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