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Commit | Line | Data |
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7d0911c0 TE |
1 | /* |
2 | * NFC Digital Protocol stack | |
3 | * Copyright (c) 2013, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
c5da0e4a SO |
16 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
17 | ||
7d0911c0 TE |
18 | #include "digital.h" |
19 | ||
20 | #define DIGITAL_NFC_DEP_FRAME_DIR_OUT 0xD4 | |
21 | #define DIGITAL_NFC_DEP_FRAME_DIR_IN 0xD5 | |
22 | ||
23 | #define DIGITAL_NFC_DEP_NFCA_SOD_SB 0xF0 | |
24 | ||
25 | #define DIGITAL_CMD_ATR_REQ 0x00 | |
26 | #define DIGITAL_CMD_ATR_RES 0x01 | |
27 | #define DIGITAL_CMD_PSL_REQ 0x04 | |
28 | #define DIGITAL_CMD_PSL_RES 0x05 | |
29 | #define DIGITAL_CMD_DEP_REQ 0x06 | |
30 | #define DIGITAL_CMD_DEP_RES 0x07 | |
31 | ||
32 | #define DIGITAL_ATR_REQ_MIN_SIZE 16 | |
33 | #define DIGITAL_ATR_REQ_MAX_SIZE 64 | |
34 | ||
05afedcb MG |
35 | #define DIGITAL_DID_MAX 14 |
36 | ||
7d0911c0 | 37 | #define DIGITAL_LR_BITS_PAYLOAD_SIZE_254B 0x30 |
dddb3da0 MG |
38 | #define DIGITAL_FSL_BITS_PAYLOAD_SIZE_254B \ |
39 | (DIGITAL_LR_BITS_PAYLOAD_SIZE_254B >> 4) | |
7d0911c0 TE |
40 | #define DIGITAL_GB_BIT 0x02 |
41 | ||
42 | #define DIGITAL_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) | |
43 | ||
44 | #define DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT 0x10 | |
05afedcb | 45 | #define DIGITAL_NFC_DEP_PFB_DID_BIT 0x04 |
7d0911c0 TE |
46 | |
47 | #define DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ | |
48 | ((pfb) & DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT) | |
49 | #define DIGITAL_NFC_DEP_MI_BIT_SET(pfb) ((pfb) & 0x10) | |
50 | #define DIGITAL_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) | |
05afedcb | 51 | #define DIGITAL_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & DIGITAL_NFC_DEP_PFB_DID_BIT) |
7d0911c0 TE |
52 | #define DIGITAL_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) |
53 | ||
54 | #define DIGITAL_NFC_DEP_PFB_I_PDU 0x00 | |
55 | #define DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU 0x40 | |
56 | #define DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 | |
57 | ||
58 | struct digital_atr_req { | |
59 | u8 dir; | |
60 | u8 cmd; | |
61 | u8 nfcid3[10]; | |
62 | u8 did; | |
63 | u8 bs; | |
64 | u8 br; | |
65 | u8 pp; | |
66 | u8 gb[0]; | |
67 | } __packed; | |
68 | ||
69 | struct digital_atr_res { | |
70 | u8 dir; | |
71 | u8 cmd; | |
72 | u8 nfcid3[10]; | |
73 | u8 did; | |
74 | u8 bs; | |
75 | u8 br; | |
76 | u8 to; | |
77 | u8 pp; | |
78 | u8 gb[0]; | |
79 | } __packed; | |
80 | ||
81 | struct digital_psl_req { | |
82 | u8 dir; | |
83 | u8 cmd; | |
84 | u8 did; | |
85 | u8 brs; | |
86 | u8 fsl; | |
87 | } __packed; | |
88 | ||
89 | struct digital_psl_res { | |
90 | u8 dir; | |
91 | u8 cmd; | |
92 | u8 did; | |
93 | } __packed; | |
94 | ||
95 | struct digital_dep_req_res { | |
96 | u8 dir; | |
97 | u8 cmd; | |
98 | u8 pfb; | |
99 | } __packed; | |
100 | ||
101 | static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, | |
102 | struct sk_buff *resp); | |
103 | ||
104 | static void digital_skb_push_dep_sod(struct nfc_digital_dev *ddev, | |
105 | struct sk_buff *skb) | |
106 | { | |
107 | skb_push(skb, sizeof(u8)); | |
108 | ||
109 | skb->data[0] = skb->len; | |
110 | ||
111 | if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A) | |
