Commit | Line | Data |
---|---|---|
4b10884e 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 | ||
4b10884e TE |
18 | #include <linux/module.h> |
19 | ||
20 | #include "digital.h" | |
21 | ||
59ee2361 | 22 | #define DIGITAL_PROTO_NFCA_RF_TECH \ |
7d0911c0 | 23 | (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_NFC_DEP_MASK) |
59ee2361 | 24 | |
24734607 MG |
25 | #define DIGITAL_PROTO_NFCB_RF_TECH NFC_PROTO_ISO14443_B_MASK |
26 | ||
7d0911c0 TE |
27 | #define DIGITAL_PROTO_NFCF_RF_TECH \ |
28 | (NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK) | |
8c0695e4 | 29 | |
a381d482 MG |
30 | #define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK |
31 | ||
59ee2361 TE |
32 | struct digital_cmd { |
33 | struct list_head queue; | |
34 | ||
35 | u8 type; | |
36 | u8 pending; | |
37 | ||
38 | u16 timeout; | |
39 | struct sk_buff *req; | |
40 | struct sk_buff *resp; | |
1c7a4c24 | 41 | struct digital_tg_mdaa_params *mdaa_params; |
59ee2361 TE |
42 | |
43 | nfc_digital_cmd_complete_t cmd_cb; | |
44 | void *cb_context; | |
45 | }; | |
46 | ||
47 | struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, | |
48 | unsigned int len) | |
49 | { | |
50 | struct sk_buff *skb; | |
51 | ||
52 | skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom, | |
53 | GFP_KERNEL); | |
54 | if (skb) | |
55 | skb_reserve(skb, ddev->tx_headroom); | |
56 | ||
57 | return skb; | |
58 | } | |
59 | ||
2c66daec TE |
60 | void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, |
61 | u8 bitwise_inv, u8 msb_first) | |
62 | { | |
63 | u16 crc; | |
64 | ||
65 | crc = crc_func(init, skb->data, skb->len); | |
66 | ||
67 | if (bitwise_inv) | |
68 | crc = ~crc; | |
69 | ||
70 | if (msb_first) | |
71 | crc = __fswab16(crc); | |
72 | ||
73 | *skb_put(skb, 1) = crc & 0xFF; | |
74 | *skb_put(skb, 1) = (crc >> 8) & 0xFF; | |
75 | } | |
76 | ||
77 | int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, | |
78 | u16 crc_init, u8 bitwise_inv, u8 msb_first) | |
79 | { | |
80 | int rc; | |
81 | u16 crc; | |
82 | ||
83 | if (skb->len <= 2) | |
84 | return -EIO; | |
85 | ||
86 | crc = crc_func(crc_init, skb->data, skb->len - 2); | |
87 | ||
88 | if (bitwise_inv) | |
89 | crc = ~crc; | |
90 | ||
91 | if (msb_first) | |
92 | crc = __swab16(crc); | |
93 | ||
94 | rc = (skb->data[skb->len - 2] - (crc & 0xFF)) + | |
95 | (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF)); | |
96 | ||
97 | if (rc) | |
98 | return -EIO; | |
99 | ||
100 | skb_trim(skb, skb->len - 2); | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
59ee2361 TE |
105 | static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on) |
106 | { | |
107 | ddev->ops->switch_rf(ddev, on); | |
108 | } | |
109 | ||
110 | static inline void digital_abort_cmd(struct nfc_digital_dev *ddev) | |
111 | { | |
112 | ddev->ops->abort_cmd(ddev); | |
113 | } | |
114 | ||
115 | static void digital_wq_cmd_complete(struct work_struct *work) | |
116 | { | |
117 | struct digital_cmd *cmd; | |
118 | struct nfc_digital_dev *ddev = container_of(work, | |
119 | struct nfc_digital_dev, | |
120 | cmd_complete_work); | |
121 | ||
122 | mutex_lock(&ddev->cmd_lock); | |
123 | ||
124 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
125 | queue); | |
126 | if (!cmd) { | |
127 | mutex_unlock(&ddev->cmd_lock); | |
128 | return; | |
129 | } | |
130 | ||
131 | list_del(&cmd->queue); | |
132 | ||
