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 | |
7d0911c0 TE |
25 | #define DIGITAL_PROTO_NFCF_RF_TECH \ |
26 | (NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK) | |
8c0695e4 | 27 | |
a381d482 MG |
28 | #define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK |
29 | ||
59ee2361 TE |
30 | struct digital_cmd { |
31 | struct list_head queue; | |
32 | ||
33 | u8 type; | |
34 | u8 pending; | |
35 | ||
36 | u16 timeout; | |
37 | struct sk_buff *req; | |
38 | struct sk_buff *resp; | |
1c7a4c24 | 39 | struct digital_tg_mdaa_params *mdaa_params; |
59ee2361 TE |
40 | |
41 | nfc_digital_cmd_complete_t cmd_cb; | |
42 | void *cb_context; | |
43 | }; | |
44 | ||
45 | struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, | |
46 | unsigned int len) | |
47 | { | |
48 | struct sk_buff *skb; | |
49 | ||
50 | skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom, | |
51 | GFP_KERNEL); | |
52 | if (skb) | |
53 | skb_reserve(skb, ddev->tx_headroom); | |
54 | ||
55 | return skb; | |
56 | } | |
57 | ||
2c66daec TE |
58 | void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, |
59 | u8 bitwise_inv, u8 msb_first) | |
60 | { | |
61 | u16 crc; | |
62 | ||
63 | crc = crc_func(init, skb->data, skb->len); | |
64 | ||
65 | if (bitwise_inv) | |
66 | crc = ~crc; | |
67 | ||
68 | if (msb_first) | |
69 | crc = __fswab16(crc); | |
70 | ||
71 | *skb_put(skb, 1) = crc & 0xFF; | |
72 | *skb_put(skb, 1) = (crc >> 8) & 0xFF; | |
73 | } | |
74 | ||
75 | int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, | |
76 | u16 crc_init, u8 bitwise_inv, u8 msb_first) | |
77 | { | |
78 | int rc; | |
79 | u16 crc; | |
80 | ||
81 | if (skb->len <= 2) | |
82 | return -EIO; | |
83 | ||
84 | crc = crc_func(crc_init, skb->data, skb->len - 2); | |
85 | ||
86 | if (bitwise_inv) | |
87 | crc = ~crc; | |
88 | ||
89 | if (msb_first) | |
90 | crc = __swab16(crc); | |
91 | ||
92 | rc = (skb->data[skb->len - 2] - (crc & 0xFF)) + | |
93 | (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF)); | |
94 | ||
95 | if (rc) | |
96 | return -EIO; | |
97 | ||
98 | skb_trim(skb, skb->len - 2); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
59ee2361 TE |
103 | static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on) |
104 | { | |
105 | ddev->ops->switch_rf(ddev, on); | |
106 | } | |
107 | ||
108 | static inline void digital_abort_cmd(struct nfc_digital_dev *ddev) | |
109 | { | |
110 | ddev->ops->abort_cmd(ddev); | |
111 | } | |
112 | ||
113 | static void digital_wq_cmd_complete(struct work_struct *work) | |
114 | { | |
115 | struct digital_cmd *cmd; | |
116 | struct nfc_digital_dev *ddev = container_of(work, | |
117 | struct nfc_digital_dev, | |
118 | cmd_complete_work); | |
119 | ||
120 | mutex_lock(&ddev->cmd_lock); | |
121 | ||
122 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
123 | queue); | |
124 | if (!cmd) { | |
125 | mutex_unlock(&ddev->cmd_lock); | |
126 | return; | |
127 | } | |
128 | ||
129 | list_del(&cmd->queue); | |
130 | ||
131 | mutex_unlock(&ddev->cmd_lock); | |
132 | ||
133 | if (!IS_ERR(cmd->resp)) | |
134 | print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1, | |
135 | cmd->resp->data, cmd->resp->len, false); | |
136 | ||
137 | cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp); | |
138 | ||
1c7a4c24 | 139 | kfree(cmd->mdaa_params); |
59ee2361 TE |
140 | kfree(cmd); |
141 | ||
142 | schedule_work(&ddev->cmd_work); | |
143 | } | |
144 | ||
145 | static void digital_send_cmd_complete(struct nfc_digital_dev *ddev, | |
146 | void *arg, struct sk_buff *resp) | |
147 | { | |
148 | struct digital_cmd *cmd = arg; | |