112 | *skb_push(skb, sizeof(u8)) = DIGITAL_NFC_DEP_NFCA_SOD_SB; | |
113 | } | |
114 | ||
115 | static int digital_skb_pull_dep_sod(struct nfc_digital_dev *ddev, | |
116 | struct sk_buff *skb) | |
117 | { | |
118 | u8 size; | |
119 | ||
120 | if (skb->len < 2) | |
121 | return -EIO; | |
122 | ||
123 | if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A) | |
124 | skb_pull(skb, sizeof(u8)); | |
125 | ||
126 | size = skb->data[0]; | |
127 | if (size != skb->len) | |
128 | return -EIO; | |
129 | ||
130 | skb_pull(skb, sizeof(u8)); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
dddb3da0 MG |
135 | static void digital_in_recv_psl_res(struct nfc_digital_dev *ddev, void *arg, |
136 | struct sk_buff *resp) | |
137 | { | |
138 | struct nfc_target *target = arg; | |
139 | struct digital_psl_res *psl_res; | |
140 | int rc; | |
141 | ||
142 | if (IS_ERR(resp)) { | |
143 | rc = PTR_ERR(resp); | |
144 | resp = NULL; | |
145 | goto exit; | |
146 | } | |
147 | ||
148 | rc = ddev->skb_check_crc(resp); | |
149 | if (rc) { | |
150 | PROTOCOL_ERR("14.4.1.6"); | |
151 | goto exit; | |
152 | } | |
153 | ||
154 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
155 | if (rc) { | |
156 | PROTOCOL_ERR("14.4.1.2"); | |
157 | goto exit; | |
158 | } | |
159 | ||
160 | psl_res = (struct digital_psl_res *)resp->data; | |
161 | ||
162 | if ((resp->len != sizeof(*psl_res)) || | |
163 | (psl_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN) || | |
164 | (psl_res->cmd != DIGITAL_CMD_PSL_RES)) { | |
165 | rc = -EIO; | |
166 | goto exit; | |
167 | } | |
168 | ||
169 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, | |
170 | NFC_DIGITAL_RF_TECH_424F); | |
171 | if (rc) | |
172 | goto exit; | |
173 | ||
174 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
175 | NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); | |
176 | if (rc) | |
177 | goto exit; | |
178 | ||
179 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev) && | |
180 | (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A)) { | |
181 | ddev->skb_add_crc = digital_skb_add_crc_f; | |
182 | ddev->skb_check_crc = digital_skb_check_crc_f; | |
183 | } | |
184 | ||
185 | ddev->curr_rf_tech = NFC_DIGITAL_RF_TECH_424F; | |
186 | ||
187 | nfc_dep_link_is_up(ddev->nfc_dev, target->idx, NFC_COMM_ACTIVE, | |
188 | NFC_RF_INITIATOR); | |
189 | ||
190 | ddev->curr_nfc_dep_pni = 0; | |
191 | ||
192 | exit: | |
193 | dev_kfree_skb(resp); | |
194 | ||
195 | if (rc) | |
196 | ddev->curr_protocol = 0; | |
197 | } | |
198 | ||
199 | static int digital_in_send_psl_req(struct nfc_digital_dev *ddev, | |
200 | struct nfc_target *target) | |
201 | { | |
202 | struct sk_buff *skb; | |
203 | struct digital_psl_req *psl_req; | |
b15829ba | 204 | int rc; |
dddb3da0 MG |
205 | |
206 | skb = digital_skb_alloc(ddev, sizeof(*psl_req)); | |
207 | if (!skb) | |
208 | return -ENOMEM; | |
209 | ||
210 | skb_put(skb, sizeof(*psl_req)); | |
211 | ||
212 | psl_req = (struct digital_psl_req *)skb->data; | |
213 | ||
214 | psl_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
215 | psl_req->cmd = DIGITAL_CMD_PSL_REQ; | |
216 | psl_req->did = 0; | |
217 | psl_req->brs = (0x2 << 3) | 0x2; /* 424F both directions */ | |
218 | psl_req->fsl = DIGITAL_FSL_BITS_PAYLOAD_SIZE_254B; | |
219 | ||
220 | digital_skb_push_dep_sod(ddev, skb); | |
221 | ||
222 | ddev->skb_add_crc(skb); | |
223 | ||
b15829ba MG |