133 | mutex_unlock(&ddev->cmd_lock); | |
134 | ||
135 | if (!IS_ERR(cmd->resp)) | |
136 | print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1, | |
137 | cmd->resp->data, cmd->resp->len, false); | |
138 | ||
139 | cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp); | |
140 | ||
1c7a4c24 | 141 | kfree(cmd->mdaa_params); |
59ee2361 TE |
142 | kfree(cmd); |
143 | ||
144 | schedule_work(&ddev->cmd_work); | |
145 | } | |
146 | ||
147 | static void digital_send_cmd_complete(struct nfc_digital_dev *ddev, | |
148 | void *arg, struct sk_buff *resp) | |
149 | { | |
150 | struct digital_cmd *cmd = arg; | |
151 | ||
152 | cmd->resp = resp; | |
153 | ||
154 | schedule_work(&ddev->cmd_complete_work); | |
155 | } | |
156 | ||
157 | static void digital_wq_cmd(struct work_struct *work) | |
158 | { | |
159 | int rc; | |
160 | struct digital_cmd *cmd; | |
1c7a4c24 | 161 | struct digital_tg_mdaa_params *params; |
59ee2361 TE |
162 | struct nfc_digital_dev *ddev = container_of(work, |
163 | struct nfc_digital_dev, | |
164 | cmd_work); | |
165 | ||
166 | mutex_lock(&ddev->cmd_lock); | |
167 | ||
168 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
169 | queue); | |
170 | if (!cmd || cmd->pending) { | |
171 | mutex_unlock(&ddev->cmd_lock); | |
172 | return; | |
173 | } | |
174 | ||
175 | mutex_unlock(&ddev->cmd_lock); | |
176 | ||
177 | if (cmd->req) | |
178 | print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1, | |
179 | cmd->req->data, cmd->req->len, false); | |
180 | ||
181 | switch (cmd->type) { | |
182 | case DIGITAL_CMD_IN_SEND: | |
183 | rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout, | |
184 | digital_send_cmd_complete, cmd); | |
185 | break; | |
1c7a4c24 TE |
186 | |
187 | case DIGITAL_CMD_TG_SEND: | |
188 | rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout, | |
189 | digital_send_cmd_complete, cmd); | |
190 | break; | |
191 | ||
192 | case DIGITAL_CMD_TG_LISTEN: | |
193 | rc = ddev->ops->tg_listen(ddev, cmd->timeout, | |
194 | digital_send_cmd_complete, cmd); | |
195 | break; | |
196 | ||
197 | case DIGITAL_CMD_TG_LISTEN_MDAA: | |
198 | params = cmd->mdaa_params; | |
199 | ||
200 | rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout, | |
201 | digital_send_cmd_complete, cmd); | |
202 | break; | |
203 | ||
59ee2361 | 204 | default: |
26042530 | 205 | pr_err("Unknown cmd type %d\n", cmd->type); |
59ee2361 TE |
206 | return; |
207 | } | |
208 | ||
209 | if (!rc) | |
210 | return; | |
211 | ||
26042530 | 212 | pr_err("in_send_command returned err %d\n", rc); |
59ee2361 TE |
213 | |
214 | mutex_lock(&ddev->cmd_lock); | |
215 | list_del(&cmd->queue); | |
216 | mutex_unlock(&ddev->cmd_lock); | |
217 | ||
218 | kfree_skb(cmd->req); | |
1c7a4c24 | 219 | kfree(cmd->mdaa_params); |
59ee2361 TE |
220 | kfree(cmd); |
221 | ||
222 | schedule_work(&ddev->cmd_work); | |
223 | } | |
224 | ||
225 | int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, | |
1c7a4c24 TE |
226 | struct sk_buff *skb, struct digital_tg_mdaa_params *params, |
227 | u16 timeout, nfc_digital_cmd_complete_t cmd_cb, | |
228 | void *cb_context) | |
59ee2361 TE |
229 | { |
230 | struct digital_cmd *cmd; | |
231 | ||
232 | cmd = kzalloc(sizeof(struct digital_cmd), GFP_KERNEL); | |
233 | if (!cmd) | |
234 | return -ENOMEM; | |
235 | ||
236 | cmd->type = cmd_type; | |
237 | cmd->timeout = timeout; | |
238 | cmd->req = skb; | |
