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1892bf84 CR |
1 | /* |
2 | * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | ||
17 | #include <net/nfc/hci.h> | |
18 | ||
19 | #include "st21nfca.h" | |
1892bf84 CR |
20 | |
21 | #define ST21NFCA_NFCIP1_INITIATOR 0x00 | |
22 | #define ST21NFCA_NFCIP1_REQ 0xd4 | |
23 | #define ST21NFCA_NFCIP1_RES 0xd5 | |
24 | #define ST21NFCA_NFCIP1_ATR_REQ 0x00 | |
25 | #define ST21NFCA_NFCIP1_ATR_RES 0x01 | |
26 | #define ST21NFCA_NFCIP1_PSL_REQ 0x04 | |
27 | #define ST21NFCA_NFCIP1_PSL_RES 0x05 | |
28 | #define ST21NFCA_NFCIP1_DEP_REQ 0x06 | |
29 | #define ST21NFCA_NFCIP1_DEP_RES 0x07 | |
30 | ||
31 | #define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) | |
32 | #define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) | |
33 | #define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ | |
34 | ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) | |
35 | #define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04) | |
36 | #define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) | |
37 | #define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10 | |
38 | ||
39 | #define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ | |
40 | ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) | |
41 | ||
42 | #define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00 | |
43 | #define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40 | |
44 | #define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 | |
45 | ||
46 | #define ST21NFCA_ATR_REQ_MIN_SIZE 17 | |
47 | #define ST21NFCA_ATR_REQ_MAX_SIZE 65 | |
48 | #define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30 | |
49 | #define ST21NFCA_GB_BIT 0x02 | |
50 | ||
a4415e76 CR |
51 | #define ST21NFCA_EVT_SEND_DATA 0x10 |
52 | #define ST21NFCA_EVT_FIELD_ON 0x11 | |
53 | #define ST21NFCA_EVT_CARD_DEACTIVATED 0x12 | |
54 | #define ST21NFCA_EVT_CARD_ACTIVATED 0x13 | |
55 | #define ST21NFCA_EVT_FIELD_OFF 0x14 | |
56 | ||
1892bf84 CR |
57 | #define ST21NFCA_EVT_CARD_F_BITRATE 0x16 |
58 | #define ST21NFCA_EVT_READER_F_BITRATE 0x13 | |
59 | #define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38) | |
60 | #define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07) | |
61 | #define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4) | |
62 | #define ST21NFCA_CARD_BITRATE_212 0x01 | |
63 | #define ST21NFCA_CARD_BITRATE_424 0x02 | |
64 | ||
65 | #define ST21NFCA_DEFAULT_TIMEOUT 0x0a | |
66 | ||
67 | ||
68 | #define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \ | |
69 | __LINE__, req) | |
70 | ||
71 | struct st21nfca_atr_req { | |
72 | u8 length; | |
73 | u8 cmd0; | |
74 | u8 cmd1; | |
75 | u8 nfcid3[NFC_NFCID3_MAXSIZE]; | |
76 | u8 did; | |
77 | u8 bsi; | |
78 | u8 bri; | |
79 | u8 ppi; | |
80 | u8 gbi[0]; | |
81 | } __packed; | |
82 | ||
83 | struct st21nfca_atr_res { | |
84 | u8 length; | |
85 | u8 cmd0; | |
86 | u8 cmd1; | |
87 | u8 nfcid3[NFC_NFCID3_MAXSIZE]; | |
88 | u8 did; | |
89 | u8 bsi; | |
90 | u8 bri; | |
91 | u8 to; | |
92 | u8 ppi; | |
93 | u8 gbi[0]; | |
94 | } __packed; | |
95 | ||
96 | struct st21nfca_psl_req { | |
97 | u8 length; | |
98 | u8 cmd0; | |
99 | u8 cmd1; | |
100 | u8 did; | |
101 | u8 brs; | |
102 | u8 fsl; | |
103 | } __packed; | |
104 | ||
105 | struct st21nfca_psl_res { | |
106 | u8 length; | |
107 | u8 cmd0; | |
108 | u8 cmd1; | |
109 | u8 did; | |
110 | } __packed; | |
111 | ||
112 | struct st21nfca_dep_req_res { | |
113 | u8 length; | |
114 | u8 cmd0; | |
115 | u8 cmd1; | |
116 | u8 pfb; | |
117 | u8 did; | |
118 | u8 nad; | |
119 | } __packed; | |
120 | ||
121 | static void st21nfca_tx_work(struct work_struct *work) | |
122 | { | |
123 | struct st21nfca_hci_info *info = container_of(work, | |
124 | struct st21nfca_hci_info, | |
125 | dep_info.tx_work); | |