149 | ||
150 | cmd->resp = resp; | |
151 | ||
152 | schedule_work(&ddev->cmd_complete_work); | |
153 | } | |
154 | ||
155 | static void digital_wq_cmd(struct work_struct *work) | |
156 | { | |
157 | int rc; | |
158 | struct digital_cmd *cmd; | |
1c7a4c24 | 159 | struct digital_tg_mdaa_params *params; |
59ee2361 TE |
160 | struct nfc_digital_dev *ddev = container_of(work, |
161 | struct nfc_digital_dev, | |
162 | cmd_work); | |
163 | ||
164 | mutex_lock(&ddev->cmd_lock); | |
165 | ||
166 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
167 | queue); | |
168 | if (!cmd || cmd->pending) { | |
169 | mutex_unlock(&ddev->cmd_lock); | |
170 | return; | |
171 | } | |
172 | ||
173 | mutex_unlock(&ddev->cmd_lock); | |
174 | ||
175 | if (cmd->req) | |
176 | print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1, | |
177 | cmd->req->data, cmd->req->len, false); | |
178 | ||
179 | switch (cmd->type) { | |
180 | case DIGITAL_CMD_IN_SEND: | |
181 | rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout, | |
182 | digital_send_cmd_complete, cmd); | |
183 | break; | |
1c7a4c24 TE |
184 | |
185 | case DIGITAL_CMD_TG_SEND: | |
186 | rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout, | |
187 | digital_send_cmd_complete, cmd); | |
188 | break; | |
189 | ||
190 | case DIGITAL_CMD_TG_LISTEN: | |
191 | rc = ddev->ops->tg_listen(ddev, cmd->timeout, | |
192 | digital_send_cmd_complete, cmd); | |
193 | break; | |
194 | ||
195 | case DIGITAL_CMD_TG_LISTEN_MDAA: | |
196 | params = cmd->mdaa_params; | |
197 | ||
198 | rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout, | |
199 | digital_send_cmd_complete, cmd); | |
200 | break; | |
201 | ||
59ee2361 | 202 | default: |
26042530 | 203 | pr_err("Unknown cmd type %d\n", cmd->type); |
59ee2361 TE |
204 | return; |
205 | } | |
206 | ||
207 | if (!rc) | |
208 | return; | |
209 | ||
26042530 | 210 | pr_err("in_send_command returned err %d\n", rc); |
59ee2361 TE |
211 | |
212 | mutex_lock(&ddev->cmd_lock); | |
213 | list_del(&cmd->queue); | |
214 | mutex_unlock(&ddev->cmd_lock); | |
215 | ||
216 | kfree_skb(cmd->req); | |
1c7a4c24 | 217 | kfree(cmd->mdaa_params); |
59ee2361 TE |
218 | kfree(cmd); |
219 | ||
220 | schedule_work(&ddev->cmd_work); | |
221 | } | |
222 | ||
223 | int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, | |
1c7a4c24 TE |
224 | struct sk_buff *skb, struct digital_tg_mdaa_params *params, |
225 | u16 timeout, nfc_digital_cmd_complete_t cmd_cb, | |
226 | void *cb_context) | |
59ee2361 TE |
227 | { |
228 | struct digital_cmd *cmd; | |
229 | ||
230 | cmd = kzalloc(sizeof(struct digital_cmd), GFP_KERNEL); | |
231 | if (!cmd) | |
232 | return -ENOMEM; | |
233 | ||
234 | cmd->type = cmd_type; | |
235 | cmd->timeout = timeout; | |
236 | cmd->req = skb; | |
1c7a4c24 | 237 | cmd->mdaa_params = params; |
59ee2361 TE |
238 | cmd->cmd_cb = cmd_cb; |
239 | cmd->cb_context = cb_context; | |
240 | INIT_LIST_HEAD(&cmd->queue); | |
241 | ||
242 | mutex_lock(&ddev->cmd_lock); | |
243 | list_add_tail(&cmd->queue, &ddev->cmd_queue); | |
244 | mutex_unlock(&ddev->cmd_lock); | |
245 | ||
246 | schedule_work(&ddev->cmd_work); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param) | |
252 | { | |
253 | int rc; | |
254 | ||
255 | rc = ddev->ops->in_configure_hw(ddev, type, param); | |
256 | if (rc) | |
26042530 | 257 | pr_err("in_configure_hw failed: %d\n", rc); |
59ee2361 TE |
258 | |
259 | return rc; | |
260 | } | |
261 | ||
1c7a4c24 TE |
262 | int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param) |
263 | { | |
264 | int rc; | |
265 | ||
