drivers/nfc/st-nci/vendor_cmds.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Proprietary commands extension for STMicroelectronics NFC NCI Chip
   4  *
   5  * Copyright (C) 2014-2015  STMicroelectronics SAS. All rights reserved.
   6  */
   7
   8 #include <net/genetlink.h>
   9 #include <linux/module.h>
  10 #include <linux/nfc.h>
  11 #include <linux/delay.h>
  12 #include <net/nfc/nci_core.h>
  13
  14 #include "st-nci.h"
  15
  16 #define ST_NCI_HCI_DM_GETDATA                   0x10
  17 #define ST_NCI_HCI_DM_PUTDATA                   0x11
  18 #define ST_NCI_HCI_DM_LOAD                      0x12
  19 #define ST_NCI_HCI_DM_GETINFO                   0x13
  20 #define ST_NCI_HCI_DM_FWUPD_START               0x14
  21 #define ST_NCI_HCI_DM_FWUPD_STOP                0x15
  22 #define ST_NCI_HCI_DM_UPDATE_AID                0x20
  23 #define ST_NCI_HCI_DM_RESET                     0x3e
  24
  25 #define ST_NCI_HCI_DM_FIELD_GENERATOR           0x32
  26 #define ST_NCI_HCI_DM_VDC_MEASUREMENT_VALUE     0x33
  27 #define ST_NCI_HCI_DM_VDC_VALUE_COMPARISON      0x34
  28
  29 #define ST_NCI_FACTORY_MODE_ON                  1
  30 #define ST_NCI_FACTORY_MODE_OFF                 0
  31
  32 #define ST_NCI_EVT_POST_DATA                    0x02
  33
  34 struct get_param_data {
  35         u8 gate;
  36         u8 data;
  37 } __packed;
  38
  39 static int st_nci_factory_mode(struct nfc_dev *dev, void *data,
  40                                size_t data_len)
  41 {
  42         struct nci_dev *ndev = nfc_get_drvdata(dev);
  43         struct st_nci_info *info = nci_get_drvdata(ndev);
  44
  45         if (data_len != 1)
  46                 return -EINVAL;
  47
  48         pr_debug("factory mode: %x\n", ((u8 *)data)[0]);
  49
  50         switch (((u8 *)data)[0]) {
  51         case ST_NCI_FACTORY_MODE_ON:
  52                 test_and_set_bit(ST_NCI_FACTORY_MODE, &info->flags);
  53         break;
  54         case ST_NCI_FACTORY_MODE_OFF:
  55                 clear_bit(ST_NCI_FACTORY_MODE, &info->flags);
  56         break;
  57         default:
  58                 return -EINVAL;
  59         }
  60
  61         return 0;
  62 }
  63
  64 static int st_nci_hci_clear_all_pipes(struct nfc_dev *dev, void *data,
  65                                       size_t data_len)
  66 {
  67         struct nci_dev *ndev = nfc_get_drvdata(dev);
  68
  69         return nci_hci_clear_all_pipes(ndev);
  70 }
  71
  72 static int st_nci_hci_dm_put_data(struct nfc_dev *dev, void *data,
  73                                   size_t data_len)
  74 {
  75         struct nci_dev *ndev = nfc_get_drvdata(dev);
  76
  77         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
  78                                 ST_NCI_HCI_DM_PUTDATA, data,
  79                                 data_len, NULL);
  80 }
  81
  82 static int st_nci_hci_dm_update_aid(struct nfc_dev *dev, void *data,
  83                                     size_t data_len)
  84 {
  85         struct nci_dev *ndev = nfc_get_drvdata(dev);
  86
  87         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
  88                         ST_NCI_HCI_DM_UPDATE_AID, data, data_len, NULL);
  89 }
  90
  91 static int st_nci_hci_dm_get_info(struct nfc_dev *dev, void *data,
  92                                   size_t data_len)
  93 {
  94         int r;
  95         struct sk_buff *msg, *skb;
  96         struct nci_dev *ndev = nfc_get_drvdata(dev);
  97
  98         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, ST_NCI_HCI_DM_GETINFO,
  99                              data, data_len, &skb);
 100         if (r)
 101                 return r;
 102
 103         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 104                                              HCI_DM_GET_INFO, skb->len);
 105         if (!msg) {
 106                 r = -ENOMEM;
 107                 goto free_skb;
 108         }
 109
 110         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
 111                 kfree_skb(msg);
 112                 r = -ENOBUFS;
