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 | 336 | case NFC_PROTO_ISO15693: |
ceeee42d | 337 | framing = NFC_DIGITAL_FRAMING_ISO15693_T5T; |
a381d482 MG |
338 | check_crc = digital_skb_check_crc_b; |
339 | add_crc = digital_skb_add_crc_b; | |
564af14e | 340 | break; |
12e3d241 TE |
341 | |
342 | case NFC_PROTO_ISO14443: | |
343 | framing = NFC_DIGITAL_FRAMING_NFCA_T4T; | |
344 | check_crc = digital_skb_check_crc_a; | |
345 | add_crc = digital_skb_add_crc_a; | |
a381d482 MG |
346 | break; |
347 | ||
2c66daec | 348 | default: |
26042530 | 349 | pr_err("Invalid protocol %d\n", protocol); |
2c66daec TE |
350 | return -EINVAL; |
351 | } | |
352 | ||
26042530 | 353 | pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol); |
2c66daec TE |
354 | |
355 | ddev->curr_rf_tech = rf_tech; | |
2c66daec TE |
356 | |
357 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
358 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
359 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
360 | } else { | |
361 | ddev->skb_add_crc = add_crc; | |
362 | ddev->skb_check_crc = check_crc; | |
363 | } | |
364 | ||
365 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing); | |
366 | if (rc) | |
367 | return rc; | |
368 | ||
369 | target->supported_protocols = (1 << protocol); | |
370 | rc = nfc_targets_found(ddev->nfc_dev, target, 1); | |
371 | if (rc) | |
372 | return rc; | |
373 | ||
374 | ddev->poll_tech_count = 0; | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
59ee2361 TE |
379 | void digital_poll_next_tech(struct nfc_digital_dev *ddev) |
380 | { | |
381 | digital_switch_rf(ddev, 0); | |
382 | ||
383 | mutex_lock(&ddev->poll_lock); | |
384 | ||
385 | if (!ddev->poll_tech_count) { | |
386 | mutex_unlock(&ddev->poll_lock); | |
387 | return; | |
388 | } | |
389 | ||
390 | ddev->poll_tech_index = (ddev->poll_tech_index + 1) % | |
391 | ddev->poll_tech_count; | |
392 | ||
393 | mutex_unlock(&ddev->poll_lock); | |
394 | ||
395 | schedule_work(&ddev->poll_work); | |
396 | } | |
397 | ||
398 | static void digital_wq_poll(struct work_struct *work) | |
399 | { | |
400 | int rc; | |
401 | struct digital_poll_tech *poll_tech; | |
402 | struct nfc_digital_dev *ddev = container_of(work, | |
403 | struct nfc_digital_dev, | |
404 | poll_work); | |
405 | mutex_lock(&ddev->poll_lock); | |
406 | ||
407 | if (!ddev->poll_tech_count) { | |
408 | mutex_unlock(&ddev->poll_lock); | |
409 | return; | |
410 | } | |
411 | ||
412 | poll_tech = &ddev->poll_techs[ddev->poll_tech_index]; | |
413 | ||
414 | mutex_unlock(&ddev->poll_lock); | |
415 | ||
416 | rc = poll_tech->poll_func(ddev, poll_tech->rf_tech); | |
417 | if (rc) | |
418 | digital_poll_next_tech(ddev); | |
419 | } | |
420 | ||
421 | static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech, | |
422 | digital_poll_t poll_func) | |
423 | { | |
424 | struct digital_poll_tech *poll_tech; | |
425 | ||
426 | if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX) | |
427 | return; | |
428 | ||
429 | poll_tech = &ddev->poll_techs[ddev->poll_tech_count++]; | |
430 | ||
431 | poll_tech->rf_tech = rf_tech; | |
432 | poll_tech->poll_func = poll_func; | |
433 | } | |
434 | ||
435 | /** | |
436 | * start_poll operation | |
437 | * | |
438 | * For every supported protocol, the corresponding polling function is added | |
439 | * to the table of polling technologies (ddev->poll_techs[]) using | |
440 | * digital_add_poll_tech(). | |
441 | * When a polling function fails (by timeout or protocol error) the next one is | |
442 | * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work). | |
443 | */ | |
4b10884e TE |
444 | static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols, |
445 | __u32 tm_protocols) | |
446 | { | |
59ee2361 TE |
447 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
448 | u32 matching_im_protocols, matching_tm_protocols; | |
449 | ||
26042530 | 450 | pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols, |
c5da0e4a | 451 | tm_protocols, ddev->protocols); |
59ee2361 TE |
452 | |
453 | matching_im_protocols = ddev->protocols & im_protocols; | |