126 | ||
127 | struct nfc_dev *dev; | |
128 | struct sk_buff *skb; | |
3e6df919 | 129 | |
1892bf84 CR |
130 | if (info) { |
131 | dev = info->hdev->ndev; | |
132 | skb = info->dep_info.tx_pending; | |
133 | ||
134 | device_lock(&dev->dev); | |
135 | ||
136 | nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE, | |
cc3faac9 CR |
137 | ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, |
138 | info->async_cb, info); | |
1892bf84 CR |
139 | device_unlock(&dev->dev); |
140 | kfree_skb(skb); | |
141 | } | |
142 | } | |
143 | ||
144 | static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info, | |
145 | struct sk_buff *skb) | |
146 | { | |
147 | info->dep_info.tx_pending = skb; | |
148 | schedule_work(&info->dep_info.tx_work); | |
149 | } | |
150 | ||
151 | static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev, | |
152 | struct st21nfca_atr_req *atr_req) | |
153 | { | |
154 | struct st21nfca_atr_res *atr_res; | |
155 | struct sk_buff *skb; | |
156 | size_t gb_len; | |
157 | int r; | |
158 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
159 | ||
160 | gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); | |
161 | skb = alloc_skb(atr_req->length + 1, GFP_KERNEL); | |
162 | if (!skb) | |
163 | return -ENOMEM; | |
164 | ||
165 | skb_put(skb, sizeof(struct st21nfca_atr_res)); | |
166 | ||
167 | atr_res = (struct st21nfca_atr_res *)skb->data; | |
168 | memset(atr_res, 0, sizeof(struct st21nfca_atr_res)); | |
169 | ||
170 | atr_res->length = atr_req->length + 1; | |
171 | atr_res->cmd0 = ST21NFCA_NFCIP1_RES; | |
172 | atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES; | |
173 | ||
174 | memcpy(atr_res->nfcid3, atr_req->nfcid3, 6); | |
175 | atr_res->bsi = 0x00; | |
176 | atr_res->bri = 0x00; | |
177 | atr_res->to = ST21NFCA_DEFAULT_TIMEOUT; | |
178 | atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; | |
179 | ||
180 | if (gb_len) { | |
181 | skb_put(skb, gb_len); | |
182 | ||
183 | atr_res->ppi |= ST21NFCA_GB_BIT; | |
184 | memcpy(atr_res->gbi, atr_req->gbi, gb_len); | |
185 | r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi, | |
186 | gb_len); | |
187 | if (r < 0) | |
188 | return r; | |
189 | } | |
190 | ||
191 | info->dep_info.curr_nfc_dep_pni = 0; | |
192 | ||
ecc6522b | 193 | r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, |
1892bf84 | 194 | ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); |
ecc6522b CR |
195 | kfree_skb(skb); |
196 | return r; | |
1892bf84 CR |
197 | } |
198 | ||
199 | static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev, | |
200 | struct sk_buff *skb) | |
201 | { | |
202 | struct st21nfca_atr_req *atr_req; | |
203 | size_t gb_len; | |
204 | int r; | |
205 | ||
206 | skb_trim(skb, skb->len - 1); | |
1892bf84 CR |
207 | |
208 | if (!skb->len) { | |
209 | r = -EIO; | |
210 | goto exit; | |
211 | } | |
212 | ||
213 | if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) { | |
214 | r = -EPROTO; | |
215 | goto exit; | |
216 | } | |
217 | ||
218 | atr_req = (struct st21nfca_atr_req *)skb->data; | |
219 | ||
56f1ffcc CR |
220 | if (atr_req->length < sizeof(struct st21nfca_atr_req)) { |
221 | r = -EPROTO; | |
222 | goto exit; | |
223 | } | |
224 | ||
1892bf84 CR |
225 | r = st21nfca_tm_send_atr_res(hdev, atr_req); |
226 | if (r) | |
227 | goto exit; | |
228 | ||
229 | gb_len = skb->len - sizeof(struct st21nfca_atr_req); | |
230 | ||
231 | r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, | |
232 | NFC_COMM_PASSIVE, atr_req->gbi, gb_len); | |
233 | if (r) | |
234 | goto exit; | |
235 | ||
236 | r = 0; | |
237 | ||
238 | exit: | |
239 | return r; | |
240 | } | |
241 | ||
242 | static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, | |
243 | struct st21nfca_psl_req *psl_req) | |
244 | { | |
245 | struct st21nfca_psl_res *psl_res; | |
