GNU Linux-libre 4.19.314-gnu1
[releases.git] / drivers / nfc / st-nci / vendor_cmds.c
1 /*
2  * Proprietary commands extension for STMicroelectronics NFC NCI Chip
3  *
4  * Copyright (C) 2014-2015  STMicroelectronics SAS. All rights reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms and conditions of the GNU General Public License,
8  * version 2, as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
17  */
18
19 #include <net/genetlink.h>
20 #include <linux/module.h>
21 #include <linux/nfc.h>
22 #include <linux/delay.h>
23 #include <net/nfc/nci_core.h>
24
25 #include "st-nci.h"
26
27 #define ST_NCI_HCI_DM_GETDATA                   0x10
28 #define ST_NCI_HCI_DM_PUTDATA                   0x11
29 #define ST_NCI_HCI_DM_LOAD                      0x12
30 #define ST_NCI_HCI_DM_GETINFO                   0x13
31 #define ST_NCI_HCI_DM_FWUPD_START               0x14
32 #define ST_NCI_HCI_DM_FWUPD_STOP                0x15
33 #define ST_NCI_HCI_DM_UPDATE_AID                0x20
34 #define ST_NCI_HCI_DM_RESET                     0x3e
35
36 #define ST_NCI_HCI_DM_FIELD_GENERATOR           0x32
37 #define ST_NCI_HCI_DM_VDC_MEASUREMENT_VALUE     0x33
38 #define ST_NCI_HCI_DM_VDC_VALUE_COMPARISON      0x34
39
40 #define ST_NCI_FACTORY_MODE_ON                  1
41 #define ST_NCI_FACTORY_MODE_OFF                 0
42
43 #define ST_NCI_EVT_POST_DATA                    0x02
44
45 struct get_param_data {
46         u8 gate;
47         u8 data;
48 } __packed;
49
50 static int st_nci_factory_mode(struct nfc_dev *dev, void *data,
51                                size_t data_len)
52 {
53         struct nci_dev *ndev = nfc_get_drvdata(dev);
54         struct st_nci_info *info = nci_get_drvdata(ndev);
55
56         if (data_len != 1)
57                 return -EINVAL;
58
59         pr_debug("factory mode: %x\n", ((u8 *)data)[0]);
60
61         switch (((u8 *)data)[0]) {
62         case ST_NCI_FACTORY_MODE_ON:
63                 test_and_set_bit(ST_NCI_FACTORY_MODE, &info->flags);
64         break;
65         case ST_NCI_FACTORY_MODE_OFF:
66                 clear_bit(ST_NCI_FACTORY_MODE, &info->flags);
67         break;
68         default:
69                 return -EINVAL;
70         }
71
72         return 0;
73 }
74
75 static int st_nci_hci_clear_all_pipes(struct nfc_dev *dev, void *data,
76                                       size_t data_len)
77 {
78         struct nci_dev *ndev = nfc_get_drvdata(dev);
79
80         return nci_hci_clear_all_pipes(ndev);
81 }
82
83 static int st_nci_hci_dm_put_data(struct nfc_dev *dev, void *data,
84                                   size_t data_len)
85 {
86         struct nci_dev *ndev = nfc_get_drvdata(dev);
87
88         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
89                                 ST_NCI_HCI_DM_PUTDATA, data,
90                                 data_len, NULL);
91 }
92
93 static int st_nci_hci_dm_update_aid(struct nfc_dev *dev, void *data,
94                                     size_t data_len)
95 {
96         struct nci_dev *ndev = nfc_get_drvdata(dev);
97
98         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
99                         ST_NCI_HCI_DM_UPDATE_AID, data, data_len, NULL);
100 }
101
102 static int st_nci_hci_dm_get_info(struct nfc_dev *dev, void *data,
103                                   size_t data_len)
104 {
105         int r;
106         struct sk_buff *msg, *skb;
107         struct nci_dev *ndev = nfc_get_drvdata(dev);
108
109         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, ST_NCI_HCI_DM_GETINFO,
110                              data, data_len, &skb);
111         if (r)
112                 goto exit;
113
114         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
115                                              HCI_DM_GET_INFO, skb->len);
116         if (!msg) {
117                 r = -ENOMEM;
118                 goto free_skb;
119         }
120
121         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