266 | rc = ddev->ops->tg_configure_hw(ddev, type, param); | |
267 | if (rc) | |
26042530 | 268 | pr_err("tg_configure_hw failed: %d\n", rc); |
1c7a4c24 TE |
269 | |
270 | return rc; | |
271 | } | |
272 | ||
273 | static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech) | |
274 | { | |
275 | struct digital_tg_mdaa_params *params; | |
276 | ||
277 | params = kzalloc(sizeof(struct digital_tg_mdaa_params), GFP_KERNEL); | |
278 | if (!params) | |
279 | return -ENOMEM; | |
280 | ||
281 | params->sens_res = DIGITAL_SENS_RES_NFC_DEP; | |
282 | get_random_bytes(params->nfcid1, sizeof(params->nfcid1)); | |
283 | params->sel_res = DIGITAL_SEL_RES_NFC_DEP; | |
284 | ||
285 | params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
286 | params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
287 | get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); | |
288 | params->sc = DIGITAL_SENSF_FELICA_SC; | |
289 | ||
290 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params, | |
291 | 500, digital_tg_recv_atr_req, NULL); | |
292 | } | |
293 | ||
2c66daec TE |
294 | int digital_target_found(struct nfc_digital_dev *ddev, |
295 | struct nfc_target *target, u8 protocol) | |
296 | { | |
297 | int rc; | |
298 | u8 framing; | |
299 | u8 rf_tech; | |
300 | int (*check_crc)(struct sk_buff *skb); | |
301 | void (*add_crc)(struct sk_buff *skb); | |
302 | ||
303 | rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech; | |
304 | ||
305 | switch (protocol) { | |
306 | case NFC_PROTO_JEWEL: | |
307 | framing = NFC_DIGITAL_FRAMING_NFCA_T1T; | |
308 | check_crc = digital_skb_check_crc_b; | |
309 | add_crc = digital_skb_add_crc_b; | |
310 | break; | |
311 | ||
312 | case NFC_PROTO_MIFARE: | |
313 | framing = NFC_DIGITAL_FRAMING_NFCA_T2T; | |
314 | check_crc = digital_skb_check_crc_a; | |
315 | add_crc = digital_skb_add_crc_a; | |
316 | break; | |
317 | ||
8c0695e4 TE |
318 | case NFC_PROTO_FELICA: |
319 | framing = NFC_DIGITAL_FRAMING_NFCF_T3T; | |
320 | check_crc = digital_skb_check_crc_f; | |
321 | add_crc = digital_skb_add_crc_f; | |
322 | break; | |
323 | ||
7d0911c0 TE |
324 | case NFC_PROTO_NFC_DEP: |
325 | if (rf_tech == NFC_DIGITAL_RF_TECH_106A) { | |
326 | framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP; | |
327 | check_crc = digital_skb_check_crc_a; | |
328 | add_crc = digital_skb_add_crc_a; | |
329 | } else { | |
330 | framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP; | |
331 | check_crc = digital_skb_check_crc_f; | |
332 | add_crc = digital_skb_add_crc_f; | |
333 | } | |
334 | break; | |
335 | ||
a381d482 MG |
336 | case NFC_PROTO_ISO15693: |
337 | framing = NFC_DIGITAL_FRAMING_ISO15693_TVT; | |
338 | check_crc = digital_skb_check_crc_b; | |
339 | add_crc = digital_skb_add_crc_b; | |
12e3d241 TE |
340 | |
341 | case NFC_PROTO_ISO14443: | |
342 | framing = NFC_DIGITAL_FRAMING_NFCA_T4T; | |
343 | check_crc = digital_skb_check_crc_a; | |
344 | add_crc = digital_skb_add_crc_a; | |
a381d482 MG |
345 | break; |
346 | ||
2c66daec | 347 | default: |
26042530 | 348 | pr_err("Invalid protocol %d\n", protocol); |
2c66daec TE |
349 | return -EINVAL; |
350 | } | |
351 | ||
26042530 | 352 | pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol); |
2c66daec TE |
353 | |
354 | ddev->curr_rf_tech = rf_tech; | |
2c66daec TE |
355 | |
356 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
357 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
358 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
359 | } else { | |
360 | ddev->skb_add_crc = add_crc; | |
361 | ddev->skb_check_crc = check_crc; | |