1c7a4c24 | 239 | cmd->mdaa_params = params; |
59ee2361 TE |
240 | cmd->cmd_cb = cmd_cb; |
241 | cmd->cb_context = cb_context; | |
242 | INIT_LIST_HEAD(&cmd->queue); | |
243 | ||
244 | mutex_lock(&ddev->cmd_lock); | |
245 | list_add_tail(&cmd->queue, &ddev->cmd_queue); | |
246 | mutex_unlock(&ddev->cmd_lock); | |
247 | ||
248 | schedule_work(&ddev->cmd_work); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param) | |
254 | { | |
255 | int rc; | |
256 | ||
257 | rc = ddev->ops->in_configure_hw(ddev, type, param); | |
258 | if (rc) | |
26042530 | 259 | pr_err("in_configure_hw failed: %d\n", rc); |
59ee2361 TE |
260 | |
261 | return rc; | |
262 | } | |
263 | ||
1c7a4c24 TE |
264 | int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param) |
265 | { | |
266 | int rc; | |
267 | ||
268 | rc = ddev->ops->tg_configure_hw(ddev, type, param); | |
269 | if (rc) | |
26042530 | 270 | pr_err("tg_configure_hw failed: %d\n", rc); |
1c7a4c24 TE |
271 | |
272 | return rc; | |
273 | } | |
274 | ||
275 | static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech) | |
276 | { | |
277 | struct digital_tg_mdaa_params *params; | |
278 | ||
279 | params = kzalloc(sizeof(struct digital_tg_mdaa_params), GFP_KERNEL); | |
280 | if (!params) | |
281 | return -ENOMEM; | |
282 | ||
283 | params->sens_res = DIGITAL_SENS_RES_NFC_DEP; | |
284 | get_random_bytes(params->nfcid1, sizeof(params->nfcid1)); | |
285 | params->sel_res = DIGITAL_SEL_RES_NFC_DEP; | |
286 | ||
287 | params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
288 | params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
289 | get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); | |
290 | params->sc = DIGITAL_SENSF_FELICA_SC; | |
291 | ||
292 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params, | |
293 | 500, digital_tg_recv_atr_req, NULL); | |
294 | } | |
295 | ||
2c66daec TE |
296 | int digital_target_found(struct nfc_digital_dev *ddev, |
297 | struct nfc_target *target, u8 protocol) | |
298 | { | |
299 | int rc; | |
300 | u8 framing; | |
301 | u8 rf_tech; | |
302 | int (*check_crc)(struct sk_buff *skb); | |
303 | void (*add_crc)(struct sk_buff *skb); | |
304 | ||
305 | rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech; | |
306 | ||
307 | switch (protocol) { | |
308 | case NFC_PROTO_JEWEL: | |
309 | framing = NFC_DIGITAL_FRAMING_NFCA_T1T; | |
310 | check_crc = digital_skb_check_crc_b; | |
311 | add_crc = digital_skb_add_crc_b; | |
312 | break; | |
313 | ||
314 | case NFC_PROTO_MIFARE: | |
315 | framing = NFC_DIGITAL_FRAMING_NFCA_T2T; | |
316 | check_crc = digital_skb_check_crc_a; | |
317 | add_crc = digital_skb_add_crc_a; | |
318 | break; | |
319 | ||
8c0695e4 TE |
320 | case NFC_PROTO_FELICA: |
321 | framing = NFC_DIGITAL_FRAMING_NFCF_T3T; | |
322 | check_crc = digital_skb_check_crc_f; | |
323 | add_crc = digital_skb_add_crc_f; | |
324 | break; | |
325 | ||
7d0911c0 TE |
326 | case NFC_PROTO_NFC_DEP: |
327 | if (rf_tech == NFC_DIGITAL_RF_TECH_106A) { | |
328 | framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP; | |
329 | check_crc = digital_skb_check_crc_a; | |
330 | add_crc = digital_skb_add_crc_a; | |
331 | } else { | |
332 | framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP; | |
333 | check_crc = digital_skb_check_crc_f; | |
334 | add_crc = digital_skb_add_crc_f; | |
335 | } | |
336 | break; | |
337 | ||