224 | rc = digital_in_send_cmd(ddev, skb, 500, digital_in_recv_psl_res, |
225 | target); | |
226 | if (rc) | |
227 | kfree_skb(skb); | |
228 | ||
229 | return rc; | |
dddb3da0 MG |
230 | } |
231 | ||
7d0911c0 TE |
232 | static void digital_in_recv_atr_res(struct nfc_digital_dev *ddev, void *arg, |
233 | struct sk_buff *resp) | |
234 | { | |
235 | struct nfc_target *target = arg; | |
236 | struct digital_atr_res *atr_res; | |
237 | u8 gb_len; | |
238 | int rc; | |
239 | ||
240 | if (IS_ERR(resp)) { | |
241 | rc = PTR_ERR(resp); | |
242 | resp = NULL; | |
243 | goto exit; | |
244 | } | |
245 | ||
246 | rc = ddev->skb_check_crc(resp); | |
247 | if (rc) { | |
248 | PROTOCOL_ERR("14.4.1.6"); | |
249 | goto exit; | |
250 | } | |
251 | ||
252 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
253 | if (rc) { | |
254 | PROTOCOL_ERR("14.4.1.2"); | |
255 | goto exit; | |
256 | } | |
257 | ||
258 | if (resp->len < sizeof(struct digital_atr_res)) { | |
259 | rc = -EIO; | |
260 | goto exit; | |
261 | } | |
262 | ||
263 | gb_len = resp->len - sizeof(struct digital_atr_res); | |
264 | ||
265 | atr_res = (struct digital_atr_res *)resp->data; | |
266 | ||
267 | rc = nfc_set_remote_general_bytes(ddev->nfc_dev, atr_res->gb, gb_len); | |
268 | if (rc) | |
269 | goto exit; | |
270 | ||
dddb3da0 MG |
271 | if ((ddev->protocols & NFC_PROTO_FELICA_MASK) && |
272 | (ddev->curr_rf_tech != NFC_DIGITAL_RF_TECH_424F)) { | |
273 | rc = digital_in_send_psl_req(ddev, target); | |
274 | if (!rc) | |
275 | goto exit; | |
276 | } | |
277 | ||
7d0911c0 TE |
278 | rc = nfc_dep_link_is_up(ddev->nfc_dev, target->idx, NFC_COMM_ACTIVE, |
279 | NFC_RF_INITIATOR); | |
280 | ||
281 | ddev->curr_nfc_dep_pni = 0; | |
282 | ||
283 | exit: | |
284 | dev_kfree_skb(resp); | |
285 | ||
286 | if (rc) | |
287 | ddev->curr_protocol = 0; | |
288 | } | |
289 | ||
290 | int digital_in_send_atr_req(struct nfc_digital_dev *ddev, | |
291 | struct nfc_target *target, __u8 comm_mode, __u8 *gb, | |
292 | size_t gb_len) | |
293 | { | |
294 | struct sk_buff *skb; | |
295 | struct digital_atr_req *atr_req; | |
296 | uint size; | |
b15829ba | 297 | int rc; |
7d0911c0 TE |
298 | |
299 | size = DIGITAL_ATR_REQ_MIN_SIZE + gb_len; | |
300 | ||
301 | if (size > DIGITAL_ATR_REQ_MAX_SIZE) { | |
302 | PROTOCOL_ERR("14.6.1.1"); | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | skb = digital_skb_alloc(ddev, size); | |
307 | if (!skb) | |
308 | return -ENOMEM; | |
309 | ||
310 | skb_put(skb, sizeof(struct digital_atr_req)); | |
311 | ||
312 | atr_req = (struct digital_atr_req *)skb->data; | |
313 | memset(atr_req, 0, sizeof(struct digital_atr_req)); | |
314 | ||
315 | atr_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
316 | atr_req->cmd = DIGITAL_CMD_ATR_REQ; | |
317 | if (target->nfcid2_len) | |
4f319e32 | 318 | memcpy(atr_req->nfcid3, target->nfcid2, NFC_NFCID2_MAXSIZE); |
7d0911c0 | 319 | else |
4f319e32 | 320 | get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); |
7d0911c0 TE |
321 | |
322 | atr_req->did = 0; | |
323 | atr_req->bs = 0; | |
324 | atr_req->br = 0; | |
325 | ||
326 | atr_req->pp = DIGITAL_LR_BITS_PAYLOAD_SIZE_254B; | |
327 | ||
328 | if (gb_len) { | |
329 | atr_req->pp |= DIGITAL_GB_BIT; | |
330 | memcpy(skb_put(skb, gb_len), gb, gb_len); | |
331 | } | |
332 | ||
333 | digital_skb_push_dep_sod(ddev, skb); | |
334 | ||
335 | ddev->skb_add_crc(skb); | |
336 | ||
b15829ba MG |