246 | struct sk_buff *skb; | |
247 | u8 bitrate[2] = {0, 0}; | |
1892bf84 CR |
248 | int r; |
249 | ||
250 | skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); | |
251 | if (!skb) | |
252 | return -ENOMEM; | |
253 | skb_put(skb, sizeof(struct st21nfca_psl_res)); | |
254 | ||
255 | psl_res = (struct st21nfca_psl_res *)skb->data; | |
256 | ||
257 | psl_res->length = sizeof(struct st21nfca_psl_res); | |
258 | psl_res->cmd0 = ST21NFCA_NFCIP1_RES; | |
259 | psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; | |
260 | psl_res->did = psl_req->did; | |
261 | ||
262 | r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, | |
263 | ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); | |
ecc6522b CR |
264 | if (r < 0) |
265 | goto error; | |
1892bf84 CR |
266 | |
267 | /* | |
268 | * ST21NFCA only support P2P passive. | |
269 | * PSL_REQ BRS value != 0 has only a meaning to | |
270 | * change technology to type F. | |
271 | * We change to BITRATE 424Kbits. | |
272 | * In other case switch to BITRATE 106Kbits. | |
273 | */ | |
274 | if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && | |
275 | ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { | |
276 | bitrate[0] = ST21NFCA_CARD_BITRATE_424; | |
277 | bitrate[1] = ST21NFCA_CARD_BITRATE_424; | |
278 | } | |
279 | ||
280 | /* Send an event to change bitrate change event to card f */ | |
ecc6522b | 281 | r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, |
1892bf84 | 282 | ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); |
ecc6522b CR |
283 | error: |
284 | kfree_skb(skb); | |
285 | return r; | |
1892bf84 CR |
286 | } |
287 | ||
288 | static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, | |
289 | struct sk_buff *skb) | |
290 | { | |
291 | struct st21nfca_psl_req *psl_req; | |
292 | int r; | |
293 | ||
294 | skb_trim(skb, skb->len - 1); | |
1892bf84 CR |
295 | |
296 | if (!skb->len) { | |
297 | r = -EIO; | |
298 | goto exit; | |
299 | } | |
300 | ||
301 | psl_req = (struct st21nfca_psl_req *)skb->data; | |
302 | ||
303 | if (skb->len < sizeof(struct st21nfca_psl_req)) { | |
304 | r = -EIO; | |
305 | goto exit; | |
306 | } | |
307 | ||
308 | r = st21nfca_tm_send_psl_res(hdev, psl_req); | |
309 | exit: | |
310 | return r; | |
311 | } | |
312 | ||
313 | int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) | |
314 | { | |
315 | int r; | |
316 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
317 | ||
d58ff351 JB |
318 | *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; |
319 | *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; | |
320 | *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; | |
321 | *(u8 *)skb_push(skb, 1) = skb->len; | |
1892bf84 CR |
322 | |
323 | r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, | |
cc3faac9 | 324 | ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); |
1892bf84 CR |
325 | kfree_skb(skb); |
326 | ||
327 | return r; | |
328 | } | |
329 | EXPORT_SYMBOL(st21nfca_tm_send_dep_res); | |
330 | ||
331 | static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, | |
332 | struct sk_buff *skb) | |
333 | { | |
334 | struct st21nfca_dep_req_res *dep_req; | |
335 | u8 size; | |
336 | int r; | |
337 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
338 | ||
339 | skb_trim(skb, skb->len - 1); | |
1892bf84 CR |
340 | |
341 | size = 4; | |
342 | ||
343 | dep_req = (struct st21nfca_dep_req_res *)skb->data; | |
344 | if (skb->len < size) { | |
345 | r = -EIO; | |
346 | goto exit; | |
347 | } | |
348 | ||
349 | if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) | |
350 | size++; | |
351 | if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) | |
352 | size++; | |
353 | ||
354 | if (skb->len < size) { | |
355 | r = -EIO; | |
356 | goto exit; | |
357 | } | |
358 | ||
359 | /* Receiving DEP_REQ - Decoding */ | |