a381d482 | 338 | case NFC_PROTO_ISO15693: |
ceeee42d | 339 | framing = NFC_DIGITAL_FRAMING_ISO15693_T5T; |
a381d482 MG |
340 | check_crc = digital_skb_check_crc_b; |
341 | add_crc = digital_skb_add_crc_b; | |
564af14e | 342 | break; |
12e3d241 TE |
343 | |
344 | case NFC_PROTO_ISO14443: | |
345 | framing = NFC_DIGITAL_FRAMING_NFCA_T4T; | |
346 | check_crc = digital_skb_check_crc_a; | |
347 | add_crc = digital_skb_add_crc_a; | |
a381d482 MG |
348 | break; |
349 | ||
24734607 MG |
350 | case NFC_PROTO_ISO14443_B: |
351 | framing = NFC_DIGITAL_FRAMING_NFCB_T4T; | |
352 | check_crc = digital_skb_check_crc_b; | |
353 | add_crc = digital_skb_add_crc_b; | |
354 | break; | |
355 | ||
2c66daec | 356 | default: |
26042530 | 357 | pr_err("Invalid protocol %d\n", protocol); |
2c66daec TE |
358 | return -EINVAL; |
359 | } | |
360 | ||
26042530 | 361 | pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol); |
2c66daec TE |
362 | |
363 | ddev->curr_rf_tech = rf_tech; | |
2c66daec TE |
364 | |
365 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
366 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
367 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
368 | } else { | |
369 | ddev->skb_add_crc = add_crc; | |
370 | ddev->skb_check_crc = check_crc; | |
371 | } | |
372 | ||
373 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing); | |
374 | if (rc) | |
375 | return rc; | |
376 | ||
377 | target->supported_protocols = (1 << protocol); | |
378 | rc = nfc_targets_found(ddev->nfc_dev, target, 1); | |
379 | if (rc) | |
380 | return rc; | |
381 | ||
382 | ddev->poll_tech_count = 0; | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
59ee2361 TE |
387 | void digital_poll_next_tech(struct nfc_digital_dev *ddev) |
388 | { | |
389 | digital_switch_rf(ddev, 0); | |
390 | ||
391 | mutex_lock(&ddev->poll_lock); | |
392 | ||
393 | if (!ddev->poll_tech_count) { | |
394 | mutex_unlock(&ddev->poll_lock); | |
395 | return; | |
396 | } | |
397 | ||
398 | ddev->poll_tech_index = (ddev->poll_tech_index + 1) % | |
399 | ddev->poll_tech_count; | |
400 | ||
401 | mutex_unlock(&ddev->poll_lock); | |
402 | ||
403 | schedule_work(&ddev->poll_work); | |
404 | } | |
405 | ||
406 | static void digital_wq_poll(struct work_struct *work) | |
407 | { | |
408 | int rc; | |
409 | struct digital_poll_tech *poll_tech; | |
410 | struct nfc_digital_dev *ddev = container_of(work, | |
411 | struct nfc_digital_dev, | |
412 | poll_work); | |
413 | mutex_lock(&ddev->poll_lock); | |
414 | ||
415 | if (!ddev->poll_tech_count) { | |
416 | mutex_unlock(&ddev->poll_lock); | |
417 | return; | |
418 | } | |
419 | ||
420 | poll_tech = &ddev->poll_techs[ddev->poll_tech_index]; | |
421 | ||
422 | mutex_unlock(&ddev->poll_lock); | |
423 | ||
424 | rc = poll_tech->poll_func(ddev, poll_tech->rf_tech); | |
425 | if (rc) | |
426 | digital_poll_next_tech(ddev); | |
427 | } | |
428 | ||
429 | static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech, | |
430 | digital_poll_t poll_func) | |
431 | { | |
432 | struct digital_poll_tech *poll_tech; | |
433 | ||
434 | if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX) | |
435 | return; | |
436 | ||
437 | poll_tech = &ddev->poll_techs[ddev->poll_tech_count++]; | |
438 | ||
439 | poll_tech->rf_tech = rf_tech; | |
440 | poll_tech->poll_func = poll_func; | |
441 | } | |
442 | ||
443 | /** | |
444 | * start_poll operation | |