 113                 goto free_skb;
 114         }
 115
 116         r = nfc_vendor_cmd_reply(msg);
 117
 118 free_skb:
 119         kfree_skb(skb);
 120         return r;
 121 }
 122
 123 static int st_nci_hci_dm_get_data(struct nfc_dev *dev, void *data,
 124                                   size_t data_len)
 125 {
 126         int r;
 127         struct sk_buff *msg, *skb;
 128         struct nci_dev *ndev = nfc_get_drvdata(dev);
 129
 130         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, ST_NCI_HCI_DM_GETDATA,
 131                              data, data_len, &skb);
 132         if (r)
 133                 return r;
 134
 135         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 136                                              HCI_DM_GET_DATA, skb->len);
 137         if (!msg) {
 138                 r = -ENOMEM;
 139                 goto free_skb;
 140         }
 141
 142         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
 143                 kfree_skb(msg);
 144                 r = -ENOBUFS;
 145                 goto free_skb;
 146         }
 147
 148         r = nfc_vendor_cmd_reply(msg);
 149
 150 free_skb:
 151         kfree_skb(skb);
 152         return r;
 153 }
 154
 155 static int st_nci_hci_dm_fwupd_start(struct nfc_dev *dev, void *data,
 156                                      size_t data_len)
 157 {
 158         int r;
 159         struct nci_dev *ndev = nfc_get_drvdata(dev);
 160
 161         dev->fw_download_in_progress = true;
 162         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 163                         ST_NCI_HCI_DM_FWUPD_START, data, data_len, NULL);
 164         if (r)
 165                 dev->fw_download_in_progress = false;
 166
 167         return r;
 168 }
 169
 170 static int st_nci_hci_dm_fwupd_end(struct nfc_dev *dev, void *data,
 171                                    size_t data_len)
 172 {
 173         struct nci_dev *ndev = nfc_get_drvdata(dev);
 174
 175         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 176                         ST_NCI_HCI_DM_FWUPD_STOP, data, data_len, NULL);
 177 }
 178
 179 static int st_nci_hci_dm_direct_load(struct nfc_dev *dev, void *data,
 180                                      size_t data_len)
 181 {
 182         struct nci_dev *ndev = nfc_get_drvdata(dev);
 183
 184         if (dev->fw_download_in_progress) {
 185                 dev->fw_download_in_progress = false;
 186                 return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 187                                 ST_NCI_HCI_DM_LOAD, data, data_len, NULL);
 188         }
 189         return -EPROTO;
 190 }
 191
 192 static int st_nci_hci_dm_reset(struct nfc_dev *dev, void *data,
 193                                size_t data_len)
 194 {
 195         struct nci_dev *ndev = nfc_get_drvdata(dev);
 196
 197         nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 198                         ST_NCI_HCI_DM_RESET, data, data_len, NULL);
 199         msleep(200);
 200
 201         return 0;
 202 }
 203
 204 static int st_nci_hci_get_param(struct nfc_dev *dev, void *data,
 205                                 size_t data_len)
 206 {
 207         int r;
 208         struct sk_buff *msg, *skb;
 209         struct nci_dev *ndev = nfc_get_drvdata(dev);
 210         struct get_param_data *param = (struct get_param_data *)data;
 211
 212         if (data_len < sizeof(struct get_param_data))
 213                 return -EPROTO;
 214
 215         r = nci_hci_get_param(ndev, param->gate, param->data, &skb);
 216         if (r)
 217                 return r;
 218
 219         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 220                                              HCI_GET_PARAM, skb->len);
 221         if (!msg) {
 222                 r = -ENOMEM;
 223                 goto free_skb;
 224         }
 225
 226         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
 227                 kfree_skb(msg);
 228                 r = -ENOBUFS;
 229                 goto free_skb;
 230         }
