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29#include <linux/platform_device.h>
30#include <linux/module.h>
31#include <linux/types.h>
32#include <linux/firmware.h>
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
45#define NFCWILINK_CMD_TIMEOUT 5000
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
56
57struct nfcwilink_hdr {
58 __u8 chnl;
59 __u8 opcode;
60 __le16 len;
61} __packed;
62
63struct nci_vs_nfcc_info_cmd {
64 __u8 gid;
65 __u8 oid;
66 __u8 plen;
67} __packed;
68
69struct 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
80struct bts_file_hdr {
81 __le32 magic;
82 __le32 ver;
83 __u8 rfu[24];
84 __u8 actions[0];
85} __packed;
86
87struct bts_file_action {
88 __le16 type;
89 __le16 len;
90 __u8 data[0];
91} __packed;
92
93struct 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 *);
100
101 struct completion completed;
102
103 struct nci_vs_nfcc_info_rsp nfcc_info;
104};
105
106
107enum {
108 NFCWILINK_RUNNING,
109 NFCWILINK_FW_DOWNLOAD,
110};
111
112static int nfcwilink_send(struct nci_dev *ndev, struct sk_buff *skb);
113
114static 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
125static 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
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
142static 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 cmd = (struct nci_vs_nfcc_info_cmd *)
160 skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd));
161 cmd->gid = NCI_VS_NFCC_INFO_CMD_GID;
162 cmd->oid = NCI_VS_NFCC_INFO_CMD_OID;
163 cmd->plen = 0;
164
165 drv->nfcc_info.plen = 0;
166
167 rc = nfcwilink_send(drv->ndev, skb);
168 if (rc)
169 return rc;
170
171 comp_ret = wait_for_completion_timeout(&drv->completed,
172 msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
173 nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld",
174 comp_ret);
175 if (comp_ret == 0) {
176 nfc_dev_err(&drv->pdev->dev,
177 "timeout on wait_for_completion_timeout");
178 return -ETIMEDOUT;
179 }
180
181 nfc_dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d",
182 drv->nfcc_info.plen,
183 drv->nfcc_info.status);
184
185 if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) {
186 nfc_dev_err(&drv->pdev->dev,
187 "invalid nci_vs_nfcc_info_rsp");
188 return -EINVAL;
189 }
190
191 snprintf(file_name, BTS_FILE_NAME_MAX_SIZE,
192 "TINfcInit_%d.%d.%d.%d.bts",
193 drv->nfcc_info.hw_id,
194 drv->nfcc_info.sw_ver_x,
195 drv->nfcc_info.sw_ver_z,
196 drv->nfcc_info.patch_id);
197
198 nfc_dev_info(&drv->pdev->dev, "nfcwilink FW file name: %s", file_name);
199
200 return 0;
201}
202
203static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len)
204{
205 struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data;
206 struct sk_buff *skb;
207 unsigned long comp_ret;
208 int rc;
209
210 nfc_dev_dbg(&drv->pdev->dev, "send_bts_cmd entry");
211
212
213 if ((len <= sizeof(struct nfcwilink_hdr)) ||
214 (len > BTS_FILE_CMD_MAX_LEN) ||
215 (hdr->chnl != NFCWILINK_CHNL) ||
216 (hdr->opcode != NFCWILINK_OPCODE)) {
217 nfc_dev_err(&drv->pdev->dev,
218 "ignoring invalid bts cmd, len %d, chnl %d, opcode %d",
219 len, hdr->chnl, hdr->opcode);
220 return 0;
221 }
222
223
224 len -= sizeof(struct nfcwilink_hdr);
225 data += sizeof(struct nfcwilink_hdr);
226
227 skb = nfcwilink_skb_alloc(len, GFP_KERNEL);
228 if (!skb) {
229 nfc_dev_err(&drv->pdev->dev, "no memory for bts cmd");
230 return -ENOMEM;
231 }
232
233 memcpy(skb_put(skb, len), data, len);
234
235 rc = nfcwilink_send(drv->ndev, skb);
236 if (rc)
237 return rc;
238
239 comp_ret = wait_for_completion_timeout(&drv->completed,
240 msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
241 nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld",
242 comp_ret);
243 if (comp_ret == 0) {
244 nfc_dev_err(&drv->pdev->dev,
245 "timeout on wait_for_completion_timeout");
246 return -ETIMEDOUT;
247 }
248
249 return 0;
250}
251
252static int nfcwilink_download_fw(struct nfcwilink *drv)
253{