445 | * | |
446 | * For every supported protocol, the corresponding polling function is added | |
447 | * to the table of polling technologies (ddev->poll_techs[]) using | |
448 | * digital_add_poll_tech(). | |
449 | * When a polling function fails (by timeout or protocol error) the next one is | |
450 | * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work). | |
451 | */ | |
4b10884e TE |
452 | static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols, |
453 | __u32 tm_protocols) | |
454 | { | |
59ee2361 TE |
455 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
456 | u32 matching_im_protocols, matching_tm_protocols; | |
457 | ||
26042530 | 458 | pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols, |
c5da0e4a | 459 | tm_protocols, ddev->protocols); |
59ee2361 TE |
460 | |
461 | matching_im_protocols = ddev->protocols & im_protocols; | |
462 | matching_tm_protocols = ddev->protocols & tm_protocols; | |
463 | ||
464 | if (!matching_im_protocols && !matching_tm_protocols) { | |
26042530 | 465 | pr_err("Unknown protocol\n"); |
59ee2361 TE |
466 | return -EINVAL; |
467 | } | |
468 | ||
469 | if (ddev->poll_tech_count) { | |
26042530 | 470 | pr_err("Already polling\n"); |
59ee2361 TE |
471 | return -EBUSY; |
472 | } | |
473 | ||
474 | if (ddev->curr_protocol) { | |
26042530 | 475 | pr_err("A target is already active\n"); |
59ee2361 TE |
476 | return -EBUSY; |
477 | } | |
478 | ||
479 | ddev->poll_tech_count = 0; | |
480 | ddev->poll_tech_index = 0; | |
481 | ||
482 | if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH) | |
483 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
484 | digital_in_send_sens_req); | |
485 | ||
24734607 MG |
486 | if (matching_im_protocols & DIGITAL_PROTO_NFCB_RF_TECH) |
487 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106B, | |
488 | digital_in_send_sensb_req); | |
489 | ||
4f913d46 | 490 | if (matching_im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) { |
8c0695e4 TE |
491 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, |
492 | digital_in_send_sensf_req); | |
493 | ||
494 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
495 | digital_in_send_sensf_req); | |
496 | } | |
497 | ||
a381d482 MG |
498 | if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH) |
499 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693, | |
500 | digital_in_send_iso15693_inv_req); | |
501 | ||
4f913d46 | 502 | if (matching_tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
1c7a4c24 TE |
503 | if (ddev->ops->tg_listen_mdaa) { |
504 | digital_add_poll_tech(ddev, 0, | |
505 | digital_tg_listen_mdaa); | |
506 | } else { | |
507 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
508 | digital_tg_listen_nfca); | |
509 | ||
510 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, | |
511 | digital_tg_listen_nfcf); | |
512 | ||
513 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
514 | digital_tg_listen_nfcf); | |
515 | } | |
516 | } | |
517 | ||
59ee2361 | 518 | if (!ddev->poll_tech_count) { |
26042530 | 519 | pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n", |
59ee2361 TE |
520 | matching_im_protocols, matching_tm_protocols); |
521 | return -EINVAL; | |
522 | } | |
523 | ||
524 | schedule_work(&ddev->poll_work); | |
525 | ||
526 | return 0; | |
4b10884e TE |
527 | } |
528 | ||
529 | static void digital_stop_poll(struct nfc_dev *nfc_dev) | |
