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Commit | Line | Data |
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93aead46 IE |
1 | /* |
2 | * Texas Instrument's NFC Driver For Shared Transport. | |
3 | * | |
4 | * NFC Driver acts as interface between NCI core and | |
5 | * TI Shared Transport Layer. | |
6 | * | |
7 | * Copyright (C) 2011 Texas Instruments, Inc. | |
8 | * | |
9 | * Written by Ilan Elias <ilane@ti.com> | |
10 | * | |
11 | * Acknowledgements: | |
12 | * This file is based on btwilink.c, which was written | |
13 | * by Raja Mani and Pavan Savoy. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License version 2 as | |
17 | * published by the Free Software Foundation. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
27 | * | |
28 | */ | |
29 | #include <linux/platform_device.h> | |
baf79c33 | 30 | #include <linux/module.h> |
3ed1326d | 31 | #include <linux/types.h> |
1195d89b | 32 | #include <linux/firmware.h> |
93aead46 IE |
33 | #include <linux/nfc.h> |
34 | #include <net/nfc/nci.h> | |
35 | #include <net/nfc/nci_core.h> | |
36 | #include <linux/ti_wilink_st.h> | |
37 | ||
38 | #define NFCWILINK_CHNL 12 | |
39 | #define NFCWILINK_OPCODE 7 | |
40 | #define NFCWILINK_MAX_FRAME_SIZE 300 | |
41 | #define NFCWILINK_HDR_LEN 4 | |
42 | #define NFCWILINK_OFFSET_LEN_IN_HDR 1 | |
43 | #define NFCWILINK_LEN_SIZE 2 | |
44 | #define NFCWILINK_REGISTER_TIMEOUT 8000 /* 8 sec */ | |
1195d89b IE |
45 | #define NFCWILINK_CMD_TIMEOUT 5000 /* 5 sec */ |
46 | ||
47 | #define BTS_FILE_NAME_MAX_SIZE 40 | |
48 | #define BTS_FILE_HDR_MAGIC 0x42535442 | |
49 | #define BTS_FILE_CMD_MAX_LEN 0xff | |
50 | #define BTS_FILE_ACTION_TYPE_SEND_CMD 1 | |
51 | ||
52 | #define NCI_VS_NFCC_INFO_CMD_GID 0x2f | |
53 | #define NCI_VS_NFCC_INFO_CMD_OID 0x12 | |
54 | #define NCI_VS_NFCC_INFO_RSP_GID 0x4f | |
55 | #define NCI_VS_NFCC_INFO_RSP_OID 0x12 | |
93aead46 IE |
56 | |
57 | struct nfcwilink_hdr { | |
3ed1326d IE |
58 | __u8 chnl; |
59 | __u8 opcode; | |
60 | __le16 len; | |
93aead46 IE |
61 | } __packed; |
62 | ||
1195d89b IE |
63 | struct nci_vs_nfcc_info_cmd { |
64 | __u8 gid; | |
65 | __u8 oid; | |
66 | __u8 plen; | |
67 | } __packed; | |
68 | ||
69 | struct nci_vs_nfcc_info_rsp { | |
70 | __u8 gid; | |
71 | __u8 oid; | |
72 | __u8 plen; | |
73 | __u8 status; | |
74 | __u8 hw_id; | |
75 | __u8 sw_ver_x; | |
76 | __u8 sw_ver_z; | |
77 | __u8 patch_id; | |
78 | } __packed; | |
79 | ||
80 | struct bts_file_hdr { | |
81 | __le32 magic; | |
82 | __le32 ver; | |
83 | __u8 rfu[24]; | |
84 | __u8 actions[0]; | |
85 | } __packed; | |
86 | ||
87 | struct bts_file_action { | |
88 | __le16 type; | |
89 | __le16 len; | |
90 | __u8 data[0]; | |
91 | } __packed; | |
92 | ||
93aead46 IE |
93 | struct nfcwilink { |
94 | struct platform_device *pdev; | |
95 | struct nci_dev *ndev; | |
96 | unsigned long flags; | |
97 | ||
98 | char st_register_cb_status; | |
99 | long (*st_write) (struct sk_buff *); | |
1195d89b IE |
100 | |
101 | struct completion completed; | |
102 | ||
103 | struct nci_vs_nfcc_info_rsp nfcc_info; | |
93aead46 IE |
104 | }; |
105 | ||
106 | /* NFCWILINK driver flags */ | |
107 | enum { | |
108 | NFCWILINK_RUNNING, | |
1195d89b | 109 | NFCWILINK_FW_DOWNLOAD, |