454 | matching_tm_protocols = ddev->protocols & tm_protocols; | |
455 | ||
456 | if (!matching_im_protocols && !matching_tm_protocols) { | |
26042530 | 457 | pr_err("Unknown protocol\n"); |
59ee2361 TE |
458 | return -EINVAL; |
459 | } | |
460 | ||
461 | if (ddev->poll_tech_count) { | |
26042530 | 462 | pr_err("Already polling\n"); |
59ee2361 TE |
463 | return -EBUSY; |
464 | } | |
465 | ||
466 | if (ddev->curr_protocol) { | |
26042530 | 467 | pr_err("A target is already active\n"); |
59ee2361 TE |
468 | return -EBUSY; |
469 | } | |
470 | ||
471 | ddev->poll_tech_count = 0; | |
472 | ddev->poll_tech_index = 0; | |
473 | ||
474 | if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH) | |
475 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
476 | digital_in_send_sens_req); | |
477 | ||
4f913d46 | 478 | if (matching_im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) { |
8c0695e4 TE |
479 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, |
480 | digital_in_send_sensf_req); | |
481 | ||
482 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
483 | digital_in_send_sensf_req); | |
484 | } | |
485 | ||
a381d482 MG |
486 | if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH) |
487 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693, | |
488 | digital_in_send_iso15693_inv_req); | |
489 | ||
4f913d46 | 490 | if (matching_tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
1c7a4c24 TE |
491 | if (ddev->ops->tg_listen_mdaa) { |
492 | digital_add_poll_tech(ddev, 0, | |
493 | digital_tg_listen_mdaa); | |
494 | } else { | |
495 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
496 | digital_tg_listen_nfca); | |
497 | ||
498 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, | |
499 | digital_tg_listen_nfcf); | |
500 | ||
501 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
502 | digital_tg_listen_nfcf); | |
503 | } | |
504 | } | |
505 | ||
59ee2361 | 506 | if (!ddev->poll_tech_count) { |
26042530 | 507 | pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n", |
59ee2361 TE |
508 | matching_im_protocols, matching_tm_protocols); |
509 | return -EINVAL; | |
510 | } | |
511 | ||
512 | schedule_work(&ddev->poll_work); | |
513 | ||
514 | return 0; | |
4b10884e TE |
515 | } |
516 | ||
517 | static void digital_stop_poll(struct nfc_dev *nfc_dev) | |
518 | { | |
59ee2361 TE |
519 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
520 | ||
521 | mutex_lock(&ddev->poll_lock); | |
522 | ||
523 | if (!ddev->poll_tech_count) { | |
26042530 | 524 | pr_err("Polling operation was not running\n"); |
59ee2361 TE |
525 | mutex_unlock(&ddev->poll_lock); |
526 | return; | |
527 | } | |
528 | ||
529 | ddev->poll_tech_count = 0; | |
530 | ||
531 | mutex_unlock(&ddev->poll_lock); | |
532 | ||
533 | cancel_work_sync(&ddev->poll_work); | |
534 | ||
535 | digital_abort_cmd(ddev); | |
4b10884e TE |
536 | } |
537 | ||
538 | static int digital_dev_up(struct nfc_dev *nfc_dev) | |
539 | { | |
59ee2361 TE |
540 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
541 | ||
542 | digital_switch_rf(ddev, 1); | |
543 | ||
544 | return 0; | |
4b10884e TE |
545 | } |
546 | ||
547 | static int digital_dev_down(struct nfc_dev *nfc_dev) | |
548 | { | |
59ee2361 TE |
549 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
550 | ||
551 | digital_switch_rf(ddev, 0); | |
552 | ||
553 | return 0; | |
4b10884e TE |
554 | } |
555 | ||
556 | static int digital_dep_link_up(struct nfc_dev *nfc_dev, | |
557 | struct nfc_target *target, | |
558 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
559 | { | |
7d0911c0 | 560 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
48e10445 TE |
561 | int rc; |
562 | ||
563 | rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len); | |
7d0911c0 | 564 | |
48e10445 TE |
565 | if (!rc) |
566 | ddev->curr_protocol = NFC_PROTO_NFC_DEP; | |
567 | ||
568 | return rc; | |
4b10884e TE |
569 | } |
570 | ||
571 | static int digital_dep_link_down(struct nfc_dev *nfc_dev) | |
572 | { | |
7d0911c0 TE |