530 | { | |
59ee2361 TE |
531 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
532 | ||
533 | mutex_lock(&ddev->poll_lock); | |
534 | ||
535 | if (!ddev->poll_tech_count) { | |
26042530 | 536 | pr_err("Polling operation was not running\n"); |
59ee2361 TE |
537 | mutex_unlock(&ddev->poll_lock); |
538 | return; | |
539 | } | |
540 | ||
541 | ddev->poll_tech_count = 0; | |
542 | ||
543 | mutex_unlock(&ddev->poll_lock); | |
544 | ||
545 | cancel_work_sync(&ddev->poll_work); | |
546 | ||
547 | digital_abort_cmd(ddev); | |
4b10884e TE |
548 | } |
549 | ||
550 | static int digital_dev_up(struct nfc_dev *nfc_dev) | |
551 | { | |
59ee2361 TE |
552 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
553 | ||
554 | digital_switch_rf(ddev, 1); | |
555 | ||
556 | return 0; | |
4b10884e TE |
557 | } |
558 | ||
559 | static int digital_dev_down(struct nfc_dev *nfc_dev) | |
560 | { | |
59ee2361 TE |
561 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
562 | ||
563 | digital_switch_rf(ddev, 0); | |
564 | ||
565 | return 0; | |
4b10884e TE |
566 | } |
567 | ||
568 | static int digital_dep_link_up(struct nfc_dev *nfc_dev, | |
569 | struct nfc_target *target, | |
570 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
571 | { | |
7d0911c0 | 572 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
48e10445 TE |
573 | int rc; |
574 | ||
575 | rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len); | |
7d0911c0 | 576 | |
48e10445 TE |
577 | if (!rc) |
578 | ddev->curr_protocol = NFC_PROTO_NFC_DEP; | |
579 | ||
580 | return rc; | |
4b10884e TE |
581 | } |
582 | ||
583 | static int digital_dep_link_down(struct nfc_dev *nfc_dev) | |
584 | { | |
7d0911c0 TE |
585 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
586 | ||
587 | ddev->curr_protocol = 0; | |
588 | ||
589 | return 0; | |
4b10884e TE |
590 | } |
591 | ||
592 | static int digital_activate_target(struct nfc_dev *nfc_dev, | |
593 | struct nfc_target *target, __u32 protocol) | |
594 | { | |
48e10445 TE |
595 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
596 | ||
597 | if (ddev->poll_tech_count) { | |
598 | pr_err("Can't activate a target while polling\n"); | |
599 | return -EBUSY; | |
600 | } | |
601 | ||
602 | if (ddev->curr_protocol) { | |
603 | pr_err("A target is already active\n"); | |
604 | return -EBUSY; | |
605 | } | |
606 | ||
607 | ddev->curr_protocol = protocol; | |
608 | ||
59ee2361 | 609 | return 0; |
4b10884e TE |
610 | } |
611 | ||
612 | static void digital_deactivate_target(struct nfc_dev *nfc_dev, | |
613 | struct nfc_target *target) | |
614 | { | |
59ee2361 TE |
615 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
616 | ||
48e10445 TE |
617 | if (!ddev->curr_protocol) { |
618 | pr_err("No active target\n"); | |
619 | return; | |
620 | } | |
621 | ||
59ee2361 | 622 | ddev->curr_protocol = 0; |
4b10884e TE |
623 | } |
624 | ||
625 | static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb) | |
626 | { | |
1c7a4c24 TE |
627 | struct nfc_digital_dev *ddev = nfc_get_drvdata(dev); |
628 | ||
629 | return digital_tg_send_dep_res(ddev, skb); | |
4b10884e TE |
630 | } |
631 | ||
2c66daec TE |
632 | static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg, |
633 | struct sk_buff *resp) | |
634 | { | |
635 | struct digital_data_exch *data_exch = arg; | |
636 | int rc; | |
637 | ||
638 | if (IS_ERR(resp)) { | |