93aead46 IE |
110 | }; |
111 | ||
1195d89b IE |
112 | static int nfcwilink_send(struct sk_buff *skb); |
113 | ||
114 | static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how) | |
115 | { | |
116 | struct sk_buff *skb; | |
117 | ||
118 | skb = alloc_skb(len + NFCWILINK_HDR_LEN, how); | |
119 | if (skb) | |
120 | skb_reserve(skb, NFCWILINK_HDR_LEN); | |
121 | ||
122 | return skb; | |
123 | } | |
124 | ||
125 | static void nfcwilink_fw_download_receive(struct nfcwilink *drv, | |
126 | struct sk_buff *skb) | |
127 | { | |
128 | struct nci_vs_nfcc_info_rsp *rsp = (void *)skb->data; | |
129 | ||
130 | /* Detect NCI_VS_NFCC_INFO_RSP and store the result */ | |
131 | if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) && | |
132 | (rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) { | |
133 | memcpy(&drv->nfcc_info, rsp, | |
134 | sizeof(struct nci_vs_nfcc_info_rsp)); | |
135 | } | |
136 | ||
137 | kfree_skb(skb); | |
138 | ||
139 | complete(&drv->completed); | |
140 | } | |
141 | ||
142 | static int nfcwilink_get_bts_file_name(struct nfcwilink *drv, char *file_name) | |
143 | { | |
144 | struct nci_vs_nfcc_info_cmd *cmd; | |
145 | struct sk_buff *skb; | |
146 | unsigned long comp_ret; | |
147 | int rc; | |
148 | ||
149 | nfc_dev_dbg(&drv->pdev->dev, "get_bts_file_name entry"); | |
150 | ||
151 | skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd), | |
152 | GFP_KERNEL); | |
153 | if (!skb) { | |
154 | nfc_dev_err(&drv->pdev->dev, | |
155 | "no memory for nci_vs_nfcc_info_cmd"); | |
156 | return -ENOMEM; | |
157 | } | |
158 | ||
159 | skb->dev = (void *)drv->ndev; | |
160 | ||
161 | cmd = (struct nci_vs_nfcc_info_cmd *) | |
162 | skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd)); | |
163 | cmd->gid = NCI_VS_NFCC_INFO_CMD_GID; | |
164 | cmd->oid = NCI_VS_NFCC_INFO_CMD_OID; | |
165 | cmd->plen = 0; | |
166 | ||
167 | drv->nfcc_info.plen = 0; | |
168 | ||
169 | rc = nfcwilink_send(skb); | |
170 | if (rc) | |
171 | return rc; | |
172 | ||
173 | comp_ret = wait_for_completion_timeout(&drv->completed, | |
174 | msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT)); | |
175 | nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld", | |
176 | comp_ret); | |
177 | if (comp_ret == 0) { | |
178 | nfc_dev_err(&drv->pdev->dev, | |
179 | "timeout on wait_for_completion_timeout"); | |
180 | return -ETIMEDOUT; | |
181 | } | |
182 | ||
183 | nfc_dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d", | |
184 | drv->nfcc_info.plen, | |
185 | drv->nfcc_info.status); | |
186 | ||
187 | if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) { | |
188 | nfc_dev_err(&drv->pdev->dev, | |
189 | "invalid nci_vs_nfcc_info_rsp"); | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | snprintf(file_name, BTS_FILE_NAME_MAX_SIZE, | |
194 | "TINfcInit_%d.%d.%d.%d.bts", | |
195 | drv->nfcc_info.hw_id, | |
196 | drv->nfcc_info.sw_ver_x, | |
197 | drv->nfcc_info.sw_ver_z, | |
198 | drv->nfcc_info.patch_id); | |
199 | ||
200 | nfc_dev_info(&drv->pdev->dev, "nfcwilink FW file name: %s", file_name); | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len) | |
206 | { | |
207 | struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data; | |