337 | rc = digital_in_send_cmd(ddev, skb, 500, digital_in_recv_atr_res, |
338 | target); | |
339 | if (rc) | |
340 | kfree_skb(skb); | |
341 | ||
342 | return rc; | |
7d0911c0 TE |
343 | } |
344 | ||
345 | static int digital_in_send_rtox(struct nfc_digital_dev *ddev, | |
346 | struct digital_data_exch *data_exch, u8 rtox) | |
347 | { | |
348 | struct digital_dep_req_res *dep_req; | |
349 | struct sk_buff *skb; | |
350 | int rc; | |
351 | ||
352 | skb = digital_skb_alloc(ddev, 1); | |
353 | if (!skb) | |
354 | return -ENOMEM; | |
355 | ||
356 | *skb_put(skb, 1) = rtox; | |
357 | ||
358 | skb_push(skb, sizeof(struct digital_dep_req_res)); | |
359 | ||
360 | dep_req = (struct digital_dep_req_res *)skb->data; | |
361 | ||
362 | dep_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
363 | dep_req->cmd = DIGITAL_CMD_DEP_REQ; | |
364 | dep_req->pfb = DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU | | |
365 | DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT; | |
366 | ||
367 | digital_skb_push_dep_sod(ddev, skb); | |
368 | ||
369 | ddev->skb_add_crc(skb); | |
370 | ||
371 | rc = digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res, | |
372 | data_exch); | |
b15829ba MG |
373 | if (rc) |
374 | kfree_skb(skb); | |
7d0911c0 TE |
375 | |
376 | return rc; | |
377 | } | |
378 | ||
379 | static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, | |
380 | struct sk_buff *resp) | |
381 | { | |
382 | struct digital_data_exch *data_exch = arg; | |
383 | struct digital_dep_req_res *dep_res; | |
384 | u8 pfb; | |
385 | uint size; | |
386 | int rc; | |
387 | ||
388 | if (IS_ERR(resp)) { | |
389 | rc = PTR_ERR(resp); | |
390 | resp = NULL; | |
391 | goto exit; | |
392 | } | |
393 | ||
394 | rc = ddev->skb_check_crc(resp); | |
395 | if (rc) { | |
396 | PROTOCOL_ERR("14.4.1.6"); | |
397 | goto error; | |
398 | } | |
399 | ||
400 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
401 | if (rc) { | |
402 | PROTOCOL_ERR("14.4.1.2"); | |
403 | goto exit; | |
404 | } | |
405 | ||
6ce30668 | 406 | size = sizeof(struct digital_dep_req_res); |
7d0911c0 TE |
407 | dep_res = (struct digital_dep_req_res *)resp->data; |
408 | ||
6ce30668 | 409 | if (resp->len < size || dep_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN || |
7d0911c0 TE |
410 | dep_res->cmd != DIGITAL_CMD_DEP_RES) { |
411 | rc = -EIO; | |
412 | goto error; | |
413 | } | |
414 | ||
415 | pfb = dep_res->pfb; | |
416 | ||
3bc3f88a MG |
417 | if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb)) { |
418 | PROTOCOL_ERR("14.8.2.1"); | |
419 | rc = -EIO; | |
420 | goto error; | |
421 | } | |
6ce30668 MG |
422 | |
423 | if (size > resp->len) { | |
424 | rc = -EIO; | |
425 | goto error; | |
426 | } | |
427 | ||
428 | skb_pull(resp, size); | |
429 | ||
7d0911c0 TE |
430 | switch (DIGITAL_NFC_DEP_PFB_TYPE(pfb)) { |
431 | case DIGITAL_NFC_DEP_PFB_I_PDU: | |
432 | if (DIGITAL_NFC_DEP_PFB_PNI(pfb) != ddev->curr_nfc_dep_pni) { | |
433 | PROTOCOL_ERR("14.12.3.3"); | |
434 | rc = -EIO; | |
435 | goto error; | |
436 | } | |
437 | ||
438 | ddev->curr_nfc_dep_pni = | |
439 | DIGITAL_NFC_DEP_PFB_PNI(ddev->curr_nfc_dep_pni + 1); | |
440 | rc = 0; | |
441 | break; | |
442 | ||
443 | case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU: | |
26042530 | 444 | pr_err("Received a ACK/NACK PDU\n"); |
7d0911c0 TE |
445 | rc = -EIO; |
446 | goto error; | |
447 | ||
448 | case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU: | |
