sk_buff *sak_skb = NULL; | |
81b30395 | 195 | struct sk_buff *uid_skb = NULL; |
8b8d2e08 EL |
196 | int r; |
197 | ||
198 | pr_debug("from gate %d\n", gate); | |
199 | ||
200 | targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); | |
201 | if (targets == NULL) | |
202 | return -ENOMEM; | |
203 | ||
204 | switch (gate) { | |
205 | case NFC_HCI_RF_READER_A_GATE: | |
206 | r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE, | |
207 | NFC_HCI_RF_READER_A_ATQA, &atqa_skb); | |
208 | if (r < 0) | |
209 | goto exit; | |
210 | ||
211 | r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE, | |
212 | NFC_HCI_RF_READER_A_SAK, &sak_skb); | |
213 | if (r < 0) | |
214 | goto exit; | |
215 | ||
216 | if (atqa_skb->len != 2 || sak_skb->len != 1) { | |
217 | r = -EPROTO; | |
218 | goto exit; | |
219 | } | |
220 | ||
221 | targets->supported_protocols = | |
222 | nfc_hci_sak_to_protocol(sak_skb->data[0]); | |
223 | if (targets->supported_protocols == 0xffffffff) { | |
224 | r = -EPROTO; | |
225 | goto exit; | |
226 | } | |
227 | ||
228 | targets->sens_res = be16_to_cpu(*(u16 *)atqa_skb->data); | |
229 | targets->sel_res = sak_skb->data[0]; | |
230 | ||
81b30395 EL |
231 | r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE, |
232 | NFC_HCI_RF_READER_A_UID, &uid_skb); | |
233 | if (r < 0) | |
234 | goto exit; | |
235 | ||
236 | if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) { | |
237 | r = -EPROTO; | |
238 | goto exit; | |
239 | } | |
240 | ||
241 | memcpy(targets->nfcid1, uid_skb->data, uid_skb->len); | |
242 | targets->nfcid1_len = uid_skb->len; | |
243 | ||
8b8d2e08 EL |
244 | if (hdev->ops->complete_target_discovered) { |
245 | r = hdev->ops->complete_target_discovered(hdev, gate, | |
246 | targets); | |
247 | if (r < 0) | |
248 | goto exit; | |
249 | } | |
250 | break; | |
251 | case NFC_HCI_RF_READER_B_GATE: | |
01d719a2 | 252 | targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK; |
8b8d2e08 EL |
253 | break; |
254 | default: | |
255 | if (hdev->ops->target_from_gate) | |
256 | r = hdev->ops->target_from_gate(hdev, gate, targets); | |
257 | else | |
258 | r = -EPROTO; | |
259 | if (r < 0) | |
260 | goto exit; | |
261 | ||
262 | if (hdev->ops->complete_target_discovered) { | |
263 | r = hdev->ops->complete_target_discovered(hdev, gate, | |
264 | targets); | |
265 | if (r < 0) | |
266 | goto exit; | |
267 | } | |
268 | break; | |
269 | } | |
270 | ||
928326f2 AW |
271 | /* if driver set the new gate, we will skip the old one */ |
272 | if (targets->hci_reader_gate == 0x00) | |
273 | targets->hci_reader_gate = gate; | |
8b8d2e08 EL |
274 | |
275 | r = nfc_targets_found(hdev->ndev, targets, 1); | |
8b8d2e08 EL |
276 | |
277 | exit: | |
278 | kfree(targets); | |
279 | kfree_skb(atqa_skb); | |
280 | kfree_skb(sak_skb); | |
81b30395 | 281 | kfree_skb(uid_skb); |
8b8d2e08 EL |
282 | |
283 | return r; | |
284 | } | |
f7a5f6c5 | 285 | EXPORT_SYMBOL(nfc_hci_target_discovered); |
8b8d2e08 EL |
286 | |
287 | void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event, | |
288 | struct sk_buff *skb) | |
289 | { | |
290 | int r = 0; | |
74a5b966 EL |
291 | u8 gate = nfc_hci_pipe2gate(hdev, pipe); |
292 | ||
293 | if (gate == 0xff) { | |
294 | pr_err("Discarded event %x to unopened pipe %x\n", event, pipe); | |
295 | goto exit; | |