208 | struct sk_buff *skb; | |
209 | unsigned long comp_ret; | |
210 | int rc; | |
211 | ||
212 | nfc_dev_dbg(&drv->pdev->dev, "send_bts_cmd entry"); | |
213 | ||
214 | /* verify valid cmd for the NFC channel */ | |
215 | if ((len <= sizeof(struct nfcwilink_hdr)) || | |
216 | (len > BTS_FILE_CMD_MAX_LEN) || | |
217 | (hdr->chnl != NFCWILINK_CHNL) || | |
218 | (hdr->opcode != NFCWILINK_OPCODE)) { | |
219 | nfc_dev_err(&drv->pdev->dev, | |
220 | "ignoring invalid bts cmd, len %d, chnl %d, opcode %d", | |
221 | len, hdr->chnl, hdr->opcode); | |
222 | return 0; | |
223 | } | |
224 | ||
225 | /* remove the ST header */ | |
226 | len -= sizeof(struct nfcwilink_hdr); | |
227 | data += sizeof(struct nfcwilink_hdr); | |
228 | ||
229 | skb = nfcwilink_skb_alloc(len, GFP_KERNEL); | |
230 | if (!skb) { | |
231 | nfc_dev_err(&drv->pdev->dev, "no memory for bts cmd"); | |
232 | return -ENOMEM; | |
233 | } | |
234 | ||
235 | skb->dev = (void *)drv->ndev; | |
236 | ||
237 | memcpy(skb_put(skb, len), data, len); | |
238 | ||
239 | rc = nfcwilink_send(skb); | |
240 | if (rc) | |
241 | return rc; | |
242 | ||
243 | comp_ret = wait_for_completion_timeout(&drv->completed, | |
244 | msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT)); | |
245 | nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld", | |
246 | comp_ret); | |
247 | if (comp_ret == 0) { | |
248 | nfc_dev_err(&drv->pdev->dev, | |
249 | "timeout on wait_for_completion_timeout"); | |
250 | return -ETIMEDOUT; | |
251 | } | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static int nfcwilink_download_fw(struct nfcwilink *drv) | |
257 | { | |
258 | unsigned char file_name[BTS_FILE_NAME_MAX_SIZE]; | |
259 | const struct firmware *fw; | |
260 | __u16 action_type, action_len; | |
261 | __u8 *ptr; | |
262 | int len, rc; | |
263 | ||
264 | nfc_dev_dbg(&drv->pdev->dev, "download_fw entry"); | |
265 | ||
266 | set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags); | |
267 | ||
268 | rc = nfcwilink_get_bts_file_name(drv, file_name); | |
269 | if (rc) | |
270 | goto exit; | |
271 | ||
272 | rc = request_firmware(&fw, file_name, &drv->pdev->dev); | |
273 | if (rc) { | |
274 | nfc_dev_err(&drv->pdev->dev, "request_firmware failed %d", rc); | |
275 | ||
276 | /* if the file is not found, don't exit with failure */ | |
277 | if (rc == -ENOENT) | |
278 | rc = 0; | |
279 | ||
280 | goto exit; | |
281 | } | |
282 | ||
283 | len = fw->size; | |
284 | ptr = (__u8 *)fw->data; | |
285 | ||
286 | if ((len == 0) || (ptr == NULL)) { | |
287 | nfc_dev_dbg(&drv->pdev->dev, | |
288 | "request_firmware returned size %d", len); | |
289 | goto release_fw; | |
290 | } | |
291 | ||
292 | if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) != | |
293 | BTS_FILE_HDR_MAGIC) { | |
294 | nfc_dev_err(&drv->pdev->dev, "wrong bts magic number"); | |
295 | rc = -EINVAL; | |
296 | goto release_fw; | |
297 | } | |
298 | ||
299 | /* remove the BTS header */ | |
300 | len -= sizeof(struct bts_file_hdr); | |
301 | ptr += sizeof(struct bts_file_hdr); | |
302 | ||
303 | while (len > 0) { | |
304 | action_type = | |
305 | __le16_to_cpu(((struct bts_file_action *)ptr)->type); | |
306 | action_len = | |
307 | __le16_to_cpu(((struct bts_file_action *)ptr)->len); | |