254 unsigned char file_name[BTS_FILE_NAME_MAX_SIZE];
255 const struct firmware *fw;
256 __u16 action_type, action_len;
257 __u8 *ptr;
258 int len, rc;
259
260 nfc_dev_dbg(&drv->pdev->dev, "download_fw entry");
261
262 set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
263
264 rc = nfcwilink_get_bts_file_name(drv, file_name);
265 if (rc)
266 goto exit;
267
268 rc = request_firmware(&fw, file_name, &drv->pdev->dev);
269 if (rc) {
270 nfc_dev_err(&drv->pdev->dev, "request_firmware failed %d", rc);
271
272
273 if (rc == -ENOENT)
274 rc = 0;
275
276 goto exit;
277 }
278
279 len = fw->size;
280 ptr = (__u8 *)fw->data;
281
282 if ((len == 0) || (ptr == NULL)) {
283 nfc_dev_dbg(&drv->pdev->dev,
284 "request_firmware returned size %d", len);
285 goto release_fw;
286 }
287
288 if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) !=
289 BTS_FILE_HDR_MAGIC) {
290 nfc_dev_err(&drv->pdev->dev, "wrong bts magic number");
291 rc = -EINVAL;
292 goto release_fw;
293 }
294
295
296 len -= sizeof(struct bts_file_hdr);
297 ptr += sizeof(struct bts_file_hdr);
298
299 while (len > 0) {
300 action_type =
301 __le16_to_cpu(((struct bts_file_action *)ptr)->type);
302 action_len =
303 __le16_to_cpu(((struct bts_file_action *)ptr)->len);
304
305 nfc_dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d",
306 action_type, action_len);
307
308 switch (action_type) {
309 case BTS_FILE_ACTION_TYPE_SEND_CMD:
310 rc = nfcwilink_send_bts_cmd(drv,
311 ((struct bts_file_action *)ptr)->data,
312 action_len);
313 if (rc)
314 goto release_fw;
315 break;
316 }
317
318
319 len -= (sizeof(struct bts_file_action) + action_len);
320 ptr += (sizeof(struct bts_file_action) + action_len);
321 }
322
323release_fw:
324 release_firmware(fw);
325
326exit:
327 clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
328 return rc;
329}
330
331
332static void nfcwilink_register_complete(void *priv_data, char data)
333{
334 struct nfcwilink *drv = priv_data;
335
336 nfc_dev_dbg(&drv->pdev->dev, "register_complete entry");
337
338
339 drv->st_register_cb_status = data;
340
341
342 complete(&drv->completed);
343}
344
345
346static long nfcwilink_receive(void *priv_data, struct sk_buff *skb)
347{
348 struct nfcwilink *drv = priv_data;
349 int rc;
350
351 if (!skb)
352 return -EFAULT;
353
354 if (!drv) {
355 kfree_skb(skb);
356 return -EFAULT;
357 }
358
359 nfc_dev_dbg(&drv->pdev->dev, "receive entry, len %d", skb->len);
360
361
362
363 skb_pull(skb, (NFCWILINK_HDR_LEN-1));
364
365 if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) {
366 nfcwilink_fw_download_receive(drv, skb);
367 return 0;
368 }
369
370
371 rc = nci_recv_frame(drv->ndev, skb);
372 if (rc < 0) {
373 nfc_dev_err(&drv->pdev->dev, "nci_recv_frame failed %d", rc);
374 return rc;
375 }
376
377 return 0;
378}
379
380
381static struct st_proto_s nfcwilink_proto = {
382 .chnl_id = NFCWILINK_CHNL,
383 .max_frame_size = NFCWILINK_MAX_FRAME_SIZE,
384 .hdr_len = (NFCWILINK_HDR_LEN-1),
385 .offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR,
386 .len_size = NFCWILINK_LEN_SIZE,
387 .reserve = 0,
388 .recv = nfcwilink_receive,
389 .reg_complete_cb = nfcwilink_register_complete,
390 .write = NULL,
391};
392
393static int nfcwilink_open(struct nci_dev *ndev)
394{
395 struct nfcwilink *drv = nci_get_drvdata(ndev);
396 unsigned long comp_ret;
397 int rc;
398
399 nfc_dev_dbg(&drv->pdev->dev, "open entry");
400
401 if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) {
402 rc = -EBUSY;
403 goto exit;
404 }
405
406 nfcwilink_proto.priv_data = drv;
407
408 init_completion(&drv->completed);
409 drv->st_register_cb_status = -EINPROGRESS;
410
411 rc = st_register(&nfcwilink_proto);
412 if (rc < 0) {
413 if (rc == -EINPROGRESS) {
414 comp_ret = wait_for_completion_timeout(
415 &drv->completed,
416 msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT));
417
418 nfc_dev_dbg(&drv->pdev->dev,
419 "wait_for_completion_timeout returned %ld",
420 comp_ret);
421