296 | } | |
8b8d2e08 | 297 | |
40d06d36 EL |
298 | if (hdev->ops->event_received) { |
299 | r = hdev->ops->event_received(hdev, gate, event, skb); | |
300 | if (r <= 0) | |
301 | goto exit_noskb; | |
302 | } | |
303 | ||
8b8d2e08 EL |
304 | switch (event) { |
305 | case NFC_HCI_EVT_TARGET_DISCOVERED: | |
8b8d2e08 EL |
306 | if (skb->len < 1) { /* no status data? */ |
307 | r = -EPROTO; | |
308 | goto exit; | |
309 | } | |
310 | ||
311 | if (skb->data[0] == 3) { | |
312 | /* TODO: Multiple targets in field, none activated | |
313 | * poll is supposedly stopped, but there is no | |
314 | * single target to activate, so nothing to report | |
315 | * up. | |
316 | * if we need to restart poll, we must save the | |
317 | * protocols from the initial poll and reuse here. | |
318 | */ | |
319 | } | |
320 | ||
321 | if (skb->data[0] != 0) { | |
322 | r = -EPROTO; | |
323 | goto exit; | |
324 | } | |
325 | ||
74a5b966 | 326 | r = nfc_hci_target_discovered(hdev, gate); |
8b8d2e08 EL |
327 | break; |
328 | default: | |
40d06d36 EL |
329 | pr_info("Discarded unknown event %x to gate %x\n", event, gate); |
330 | r = -EINVAL; | |
8b8d2e08 EL |
331 | break; |
332 | } | |
333 | ||
334 | exit: | |
335 | kfree_skb(skb); | |
336 | ||
27c31191 | 337 | exit_noskb: |
249eb5bd SO |
338 | if (r) |
339 | nfc_hci_driver_failure(hdev, r); | |
8b8d2e08 EL |
340 | } |
341 | ||
342 | static void nfc_hci_cmd_timeout(unsigned long data) | |
343 | { | |
344 | struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data; | |
345 | ||
916082b0 | 346 | schedule_work(&hdev->msg_tx_work); |
8b8d2e08 EL |
347 | } |
348 | ||
349 | static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count, | |
a10d595b | 350 | struct nfc_hci_gate *gates) |
8b8d2e08 EL |
351 | { |
352 | int r; | |
8b8d2e08 | 353 | while (gate_count--) { |
a10d595b EL |
354 | r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, |
355 | gates->gate, gates->pipe); | |
8b8d2e08 EL |
356 | if (r < 0) |
357 | return r; | |
a10d595b | 358 | gates++; |
8b8d2e08 EL |
359 | } |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int hci_dev_session_init(struct nfc_hci_dev *hdev) | |
365 | { | |
366 | struct sk_buff *skb = NULL; | |
367 | int r; | |
a10d595b EL |
368 | |
369 | if (hdev->init_data.gates[0].gate != NFC_HCI_ADMIN_GATE) | |
370 | return -EPROTO; | |
8b8d2e08 EL |
371 | |
372 | r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, | |
a10d595b EL |
373 | hdev->init_data.gates[0].gate, |
374 | hdev->init_data.gates[0].pipe); | |
8b8d2e08 EL |
375 | if (r < 0) |
376 | goto exit; | |
377 | ||
378 | r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE, | |
379 | NFC_HCI_ADMIN_SESSION_IDENTITY, &skb); | |
380 | if (r < 0) | |
381 | goto disconnect_all; | |
382 | ||
383 | if (skb->len && skb->len == strlen(hdev->init_data.session_id)) | |
384 | if (memcmp(hdev->init_data.session_id, skb->data, | |
385 | skb->len) == 0) { | |
386 | /* TODO ELa: restore gate<->pipe table from | |
387 | * some TBD location. | |
388 | * note: it doesn't seem possible to get the chip | |
389 | * currently open gate/pipe table. | |
390 | * It is only possible to obtain the supported | |
391 | * gate list. | |
392 | */ | |
393 | ||
394 | /* goto exit | |
395 | * For now, always do a full initialization */ | |
396 | } | |
397 | ||