308 | ||
309 | nfc_dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d", | |
310 | action_type, action_len); | |
311 | ||
312 | switch (action_type) { | |
313 | case BTS_FILE_ACTION_TYPE_SEND_CMD: | |
314 | rc = nfcwilink_send_bts_cmd(drv, | |
315 | ((struct bts_file_action *)ptr)->data, | |
316 | action_len); | |
317 | if (rc) | |
318 | goto release_fw; | |
319 | break; | |
320 | } | |
321 | ||
322 | /* advance to the next action */ | |
323 | len -= (sizeof(struct bts_file_action) + action_len); | |
324 | ptr += (sizeof(struct bts_file_action) + action_len); | |
325 | } | |
326 | ||
327 | release_fw: | |
328 | release_firmware(fw); | |
329 | ||
330 | exit: | |
331 | clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags); | |
332 | return rc; | |
333 | } | |
334 | ||
93aead46 IE |
335 | /* Called by ST when registration is complete */ |
336 | static void nfcwilink_register_complete(void *priv_data, char data) | |
337 | { | |
338 | struct nfcwilink *drv = priv_data; | |
339 | ||
340 | nfc_dev_dbg(&drv->pdev->dev, "register_complete entry"); | |
341 | ||
342 | /* store ST registration status */ | |
343 | drv->st_register_cb_status = data; | |
344 | ||
345 | /* complete the wait in nfc_st_open() */ | |
1195d89b | 346 | complete(&drv->completed); |
93aead46 IE |
347 | } |
348 | ||
349 | /* Called by ST when receive data is available */ | |
350 | static long nfcwilink_receive(void *priv_data, struct sk_buff *skb) | |
351 | { | |
352 | struct nfcwilink *drv = priv_data; | |
353 | int rc; | |
354 | ||
93aead46 IE |
355 | if (!skb) |
356 | return -EFAULT; | |
357 | ||
358 | if (!drv) { | |
359 | kfree_skb(skb); | |
360 | return -EFAULT; | |
361 | } | |
362 | ||
d6650a2c WY |
363 | nfc_dev_dbg(&drv->pdev->dev, "receive entry, len %d", skb->len); |
364 | ||
93aead46 IE |
365 | /* strip the ST header |
366 | (apart for the chnl byte, which is not received in the hdr) */ | |
367 | skb_pull(skb, (NFCWILINK_HDR_LEN-1)); | |
368 | ||
1195d89b IE |
369 | if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) { |
370 | nfcwilink_fw_download_receive(drv, skb); | |
371 | return 0; | |
372 | } | |
373 | ||
93aead46 IE |
374 | skb->dev = (void *) drv->ndev; |
375 | ||
376 | /* Forward skb to NCI core layer */ | |
377 | rc = nci_recv_frame(skb); | |
378 | if (rc < 0) { | |
379 | nfc_dev_err(&drv->pdev->dev, "nci_recv_frame failed %d", rc); | |
380 | return rc; | |
381 | } | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | /* protocol structure registered with ST */ | |
387 | static struct st_proto_s nfcwilink_proto = { | |
388 | .chnl_id = NFCWILINK_CHNL, | |
389 | .max_frame_size = NFCWILINK_MAX_FRAME_SIZE, | |
390 | .hdr_len = (NFCWILINK_HDR_LEN-1), /* not including chnl byte */ | |
391 | .offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR, | |
392 | .len_size = NFCWILINK_LEN_SIZE, | |
393 | .reserve = 0, | |
394 | .recv = nfcwilink_receive, | |
395 | .reg_complete_cb = nfcwilink_register_complete, | |
396 | .write = NULL, | |
397 | }; | |
398 | ||
399 | static int nfcwilink_open(struct nci_dev *ndev) | |
400 | { | |
401 | struct nfcwilink *drv = nci_get_drvdata(ndev); | |
402 | unsigned long comp_ret; | |
403 | int rc; | |