573 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
574 | ||
575 | ddev->curr_protocol = 0; | |
576 | ||
577 | return 0; | |
4b10884e TE |
578 | } |
579 | ||
580 | static int digital_activate_target(struct nfc_dev *nfc_dev, | |
581 | struct nfc_target *target, __u32 protocol) | |
582 | { | |
48e10445 TE |
583 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
584 | ||
585 | if (ddev->poll_tech_count) { | |
586 | pr_err("Can't activate a target while polling\n"); | |
587 | return -EBUSY; | |
588 | } | |
589 | ||
590 | if (ddev->curr_protocol) { | |
591 | pr_err("A target is already active\n"); | |
592 | return -EBUSY; | |
593 | } | |
594 | ||
595 | ddev->curr_protocol = protocol; | |
596 | ||
59ee2361 | 597 | return 0; |
4b10884e TE |
598 | } |
599 | ||
600 | static void digital_deactivate_target(struct nfc_dev *nfc_dev, | |
601 | struct nfc_target *target) | |
602 | { | |
59ee2361 TE |
603 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
604 | ||
48e10445 TE |
605 | if (!ddev->curr_protocol) { |
606 | pr_err("No active target\n"); | |
607 | return; | |
608 | } | |
609 | ||
59ee2361 | 610 | ddev->curr_protocol = 0; |
4b10884e TE |
611 | } |
612 | ||
613 | static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb) | |
614 | { | |
1c7a4c24 TE |
615 | struct nfc_digital_dev *ddev = nfc_get_drvdata(dev); |
616 | ||
617 | return digital_tg_send_dep_res(ddev, skb); | |
4b10884e TE |
618 | } |
619 | ||
2c66daec TE |
620 | static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg, |
621 | struct sk_buff *resp) | |
622 | { | |
623 | struct digital_data_exch *data_exch = arg; | |
624 | int rc; | |
625 | ||
626 | if (IS_ERR(resp)) { | |
627 | rc = PTR_ERR(resp); | |
c813007f | 628 | resp = NULL; |
2c66daec TE |
629 | goto done; |
630 | } | |
631 | ||
c813007f | 632 | if (ddev->curr_protocol == NFC_PROTO_MIFARE) { |
2c66daec | 633 | rc = digital_in_recv_mifare_res(resp); |
c813007f TE |
634 | /* crc check is done in digital_in_recv_mifare_res() */ |
635 | goto done; | |
636 | } | |
637 | ||
638 | if (ddev->curr_protocol == NFC_PROTO_ISO14443) { | |
639 | rc = digital_in_iso_dep_pull_sod(ddev, resp); | |
640 | if (rc) | |
641 | goto done; | |
642 | } | |
643 | ||
644 | rc = ddev->skb_check_crc(resp); | |
2c66daec | 645 | |
c813007f | 646 | done: |
2c66daec TE |
647 | if (rc) { |
648 | kfree_skb(resp); | |
649 | resp = NULL; | |
650 | } | |
651 | ||
2c66daec TE |
652 | data_exch->cb(data_exch->cb_context, resp, rc); |
653 | ||
654 | kfree(data_exch); | |
655 | } | |
656 | ||
4b10884e TE |
657 | static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target, |
658 | struct sk_buff *skb, data_exchange_cb_t cb, | |
659 | void *cb_context) | |
660 | { | |
2c66daec TE |
661 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
662 | struct digital_data_exch *data_exch; | |
c813007f | 663 | int rc; |
2c66daec TE |
664 | |
665 | data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL); | |
666 | if (!data_exch) { | |
26042530 | 667 | pr_err("Failed to allocate data_exch struct\n"); |
2c66daec TE |
668 | return -ENOMEM; |
669 | } | |
670 | ||
671 | data_exch->cb = cb; | |
672 | data_exch->cb_context = cb_context; | |
673 | ||
6ea7398d TE |
674 | if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) { |
675 | rc = digital_in_send_dep_req(ddev, target, skb, data_exch); | |
676 | goto exit; | |
677 | } | |
7d0911c0 | 678 | |
c813007f TE |
679 | if (ddev->curr_protocol == NFC_PROTO_ISO14443) { |
680 | rc = digital_in_iso_dep_push_sod(ddev, skb); | |
681 | if (rc) | |
6ea7398d | 682 | goto exit; |
c813007f TE |
683 | } |
684 | ||
2c66daec TE |
685 | ddev->skb_add_crc(skb); |
686 | ||
6ea7398d TE |
687 | rc = digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete, |
688 | data_exch); | |
689 | ||
690 | exit: | |
691 | if (rc) | |
692 | kfree(data_exch); | |
693 | ||
694 | return rc; | |
4b10884e TE |
695 | } |
696 | ||
697 | static struct nfc_ops digital_nfc_ops = { | |
698 | .dev_up = digital_dev_up, | |
699 | .dev_down = digital_dev_down, | |
700 | .start_poll = digital_start_poll, | |