398 | r = nfc_hci_disconnect_all_gates(hdev); | |
399 | if (r < 0) | |
400 | goto exit; | |
401 | ||
8b8d2e08 EL |
402 | r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count, |
403 | hdev->init_data.gates); | |
404 | if (r < 0) | |
405 | goto disconnect_all; | |
406 | ||
407 | r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, | |
408 | NFC_HCI_ADMIN_SESSION_IDENTITY, | |
409 | hdev->init_data.session_id, | |
410 | strlen(hdev->init_data.session_id)); | |
411 | if (r == 0) | |
412 | goto exit; | |
413 | ||
414 | disconnect_all: | |
415 | nfc_hci_disconnect_all_gates(hdev); | |
416 | ||
417 | exit: | |
33e59713 | 418 | kfree_skb(skb); |
8b8d2e08 EL |
419 | |
420 | return r; | |
421 | } | |
422 | ||
423 | static int hci_dev_version(struct nfc_hci_dev *hdev) | |
424 | { | |
425 | int r; | |
426 | struct sk_buff *skb; | |
427 | ||
428 | r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, | |
429 | NFC_HCI_ID_MGMT_VERSION_SW, &skb); | |
23f7e6d0 EL |
430 | if (r == -EOPNOTSUPP) { |
431 | pr_info("Software/Hardware info not available\n"); | |
432 | return 0; | |
433 | } | |
8b8d2e08 EL |
434 | if (r < 0) |
435 | return r; | |
436 | ||
437 | if (skb->len != 3) { | |
438 | kfree_skb(skb); | |
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4; | |
443 | hdev->sw_patch = skb->data[0] & 0x0f; | |
444 | hdev->sw_flashlib_major = skb->data[1]; | |
445 | hdev->sw_flashlib_minor = skb->data[2]; | |
446 | ||
447 | kfree_skb(skb); | |
448 | ||
449 | r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, | |
450 | NFC_HCI_ID_MGMT_VERSION_HW, &skb); | |
451 | if (r < 0) | |
452 | return r; | |
453 | ||
454 | if (skb->len != 3) { | |
455 | kfree_skb(skb); | |
456 | return -EINVAL; | |
457 | } | |
458 | ||
459 | hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5; | |
460 | hdev->hw_version = skb->data[0] & 0x1f; | |
461 | hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6; | |
462 | hdev->hw_software = skb->data[1] & 0x3f; | |
463 | hdev->hw_bsid = skb->data[2]; | |
464 | ||
465 | kfree_skb(skb); | |
466 | ||
467 | pr_info("SOFTWARE INFO:\n"); | |
468 | pr_info("RomLib : %d\n", hdev->sw_romlib); | |
469 | pr_info("Patch : %d\n", hdev->sw_patch); | |
470 | pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major); | |
471 | pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor); | |
472 | pr_info("HARDWARE INFO:\n"); | |
473 | pr_info("Derivative : %d\n", hdev->hw_derivative); | |
474 | pr_info("HW Version : %d\n", hdev->hw_version); | |
475 | pr_info("#MPW : %d\n", hdev->hw_mpw); | |
476 | pr_info("Software : %d\n", hdev->hw_software); | |
477 | pr_info("BSID Version : %d\n", hdev->hw_bsid); | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | static int hci_dev_up(struct nfc_dev *nfc_dev) | |
483 | { | |
484 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
485 | int r = 0; | |
486 | ||
487 | if (hdev->ops->open) { | |
488 | r = hdev->ops->open(hdev); | |
489 | if (r < 0) | |
490 | return r; | |
491 | } | |
492 | ||
412fda53 EL |
493 | r = nfc_llc_start(hdev->llc); |
494 | if (r < 0) | |
495 | goto exit_close; | |
496 | ||
8b8d2e08 EL |
497 | r = hci_dev_session_init(hdev); |
498 | if (r < 0) | |
412fda53 | 499 | goto exit_llc; |
8b8d2e08 EL |
500 | |
501 | r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, | |