122                 kfree_skb(msg);
123                 r = -ENOBUFS;
124                 goto free_skb;
125         }
126
127         r = nfc_vendor_cmd_reply(msg);
128
129 free_skb:
130         kfree_skb(skb);
131 exit:
132         return r;
133 }
134
135 static int st_nci_hci_dm_get_data(struct nfc_dev *dev, void *data,
136                                   size_t data_len)
137 {
138         int r;
139         struct sk_buff *msg, *skb;
140         struct nci_dev *ndev = nfc_get_drvdata(dev);
141
142         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, ST_NCI_HCI_DM_GETDATA,
143                              data, data_len, &skb);
144         if (r)
145                 goto exit;
146
147         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
148                                              HCI_DM_GET_DATA, skb->len);
149         if (!msg) {
150                 r = -ENOMEM;
151                 goto free_skb;
152         }
153
154         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
155                 kfree_skb(msg);
156                 r = -ENOBUFS;
157                 goto free_skb;
158         }
159
160         r = nfc_vendor_cmd_reply(msg);
161
162 free_skb:
163         kfree_skb(skb);
164 exit:
165         return r;
166 }
167
168 static int st_nci_hci_dm_fwupd_start(struct nfc_dev *dev, void *data,
169                                      size_t data_len)
170 {
171         int r;
172         struct nci_dev *ndev = nfc_get_drvdata(dev);
173
174         dev->fw_download_in_progress = true;
175         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
176                         ST_NCI_HCI_DM_FWUPD_START, data, data_len, NULL);
177         if (r)
178                 dev->fw_download_in_progress = false;
179
180         return r;
181 }
182
183 static int st_nci_hci_dm_fwupd_end(struct nfc_dev *dev, void *data,
184                                    size_t data_len)
185 {
186         struct nci_dev *ndev = nfc_get_drvdata(dev);
187
188         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
189                         ST_NCI_HCI_DM_FWUPD_STOP, data, data_len, NULL);
190 }
191
192 static int st_nci_hci_dm_direct_load(struct nfc_dev *dev, void *data,
193                                      size_t data_len)
194 {
195         struct nci_dev *ndev = nfc_get_drvdata(dev);
196
197         if (dev->fw_download_in_progress) {
198                 dev->fw_download_in_progress = false;
199                 return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
200                                 ST_NCI_HCI_DM_LOAD, data, data_len, NULL);
201         }
202         return -EPROTO;
203 }
204
205 static int st_nci_hci_dm_reset(struct nfc_dev *dev, void *data,
206                                size_t data_len)
207 {
208         struct nci_dev *ndev = nfc_get_drvdata(dev);
209
210         nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
211                         ST_NCI_HCI_DM_RESET, data, data_len, NULL);
212         msleep(200);
213
214         return 0;
215 }
216
217 static int st_nci_hci_get_param(struct nfc_dev *dev, void *data,
218                                 size_t data_len)
219 {
220         int r;
221         struct sk_buff *msg, *skb;
222         struct nci_dev *ndev = nfc_get_drvdata(dev);
223         struct get_param_data *param = (struct get_param_data *)data;
224
225         if (data_len < sizeof(struct get_param_data))
226                 return -EPROTO;
227
228         r = nci_hci_get_param(ndev, param->gate, param->data, &skb);
229         if (r)
230                 goto exit;
231
232         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
233                                              HCI_GET_PARAM, skb->len);
234         if (!msg) {
235                 r = -ENOMEM;
236                 goto free_skb;
237         }
238
239         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
240                 kfree_skb(msg);
241                 r = -ENOBUFS;