449 | if (!DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb)) { | |
450 | rc = -EINVAL; | |
451 | goto error; | |
452 | } | |
453 | ||
6ce30668 | 454 | rc = digital_in_send_rtox(ddev, data_exch, resp->data[0]); |
7d0911c0 TE |
455 | if (rc) |
456 | goto error; | |
457 | ||
458 | kfree_skb(resp); | |
459 | return; | |
460 | } | |
461 | ||
462 | if (DIGITAL_NFC_DEP_MI_BIT_SET(pfb)) { | |
26042530 | 463 | pr_err("MI bit set. Chained PDU not supported\n"); |
7d0911c0 TE |
464 | rc = -EIO; |
465 | goto error; | |
466 | } | |
467 | ||
7d0911c0 TE |
468 | exit: |
469 | data_exch->cb(data_exch->cb_context, resp, rc); | |
470 | ||
471 | error: | |
472 | kfree(data_exch); | |
473 | ||
474 | if (rc) | |
475 | kfree_skb(resp); | |
476 | } | |
477 | ||
478 | int digital_in_send_dep_req(struct nfc_digital_dev *ddev, | |
479 | struct nfc_target *target, struct sk_buff *skb, | |
480 | struct digital_data_exch *data_exch) | |
481 | { | |
482 | struct digital_dep_req_res *dep_req; | |
483 | ||
484 | skb_push(skb, sizeof(struct digital_dep_req_res)); | |
485 | ||
486 | dep_req = (struct digital_dep_req_res *)skb->data; | |
487 | dep_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
488 | dep_req->cmd = DIGITAL_CMD_DEP_REQ; | |
489 | dep_req->pfb = ddev->curr_nfc_dep_pni; | |
490 | ||
491 | digital_skb_push_dep_sod(ddev, skb); | |
492 | ||
493 | ddev->skb_add_crc(skb); | |
494 | ||
495 | return digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res, | |
496 | data_exch); | |
497 | } | |
1c7a4c24 | 498 | |
b711ad52 TE |
499 | static void digital_tg_set_rf_tech(struct nfc_digital_dev *ddev, u8 rf_tech) |
500 | { | |
501 | ddev->curr_rf_tech = rf_tech; | |
502 | ||
503 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
504 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
505 | ||
506 | if (DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
507 | return; | |
508 | ||
509 | switch (ddev->curr_rf_tech) { | |
510 | case NFC_DIGITAL_RF_TECH_106A: | |
511 | ddev->skb_add_crc = digital_skb_add_crc_a; | |
512 | ddev->skb_check_crc = digital_skb_check_crc_a; | |
513 | break; | |
514 | ||
515 | case NFC_DIGITAL_RF_TECH_212F: | |
516 | case NFC_DIGITAL_RF_TECH_424F: | |
517 | ddev->skb_add_crc = digital_skb_add_crc_f; | |
518 | ddev->skb_check_crc = digital_skb_check_crc_f; | |
519 | break; | |
520 | ||
521 | default: | |
522 | break; | |
523 | } | |
524 | } | |
525 | ||
1c7a4c24 TE |
526 | static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg, |
527 | struct sk_buff *resp) | |
528 | { | |
529 | int rc; | |
530 | struct digital_dep_req_res *dep_req; | |
6ce30668 | 531 | u8 pfb; |
1c7a4c24 TE |
532 | size_t size; |
533 | ||
534 | if (IS_ERR(resp)) { | |
535 | rc = PTR_ERR(resp); | |
536 | resp = NULL; | |
537 | goto exit; | |
538 | } | |
539 | ||
540 | rc = ddev->skb_check_crc(resp); | |
541 | if (rc) { | |
542 | PROTOCOL_ERR("14.4.1.6"); | |
543 | goto exit; | |
544 | } | |
545 | ||
546 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
547 | if (rc) { | |
548 | PROTOCOL_ERR("14.4.1.2"); | |
549 | goto exit; | |
550 | } | |
551 | ||
552 | size = sizeof(struct digital_dep_req_res); | |
553 | dep_req = (struct digital_dep_req_res *)resp->data; | |
554 | ||
555 | if (resp->len < size || dep_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || | |
556 | dep_req->cmd != DIGITAL_CMD_DEP_REQ) { | |