502 | NFC_HCI_EVT_END_OPERATION, NULL, 0); | |
503 | if (r < 0) | |
412fda53 | 504 | goto exit_llc; |
8b8d2e08 EL |
505 | |
506 | if (hdev->ops->hci_ready) { | |
507 | r = hdev->ops->hci_ready(hdev); | |
508 | if (r < 0) | |
412fda53 | 509 | goto exit_llc; |
8b8d2e08 EL |
510 | } |
511 | ||
512 | r = hci_dev_version(hdev); | |
513 | if (r < 0) | |
412fda53 EL |
514 | goto exit_llc; |
515 | ||
516 | return 0; | |
517 | ||
518 | exit_llc: | |
519 | nfc_llc_stop(hdev->llc); | |
520 | ||
521 | exit_close: | |
522 | if (hdev->ops->close) | |
523 | hdev->ops->close(hdev); | |
8b8d2e08 | 524 | |
8b8d2e08 EL |
525 | return r; |
526 | } | |
527 | ||
528 | static int hci_dev_down(struct nfc_dev *nfc_dev) | |
529 | { | |
530 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
531 | ||
412fda53 EL |
532 | nfc_llc_stop(hdev->llc); |
533 | ||
8b8d2e08 EL |
534 | if (hdev->ops->close) |
535 | hdev->ops->close(hdev); | |
536 | ||
537 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
fe7c5800 SO |
542 | static int hci_start_poll(struct nfc_dev *nfc_dev, |
543 | u32 im_protocols, u32 tm_protocols) | |
8b8d2e08 EL |
544 | { |
545 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
8b8d2e08 EL |
546 | |
547 | if (hdev->ops->start_poll) | |
fe7c5800 | 548 | return hdev->ops->start_poll(hdev, im_protocols, tm_protocols); |
8b8d2e08 | 549 | else |
03bed29e | 550 | return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
0f450772 SJ |
551 | NFC_HCI_EVT_READER_REQUESTED, |
552 | NULL, 0); | |
8b8d2e08 EL |
553 | } |
554 | ||
555 | static void hci_stop_poll(struct nfc_dev *nfc_dev) | |
556 | { | |
557 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
558 | ||
03bed29e EL |
559 | nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
560 | NFC_HCI_EVT_END_OPERATION, NULL, 0); | |
8b8d2e08 EL |
561 | } |
562 | ||
c40d1740 AW |
563 | static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
564 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
565 | { | |
566 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
567 | ||
a395298c SO |
568 | if (!hdev->ops->dep_link_up) |
569 | return 0; | |
c40d1740 | 570 | |
a395298c SO |
571 | return hdev->ops->dep_link_up(hdev, target, comm_mode, |
572 | gb, gb_len); | |
c40d1740 AW |
573 | } |
574 | ||
575 | static int hci_dep_link_down(struct nfc_dev *nfc_dev) | |
576 | { | |
577 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
578 | ||
a395298c SO |
579 | if (!hdev->ops->dep_link_down) |
580 | return 0; | |
c40d1740 | 581 | |
a395298c | 582 | return hdev->ops->dep_link_down(hdev); |
c40d1740 AW |
583 | } |
584 | ||
90099433 EL |
585 | static int hci_activate_target(struct nfc_dev *nfc_dev, |
586 | struct nfc_target *target, u32 protocol) | |
8b8d2e08 | 587 | { |
8b8d2e08 EL |
588 | return 0; |
589 | } | |
590 | ||
90099433 EL |
591 | static void hci_deactivate_target(struct nfc_dev *nfc_dev, |
592 | struct nfc_target *target) | |
8b8d2e08 EL |
593 | { |
594 | } | |
595 | ||
f3e8fb55 EL |
596 | #define HCI_CB_TYPE_TRANSCEIVE 1 |
597 | ||
598 | static void hci_transceive_cb(void *context, struct sk_buff *skb, int err) | |
599 | { | |
600 | struct nfc_hci_dev *hdev = context; | |
601 | ||
602 | switch (hdev->async_cb_type) { | |
603 | case HCI_CB_TYPE_TRANSCEIVE: | |
604 | /* | |
605 | * TODO: Check RF Error indicator to make sure data is valid. | |