242                 goto free_skb;
243         }
244
245         r = nfc_vendor_cmd_reply(msg);
246
247 free_skb:
248         kfree_skb(skb);
249 exit:
250         return r;
251 }
252
253 static int st_nci_hci_dm_field_generator(struct nfc_dev *dev, void *data,
254                                          size_t data_len)
255 {
256         struct nci_dev *ndev = nfc_get_drvdata(dev);
257
258         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
259                                 ST_NCI_HCI_DM_FIELD_GENERATOR, data, data_len, NULL);
260 }
261
262 static int st_nci_hci_dm_vdc_measurement_value(struct nfc_dev *dev, void *data,
263                                                size_t data_len)
264 {
265         int r;
266         struct sk_buff *msg, *skb;
267         struct nci_dev *ndev = nfc_get_drvdata(dev);
268
269         if (data_len != 4)
270                 return -EPROTO;
271
272         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
273                              ST_NCI_HCI_DM_VDC_MEASUREMENT_VALUE,
274                              data, data_len, &skb);
275         if (r)
276                 goto exit;
277
278         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
279                                 HCI_DM_VDC_MEASUREMENT_VALUE, skb->len);
280         if (!msg) {
281                 r = -ENOMEM;
282                 goto free_skb;
283         }
284
285         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
286                 kfree_skb(msg);
287                 r = -ENOBUFS;
288                 goto free_skb;
289         }
290
291         r = nfc_vendor_cmd_reply(msg);
292
293 free_skb:
294         kfree_skb(skb);
295 exit:
296         return r;
297 }
298
299 static int st_nci_hci_dm_vdc_value_comparison(struct nfc_dev *dev, void *data,
300                                               size_t data_len)
301 {
302         int r;
303         struct sk_buff *msg, *skb;
304         struct nci_dev *ndev = nfc_get_drvdata(dev);
305
306         if (data_len != 2)
307                 return -EPROTO;
308
309         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
310                              ST_NCI_HCI_DM_VDC_VALUE_COMPARISON,
311                              data, data_len, &skb);
312         if (r)
313                 goto exit;
314
315         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
316                                         HCI_DM_VDC_VALUE_COMPARISON, skb->len);
317         if (!msg) {
318                 r = -ENOMEM;
319                 goto free_skb;
320         }
321
322         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
323                 kfree_skb(msg);
324                 r = -ENOBUFS;
325                 goto free_skb;
326         }
327
328         r = nfc_vendor_cmd_reply(msg);
329
330 free_skb:
331         kfree_skb(skb);
332 exit:
333         return r;
334 }
335
336 static int st_nci_loopback(struct nfc_dev *dev, void *data,
337                            size_t data_len)
338 {
339         int r;
340         struct sk_buff *msg, *skb;
341         struct nci_dev *ndev = nfc_get_drvdata(dev);
342
343         if (data_len <= 0)
344                 return -EPROTO;
345
346         r = nci_nfcc_loopback(ndev, data, data_len, &skb);
347         if (r < 0)
348                 return r;
349
350         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
351                                              LOOPBACK, skb->len);
352         if (!msg) {
353                 r = -ENOMEM;
354                 goto free_skb;
355         }
356
357         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
358                 kfree_skb(msg);
359                 r = -ENOBUFS;
360                 goto free_skb;
361         }
362
363         r = nfc_vendor_cmd_reply(msg);
364 free_skb:
365         kfree_skb(skb);
366         return r;
367 }
368
369 static int st_nci_manufacturer_specific(struct nfc_dev *dev, void *data,
370                                         size_t data_len)