362 | } | |
363 | ||
364 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing); | |
365 | if (rc) | |
366 | return rc; | |
367 | ||
368 | target->supported_protocols = (1 << protocol); | |
369 | rc = nfc_targets_found(ddev->nfc_dev, target, 1); | |
370 | if (rc) | |
371 | return rc; | |
372 | ||
373 | ddev->poll_tech_count = 0; | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
59ee2361 TE |
378 | void digital_poll_next_tech(struct nfc_digital_dev *ddev) |
379 | { | |
380 | digital_switch_rf(ddev, 0); | |
381 | ||
382 | mutex_lock(&ddev->poll_lock); | |
383 | ||
384 | if (!ddev->poll_tech_count) { | |
385 | mutex_unlock(&ddev->poll_lock); | |
386 | return; | |
387 | } | |
388 | ||
389 | ddev->poll_tech_index = (ddev->poll_tech_index + 1) % | |
390 | ddev->poll_tech_count; | |
391 | ||
392 | mutex_unlock(&ddev->poll_lock); | |
393 | ||
394 | schedule_work(&ddev->poll_work); | |
395 | } | |
396 | ||
397 | static void digital_wq_poll(struct work_struct *work) | |
398 | { | |
399 | int rc; | |
400 | struct digital_poll_tech *poll_tech; | |
401 | struct nfc_digital_dev *ddev = container_of(work, | |
402 | struct nfc_digital_dev, | |
403 | poll_work); | |
404 | mutex_lock(&ddev->poll_lock); | |
405 | ||
406 | if (!ddev->poll_tech_count) { | |
407 | mutex_unlock(&ddev->poll_lock); | |
408 | return; | |
409 | } | |
410 | ||
411 | poll_tech = &ddev->poll_techs[ddev->poll_tech_index]; | |
412 | ||
413 | mutex_unlock(&ddev->poll_lock); | |
414 | ||
415 | rc = poll_tech->poll_func(ddev, poll_tech->rf_tech); | |
416 | if (rc) | |
417 | digital_poll_next_tech(ddev); | |
418 | } | |
419 | ||
420 | static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech, | |
421 | digital_poll_t poll_func) | |
422 | { | |
423 | struct digital_poll_tech *poll_tech; | |
424 | ||
425 | if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX) | |
426 | return; | |
427 | ||
428 | poll_tech = &ddev->poll_techs[ddev->poll_tech_count++]; | |
429 | ||
430 | poll_tech->rf_tech = rf_tech; | |
431 | poll_tech->poll_func = poll_func; | |
432 | } | |
433 | ||
434 | /** | |
435 | * start_poll operation | |
436 | * | |
437 | * For every supported protocol, the corresponding polling function is added | |
438 | * to the table of polling technologies (ddev->poll_techs[]) using | |
439 | * digital_add_poll_tech(). | |
440 | * When a polling function fails (by timeout or protocol error) the next one is | |
441 | * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work). | |
442 | */ | |
4b10884e TE |
443 | static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols, |
444 | __u32 tm_protocols) | |
445 | { | |
59ee2361 TE |
446 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
447 | u32 matching_im_protocols, matching_tm_protocols; | |
448 | ||
26042530 | 449 | pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols, |
c5da0e4a | 450 | tm_protocols, ddev->protocols); |
59ee2361 TE |
451 | |
452 | matching_im_protocols = ddev->protocols & im_protocols; | |
453 | matching_tm_protocols = ddev->protocols & tm_protocols; | |
454 | ||
455 | if (!matching_im_protocols && !matching_tm_protocols) { | |
26042530 | 456 | pr_err("Unknown protocol\n"); |
59ee2361 TE |
457 | return -EINVAL; |
458 | } | |
459 | ||
460 | if (ddev->poll_tech_count) { | |
26042530 | 461 | pr_err("Already polling\n"); |
59ee2361 TE |
462 | return -EBUSY; |
463 | } | |
464 | ||
465 | if (ddev->curr_protocol) { | |
26042530 | 466 | pr_err("A target is already active\n"); |
59ee2361 TE |
467 | return -EBUSY; |
468 | } | |
469 | ||
470 | ddev->poll_tech_count = 0; | |