606 | * It seems that HCI cmd can complete without error, but data | |
607 | * can be invalid if an RF error occured? Ignore for now. | |
608 | */ | |
609 | if (err == 0) | |
610 | skb_trim(skb, skb->len - 1); /* RF Err ind */ | |
611 | ||
612 | hdev->async_cb(hdev->async_cb_context, skb, err); | |
613 | break; | |
614 | default: | |
615 | if (err == 0) | |
616 | kfree_skb(skb); | |
617 | break; | |
618 | } | |
619 | } | |
620 | ||
be9ae4ce SO |
621 | static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, |
622 | struct sk_buff *skb, data_exchange_cb_t cb, | |
623 | void *cb_context) | |
8b8d2e08 EL |
624 | { |
625 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
626 | int r; | |
8b8d2e08 | 627 | |
90099433 | 628 | pr_debug("target_idx=%d\n", target->idx); |
8b8d2e08 EL |
629 | |
630 | switch (target->hci_reader_gate) { | |
631 | case NFC_HCI_RF_READER_A_GATE: | |
632 | case NFC_HCI_RF_READER_B_GATE: | |
e8107623 AW |
633 | if (hdev->ops->im_transceive) { |
634 | r = hdev->ops->im_transceive(hdev, target, skb, cb, | |
f3e8fb55 | 635 | cb_context); |
8b8d2e08 EL |
636 | if (r <= 0) /* handled */ |
637 | break; | |
638 | } | |
639 | ||
640 | *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */ | |
f3e8fb55 EL |
641 | |
642 | hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE; | |
643 | hdev->async_cb = cb; | |
644 | hdev->async_cb_context = cb_context; | |
645 | ||
646 | r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, | |
647 | NFC_HCI_WR_XCHG_DATA, skb->data, | |
648 | skb->len, hci_transceive_cb, hdev); | |
8b8d2e08 EL |
649 | break; |
650 | default: | |
e8107623 AW |
651 | if (hdev->ops->im_transceive) { |
652 | r = hdev->ops->im_transceive(hdev, target, skb, cb, | |
f3e8fb55 | 653 | cb_context); |
8b8d2e08 EL |
654 | if (r == 1) |
655 | r = -ENOTSUPP; | |
0f450772 | 656 | } else { |
8b8d2e08 | 657 | r = -ENOTSUPP; |
0f450772 | 658 | } |
f3e8fb55 | 659 | break; |
8b8d2e08 EL |
660 | } |
661 | ||
662 | kfree_skb(skb); | |
663 | ||
f3e8fb55 | 664 | return r; |
8b8d2e08 EL |
665 | } |
666 | ||
984d334f | 667 | static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
e8107623 AW |
668 | { |
669 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
670 | ||
a395298c SO |
671 | if (!hdev->ops->tm_send) { |
672 | kfree_skb(skb); | |
673 | return -ENOTSUPP; | |
674 | } | |
924d4a02 | 675 | |
a395298c | 676 | return hdev->ops->tm_send(hdev, skb); |
e8107623 AW |
677 | } |
678 | ||
1676f751 EL |
679 | static int hci_check_presence(struct nfc_dev *nfc_dev, |
680 | struct nfc_target *target) | |
681 | { | |
682 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
683 | ||
a395298c SO |
684 | if (!hdev->ops->check_presence) |
685 | return 0; | |
1676f751 | 686 | |
a395298c | 687 | return hdev->ops->check_presence(hdev, target); |
1676f751 EL |
688 | } |
689 | ||
0a946301 SO |
690 | static int hci_discover_se(struct nfc_dev *nfc_dev) |
691 | { | |
692 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
693 | ||
694 | if (hdev->ops->discover_se) | |
695 | return hdev->ops->discover_se(hdev); | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static int hci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx) | |
701 | { | |
702 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
703 | ||