557 | rc = -EIO; | |
558 | goto exit; | |
559 | } | |
560 | ||
6ce30668 MG |
561 | pfb = dep_req->pfb; |
562 | ||
05afedcb MG |
563 | if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb)) { |
564 | if (ddev->did && (ddev->did == resp->data[3])) { | |
565 | size++; | |
566 | } else { | |
567 | rc = -EIO; | |
568 | goto exit; | |
569 | } | |
570 | } else if (ddev->did) { | |
571 | rc = -EIO; | |
572 | goto exit; | |
573 | } | |
1c7a4c24 | 574 | |
6ce30668 | 575 | if (size > resp->len) { |
1c7a4c24 TE |
576 | rc = -EIO; |
577 | goto exit; | |
578 | } | |
579 | ||
6ce30668 MG |
580 | skb_pull(resp, size); |
581 | ||
582 | switch (DIGITAL_NFC_DEP_PFB_TYPE(pfb)) { | |
1c7a4c24 | 583 | case DIGITAL_NFC_DEP_PFB_I_PDU: |
26042530 | 584 | pr_debug("DIGITAL_NFC_DEP_PFB_I_PDU\n"); |
6ce30668 | 585 | ddev->curr_nfc_dep_pni = DIGITAL_NFC_DEP_PFB_PNI(pfb); |
1c7a4c24 TE |
586 | break; |
587 | case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU: | |
26042530 | 588 | pr_err("Received a ACK/NACK PDU\n"); |
1c7a4c24 TE |
589 | rc = -EINVAL; |
590 | goto exit; | |
1c7a4c24 | 591 | case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU: |
26042530 | 592 | pr_err("Received a SUPERVISOR PDU\n"); |
1c7a4c24 TE |
593 | rc = -EINVAL; |
594 | goto exit; | |
1c7a4c24 TE |
595 | } |
596 | ||
1c7a4c24 TE |
597 | rc = nfc_tm_data_received(ddev->nfc_dev, resp); |
598 | ||
599 | exit: | |
600 | if (rc) | |
601 | kfree_skb(resp); | |
602 | } | |
603 | ||
604 | int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb) | |
605 | { | |
606 | struct digital_dep_req_res *dep_res; | |
607 | ||
608 | skb_push(skb, sizeof(struct digital_dep_req_res)); | |
609 | dep_res = (struct digital_dep_req_res *)skb->data; | |
610 | ||
611 | dep_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; | |
612 | dep_res->cmd = DIGITAL_CMD_DEP_RES; | |
613 | dep_res->pfb = ddev->curr_nfc_dep_pni; | |
614 | ||
05afedcb MG |
615 | if (ddev->did) { |
616 | dep_res->pfb |= DIGITAL_NFC_DEP_PFB_DID_BIT; | |
617 | ||
618 | memcpy(skb_put(skb, sizeof(ddev->did)), &ddev->did, | |
619 | sizeof(ddev->did)); | |
620 | } | |
621 | ||
1c7a4c24 TE |
622 | digital_skb_push_dep_sod(ddev, skb); |
623 | ||
624 | ddev->skb_add_crc(skb); | |
625 | ||
626 | return digital_tg_send_cmd(ddev, skb, 1500, digital_tg_recv_dep_req, | |
627 | NULL); | |
628 | } | |
629 | ||
630 | static void digital_tg_send_psl_res_complete(struct nfc_digital_dev *ddev, | |
631 | void *arg, struct sk_buff *resp) | |
632 | { | |
67af1d7a | 633 | u8 rf_tech = (unsigned long)arg; |
1c7a4c24 TE |
634 | |
635 | if (IS_ERR(resp)) | |
636 | return; | |
637 | ||
b711ad52 TE |
638 | digital_tg_set_rf_tech(ddev, rf_tech); |
639 | ||
1c7a4c24 TE |
640 | digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
641 | ||
642 | digital_tg_listen(ddev, 1500, digital_tg_recv_dep_req, NULL); | |
643 | ||
644 | dev_kfree_skb(resp); | |
645 | } | |
646 | ||
647 | static int digital_tg_send_psl_res(struct nfc_digital_dev *ddev, u8 did, | |
648 | u8 rf_tech) | |
649 | { | |
650 | struct digital_psl_res *psl_res; | |
651 | struct sk_buff *skb; | |
652 | int rc; | |
653 | ||
654 | skb = digital_skb_alloc(ddev, sizeof(struct digital_psl_res)); | |
655 | if (!skb) | |
656 | return -ENOMEM; | |
657 | ||
658 | skb_put(skb, sizeof(struct digital_psl_res)); | |
659 | ||
660 | psl_res = (struct digital_psl_res *)skb->data; | |
661 | ||