360 | switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { | |
361 | case ST21NFCA_NFC_DEP_PFB_I_PDU: | |
362 | info->dep_info.curr_nfc_dep_pni = | |
363 | ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); | |
364 | break; | |
365 | case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: | |
366 | pr_err("Received a ACK/NACK PDU\n"); | |
367 | break; | |
368 | case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: | |
369 | pr_err("Received a SUPERVISOR PDU\n"); | |
370 | break; | |
371 | } | |
372 | ||
1892bf84 CR |
373 | skb_pull(skb, size); |
374 | ||
375 | return nfc_tm_data_received(hdev->ndev, skb); | |
376 | exit: | |
377 | return r; | |
378 | } | |
379 | ||
a4415e76 CR |
380 | static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, |
381 | struct sk_buff *skb) | |
1892bf84 CR |
382 | { |
383 | u8 cmd0, cmd1; | |
384 | int r; | |
385 | ||
386 | cmd0 = skb->data[1]; | |
387 | switch (cmd0) { | |
388 | case ST21NFCA_NFCIP1_REQ: | |
389 | cmd1 = skb->data[2]; | |
390 | switch (cmd1) { | |
391 | case ST21NFCA_NFCIP1_ATR_REQ: | |
392 | r = st21nfca_tm_recv_atr_req(hdev, skb); | |
393 | break; | |
394 | case ST21NFCA_NFCIP1_PSL_REQ: | |
395 | r = st21nfca_tm_recv_psl_req(hdev, skb); | |
396 | break; | |
397 | case ST21NFCA_NFCIP1_DEP_REQ: | |
398 | r = st21nfca_tm_recv_dep_req(hdev, skb); | |
399 | break; | |
400 | default: | |
401 | return 1; | |
402 | } | |
403 | default: | |
404 | return 1; | |
405 | } | |
406 | return r; | |
407 | } | |
a4415e76 CR |
408 | |
409 | /* | |
410 | * Returns: | |
411 | * <= 0: driver handled the event, skb consumed | |
412 | * 1: driver does not handle the event, please do standard processing | |
413 | */ | |
414 | int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, | |
415 | u8 event, struct sk_buff *skb) | |
416 | { | |
417 | int r = 0; | |
418 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
419 | ||
420 | pr_debug("dep event: %d\n", event); | |
421 | ||
422 | switch (event) { | |
423 | case ST21NFCA_EVT_CARD_ACTIVATED: | |
424 | info->dep_info.curr_nfc_dep_pni = 0; | |
425 | break; | |
426 | case ST21NFCA_EVT_CARD_DEACTIVATED: | |
427 | break; | |
428 | case ST21NFCA_EVT_FIELD_ON: | |
429 | break; | |
430 | case ST21NFCA_EVT_FIELD_OFF: | |
431 | break; | |
432 | case ST21NFCA_EVT_SEND_DATA: | |
433 | r = st21nfca_tm_event_send_data(hdev, skb); | |
434 | if (r < 0) | |
435 | return r; | |
436 | return 0; | |
437 | default: | |
a9e062d0 | 438 | nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n"); |
a4415e76 CR |
439 | return 1; |
440 | } | |
441 | kfree_skb(skb); | |
442 | return r; | |
443 | } | |
444 | EXPORT_SYMBOL(st21nfca_dep_event_received); | |
1892bf84 CR |
445 | |
446 | static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, | |
447 | u8 bri, u8 lri) | |
448 | { | |
449 | struct sk_buff *skb; | |
450 | struct st21nfca_psl_req *psl_req; | |
451 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
452 | ||
453 | skb = | |
454 | alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); | |
455 | if (!skb) | |
456 | return; | |
457 | skb_reserve(skb, 1); | |
458 | ||
459 | skb_put(skb, sizeof(struct st21nfca_psl_req)); | |
460 | psl_req = (struct st21nfca_psl_req *) skb->data; | |
461 | ||
462 | psl_req->length = sizeof(struct st21nfca_psl_req); | |
463 | psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; | |
464 | psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; | |
465 | psl_req->did = did; | |
466 | psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); | |
467 | psl_req->fsl = lri; | |
468 | ||
d58ff351 | 469 | *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; |
1892bf84 CR |
470 | |
471 | st21nfca_im_send_pdu(info, skb); | |
1892bf84 CR |
472 | } |
473 | ||
474 | #define ST21NFCA_CB_TYPE_READER_F 1 | |
