drivers/nfc/st21nfca/st21nfca.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
   4  */
   5
   6 #ifndef __LOCAL_ST21NFCA_H_
   7 #define __LOCAL_ST21NFCA_H_
   8
   9 #include <net/nfc/hci.h>
  10 #include <linux/skbuff.h>
  11 #include <linux/workqueue.h>
  12
  13 #define HCI_MODE 0
  14
  15 /* framing in HCI mode */
  16 #define ST21NFCA_SOF_EOF_LEN    2
  17
  18 /* Almost every time value is 0 */
  19 #define ST21NFCA_HCI_LLC_LEN    1
  20
  21 /* Size in worst case :
  22  * In normal case CRC len = 2 but byte stuffing
  23  * may appear in case one CRC byte = ST21NFCA_SOF_EOF
  24  */
  25 #define ST21NFCA_HCI_LLC_CRC    4
  26
  27 #define ST21NFCA_HCI_LLC_LEN_CRC        (ST21NFCA_SOF_EOF_LEN + \
  28                                                 ST21NFCA_HCI_LLC_LEN + \
  29                                                 ST21NFCA_HCI_LLC_CRC)
  30 #define ST21NFCA_HCI_LLC_MIN_SIZE       (1 + ST21NFCA_HCI_LLC_LEN_CRC)
  31
  32 /* Worst case when adding byte stuffing between each byte */
  33 #define ST21NFCA_HCI_LLC_MAX_PAYLOAD    29
  34 #define ST21NFCA_HCI_LLC_MAX_SIZE       (ST21NFCA_HCI_LLC_LEN_CRC + 1 + \
  35                                         ST21NFCA_HCI_LLC_MAX_PAYLOAD)
  36
  37 /* Reader RF commands */
  38 #define ST21NFCA_WR_XCHG_DATA           0x10
  39
  40 #define ST21NFCA_DEVICE_MGNT_GATE       0x01
  41 #define ST21NFCA_RF_READER_F_GATE       0x14
  42 #define ST21NFCA_RF_CARD_F_GATE         0x24
  43 #define ST21NFCA_APDU_READER_GATE       0xf0
  44 #define ST21NFCA_CONNECTIVITY_GATE      0x41
  45
  46 /*
  47  * ref ISO7816-3 chap 8.1. the initial character TS is followed by a
  48  * sequence of at most 32 characters.
  49  */
  50 #define ST21NFCA_ESE_MAX_LENGTH         33
  51 #define ST21NFCA_ESE_HOST_ID            0xc0
  52
  53 #define DRIVER_DESC "HCI NFC driver for ST21NFCA"
  54
  55 #define ST21NFCA_HCI_MODE               0
  56 #define ST21NFCA_NUM_DEVICES            256
  57
  58 #define ST21NFCA_VENDOR_OUI             0x0080E1 /* STMicroelectronics */
  59 #define ST21NFCA_FACTORY_MODE           2
  60
  61 struct st21nfca_se_status {
  62         bool is_ese_present;
  63         bool is_uicc_present;
  64 };
  65
  66 enum st21nfca_state {
  67         ST21NFCA_ST_COLD,
  68         ST21NFCA_ST_READY,
  69 };
  70
  71 /**
  72  * enum nfc_vendor_cmds - supported nfc vendor commands
  73  *
  74  * @FACTORY_MODE: Allow to set the driver into a mode where no secure element
  75  *      are activated. It does not consider any NFC_ATTR_VENDOR_DATA.
  76  * @HCI_CLEAR_ALL_PIPES: Allow to execute a HCI clear all pipes command.
  77  *      It does not consider any NFC_ATTR_VENDOR_DATA.
  78  * @HCI_DM_PUT_DATA: Allow to configure specific CLF registry as for example
  79  *      RF trimmings or low level drivers configurations (I2C, SPI, SWP).
  80  * @HCI_DM_UPDATE_AID: Allow to configure an AID routing into the CLF routing
  81  *      table following RF technology, CLF mode or protocol.
  82  * @HCI_DM_GET_INFO: Allow to retrieve CLF information.
  83  * @HCI_DM_GET_DATA: Allow to retrieve CLF configurable data such as low
  84  *      level drivers configurations or RF trimmings.
  85  * @HCI_DM_LOAD: Allow to load a firmware into the CLF. A complete
  86  *      packet can be more than 8KB.