639 | rc = PTR_ERR(resp); | |
c813007f | 640 | resp = NULL; |
2c66daec TE |
641 | goto done; |
642 | } | |
643 | ||
c813007f | 644 | if (ddev->curr_protocol == NFC_PROTO_MIFARE) { |
2c66daec | 645 | rc = digital_in_recv_mifare_res(resp); |
c813007f TE |
646 | /* crc check is done in digital_in_recv_mifare_res() */ |
647 | goto done; | |
648 | } | |
649 | ||
24734607 MG |
650 | if ((ddev->curr_protocol == NFC_PROTO_ISO14443) || |
651 | (ddev->curr_protocol == NFC_PROTO_ISO14443_B)) { | |
c813007f TE |
652 | rc = digital_in_iso_dep_pull_sod(ddev, resp); |
653 | if (rc) | |
654 | goto done; | |
655 | } | |
656 | ||
657 | rc = ddev->skb_check_crc(resp); | |
2c66daec | 658 | |
c813007f | 659 | done: |
2c66daec TE |
660 | if (rc) { |
661 | kfree_skb(resp); | |
662 | resp = NULL; | |
663 | } | |
664 | ||
2c66daec TE |
665 | data_exch->cb(data_exch->cb_context, resp, rc); |
666 | ||
667 | kfree(data_exch); | |
668 | } | |
669 | ||
4b10884e TE |
670 | static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target, |
671 | struct sk_buff *skb, data_exchange_cb_t cb, | |
672 | void *cb_context) | |
673 | { | |
2c66daec TE |
674 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
675 | struct digital_data_exch *data_exch; | |
c813007f | 676 | int rc; |
2c66daec TE |
677 | |
678 | data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL); | |
679 | if (!data_exch) { | |
26042530 | 680 | pr_err("Failed to allocate data_exch struct\n"); |
2c66daec TE |
681 | return -ENOMEM; |
682 | } | |
683 | ||
684 | data_exch->cb = cb; | |
685 | data_exch->cb_context = cb_context; | |
686 | ||
6ea7398d TE |
687 | if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) { |
688 | rc = digital_in_send_dep_req(ddev, target, skb, data_exch); | |
689 | goto exit; | |
690 | } | |
7d0911c0 | 691 | |
24734607 MG |
692 | if ((ddev->curr_protocol == NFC_PROTO_ISO14443) || |
693 | (ddev->curr_protocol == NFC_PROTO_ISO14443_B)) { | |
c813007f TE |
694 | rc = digital_in_iso_dep_push_sod(ddev, skb); |
695 | if (rc) | |
6ea7398d | 696 | goto exit; |
c813007f TE |
697 | } |
698 | ||
2c66daec TE |
699 | ddev->skb_add_crc(skb); |
700 | ||
6ea7398d TE |
701 | rc = digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete, |
702 | data_exch); | |
703 | ||
704 | exit: | |
705 | if (rc) | |
706 | kfree(data_exch); | |
707 | ||
708 | return rc; | |
4b10884e TE |
709 | } |
710 | ||
711 | static struct nfc_ops digital_nfc_ops = { | |
712 | .dev_up = digital_dev_up, | |
713 | .dev_down = digital_dev_down, | |
714 | .start_poll = digital_start_poll, | |
715 | .stop_poll = digital_stop_poll, | |
716 | .dep_link_up = digital_dep_link_up, | |
717 | .dep_link_down = digital_dep_link_down, | |
718 | .activate_target = digital_activate_target, | |
719 | .deactivate_target = digital_deactivate_target, | |
720 | .tm_send = digital_tg_send, | |
721 | .im_transceive = digital_in_send, | |
722 | }; | |
723 | ||
724 | struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, | |
725 | __u32 supported_protocols, | |
726 | __u32 driver_capabilities, | |
727 | int tx_headroom, int tx_tailroom) | |
728 | { | |
729 | struct nfc_digital_dev *ddev; | |
730 | ||
731 | if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen || | |
732 | !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd || | |
733 | !ops->switch_rf) | |
734 | return NULL; | |
735 | ||