704 | if (hdev->ops->enable_se) | |
705 | return hdev->ops->enable_se(hdev, se_idx); | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | static int hci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx) | |
711 | { | |
712 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
713 | ||
714 | if (hdev->ops->disable_se) | |
4eba11e8 | 715 | return hdev->ops->disable_se(hdev, se_idx); |
0a946301 SO |
716 | |
717 | return 0; | |
718 | } | |
719 | ||
412fda53 EL |
720 | static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err) |
721 | { | |
722 | mutex_lock(&hdev->msg_tx_mutex); | |
723 | ||
724 | if (hdev->cmd_pending_msg == NULL) { | |
725 | nfc_driver_failure(hdev->ndev, err); | |
726 | goto exit; | |
727 | } | |
728 | ||
729 | __nfc_hci_cmd_completion(hdev, err, NULL); | |
730 | ||
731 | exit: | |
732 | mutex_unlock(&hdev->msg_tx_mutex); | |
733 | } | |
734 | ||
735 | static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err) | |
736 | { | |
737 | nfc_hci_failure(hdev, err); | |
738 | } | |
739 | ||
740 | static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb) | |
741 | { | |
742 | struct hcp_packet *packet; | |
743 | u8 type; | |
744 | u8 instruction; | |
745 | struct sk_buff *hcp_skb; | |
746 | u8 pipe; | |
747 | struct sk_buff *frag_skb; | |
748 | int msg_len; | |
749 | ||
750 | packet = (struct hcp_packet *)skb->data; | |
751 | if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) { | |
752 | skb_queue_tail(&hdev->rx_hcp_frags, skb); | |
753 | return; | |
754 | } | |
755 | ||
756 | /* it's the last fragment. Does it need re-aggregation? */ | |
757 | if (skb_queue_len(&hdev->rx_hcp_frags)) { | |
758 | pipe = packet->header & NFC_HCI_FRAGMENT; | |
759 | skb_queue_tail(&hdev->rx_hcp_frags, skb); | |
760 | ||
761 | msg_len = 0; | |
762 | skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { | |
763 | msg_len += (frag_skb->len - | |
764 | NFC_HCI_HCP_PACKET_HEADER_LEN); | |
765 | } | |
766 | ||
767 | hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN + | |
768 | msg_len, GFP_KERNEL); | |
769 | if (hcp_skb == NULL) { | |
770 | nfc_hci_failure(hdev, -ENOMEM); | |
771 | return; | |
772 | } | |
773 | ||
774 | *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe; | |
775 | ||
776 | skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { | |
777 | msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN; | |
778 | memcpy(skb_put(hcp_skb, msg_len), | |
779 | frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN, | |
780 | msg_len); | |
781 | } | |
782 | ||
783 | skb_queue_purge(&hdev->rx_hcp_frags); | |
784 | } else { | |
785 | packet->header &= NFC_HCI_FRAGMENT; | |
786 | hcp_skb = skb; | |
787 | } | |
788 | ||
789 | /* if this is a response, dispatch immediately to | |
790 | * unblock waiting cmd context. Otherwise, enqueue to dispatch | |
791 | * in separate context where handler can also execute command. | |
792 | */ | |
793 | packet = (struct hcp_packet *)hcp_skb->data; | |
794 | type = HCP_MSG_GET_TYPE(packet->message.header); | |
795 | if (type == NFC_HCI_HCP_RESPONSE) { | |
796 | pipe = packet->header; | |
797 | instruction = HCP_MSG_GET_CMD(packet->message.header); | |
798 | skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN + | |
799 | NFC_HCI_HCP_MESSAGE_HEADER_LEN); | |