371 {
372         struct sk_buff *msg;
373         struct nci_dev *ndev = nfc_get_drvdata(dev);
374
375         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
376                                         MANUFACTURER_SPECIFIC,
377                                         sizeof(ndev->manufact_specific_info));
378         if (!msg)
379                 return -ENOMEM;
380
381         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, sizeof(ndev->manufact_specific_info),
382                     &ndev->manufact_specific_info)) {
383                 kfree_skb(msg);
384                 return -ENOBUFS;
385         }
386
387         return nfc_vendor_cmd_reply(msg);
388 }
389
390 static struct nfc_vendor_cmd st_nci_vendor_cmds[] = {
391         {
392                 .vendor_id = ST_NCI_VENDOR_OUI,
393                 .subcmd = FACTORY_MODE,
394                 .doit = st_nci_factory_mode,
395         },
396         {
397                 .vendor_id = ST_NCI_VENDOR_OUI,
398                 .subcmd = HCI_CLEAR_ALL_PIPES,
399                 .doit = st_nci_hci_clear_all_pipes,
400         },
401         {
402                 .vendor_id = ST_NCI_VENDOR_OUI,
403                 .subcmd = HCI_DM_PUT_DATA,
404                 .doit = st_nci_hci_dm_put_data,
405         },
406         {
407                 .vendor_id = ST_NCI_VENDOR_OUI,
408                 .subcmd = HCI_DM_UPDATE_AID,
409                 .doit = st_nci_hci_dm_update_aid,
410         },
411         {
412                 .vendor_id = ST_NCI_VENDOR_OUI,
413                 .subcmd = HCI_DM_GET_INFO,
414                 .doit = st_nci_hci_dm_get_info,
415         },
416         {
417                 .vendor_id = ST_NCI_VENDOR_OUI,
418                 .subcmd = HCI_DM_GET_DATA,
419                 .doit = st_nci_hci_dm_get_data,
420         },
421         {
422                 .vendor_id = ST_NCI_VENDOR_OUI,
423                 .subcmd = HCI_DM_DIRECT_LOAD,
424                 .doit = st_nci_hci_dm_direct_load,
425         },
426         {
427                 .vendor_id = ST_NCI_VENDOR_OUI,
428                 .subcmd = HCI_DM_RESET,
429                 .doit = st_nci_hci_dm_reset,
430         },
431         {
432                 .vendor_id = ST_NCI_VENDOR_OUI,
433                 .subcmd = HCI_GET_PARAM,
434                 .doit = st_nci_hci_get_param,
435         },
436         {
437                 .vendor_id = ST_NCI_VENDOR_OUI,
438                 .subcmd = HCI_DM_FIELD_GENERATOR,
439                 .doit = st_nci_hci_dm_field_generator,
440         },
441         {
442                 .vendor_id = ST_NCI_VENDOR_OUI,
443                 .subcmd = HCI_DM_FWUPD_START,
444                 .doit = st_nci_hci_dm_fwupd_start,
445         },
446         {
447                 .vendor_id = ST_NCI_VENDOR_OUI,
448                 .subcmd = HCI_DM_FWUPD_END,
449                 .doit = st_nci_hci_dm_fwupd_end,
450         },
451         {
452                 .vendor_id = ST_NCI_VENDOR_OUI,
453                 .subcmd = LOOPBACK,
454                 .doit = st_nci_loopback,
455         },
456         {
457                 .vendor_id = ST_NCI_VENDOR_OUI,
458                 .subcmd = HCI_DM_VDC_MEASUREMENT_VALUE,
459                 .doit = st_nci_hci_dm_vdc_measurement_value,
460         },
461         {
462                 .vendor_id = ST_NCI_VENDOR_OUI,
463                 .subcmd = HCI_DM_VDC_VALUE_COMPARISON,
464                 .doit = st_nci_hci_dm_vdc_value_comparison,
465         },
466         {
467                 .vendor_id = ST_NCI_VENDOR_OUI,
468                 .subcmd = MANUFACTURER_SPECIFIC,
469                 .doit = st_nci_manufacturer_specific,
470         },
471 };
472
473 int st_nci_vendor_cmds_init(struct nci_dev *ndev)
474 {
475         return nfc_set_vendor_cmds(ndev->nfc_dev, st_nci_vendor_cmds,
476                                    sizeof(st_nci_vendor_cmds));
477 }
478 EXPORT_SYMBOL(st_nci_vendor_cmds_init);