422 if (comp_ret == 0) {
423
424 rc = -ETIMEDOUT;
425 goto clear_exit;
426 } else if (drv->st_register_cb_status != 0) {
427 rc = drv->st_register_cb_status;
428 nfc_dev_err(&drv->pdev->dev,
429 "st_register_cb failed %d", rc);
430 goto clear_exit;
431 }
432 } else {
433 nfc_dev_err(&drv->pdev->dev,
434 "st_register failed %d", rc);
435 goto clear_exit;
436 }
437 }
438
439
440 BUG_ON(nfcwilink_proto.write == NULL);
441 drv->st_write = nfcwilink_proto.write;
442
443 if (nfcwilink_download_fw(drv)) {
444 nfc_dev_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d",
445 rc);
446
447 }
448
449 goto exit;
450
451clear_exit:
452 clear_bit(NFCWILINK_RUNNING, &drv->flags);
453
454exit:
455 return rc;
456}
457
458static int nfcwilink_close(struct nci_dev *ndev)
459{
460 struct nfcwilink *drv = nci_get_drvdata(ndev);
461 int rc;
462
463 nfc_dev_dbg(&drv->pdev->dev, "close entry");
464
465 if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags))
466 return 0;
467
468 rc = st_unregister(&nfcwilink_proto);
469 if (rc)
470 nfc_dev_err(&drv->pdev->dev, "st_unregister failed %d", rc);
471
472 drv->st_write = NULL;
473
474 return rc;
475}
476
477static int nfcwilink_send(struct nci_dev *ndev, struct sk_buff *skb)
478{
479 struct nfcwilink *drv = nci_get_drvdata(ndev);
480 struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000};
481 long len;
482
483 nfc_dev_dbg(&drv->pdev->dev, "send entry, len %d", skb->len);
484
485 if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) {
486 kfree_skb(skb);
487 return -EINVAL;
488 }
489
490
491 hdr.len = cpu_to_le16(skb->len);
492 memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN);
493
494
495
496
497
498 len = drv->st_write(skb);
499 if (len < 0) {
500 kfree_skb(skb);
501 nfc_dev_err(&drv->pdev->dev, "st_write failed %ld", len);
502 return -EFAULT;
503 }
504
505 return 0;
506}
507
508static struct nci_ops nfcwilink_ops = {
509 .open = nfcwilink_open,
510 .close = nfcwilink_close,
511 .send = nfcwilink_send,
512};
513
514static int nfcwilink_probe(struct platform_device *pdev)
515{
516 static struct nfcwilink *drv;
517 int rc;
518 __u32 protocols;
519
520 nfc_dev_dbg(&pdev->dev, "probe entry");
521
522 drv = devm_kzalloc(&pdev->dev, sizeof(struct nfcwilink), GFP_KERNEL);
523 if (!drv) {
524 rc = -ENOMEM;
525 goto exit;
526 }
527
528 drv->pdev = pdev;
529
530 protocols = NFC_PROTO_JEWEL_MASK
531 | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
532 | NFC_PROTO_ISO14443_MASK
533 | NFC_PROTO_ISO14443_B_MASK
534 | NFC_PROTO_NFC_DEP_MASK;
535
536 drv->ndev = nci_allocate_device(&nfcwilink_ops,
537 protocols,
538 NFCWILINK_HDR_LEN,
539 0);
540 if (!drv->ndev) {
541 nfc_dev_err(&pdev->dev, "nci_allocate_device failed");
542 rc = -ENOMEM;
543 goto exit;
544 }
545
546 nci_set_parent_dev(drv->ndev, &pdev->dev);
547 nci_set_drvdata(drv->ndev, drv);
548
549 rc = nci_register_device(drv->ndev);
550 if (rc < 0) {
551 nfc_dev_err(&pdev->dev, "nci_register_device failed %d", rc);
552 goto free_dev_exit;
553 }
554
555 dev_set_drvdata(&pdev->dev, drv);
556
557 goto exit;
558
559free_dev_exit:
560 nci_free_device(drv->ndev);
561
562exit:
563 return rc;
564}
565
566static int nfcwilink_remove(struct platform_device *pdev)
567{
568 struct nfcwilink *drv = dev_get_drvdata(&pdev->dev);
569 struct nci_dev *ndev;
570
571 nfc_dev_dbg(&pdev->dev, "remove entry");
572
573 if (!drv)
574 return -EFAULT;
575
576 ndev = drv->ndev;
577
578 nci_unregister_device(ndev);
579 nci_free_device(ndev);
580
581 dev_set_drvdata(&pdev->dev, NULL);
582
583 return 0;
584}
585
586static struct platform_driver nfcwilink_driver = {
587 .probe = nfcwilink_probe,
588 .remove = nfcwilink_remove,
589 .driver = {
590 .name = "nfcwilink",
591 .owner = THIS_MODULE,
592 },
593};
594
595module_platform_driver(nfcwilink_driver);
596
597
598
599MODULE_AUTHOR("Ilan Elias <ilane@ti.com>");
600MODULE_DESCRIPTION("NFC Driver for TI Shared Transport");
601MODULE_LICENSE("GPL");
602