471 | ddev->poll_tech_index = 0; | |
472 | ||
473 | if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH) | |
474 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
475 | digital_in_send_sens_req); | |
476 | ||
8c0695e4 TE |
477 | if (im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) { |
478 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, | |
479 | digital_in_send_sensf_req); | |
480 | ||
481 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
482 | digital_in_send_sensf_req); | |
483 | } | |
484 | ||
a381d482 MG |
485 | if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH) |
486 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693, | |
487 | digital_in_send_iso15693_inv_req); | |
488 | ||
1c7a4c24 TE |
489 | if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
490 | if (ddev->ops->tg_listen_mdaa) { | |
491 | digital_add_poll_tech(ddev, 0, | |
492 | digital_tg_listen_mdaa); | |
493 | } else { | |
494 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
495 | digital_tg_listen_nfca); | |
496 | ||
497 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, | |
498 | digital_tg_listen_nfcf); | |
499 | ||
500 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
501 | digital_tg_listen_nfcf); | |
502 | } | |
503 | } | |
504 | ||
59ee2361 | 505 | if (!ddev->poll_tech_count) { |
26042530 | 506 | pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n", |
59ee2361 TE |
507 | matching_im_protocols, matching_tm_protocols); |
508 | return -EINVAL; | |
509 | } | |
510 | ||
511 | schedule_work(&ddev->poll_work); | |
512 | ||
513 | return 0; | |
4b10884e TE |
514 | } |
515 | ||
516 | static void digital_stop_poll(struct nfc_dev *nfc_dev) | |
517 | { | |
59ee2361 TE |
518 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
519 | ||
520 | mutex_lock(&ddev->poll_lock); | |
521 | ||
522 | if (!ddev->poll_tech_count) { | |
26042530 | 523 | pr_err("Polling operation was not running\n"); |
59ee2361 TE |
524 | mutex_unlock(&ddev->poll_lock); |
525 | return; | |
526 | } | |
527 | ||
528 | ddev->poll_tech_count = 0; | |
529 | ||
530 | mutex_unlock(&ddev->poll_lock); | |
531 | ||
532 | cancel_work_sync(&ddev->poll_work); | |
533 | ||
534 | digital_abort_cmd(ddev); | |
4b10884e TE |
535 | } |
536 | ||
537 | static int digital_dev_up(struct nfc_dev *nfc_dev) | |
538 | { | |
59ee2361 TE |
539 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
540 | ||
541 | digital_switch_rf(ddev, 1); | |
542 | ||
543 | return 0; | |
4b10884e TE |
544 | } |
545 | ||
546 | static int digital_dev_down(struct nfc_dev *nfc_dev) | |
547 | { | |
59ee2361 TE |
548 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
549 | ||
550 | digital_switch_rf(ddev, 0); | |
551 | ||
552 | return 0; | |
4b10884e TE |
553 | } |
554 | ||
555 | static int digital_dep_link_up(struct nfc_dev *nfc_dev, | |
556 | struct nfc_target *target, | |
557 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
558 | { | |
7d0911c0 | 559 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
48e10445 TE |
560 | int rc; |
561 | ||
562 | rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len); | |
7d0911c0 | 563 | |
48e10445 TE |
564 | if (!rc) |
565 | ddev->curr_protocol = NFC_PROTO_NFC_DEP; | |
566 | ||
567 | return rc; | |
4b10884e TE |
568 | } |
569 | ||
570 | static int digital_dep_link_down(struct nfc_dev *nfc_dev) | |
571 | { | |
7d0911c0 TE |
572 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
573 | ||
574 | ddev->curr_protocol = 0; | |
575 | ||
576 | return 0; | |
4b10884e TE |
577 | } |
578 | ||