 231
 232         r = nfc_vendor_cmd_reply(msg);
 233
 234 free_skb:
 235         kfree_skb(skb);
 236         return r;
 237 }
 238
 239 static int st_nci_hci_dm_field_generator(struct nfc_dev *dev, void *data,
 240                                          size_t data_len)
 241 {
 242         struct nci_dev *ndev = nfc_get_drvdata(dev);
 243
 244         return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 245                                 ST_NCI_HCI_DM_FIELD_GENERATOR, data, data_len, NULL);
 246 }
 247
 248 static int st_nci_hci_dm_vdc_measurement_value(struct nfc_dev *dev, void *data,
 249                                                size_t data_len)
 250 {
 251         int r;
 252         struct sk_buff *msg, *skb;
 253         struct nci_dev *ndev = nfc_get_drvdata(dev);
 254
 255         if (data_len != 4)
 256                 return -EPROTO;
 257
 258         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 259                              ST_NCI_HCI_DM_VDC_MEASUREMENT_VALUE,
 260                              data, data_len, &skb);
 261         if (r)
 262                 return r;
 263
 264         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 265                                 HCI_DM_VDC_MEASUREMENT_VALUE, skb->len);
 266         if (!msg) {
 267                 r = -ENOMEM;
 268                 goto free_skb;
 269         }
 270
 271         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
 272                 kfree_skb(msg);
 273                 r = -ENOBUFS;
 274                 goto free_skb;
 275         }
 276
 277         r = nfc_vendor_cmd_reply(msg);
 278
 279 free_skb:
 280         kfree_skb(skb);
 281         return r;
 282 }
 283
 284 static int st_nci_hci_dm_vdc_value_comparison(struct nfc_dev *dev, void *data,
 285                                               size_t data_len)
 286 {
 287         int r;
 288         struct sk_buff *msg, *skb;
 289         struct nci_dev *ndev = nfc_get_drvdata(dev);
 290
 291         if (data_len != 2)
 292                 return -EPROTO;
 293
 294         r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
 295                              ST_NCI_HCI_DM_VDC_VALUE_COMPARISON,
 296                              data, data_len, &skb);
 297         if (r)
 298                 return r;
 299
 300         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 301                                         HCI_DM_VDC_VALUE_COMPARISON, skb->len);
 302         if (!msg) {
 303                 r = -ENOMEM;
 304                 goto free_skb;
 305         }
 306
 307         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
 308                 kfree_skb(msg);
 309                 r = -ENOBUFS;
 310                 goto free_skb;
 311         }
 312
 313         r = nfc_vendor_cmd_reply(msg);
 314
 315 free_skb:
 316         kfree_skb(skb);
 317         return r;
 318 }
 319
 320 static int st_nci_loopback(struct nfc_dev *dev, void *data,
 321                            size_t data_len)
 322 {
 323         int r;
 324         struct sk_buff *msg, *skb;
 325         struct nci_dev *ndev = nfc_get_drvdata(dev);
 326
 327         if (data_len <= 0)
 328                 return -EPROTO;
 329
 330         r = nci_nfcc_loopback(ndev, data, data_len, &skb);
 331         if (r < 0)
 332                 return r;
 333
 334         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 335                                              LOOPBACK, skb->len);
 336         if (!msg) {
 337                 r = -ENOMEM;
 338                 goto free_skb;
 339         }
 340
 341         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
 342                 kfree_skb(msg);
 343                 r = -ENOBUFS;
 344                 goto free_skb;
 345         }
 346
 347         r = nfc_vendor_cmd_reply(msg);
 348 free_skb:
 349         kfree_skb(skb);
 350         return r;
 351 }
 352
 353 static int st_nci_manufacturer_specific(struct nfc_dev *dev, void *data,
 354                                         size_t data_len)