404 | ||
405 | nfc_dev_dbg(&drv->pdev->dev, "open entry"); | |
406 | ||
407 | if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) { | |
408 | rc = -EBUSY; | |
409 | goto exit; | |
410 | } | |
411 | ||
412 | nfcwilink_proto.priv_data = drv; | |
413 | ||
1195d89b | 414 | init_completion(&drv->completed); |
93aead46 IE |
415 | drv->st_register_cb_status = -EINPROGRESS; |
416 | ||
417 | rc = st_register(&nfcwilink_proto); | |
418 | if (rc < 0) { | |
419 | if (rc == -EINPROGRESS) { | |
420 | comp_ret = wait_for_completion_timeout( | |
1195d89b | 421 | &drv->completed, |
93aead46 IE |
422 | msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT)); |
423 | ||
424 | nfc_dev_dbg(&drv->pdev->dev, | |
425 | "wait_for_completion_timeout returned %ld", | |
426 | comp_ret); | |
427 | ||
428 | if (comp_ret == 0) { | |
429 | /* timeout */ | |
430 | rc = -ETIMEDOUT; | |
431 | goto clear_exit; | |
432 | } else if (drv->st_register_cb_status != 0) { | |
433 | rc = drv->st_register_cb_status; | |
434 | nfc_dev_err(&drv->pdev->dev, | |
435 | "st_register_cb failed %d", rc); | |
436 | goto clear_exit; | |
437 | } | |
438 | } else { | |
439 | nfc_dev_err(&drv->pdev->dev, | |
440 | "st_register failed %d", rc); | |
441 | goto clear_exit; | |
442 | } | |
443 | } | |
444 | ||
445 | /* st_register MUST fill the write callback */ | |
446 | BUG_ON(nfcwilink_proto.write == NULL); | |
447 | drv->st_write = nfcwilink_proto.write; | |
448 | ||
1195d89b IE |
449 | if (nfcwilink_download_fw(drv)) { |
450 | nfc_dev_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d", | |
451 | rc); | |
452 | /* open should succeed, even if the FW download failed */ | |
453 | } | |
454 | ||
93aead46 IE |
455 | goto exit; |
456 | ||
457 | clear_exit: | |
458 | clear_bit(NFCWILINK_RUNNING, &drv->flags); | |
459 | ||
460 | exit: | |
461 | return rc; | |
462 | } | |
463 | ||
464 | static int nfcwilink_close(struct nci_dev *ndev) | |
465 | { | |
466 | struct nfcwilink *drv = nci_get_drvdata(ndev); | |
467 | int rc; | |
468 | ||
469 | nfc_dev_dbg(&drv->pdev->dev, "close entry"); | |
470 | ||
471 | if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags)) | |
472 | return 0; | |
473 | ||
474 | rc = st_unregister(&nfcwilink_proto); | |
475 | if (rc) | |
476 | nfc_dev_err(&drv->pdev->dev, "st_unregister failed %d", rc); | |
477 | ||
478 | drv->st_write = NULL; | |
479 | ||
480 | return rc; | |
481 | } | |
482 | ||
483 | static int nfcwilink_send(struct sk_buff *skb) | |
484 | { | |
485 | struct nci_dev *ndev = (struct nci_dev *)skb->dev; | |
486 | struct nfcwilink *drv = nci_get_drvdata(ndev); | |
487 | struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000}; | |
488 | long len; | |
489 | ||
490 | nfc_dev_dbg(&drv->pdev->dev, "send entry, len %d", skb->len); | |
491 | ||
ea9917d6 IE |
492 | if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) { |
493 | kfree_skb(skb); | |
494 | return -EINVAL; | |
495 | } | |
93aead46 IE |
496 | |
497 | /* add the ST hdr to the start of the buffer */ | |
3ed1326d | 498 | hdr.len = cpu_to_le16(skb->len); |
93aead46 IE |
499 | memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN); |
500 | ||
501 | /* Insert skb to shared transport layer's transmit queue. | |