579 | static int digital_activate_target(struct nfc_dev *nfc_dev, | |
580 | struct nfc_target *target, __u32 protocol) | |
581 | { | |
48e10445 TE |
582 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
583 | ||
584 | if (ddev->poll_tech_count) { | |
585 | pr_err("Can't activate a target while polling\n"); | |
586 | return -EBUSY; | |
587 | } | |
588 | ||
589 | if (ddev->curr_protocol) { | |
590 | pr_err("A target is already active\n"); | |
591 | return -EBUSY; | |
592 | } | |
593 | ||
594 | ddev->curr_protocol = protocol; | |
595 | ||
59ee2361 | 596 | return 0; |
4b10884e TE |
597 | } |
598 | ||
599 | static void digital_deactivate_target(struct nfc_dev *nfc_dev, | |
600 | struct nfc_target *target) | |
601 | { | |
59ee2361 TE |
602 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
603 | ||
48e10445 TE |
604 | if (!ddev->curr_protocol) { |
605 | pr_err("No active target\n"); | |
606 | return; | |
607 | } | |
608 | ||
59ee2361 | 609 | ddev->curr_protocol = 0; |
4b10884e TE |
610 | } |
611 | ||
612 | static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb) | |
613 | { | |
1c7a4c24 TE |
614 | struct nfc_digital_dev *ddev = nfc_get_drvdata(dev); |
615 | ||
616 | return digital_tg_send_dep_res(ddev, skb); | |
4b10884e TE |
617 | } |
618 | ||
2c66daec TE |
619 | static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg, |
620 | struct sk_buff *resp) | |
621 | { | |
622 | struct digital_data_exch *data_exch = arg; | |
623 | int rc; | |
624 | ||
625 | if (IS_ERR(resp)) { | |
626 | rc = PTR_ERR(resp); | |
627 | goto done; | |
628 | } | |
629 | ||
630 | if (ddev->curr_protocol == NFC_PROTO_MIFARE) | |
631 | rc = digital_in_recv_mifare_res(resp); | |
632 | else | |
633 | rc = ddev->skb_check_crc(resp); | |
634 | ||
635 | if (rc) { | |
636 | kfree_skb(resp); | |
637 | resp = NULL; | |
638 | } | |
639 | ||
640 | done: | |
641 | data_exch->cb(data_exch->cb_context, resp, rc); | |
642 | ||
643 | kfree(data_exch); | |
644 | } | |
645 | ||
4b10884e TE |
646 | static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target, |
647 | struct sk_buff *skb, data_exchange_cb_t cb, | |
648 | void *cb_context) | |
649 | { | |
2c66daec TE |
650 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
651 | struct digital_data_exch *data_exch; | |
652 | ||
653 | data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL); | |
654 | if (!data_exch) { | |
26042530 | 655 | pr_err("Failed to allocate data_exch struct\n"); |
2c66daec TE |
656 | return -ENOMEM; |
657 | } | |
658 | ||
659 | data_exch->cb = cb; | |
660 | data_exch->cb_context = cb_context; | |
661 | ||
7d0911c0 TE |
662 | if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) |
663 | return digital_in_send_dep_req(ddev, target, skb, data_exch); | |
664 | ||
2c66daec TE |
665 | ddev->skb_add_crc(skb); |
666 | ||
667 | return digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete, | |
668 | data_exch); | |
4b10884e TE |
669 | } |
670 | ||
671 | static struct nfc_ops digital_nfc_ops = { | |
672 | .dev_up = digital_dev_up, | |
673 | .dev_down = digital_dev_down, | |
674 | .start_poll = digital_start_poll, | |
675 | .stop_poll = digital_stop_poll, | |
676 | .dep_link_up = digital_dep_link_up, | |
677 | .dep_link_down = digital_dep_link_down, | |
678 | .activate_target = digital_activate_target, | |
679 | .deactivate_target = digital_deactivate_target, | |
680 | .tm_send = digital_tg_send, | |
681 | .im_transceive = digital_in_send, | |
682 | }; | |
683 | ||
684 | struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, | |
685 | __u32 supported_protocols, | |
686 | __u32 driver_capabilities, | |