800 | nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb); | |
801 | } else { | |
802 | skb_queue_tail(&hdev->msg_rx_queue, hcp_skb); | |
916082b0 | 803 | schedule_work(&hdev->msg_rx_work); |
412fda53 EL |
804 | } |
805 | } | |
806 | ||
9ea7187c | 807 | static int hci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name) |
9a695d23 EL |
808 | { |
809 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); | |
810 | ||
9ea7187c | 811 | if (!hdev->ops->fw_download) |
a395298c | 812 | return -ENOTSUPP; |
9a695d23 | 813 | |
9ea7187c | 814 | return hdev->ops->fw_download(hdev, firmware_name); |
9a695d23 EL |
815 | } |
816 | ||
bd007bea | 817 | static struct nfc_ops hci_nfc_ops = { |
8b8d2e08 EL |
818 | .dev_up = hci_dev_up, |
819 | .dev_down = hci_dev_down, | |
820 | .start_poll = hci_start_poll, | |
821 | .stop_poll = hci_stop_poll, | |
c40d1740 AW |
822 | .dep_link_up = hci_dep_link_up, |
823 | .dep_link_down = hci_dep_link_down, | |
8b8d2e08 EL |
824 | .activate_target = hci_activate_target, |
825 | .deactivate_target = hci_deactivate_target, | |
be9ae4ce | 826 | .im_transceive = hci_transceive, |
e8107623 | 827 | .tm_send = hci_tm_send, |
1676f751 | 828 | .check_presence = hci_check_presence, |
9ea7187c | 829 | .fw_download = hci_fw_download, |
0a946301 SO |
830 | .discover_se = hci_discover_se, |
831 | .enable_se = hci_enable_se, | |
832 | .disable_se = hci_disable_se, | |
8b8d2e08 EL |
833 | }; |
834 | ||
835 | struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, | |
836 | struct nfc_hci_init_data *init_data, | |
bf71ab8b | 837 | unsigned long quirks, |
8b8d2e08 | 838 | u32 protocols, |
412fda53 | 839 | const char *llc_name, |
8b8d2e08 EL |
840 | int tx_headroom, |
841 | int tx_tailroom, | |
842 | int max_link_payload) | |
843 | { | |
844 | struct nfc_hci_dev *hdev; | |
845 | ||
846 | if (ops->xmit == NULL) | |
847 | return NULL; | |
848 | ||
849 | if (protocols == 0) | |
850 | return NULL; | |
851 | ||
852 | hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL); | |
853 | if (hdev == NULL) | |
854 | return NULL; | |
855 | ||
412fda53 EL |
856 | hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit, |
857 | nfc_hci_recv_from_llc, tx_headroom, | |
858 | tx_tailroom, nfc_hci_llc_failure); | |
859 | if (hdev->llc == NULL) { | |
860 | kfree(hdev); | |
861 | return NULL; | |
862 | } | |
863 | ||
0b456c41 | 864 | hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, |
8b8d2e08 EL |
865 | tx_headroom + HCI_CMDS_HEADROOM, |
866 | tx_tailroom); | |
867 | if (!hdev->ndev) { | |
412fda53 | 868 | nfc_llc_free(hdev->llc); |
8b8d2e08 EL |
869 | kfree(hdev); |
870 | return NULL; | |
871 | } | |
872 | ||
873 | hdev->ops = ops; | |
874 | hdev->max_data_link_payload = max_link_payload; | |
875 | hdev->init_data = *init_data; | |
876 | ||
877 | nfc_set_drvdata(hdev->ndev, hdev); | |
878 | ||
879 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); | |
880 | ||
bf71ab8b EL |
881 | hdev->quirks = quirks; |
882 | ||
8b8d2e08 EL |
883 | return hdev; |
884 | } | |
885 | EXPORT_SYMBOL(nfc_hci_allocate_device); | |
886 | ||
887 | void nfc_hci_free_device(struct nfc_hci_dev *hdev) | |
888 | { | |
889 | nfc_free_device(hdev->ndev); | |
412fda53 | 890 | nfc_llc_free(hdev->llc); |
8b8d2e08 EL |
891 | kfree(hdev); |
892 | } | |
893 | EXPORT_SYMBOL(nfc_hci_free_device); | |