475 | static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, | |
476 | int err) | |
477 | { | |
478 | struct st21nfca_hci_info *info = context; | |
479 | struct st21nfca_atr_res *atr_res; | |
480 | int r; | |
481 | ||
482 | if (err != 0) | |
483 | return; | |
484 | ||
459e794b | 485 | if (!skb) |
1892bf84 CR |
486 | return; |
487 | ||
488 | switch (info->async_cb_type) { | |
489 | case ST21NFCA_CB_TYPE_READER_F: | |
490 | skb_trim(skb, skb->len - 1); | |
491 | atr_res = (struct st21nfca_atr_res *)skb->data; | |
492 | r = nfc_set_remote_general_bytes(info->hdev->ndev, | |
493 | atr_res->gbi, | |
494 | skb->len - sizeof(struct st21nfca_atr_res)); | |
495 | if (r < 0) | |
496 | return; | |
497 | ||
498 | if (atr_res->to >= 0x0e) | |
499 | info->dep_info.to = 0x0e; | |
500 | else | |
501 | info->dep_info.to = atr_res->to + 1; | |
502 | ||
503 | info->dep_info.to |= 0x10; | |
504 | ||
505 | r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, | |
506 | NFC_COMM_PASSIVE, NFC_RF_INITIATOR); | |
507 | if (r < 0) | |
508 | return; | |
509 | ||
510 | info->dep_info.curr_nfc_dep_pni = 0; | |
511 | if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) | |
512 | st21nfca_im_send_psl_req(info->hdev, atr_res->did, | |
513 | atr_res->bsi, atr_res->bri, | |
514 | ST21NFCA_PP2LRI(atr_res->ppi)); | |
515 | break; | |
516 | default: | |
32b41d8f | 517 | kfree_skb(skb); |
1892bf84 CR |
518 | break; |
519 | } | |
520 | } | |
521 | ||
522 | int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) | |
523 | { | |
524 | struct sk_buff *skb; | |
525 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
526 | struct st21nfca_atr_req *atr_req; | |
527 | struct nfc_target *target; | |
528 | uint size; | |
529 | ||
530 | info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; | |
531 | size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; | |
532 | if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { | |
533 | PROTOCOL_ERR("14.6.1.1"); | |
534 | return -EINVAL; | |
535 | } | |
536 | ||
537 | skb = | |
538 | alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); | |
539 | if (!skb) | |
540 | return -ENOMEM; | |
541 | ||
542 | skb_reserve(skb, 1); | |
543 | ||
544 | skb_put(skb, sizeof(struct st21nfca_atr_req)); | |
545 | ||
546 | atr_req = (struct st21nfca_atr_req *)skb->data; | |
547 | memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); | |
548 | ||
549 | atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; | |
550 | atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; | |
551 | memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); | |
552 | target = hdev->ndev->targets; | |
553 | ||
72030a2e | 554 | if (target->sensf_res_len > 0) |
1892bf84 CR |
555 | memcpy(atr_req->nfcid3, target->sensf_res, |
556 | target->sensf_res_len); | |
557 | else | |
558 | get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); | |
559 | ||
560 | atr_req->did = 0x0; | |
561 | ||
562 | atr_req->bsi = 0x00; | |
563 | atr_req->bri = 0x00; | |
564 | atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; | |
565 | if (gb_len) { | |
566 | atr_req->ppi |= ST21NFCA_GB_BIT; | |
59ae1d12 | 567 | skb_put_data(skb, gb, gb_len); |
1892bf84 CR |
568 | } |
569 | atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; | |
570 | ||
d58ff351 | 571 | *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ |
1892bf84 CR |
572 | |
573 | info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; | |
574 | info->async_cb_context = info; | |
575 | info->async_cb = st21nfca_im_recv_atr_res_cb; | |
576 | info->dep_info.bri = atr_req->bri; | |
577 | info->dep_info.bsi = atr_req->bsi; | |
578 | info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); | |
579 | ||
580 | return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, | |
581 | ST21NFCA_WR_XCHG_DATA, skb->data, | |