701 | .stop_poll = digital_stop_poll, | |
702 | .dep_link_up = digital_dep_link_up, | |
703 | .dep_link_down = digital_dep_link_down, | |
704 | .activate_target = digital_activate_target, | |
705 | .deactivate_target = digital_deactivate_target, | |
706 | .tm_send = digital_tg_send, | |
707 | .im_transceive = digital_in_send, | |
708 | }; | |
709 | ||
710 | struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, | |
711 | __u32 supported_protocols, | |
712 | __u32 driver_capabilities, | |
713 | int tx_headroom, int tx_tailroom) | |
714 | { | |
715 | struct nfc_digital_dev *ddev; | |
716 | ||
717 | if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen || | |
718 | !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd || | |
719 | !ops->switch_rf) | |
720 | return NULL; | |
721 | ||
722 | ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL); | |
26042530 | 723 | if (!ddev) |
4b10884e | 724 | return NULL; |
4b10884e TE |
725 | |
726 | ddev->driver_capabilities = driver_capabilities; | |
727 | ddev->ops = ops; | |
728 | ||
59ee2361 TE |
729 | mutex_init(&ddev->cmd_lock); |
730 | INIT_LIST_HEAD(&ddev->cmd_queue); | |
731 | ||
732 | INIT_WORK(&ddev->cmd_work, digital_wq_cmd); | |
733 | INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete); | |
734 | ||
735 | mutex_init(&ddev->poll_lock); | |
736 | INIT_WORK(&ddev->poll_work, digital_wq_poll); | |
737 | ||
738 | if (supported_protocols & NFC_PROTO_JEWEL_MASK) | |
739 | ddev->protocols |= NFC_PROTO_JEWEL_MASK; | |
740 | if (supported_protocols & NFC_PROTO_MIFARE_MASK) | |
741 | ddev->protocols |= NFC_PROTO_MIFARE_MASK; | |
8c0695e4 TE |
742 | if (supported_protocols & NFC_PROTO_FELICA_MASK) |
743 | ddev->protocols |= NFC_PROTO_FELICA_MASK; | |
7d0911c0 TE |
744 | if (supported_protocols & NFC_PROTO_NFC_DEP_MASK) |
745 | ddev->protocols |= NFC_PROTO_NFC_DEP_MASK; | |
a381d482 MG |
746 | if (supported_protocols & NFC_PROTO_ISO15693_MASK) |
747 | ddev->protocols |= NFC_PROTO_ISO15693_MASK; | |
12e3d241 TE |
748 | if (supported_protocols & NFC_PROTO_ISO14443_MASK) |
749 | ddev->protocols |= NFC_PROTO_ISO14443_MASK; | |
59ee2361 TE |
750 | |
751 | ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN; | |
752 | ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN; | |
4b10884e TE |
753 | |
754 | ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols, | |
755 | ddev->tx_headroom, | |
756 | ddev->tx_tailroom); | |
757 | if (!ddev->nfc_dev) { | |
26042530 | 758 | pr_err("nfc_allocate_device failed\n"); |
4b10884e TE |
759 | goto free_dev; |
760 | } | |
761 | ||
762 | nfc_set_drvdata(ddev->nfc_dev, ddev); | |
763 | ||
764 | return ddev; | |
765 | ||
766 | free_dev: | |
767 | kfree(ddev); | |
768 | ||
769 | return NULL; | |
770 | } | |
771 | EXPORT_SYMBOL(nfc_digital_allocate_device); | |
772 | ||
773 | void nfc_digital_free_device(struct nfc_digital_dev *ddev) | |
774 | { | |
775 | nfc_free_device(ddev->nfc_dev); | |
4b10884e TE |
776 | kfree(ddev); |
777 | } | |
778 | EXPORT_SYMBOL(nfc_digital_free_device); | |
779 | ||
780 | int nfc_digital_register_device(struct nfc_digital_dev *ddev) | |
781 | { | |
782 | return nfc_register_device(ddev->nfc_dev); | |
783 | } | |
784 | EXPORT_SYMBOL(nfc_digital_register_device); | |
785 | ||
786 | void nfc_digital_unregister_device(struct nfc_digital_dev *ddev) | |
787 | { | |
59ee2361 TE |
788 | struct digital_cmd *cmd, *n; |
789 | ||
4b10884e | 790 | nfc_unregister_device(ddev->nfc_dev); |
59ee2361 TE |
791 | |
792 | mutex_lock(&ddev->poll_lock); | |
793 | ddev->poll_tech_count = 0; | |
794 | mutex_unlock(&ddev->poll_lock); | |
795 | ||
796 | cancel_work_sync(&ddev->poll_work); | |
797 | cancel_work_sync(&ddev->cmd_work); | |
798 | cancel_work_sync(&ddev->cmd_complete_work); | |
799 | ||
800 | list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) { | |
801 | list_del(&cmd->queue); | |
1c7a4c24 | 802 | kfree(cmd->mdaa_params); |
59ee2361 TE |
803 | kfree(cmd); |
804 | } | |
4b10884e TE |
805 | } |
806 | EXPORT_SYMBOL(nfc_digital_unregister_device); | |
807 | ||
808 | MODULE_LICENSE("GPL"); |