894 | ||
895 | int nfc_hci_register_device(struct nfc_hci_dev *hdev) | |
896 | { | |
8b8d2e08 EL |
897 | mutex_init(&hdev->msg_tx_mutex); |
898 | ||
899 | INIT_LIST_HEAD(&hdev->msg_tx_queue); | |
900 | ||
901 | INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work); | |
8b8d2e08 EL |
902 | |
903 | init_timer(&hdev->cmd_timer); | |
904 | hdev->cmd_timer.data = (unsigned long)hdev; | |
905 | hdev->cmd_timer.function = nfc_hci_cmd_timeout; | |
906 | ||
907 | skb_queue_head_init(&hdev->rx_hcp_frags); | |
908 | ||
909 | INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work); | |
8b8d2e08 EL |
910 | |
911 | skb_queue_head_init(&hdev->msg_rx_queue); | |
912 | ||
474fee3d | 913 | return nfc_register_device(hdev->ndev); |
8b8d2e08 EL |
914 | } |
915 | EXPORT_SYMBOL(nfc_hci_register_device); | |
916 | ||
917 | void nfc_hci_unregister_device(struct nfc_hci_dev *hdev) | |
918 | { | |
1913e57c | 919 | struct hci_msg *msg, *n; |
8b8d2e08 | 920 | |
f0c91038 EL |
921 | mutex_lock(&hdev->msg_tx_mutex); |
922 | ||
923 | if (hdev->cmd_pending_msg) { | |
924 | if (hdev->cmd_pending_msg->cb) | |
925 | hdev->cmd_pending_msg->cb( | |
926 | hdev->cmd_pending_msg->cb_context, | |
927 | NULL, -ESHUTDOWN); | |
928 | kfree(hdev->cmd_pending_msg); | |
929 | hdev->cmd_pending_msg = NULL; | |
930 | } | |
931 | ||
932 | hdev->shutting_down = true; | |
933 | ||
934 | mutex_unlock(&hdev->msg_tx_mutex); | |
935 | ||
936 | del_timer_sync(&hdev->cmd_timer); | |
937 | cancel_work_sync(&hdev->msg_tx_work); | |
938 | ||
939 | cancel_work_sync(&hdev->msg_rx_work); | |
940 | ||
941 | nfc_unregister_device(hdev->ndev); | |
942 | ||
8b8d2e08 EL |
943 | skb_queue_purge(&hdev->rx_hcp_frags); |
944 | skb_queue_purge(&hdev->msg_rx_queue); | |
945 | ||
1913e57c | 946 | list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) { |
8b8d2e08 EL |
947 | list_del(&msg->msg_l); |
948 | skb_queue_purge(&msg->msg_frags); | |
949 | kfree(msg); | |
950 | } | |
8b8d2e08 EL |
951 | } |
952 | EXPORT_SYMBOL(nfc_hci_unregister_device); | |
953 | ||
954 | void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata) | |
955 | { | |
956 | hdev->clientdata = clientdata; | |
957 | } | |
958 | EXPORT_SYMBOL(nfc_hci_set_clientdata); | |
959 | ||
960 | void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev) | |
961 | { | |
962 | return hdev->clientdata; | |
963 | } | |
964 | EXPORT_SYMBOL(nfc_hci_get_clientdata); | |
965 | ||
72b06f75 EL |
966 | void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err) |
967 | { | |
968 | nfc_hci_failure(hdev, err); | |
969 | } | |
a9a741a7 EL |
970 | EXPORT_SYMBOL(nfc_hci_driver_failure); |
971 | ||
0f450772 | 972 | void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb) |
8b8d2e08 | 973 | { |
412fda53 | 974 | nfc_llc_rcv_from_drv(hdev->llc, skb); |
8b8d2e08 EL |
975 | } |
976 | EXPORT_SYMBOL(nfc_hci_recv_frame); | |
977 | ||
67cccfe1 EL |
978 | static int __init nfc_hci_init(void) |
979 | { | |
980 | return nfc_llc_init(); | |
981 | } | |
982 | ||
983 | static void __exit nfc_hci_exit(void) | |
984 | { | |
985 | nfc_llc_exit(); | |
986 | } | |
987 | ||
412fda53 | 988 | subsys_initcall(nfc_hci_init); |
67cccfe1 EL |
989 | module_exit(nfc_hci_exit); |
990 | ||
8b8d2e08 | 991 | MODULE_LICENSE("GPL"); |
80faa598 | 992 | MODULE_DESCRIPTION("NFC HCI Core"); |