582 | skb->len, info->async_cb, info); | |
583 | } | |
584 | EXPORT_SYMBOL(st21nfca_im_send_atr_req); | |
585 | ||
586 | static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, | |
587 | int err) | |
588 | { | |
589 | struct st21nfca_hci_info *info = context; | |
590 | struct st21nfca_dep_req_res *dep_res; | |
591 | ||
592 | int size; | |
593 | ||
594 | if (err != 0) | |
595 | return; | |
596 | ||
459e794b | 597 | if (!skb) |
1892bf84 CR |
598 | return; |
599 | ||
600 | switch (info->async_cb_type) { | |
601 | case ST21NFCA_CB_TYPE_READER_F: | |
602 | dep_res = (struct st21nfca_dep_req_res *)skb->data; | |
603 | ||
604 | size = 3; | |
605 | if (skb->len < size) | |
606 | goto exit; | |
607 | ||
608 | if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) | |
609 | size++; | |
610 | if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) | |
611 | size++; | |
612 | ||
613 | if (skb->len < size) | |
614 | goto exit; | |
615 | ||
616 | skb_trim(skb, skb->len - 1); | |
617 | ||
618 | /* Receiving DEP_REQ - Decoding */ | |
619 | switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { | |
620 | case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: | |
621 | pr_err("Received a ACK/NACK PDU\n"); | |
622 | case ST21NFCA_NFC_DEP_PFB_I_PDU: | |
623 | info->dep_info.curr_nfc_dep_pni = | |
624 | ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); | |
625 | size++; | |
626 | skb_pull(skb, size); | |
627 | nfc_tm_data_received(info->hdev->ndev, skb); | |
628 | break; | |
629 | case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: | |
630 | pr_err("Received a SUPERVISOR PDU\n"); | |
631 | skb_pull(skb, size); | |
d58ff351 JB |
632 | *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; |
633 | *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; | |
634 | *(u8 *)skb_push(skb, 1) = skb->len; | |
635 | *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; | |
1892bf84 CR |
636 | |
637 | st21nfca_im_send_pdu(info, skb); | |
638 | break; | |
639 | } | |
640 | ||
641 | return; | |
642 | default: | |
643 | break; | |
644 | } | |
645 | ||
646 | exit: | |
32b41d8f | 647 | kfree_skb(skb); |
1892bf84 CR |
648 | } |
649 | ||
650 | int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) | |
651 | { | |
652 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
653 | ||
654 | info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; | |
655 | info->async_cb_context = info; | |
656 | info->async_cb = st21nfca_im_recv_dep_res_cb; | |
657 | ||
d58ff351 JB |
658 | *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; |
659 | *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; | |
660 | *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; | |
661 | *(u8 *)skb_push(skb, 1) = skb->len; | |
1892bf84 | 662 | |
d58ff351 | 663 | *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; |
1892bf84 CR |
664 | |
665 | return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, | |
666 | ST21NFCA_WR_XCHG_DATA, | |
667 | skb->data, skb->len, | |
668 | info->async_cb, info); | |
669 | } | |
670 | EXPORT_SYMBOL(st21nfca_im_send_dep_req); | |
671 | ||
672 | void st21nfca_dep_init(struct nfc_hci_dev *hdev) | |
673 | { | |
674 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
675 | ||
676 | INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); | |
677 | info->dep_info.curr_nfc_dep_pni = 0; | |
678 | info->dep_info.idx = 0; | |
679 | info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; | |
680 | } | |
681 | EXPORT_SYMBOL(st21nfca_dep_init); | |
682 | ||
683 | void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) | |
684 | { | |
685 | struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); | |
686 | ||
687 | cancel_work_sync(&info->dep_info.tx_work); | |
688 | } | |
689 | EXPORT_SYMBOL(st21nfca_dep_deinit); |