736 | ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL); | |
26042530 | 737 | if (!ddev) |
4b10884e | 738 | return NULL; |
4b10884e TE |
739 | |
740 | ddev->driver_capabilities = driver_capabilities; | |
741 | ddev->ops = ops; | |
742 | ||
59ee2361 TE |
743 | mutex_init(&ddev->cmd_lock); |
744 | INIT_LIST_HEAD(&ddev->cmd_queue); | |
745 | ||
746 | INIT_WORK(&ddev->cmd_work, digital_wq_cmd); | |
747 | INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete); | |
748 | ||
749 | mutex_init(&ddev->poll_lock); | |
750 | INIT_WORK(&ddev->poll_work, digital_wq_poll); | |
751 | ||
752 | if (supported_protocols & NFC_PROTO_JEWEL_MASK) | |
753 | ddev->protocols |= NFC_PROTO_JEWEL_MASK; | |
754 | if (supported_protocols & NFC_PROTO_MIFARE_MASK) | |
755 | ddev->protocols |= NFC_PROTO_MIFARE_MASK; | |
8c0695e4 TE |
756 | if (supported_protocols & NFC_PROTO_FELICA_MASK) |
757 | ddev->protocols |= NFC_PROTO_FELICA_MASK; | |
7d0911c0 TE |
758 | if (supported_protocols & NFC_PROTO_NFC_DEP_MASK) |
759 | ddev->protocols |= NFC_PROTO_NFC_DEP_MASK; | |
a381d482 MG |
760 | if (supported_protocols & NFC_PROTO_ISO15693_MASK) |
761 | ddev->protocols |= NFC_PROTO_ISO15693_MASK; | |
12e3d241 TE |
762 | if (supported_protocols & NFC_PROTO_ISO14443_MASK) |
763 | ddev->protocols |= NFC_PROTO_ISO14443_MASK; | |
24734607 MG |
764 | if (supported_protocols & NFC_PROTO_ISO14443_B_MASK) |
765 | ddev->protocols |= NFC_PROTO_ISO14443_B_MASK; | |
59ee2361 TE |
766 | |
767 | ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN; | |
768 | ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN; | |
4b10884e TE |
769 | |
770 | ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols, | |
771 | ddev->tx_headroom, | |
772 | ddev->tx_tailroom); | |
773 | if (!ddev->nfc_dev) { | |
26042530 | 774 | pr_err("nfc_allocate_device failed\n"); |
4b10884e TE |
775 | goto free_dev; |
776 | } | |
777 | ||
778 | nfc_set_drvdata(ddev->nfc_dev, ddev); | |
779 | ||
780 | return ddev; | |
781 | ||
782 | free_dev: | |
783 | kfree(ddev); | |
784 | ||
785 | return NULL; | |
786 | } | |
787 | EXPORT_SYMBOL(nfc_digital_allocate_device); | |
788 | ||
789 | void nfc_digital_free_device(struct nfc_digital_dev *ddev) | |
790 | { | |
791 | nfc_free_device(ddev->nfc_dev); | |
4b10884e TE |
792 | kfree(ddev); |
793 | } | |
794 | EXPORT_SYMBOL(nfc_digital_free_device); | |
795 | ||
796 | int nfc_digital_register_device(struct nfc_digital_dev *ddev) | |
797 | { | |
798 | return nfc_register_device(ddev->nfc_dev); | |
799 | } | |
800 | EXPORT_SYMBOL(nfc_digital_register_device); | |
801 | ||
802 | void nfc_digital_unregister_device(struct nfc_digital_dev *ddev) | |
803 | { | |
59ee2361 TE |
804 | struct digital_cmd *cmd, *n; |
805 | ||
4b10884e | 806 | nfc_unregister_device(ddev->nfc_dev); |
59ee2361 TE |
807 | |
808 | mutex_lock(&ddev->poll_lock); | |
809 | ddev->poll_tech_count = 0; | |
810 | mutex_unlock(&ddev->poll_lock); | |
811 | ||
812 | cancel_work_sync(&ddev->poll_work); | |
813 | cancel_work_sync(&ddev->cmd_work); | |
814 | cancel_work_sync(&ddev->cmd_complete_work); | |
815 | ||
816 | list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) { | |
817 | list_del(&cmd->queue); | |
1c7a4c24 | 818 | kfree(cmd->mdaa_params); |
59ee2361 TE |
819 | kfree(cmd); |
820 | } | |
4b10884e TE |
821 | } |
822 | EXPORT_SYMBOL(nfc_digital_unregister_device); | |
823 | ||
824 | MODULE_LICENSE("GPL"); |