drivers/nfc/st21nfca/st21nfca.h

   1 /*
   2  * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #ifndef __LOCAL_ST21NFCA_H_
  18 #define __LOCAL_ST21NFCA_H_
  19
  20 #include <net/nfc/hci.h>
  21
  22 #include "st21nfca_dep.h"
  23
  24 #define HCI_MODE 0
  25
  26 /* framing in HCI mode */
  27 #define ST21NFCA_SOF_EOF_LEN    2
  28
  29 /* Almost every time value is 0 */
  30 #define ST21NFCA_HCI_LLC_LEN    1
  31
  32 /* Size in worst case :
  33  * In normal case CRC len = 2 but byte stuffing
  34  * may appear in case one CRC byte = ST21NFCA_SOF_EOF
  35  */
  36 #define ST21NFCA_HCI_LLC_CRC    4
  37
  38 #define ST21NFCA_HCI_LLC_LEN_CRC        (ST21NFCA_SOF_EOF_LEN + \
  39                                                 ST21NFCA_HCI_LLC_LEN + \
  40                                                 ST21NFCA_HCI_LLC_CRC)
  41 #define ST21NFCA_HCI_LLC_MIN_SIZE       (1 + ST21NFCA_HCI_LLC_LEN_CRC)
  42
  43 /* Worst case when adding byte stuffing between each byte */
  44 #define ST21NFCA_HCI_LLC_MAX_PAYLOAD    29
  45 #define ST21NFCA_HCI_LLC_MAX_SIZE       (ST21NFCA_HCI_LLC_LEN_CRC + 1 + \
  46                                         ST21NFCA_HCI_LLC_MAX_PAYLOAD)
  47
  48 #define DRIVER_DESC "HCI NFC driver for ST21NFCA"
  49
  50 #define ST21NFCA_HCI_MODE 0
  51
  52 #define ST21NFCA_NUM_DEVICES 256
  53
  54 int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
  55                        char *llc_name, int phy_headroom, int phy_tailroom,
  56                        int phy_payload, struct nfc_hci_dev **hdev);
  57 void st21nfca_hci_remove(struct nfc_hci_dev *hdev);
  58
  59 enum st21nfca_state {
  60         ST21NFCA_ST_COLD,
  61         ST21NFCA_ST_READY,
  62 };
  63
  64 struct st21nfca_hci_info {
  65         struct nfc_phy_ops *phy_ops;
  66         void *phy_id;
  67
  68         struct nfc_hci_dev *hdev;
  69
  70         enum st21nfca_state state;
  71
  72         struct mutex info_lock;
  73
  74         int async_cb_type;
  75         data_exchange_cb_t async_cb;
  76         void *async_cb_context;
  77
  78         struct st21nfca_dep_info dep_info;
  79 };
  80
  81 /* Reader RF commands */
  82 #define ST21NFCA_WR_XCHG_DATA            0x10
  83
  84 #define ST21NFCA_RF_READER_F_GATE               0x14
  85
  86 #define ST21NFCA_RF_CARD_F_GATE 0x24
  87
  88 #endif /* __LOCAL_ST21NFCA_H_ */