502 | * Freeing skb memory is taken care in shared transport layer, | |
503 | * so don't free skb memory here. | |
504 | */ | |
505 | len = drv->st_write(skb); | |
506 | if (len < 0) { | |
507 | kfree_skb(skb); | |
508 | nfc_dev_err(&drv->pdev->dev, "st_write failed %ld", len); | |
509 | return -EFAULT; | |
510 | } | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | static struct nci_ops nfcwilink_ops = { | |
516 | .open = nfcwilink_open, | |
517 | .close = nfcwilink_close, | |
518 | .send = nfcwilink_send, | |
519 | }; | |
520 | ||
521 | static int nfcwilink_probe(struct platform_device *pdev) | |
522 | { | |
523 | static struct nfcwilink *drv; | |
524 | int rc; | |
3ed1326d | 525 | __u32 protocols; |
93aead46 IE |
526 | |
527 | nfc_dev_dbg(&pdev->dev, "probe entry"); | |
528 | ||
5f4d6214 | 529 | drv = devm_kzalloc(&pdev->dev, sizeof(struct nfcwilink), GFP_KERNEL); |
93aead46 IE |
530 | if (!drv) { |
531 | rc = -ENOMEM; | |
532 | goto exit; | |
533 | } | |
534 | ||
535 | drv->pdev = pdev; | |
536 | ||
537 | protocols = NFC_PROTO_JEWEL_MASK | |
01d719a2 SO |
538 | | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK |
539 | | NFC_PROTO_ISO14443_MASK | |
540 | | NFC_PROTO_ISO14443_B_MASK | |
541 | | NFC_PROTO_NFC_DEP_MASK; | |
93aead46 IE |
542 | |
543 | drv->ndev = nci_allocate_device(&nfcwilink_ops, | |
544 | protocols, | |
390a1bd8 | 545 | NFC_SE_NONE, |
93aead46 IE |
546 | NFCWILINK_HDR_LEN, |
547 | 0); | |
548 | if (!drv->ndev) { | |
549 | nfc_dev_err(&pdev->dev, "nci_allocate_device failed"); | |
550 | rc = -ENOMEM; | |
5f4d6214 | 551 | goto exit; |
93aead46 IE |
552 | } |
553 | ||
554 | nci_set_parent_dev(drv->ndev, &pdev->dev); | |
555 | nci_set_drvdata(drv->ndev, drv); | |
556 | ||
557 | rc = nci_register_device(drv->ndev); | |
558 | if (rc < 0) { | |
559 | nfc_dev_err(&pdev->dev, "nci_register_device failed %d", rc); | |
560 | goto free_dev_exit; | |
561 | } | |
562 | ||
563 | dev_set_drvdata(&pdev->dev, drv); | |
564 | ||
565 | goto exit; | |
566 | ||
567 | free_dev_exit: | |
568 | nci_free_device(drv->ndev); | |
569 | ||
93aead46 IE |
570 | exit: |
571 | return rc; | |
572 | } | |
573 | ||
574 | static int nfcwilink_remove(struct platform_device *pdev) | |
575 | { | |
576 | struct nfcwilink *drv = dev_get_drvdata(&pdev->dev); | |
577 | struct nci_dev *ndev; | |
578 | ||
579 | nfc_dev_dbg(&pdev->dev, "remove entry"); | |
580 | ||
581 | if (!drv) | |
582 | return -EFAULT; | |
583 | ||
584 | ndev = drv->ndev; | |
585 | ||
586 | nci_unregister_device(ndev); | |
587 | nci_free_device(ndev); | |
588 | ||
93aead46 IE |
589 | dev_set_drvdata(&pdev->dev, NULL); |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | static struct platform_driver nfcwilink_driver = { | |
595 | .probe = nfcwilink_probe, | |
596 | .remove = nfcwilink_remove, | |
597 | .driver = { | |
598 | .name = "nfcwilink", | |
599 | .owner = THIS_MODULE, | |
600 | }, | |
601 | }; | |
602 | ||
058576dd | 603 | module_platform_driver(nfcwilink_driver); |
93aead46 IE |
604 | |
605 | /* ------ Module Info ------ */ | |
606 | ||
607 | MODULE_AUTHOR("Ilan Elias <ilane@ti.com>"); | |
608 | MODULE_DESCRIPTION("NFC Driver for TI Shared Transport"); | |
609 | MODULE_LICENSE("GPL"); |