  87  * @HCI_DM_RESET: Allow to run a CLF reset in order to "commit" CLF
  88  *      configuration changes without CLF power off.
  89  * @HCI_GET_PARAM: Allow to retrieve an HCI CLF parameter (for example the
  90  *      white list).
  91  * @HCI_DM_FIELD_GENERATOR: Allow to generate different kind of RF
  92  *      technology. When using this command to anti-collision is done.
  93  * @HCI_LOOPBACK: Allow to echo a command and test the Dh to CLF
  94  *      connectivity.
  95  */
  96 enum nfc_vendor_cmds {
  97         FACTORY_MODE,
  98         HCI_CLEAR_ALL_PIPES,
  99         HCI_DM_PUT_DATA,
 100         HCI_DM_UPDATE_AID,
 101         HCI_DM_GET_INFO,
 102         HCI_DM_GET_DATA,
 103         HCI_DM_LOAD,
 104         HCI_DM_RESET,
 105         HCI_GET_PARAM,
 106         HCI_DM_FIELD_GENERATOR,
 107         HCI_LOOPBACK,
 108 };
 109
 110 struct st21nfca_vendor_info {
 111         struct completion req_completion;
 112         struct sk_buff *rx_skb;
 113 };
 114
 115 struct st21nfca_dep_info {
 116         struct sk_buff *tx_pending;
 117         struct work_struct tx_work;
 118         u8 curr_nfc_dep_pni;
 119         u32 idx;
 120         u8 to;
 121         u8 did;
 122         u8 bsi;
 123         u8 bri;
 124         u8 lri;
 125 } __packed;
 126
 127 struct st21nfca_se_info {
 128         u8 atr[ST21NFCA_ESE_MAX_LENGTH];
 129         struct completion req_completion;
 130
 131         struct timer_list bwi_timer;
 132         int wt_timeout; /* in msecs */
 133         bool bwi_active;
 134
 135         struct timer_list se_active_timer;
 136         bool se_active;
 137         int expected_pipes;
 138         int count_pipes;
 139
 140         bool xch_error;
 141
 142         se_io_cb_t cb;
 143         void *cb_context;
 144 };
 145
 146 struct st21nfca_hci_info {
 147         struct nfc_phy_ops *phy_ops;
 148         void *phy_id;
 149
 150         struct nfc_hci_dev *hdev;
 151         struct st21nfca_se_status *se_status;
 152
 153         enum st21nfca_state state;
 154
 155         struct mutex info_lock;
 156
 157         int async_cb_type;
 158         data_exchange_cb_t async_cb;
 159         void *async_cb_context;
 160
 161         struct st21nfca_dep_info dep_info;
 162         struct st21nfca_se_info se_info;
 163         struct st21nfca_vendor_info vendor_info;
 164 };
 165
 166 int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
 167                        char *llc_name, int phy_headroom, int phy_tailroom,
 168                        int phy_payload, struct nfc_hci_dev **hdev,
 169                        struct st21nfca_se_status *se_status);
 170 void st21nfca_hci_remove(struct nfc_hci_dev *hdev);
 171
 172 int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
 173                                 u8 event, struct sk_buff *skb);
 174 int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb);
 175
 176 int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len);
 177 int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb);
 178 void st21nfca_dep_init(struct nfc_hci_dev *hdev);
 179 void st21nfca_dep_deinit(struct nfc_hci_dev *hdev);
 180
 181 int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host,
 182                                         u8 event, struct sk_buff *skb);
 183 int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev,
 184                                         u8 event, struct sk_buff *skb);
 185
 186 int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev);
 187 int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx);
 188 int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx);
 189 int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx,
 190                 u8 *apdu, size_t apdu_length,
 191                 se_io_cb_t cb, void *cb_context);
 192
 193 void st21nfca_se_init(struct nfc_hci_dev *hdev);
 194 void st21nfca_se_deinit(struct nfc_hci_dev *hdev);
 195
 196 int st21nfca_hci_loopback_event_received(struct nfc_hci_dev *ndev, u8 event,
 197                                          struct sk_buff *skb);
 198 int st21nfca_vendor_cmds_init(struct nfc_hci_dev *ndev);
 199
 200 #endif /* __LOCAL_ST21NFCA_H_ */