drivers/nfc/st-nci/st-nci.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * NCI based Driver for STMicroelectronics NFC Chip
   4  *
   5  * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
   6  */
   7
   8 #ifndef __LOCAL_ST_NCI_H_
   9 #define __LOCAL_ST_NCI_H_
  10
  11 #include "ndlc.h"
  12
  13 /* Define private flags: */
  14 #define ST_NCI_RUNNING                  1
  15
  16 #define ST_NCI_CORE_PROP                0x01
  17 #define ST_NCI_SET_NFC_MODE             0x02
  18
  19 /*
  20  * ref ISO7816-3 chap 8.1. the initial character TS is followed by a
  21  * sequence of at most 32 characters.
  22  */
  23 #define ST_NCI_ESE_MAX_LENGTH  33
  24
  25 #define ST_NCI_DEVICE_MGNT_GATE         0x01
  26
  27 #define ST_NCI_VENDOR_OUI 0x0080E1 /* STMicroelectronics */
  28 #define ST_NCI_FACTORY_MODE 2
  29
  30 struct nci_mode_set_cmd {
  31         u8 cmd_type;
  32         u8 mode;
  33 } __packed;
  34
  35 struct nci_mode_set_rsp {
  36         u8 status;
  37 } __packed;
  38
  39 struct st_nci_se_status {
  40         bool is_ese_present;
  41         bool is_uicc_present;
  42 };
  43
  44 struct st_nci_se_info {
  45         struct st_nci_se_status *se_status;
  46         u8 atr[ST_NCI_ESE_MAX_LENGTH];
  47         struct completion req_completion;
  48
  49         struct timer_list bwi_timer;
  50         int wt_timeout; /* in msecs */
  51         bool bwi_active;
  52
  53         struct timer_list se_active_timer;
  54         bool se_active;
  55
  56         bool xch_error;
  57
  58         se_io_cb_t cb;
  59         void *cb_context;
  60 };
  61
  62 /**
  63  * enum nfc_vendor_cmds - supported nfc vendor commands
  64  *
  65  * @FACTORY_MODE: Allow to set the driver into a mode where no secure element
  66  *      are activated. It does not consider any NFC_ATTR_VENDOR_DATA.
  67  * @HCI_CLEAR_ALL_PIPES: Allow to execute a HCI clear all pipes command.
  68  *      It does not consider any NFC_ATTR_VENDOR_DATA.
  69  * @HCI_DM_PUT_DATA: Allow to configure specific CLF registry as for example
  70  *      RF trimmings or low level drivers configurations (I2C, SPI, SWP).
  71  * @HCI_DM_UPDATE_AID: Allow to configure an AID routing into the CLF routing
  72  *      table following RF technology, CLF mode or protocol.
  73  * @HCI_DM_GET_INFO: Allow to retrieve CLF information.
  74  * @HCI_DM_GET_DATA: Allow to retrieve CLF configurable data such as low
  75  *      level drivers configurations or RF trimmings.
  76  * @HCI_DM_DIRECT_LOAD: Allow to load a firmware into the CLF. A complete
  77  *      packet can be more than 8KB.
  78  * @HCI_DM_RESET: Allow to run a CLF reset in order to "commit" CLF
  79  *      configuration changes without CLF power off.
  80  * @HCI_GET_PARAM: Allow to retrieve an HCI CLF parameter (for example the
  81  *      white list).
  82  * @HCI_DM_FIELD_GENERATOR: Allow to generate different kind of RF
  83  *      technology. When using this command to anti-collision is done.
  84  * @LOOPBACK: Allow to echo a command and test the Dh to CLF connectivity.
  85  * @HCI_DM_VDC_MEASUREMENT_VALUE: Allow to measure the field applied on the
  86  *      CLF antenna. A value between 0 and 0x0f is returned. 0 is maximum.
  87  * @HCI_DM_FWUPD_START: Allow to put CLF into firmware update mode. It is a
  88  *      specific CLF command as there is no GPIO for this.
  89  * @HCI_DM_FWUPD_END:  Allow to complete firmware update.
  90  * @HCI_DM_VDC_VALUE_COMPARISON: Allow to compare the field applied on the
  91  *      CLF antenna to a reference value.
  92  * @MANUFACTURER_SPECIFIC: Allow to retrieve manufacturer specific data
  93  *      received during a NCI_CORE_INIT_CMD.
  94  */
  95 enum nfc_vendor_cmds {
  96         FACTORY_MODE,
  97         HCI_CLEAR_ALL_PIPES,
  98         HCI_DM_PUT_DATA,
  99         HCI_DM_UPDATE_AID,
 100         HCI_DM_GET_INFO,
 101         HCI_DM_GET_DATA,
 102         HCI_DM_DIRECT_LOAD,
 103         HCI_DM_RESET,
 104         HCI_GET_PARAM,
 105         HCI_DM_FIELD_GENERATOR,
 106         LOOPBACK,
 107         HCI_DM_FWUPD_START,
 108         HCI_DM_FWUPD_END,
 109         HCI_DM_VDC_MEASUREMENT_VALUE,
 110         HCI_DM_VDC_VALUE_COMPARISON,
 111         MANUFACTURER_SPECIFIC,
 112 };
 113
 114 struct st_nci_info {
 115         struct llt_ndlc *ndlc;
 116         unsigned long flags;
 117
 118         struct st_nci_se_info se_info;
 119 };
 120
 121 void st_nci_remove(struct nci_dev *ndev);
 122 int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
 123                  int phy_tailroom, struct st_nci_se_status *se_status);
 124
 125 int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status);
 126 void st_nci_se_deinit(struct nci_dev *ndev);
 127
 128 int st_nci_discover_se(struct nci_dev *ndev);
 129 int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx);
 130 int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx);
 131 int st_nci_se_io(struct nci_dev *ndev, u32 se_idx,
 132                                 u8 *apdu, size_t apdu_length,
 133                                 se_io_cb_t cb, void *cb_context);
 134 int st_nci_hci_load_session(struct nci_dev *ndev);
 135 void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
 136                                         u8 event, struct sk_buff *skb);
 137 void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
 138                                                 struct sk_buff *skb);
 139
 140 int st_nci_vendor_cmds_init(struct nci_dev *ndev);
 141
 142 #endif /* __LOCAL_ST_NCI_H_ */