 355 {
 356         struct sk_buff *msg;
 357         struct nci_dev *ndev = nfc_get_drvdata(dev);
 358
 359         msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
 360                                         MANUFACTURER_SPECIFIC,
 361                                         sizeof(ndev->manufact_specific_info));
 362         if (!msg)
 363                 return -ENOMEM;
 364
 365         if (nla_put(msg, NFC_ATTR_VENDOR_DATA, sizeof(ndev->manufact_specific_info),
 366                     &ndev->manufact_specific_info)) {
 367                 kfree_skb(msg);
 368                 return -ENOBUFS;
 369         }
 370
 371         return nfc_vendor_cmd_reply(msg);
 372 }
 373
 374 static const struct nfc_vendor_cmd st_nci_vendor_cmds[] = {
 375         {
 376                 .vendor_id = ST_NCI_VENDOR_OUI,
 377                 .subcmd = FACTORY_MODE,
 378                 .doit = st_nci_factory_mode,
 379         },
 380         {
 381                 .vendor_id = ST_NCI_VENDOR_OUI,
 382                 .subcmd = HCI_CLEAR_ALL_PIPES,
 383                 .doit = st_nci_hci_clear_all_pipes,
 384         },
 385         {
 386                 .vendor_id = ST_NCI_VENDOR_OUI,
 387                 .subcmd = HCI_DM_PUT_DATA,
 388                 .doit = st_nci_hci_dm_put_data,
 389         },
 390         {
 391                 .vendor_id = ST_NCI_VENDOR_OUI,
 392                 .subcmd = HCI_DM_UPDATE_AID,
 393                 .doit = st_nci_hci_dm_update_aid,
 394         },
 395         {
 396                 .vendor_id = ST_NCI_VENDOR_OUI,
 397                 .subcmd = HCI_DM_GET_INFO,
 398                 .doit = st_nci_hci_dm_get_info,
 399         },
 400         {
 401                 .vendor_id = ST_NCI_VENDOR_OUI,
 402                 .subcmd = HCI_DM_GET_DATA,
 403                 .doit = st_nci_hci_dm_get_data,
 404         },
 405         {
 406                 .vendor_id = ST_NCI_VENDOR_OUI,
 407                 .subcmd = HCI_DM_DIRECT_LOAD,
 408                 .doit = st_nci_hci_dm_direct_load,
 409         },
 410         {
 411                 .vendor_id = ST_NCI_VENDOR_OUI,
 412                 .subcmd = HCI_DM_RESET,
 413                 .doit = st_nci_hci_dm_reset,
 414         },
 415         {
 416                 .vendor_id = ST_NCI_VENDOR_OUI,
 417                 .subcmd = HCI_GET_PARAM,
 418                 .doit = st_nci_hci_get_param,
 419         },
 420         {
 421                 .vendor_id = ST_NCI_VENDOR_OUI,
 422                 .subcmd = HCI_DM_FIELD_GENERATOR,
 423                 .doit = st_nci_hci_dm_field_generator,
 424         },
 425         {
 426                 .vendor_id = ST_NCI_VENDOR_OUI,
 427                 .subcmd = HCI_DM_FWUPD_START,
 428                 .doit = st_nci_hci_dm_fwupd_start,
 429         },
 430         {
 431                 .vendor_id = ST_NCI_VENDOR_OUI,
 432                 .subcmd = HCI_DM_FWUPD_END,
 433                 .doit = st_nci_hci_dm_fwupd_end,
 434         },
 435         {
 436                 .vendor_id = ST_NCI_VENDOR_OUI,
 437                 .subcmd = LOOPBACK,
 438                 .doit = st_nci_loopback,
 439         },
 440         {
 441                 .vendor_id = ST_NCI_VENDOR_OUI,
 442                 .subcmd = HCI_DM_VDC_MEASUREMENT_VALUE,
 443                 .doit = st_nci_hci_dm_vdc_measurement_value,
 444         },
 445         {
 446                 .vendor_id = ST_NCI_VENDOR_OUI,
 447                 .subcmd = HCI_DM_VDC_VALUE_COMPARISON,
 448                 .doit = st_nci_hci_dm_vdc_value_comparison,
 449         },
 450         {
 451                 .vendor_id = ST_NCI_VENDOR_OUI,
 452                 .subcmd = MANUFACTURER_SPECIFIC,
 453                 .doit = st_nci_manufacturer_specific,
 454         },
 455 };
 456
 457 int st_nci_vendor_cmds_init(struct nci_dev *ndev)
 458 {
 459         return nfc_set_vendor_cmds(ndev->nfc_dev, st_nci_vendor_cmds,
 460                                    sizeof(st_nci_vendor_cmds));
 461 }
 462 EXPORT_SYMBOL(st_nci_vendor_cmds_init);