687 | int tx_headroom, int tx_tailroom) | |
688 | { | |
689 | struct nfc_digital_dev *ddev; | |
690 | ||
691 | if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen || | |
692 | !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd || | |
693 | !ops->switch_rf) | |
694 | return NULL; | |
695 | ||
696 | ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL); | |
26042530 | 697 | if (!ddev) |
4b10884e | 698 | return NULL; |
4b10884e TE |
699 | |
700 | ddev->driver_capabilities = driver_capabilities; | |
701 | ddev->ops = ops; | |
702 | ||
59ee2361 TE |
703 | mutex_init(&ddev->cmd_lock); |
704 | INIT_LIST_HEAD(&ddev->cmd_queue); | |
705 | ||
706 | INIT_WORK(&ddev->cmd_work, digital_wq_cmd); | |
707 | INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete); | |
708 | ||
709 | mutex_init(&ddev->poll_lock); | |
710 | INIT_WORK(&ddev->poll_work, digital_wq_poll); | |
711 | ||
712 | if (supported_protocols & NFC_PROTO_JEWEL_MASK) | |
713 | ddev->protocols |= NFC_PROTO_JEWEL_MASK; | |
714 | if (supported_protocols & NFC_PROTO_MIFARE_MASK) | |
715 | ddev->protocols |= NFC_PROTO_MIFARE_MASK; | |
8c0695e4 TE |
716 | if (supported_protocols & NFC_PROTO_FELICA_MASK) |
717 | ddev->protocols |= NFC_PROTO_FELICA_MASK; | |
7d0911c0 TE |
718 | if (supported_protocols & NFC_PROTO_NFC_DEP_MASK) |
719 | ddev->protocols |= NFC_PROTO_NFC_DEP_MASK; | |
a381d482 MG |
720 | if (supported_protocols & NFC_PROTO_ISO15693_MASK) |
721 | ddev->protocols |= NFC_PROTO_ISO15693_MASK; | |
12e3d241 TE |
722 | if (supported_protocols & NFC_PROTO_ISO14443_MASK) |
723 | ddev->protocols |= NFC_PROTO_ISO14443_MASK; | |
59ee2361 TE |
724 | |
725 | ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN; | |
726 | ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN; | |
4b10884e TE |
727 | |
728 | ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols, | |
729 | ddev->tx_headroom, | |
730 | ddev->tx_tailroom); | |
731 | if (!ddev->nfc_dev) { | |
26042530 | 732 | pr_err("nfc_allocate_device failed\n"); |
4b10884e TE |
733 | goto free_dev; |
734 | } | |
735 | ||
736 | nfc_set_drvdata(ddev->nfc_dev, ddev); | |
737 | ||
738 | return ddev; | |
739 | ||
740 | free_dev: | |
741 | kfree(ddev); | |
742 | ||
743 | return NULL; | |
744 | } | |
745 | EXPORT_SYMBOL(nfc_digital_allocate_device); | |
746 | ||
747 | void nfc_digital_free_device(struct nfc_digital_dev *ddev) | |
748 | { | |
749 | nfc_free_device(ddev->nfc_dev); | |
4b10884e TE |
750 | kfree(ddev); |
751 | } | |
752 | EXPORT_SYMBOL(nfc_digital_free_device); | |
753 | ||
754 | int nfc_digital_register_device(struct nfc_digital_dev *ddev) | |
755 | { | |
756 | return nfc_register_device(ddev->nfc_dev); | |
757 | } | |
758 | EXPORT_SYMBOL(nfc_digital_register_device); | |
759 | ||
760 | void nfc_digital_unregister_device(struct nfc_digital_dev *ddev) | |
761 | { | |
59ee2361 TE |
762 | struct digital_cmd *cmd, *n; |
763 | ||
4b10884e | 764 | nfc_unregister_device(ddev->nfc_dev); |
59ee2361 TE |
765 | |
766 | mutex_lock(&ddev->poll_lock); | |
767 | ddev->poll_tech_count = 0; | |
768 | mutex_unlock(&ddev->poll_lock); | |
769 | ||
770 | cancel_work_sync(&ddev->poll_work); | |
771 | cancel_work_sync(&ddev->cmd_work); | |
772 | cancel_work_sync(&ddev->cmd_complete_work); | |
773 | ||
774 | list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) { | |
775 | list_del(&cmd->queue); | |
1c7a4c24 | 776 | kfree(cmd->mdaa_params); |
59ee2361 TE |
777 | kfree(cmd); |
778 | } | |
4b10884e TE |
779 | } |
780 | EXPORT_SYMBOL(nfc_digital_unregister_device); | |
781 | ||
782 | MODULE_LICENSE("GPL"); |