662 | psl_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; | |
663 | psl_res->cmd = DIGITAL_CMD_PSL_RES; | |
664 | psl_res->did = did; | |
665 | ||
666 | digital_skb_push_dep_sod(ddev, skb); | |
667 | ||
668 | ddev->skb_add_crc(skb); | |
669 | ||
670 | rc = digital_tg_send_cmd(ddev, skb, 0, digital_tg_send_psl_res_complete, | |
67af1d7a | 671 | (void *)(unsigned long)rf_tech); |
1c7a4c24 TE |
672 | if (rc) |
673 | kfree_skb(skb); | |
674 | ||
675 | return rc; | |
676 | } | |
677 | ||
678 | static void digital_tg_recv_psl_req(struct nfc_digital_dev *ddev, void *arg, | |
679 | struct sk_buff *resp) | |
680 | { | |
681 | int rc; | |
682 | struct digital_psl_req *psl_req; | |
683 | u8 rf_tech; | |
684 | u8 dsi; | |
685 | ||
686 | if (IS_ERR(resp)) { | |
687 | rc = PTR_ERR(resp); | |
688 | resp = NULL; | |
689 | goto exit; | |
690 | } | |
691 | ||
692 | rc = ddev->skb_check_crc(resp); | |
693 | if (rc) { | |
694 | PROTOCOL_ERR("14.4.1.6"); | |
695 | goto exit; | |
696 | } | |
697 | ||
698 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
699 | if (rc) { | |
700 | PROTOCOL_ERR("14.4.1.2"); | |
701 | goto exit; | |
702 | } | |
703 | ||
704 | psl_req = (struct digital_psl_req *)resp->data; | |
705 | ||
706 | if (resp->len != sizeof(struct digital_psl_req) || | |
707 | psl_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || | |
708 | psl_req->cmd != DIGITAL_CMD_PSL_REQ) { | |
709 | rc = -EIO; | |
710 | goto exit; | |
711 | } | |
712 | ||
713 | dsi = (psl_req->brs >> 3) & 0x07; | |
714 | switch (dsi) { | |
715 | case 0: | |
716 | rf_tech = NFC_DIGITAL_RF_TECH_106A; | |
717 | break; | |
718 | case 1: | |
719 | rf_tech = NFC_DIGITAL_RF_TECH_212F; | |
720 | break; | |
721 | case 2: | |
722 | rf_tech = NFC_DIGITAL_RF_TECH_424F; | |
723 | break; | |
724 | default: | |
77d84ff8 | 725 | pr_err("Unsupported dsi value %d\n", dsi); |
1c7a4c24 TE |
726 | goto exit; |
727 | } | |
728 | ||
729 | rc = digital_tg_send_psl_res(ddev, psl_req->did, rf_tech); | |
730 | ||
731 | exit: | |
732 | kfree_skb(resp); | |
733 | } | |
734 | ||
735 | static void digital_tg_send_atr_res_complete(struct nfc_digital_dev *ddev, | |
736 | void *arg, struct sk_buff *resp) | |
737 | { | |
738 | int offset; | |
739 | ||
740 | if (IS_ERR(resp)) { | |
741 | digital_poll_next_tech(ddev); | |
742 | return; | |
743 | } | |
744 | ||
745 | offset = 2; | |
746 | if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) | |
747 | offset++; | |
748 | ||
749 | if (resp->data[offset] == DIGITAL_CMD_PSL_REQ) | |
750 | digital_tg_recv_psl_req(ddev, arg, resp); | |
751 | else | |
752 | digital_tg_recv_dep_req(ddev, arg, resp); | |
753 | } | |
754 | ||
755 | static int digital_tg_send_atr_res(struct nfc_digital_dev *ddev, | |
756 | struct digital_atr_req *atr_req) | |
757 | { | |
758 | struct digital_atr_res *atr_res; | |
759 | struct sk_buff *skb; | |
760 | u8 *gb; | |
761 | size_t gb_len; | |
762 | int rc; | |
763 | ||
764 | gb = nfc_get_local_general_bytes(ddev->nfc_dev, &gb_len); | |
765 | if (!gb) | |
766 | gb_len = 0; | |
767 | ||
768 | skb = digital_skb_alloc(ddev, sizeof(struct digital_atr_res) + gb_len); | |
769 | if (!skb) | |
770 | return -ENOMEM; | |
771 | ||
772 | skb_put(skb, sizeof(struct digital_atr_res)); | |
773 | atr_res = (struct digital_atr_res *)skb->data; | |
774 | ||
775 | memset(atr_res, 0, sizeof(struct digital_atr_res)); | |
776 | ||
777 | atr_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; | |
778 | atr_res->cmd = DIGITAL_CMD_ATR_RES; | |
779 | memcpy(atr_res->nfcid3, atr_req->nfcid3, sizeof(atr_req->nfcid3)); | |
780 | atr_res->to = 8; | |
781 | atr_res->pp = DIGITAL_LR_BITS_PAYLOAD_SIZE_254B; | |
782 | if (gb_len) { | |
783 | skb_put(skb, gb_len); | |
784 | ||
785 | atr_res->pp |= DIGITAL_GB_BIT; | |
786 | memcpy(atr_res->gb, gb, gb_len); | |
787 | } | |
788 | ||
789 | digital_skb_push_dep_sod(ddev, skb); | |
790 | ||
791 | ddev->skb_add_crc(skb); | |
792 | ||
793 | rc = digital_tg_send_cmd(ddev, skb, 999, | |
794 | digital_tg_send_atr_res_complete, NULL); | |
b15829ba | 795 | if (rc) |
1c7a4c24 | 796 | kfree_skb(skb); |
1c7a4c24 TE |
797 | |
798 | return rc; | |
799 | } | |
800 | ||
801 | void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg, | |
802 | struct sk_buff *resp) | |
803 | { | |
804 | int rc; | |
805 | struct digital_atr_req *atr_req; | |
806 | size_t gb_len, min_size; | |
0529a7ad | 807 | u8 poll_tech_count; |
1c7a4c24 TE |
808 | |
809 | if (IS_ERR(resp)) { | |
810 | rc = PTR_ERR(resp); | |
811 | resp = NULL; | |
812 | goto exit; | |
813 | } | |
814 | ||
815 | if (!resp->len) { | |
816 | rc = -EIO; | |
817 | goto exit; | |
818 | } | |
819 | ||
820 | if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) { | |
821 | min_size = DIGITAL_ATR_REQ_MIN_SIZE + 2; | |
b711ad52 | 822 | digital_tg_set_rf_tech(ddev, NFC_DIGITAL_RF_TECH_106A); |
1c7a4c24 TE |
823 | } else { |
824 | min_size = DIGITAL_ATR_REQ_MIN_SIZE + 1; | |
b711ad52 | 825 | digital_tg_set_rf_tech(ddev, NFC_DIGITAL_RF_TECH_212F); |
1c7a4c24 TE |
826 | } |
827 | ||
828 | if (resp->len < min_size) { | |
829 | rc = -EIO; | |
830 | goto exit; | |
831 | } | |
832 | ||
48e10445 | 833 | ddev->curr_protocol = NFC_PROTO_NFC_DEP_MASK; |
1c7a4c24 TE |
834 | |
835 | rc = ddev->skb_check_crc(resp); | |
836 | if (rc) { | |
837 | PROTOCOL_ERR("14.4.1.6"); | |
838 | goto exit; | |
839 | } | |
840 | ||
841 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
842 | if (rc) { | |
843 | PROTOCOL_ERR("14.4.1.2"); | |
844 | goto exit; | |
845 | } | |
846 | ||
847 | atr_req = (struct digital_atr_req *)resp->data; | |
848 | ||
849 | if (atr_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || | |
05afedcb MG |
850 | atr_req->cmd != DIGITAL_CMD_ATR_REQ || |
851 | atr_req->did > DIGITAL_DID_MAX) { | |
1c7a4c24 TE |
852 | rc = -EINVAL; |
853 | goto exit; | |
854 | } | |
855 | ||
05afedcb MG |
856 | ddev->did = atr_req->did; |
857 | ||
1c7a4c24 TE |
858 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
859 | NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED); | |
860 | if (rc) | |
861 | goto exit; | |
862 | ||
863 | rc = digital_tg_send_atr_res(ddev, atr_req); | |
864 | if (rc) | |
865 | goto exit; | |
866 | ||
867 | gb_len = resp->len - sizeof(struct digital_atr_req); | |
0529a7ad MG |
868 | |
869 | poll_tech_count = ddev->poll_tech_count; | |
870 | ddev->poll_tech_count = 0; | |
871 | ||
1c7a4c24 TE |
872 | rc = nfc_tm_activated(ddev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, |
873 | NFC_COMM_PASSIVE, atr_req->gb, gb_len); | |
0529a7ad MG |
874 | if (rc) { |
875 | ddev->poll_tech_count = poll_tech_count; | |
1c7a4c24 | 876 | goto exit; |
0529a7ad | 877 | } |
1c7a4c24 TE |
878 | |
879 | rc = 0; | |
880 | exit: | |
881 | if (rc) | |
882 | digital_poll_next_tech(ddev); | |
883 | ||
884 | dev_kfree_skb(resp); | |
885 | } |