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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
*/
#ifndef __LOCAL_ST21NFCA_H_
#define __LOCAL_ST21NFCA_H_
#include <net/nfc/hci.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#define HCI_MODE 0
/* framing in HCI mode */
#define ST21NFCA_SOF_EOF_LEN 2
/* Almost every time value is 0 */
#define ST21NFCA_HCI_LLC_LEN 1
/* Size in worst case :
* In normal case CRC len = 2 but byte stuffing
* may appear in case one CRC byte = ST21NFCA_SOF_EOF
*/
#define ST21NFCA_HCI_LLC_CRC 4
#define ST21NFCA_HCI_LLC_LEN_CRC (ST21NFCA_SOF_EOF_LEN + \
ST21NFCA_HCI_LLC_LEN + \
ST21NFCA_HCI_LLC_CRC)
#define ST21NFCA_HCI_LLC_MIN_SIZE (1 + ST21NFCA_HCI_LLC_LEN_CRC)
/* Worst case when adding byte stuffing between each byte */
#define ST21NFCA_HCI_LLC_MAX_PAYLOAD 29
#define ST21NFCA_HCI_LLC_MAX_SIZE (ST21NFCA_HCI_LLC_LEN_CRC + 1 + \
ST21NFCA_HCI_LLC_MAX_PAYLOAD)
/* Reader RF commands */
#define ST21NFCA_WR_XCHG_DATA 0x10
#define ST21NFCA_DEVICE_MGNT_GATE 0x01
#define ST21NFCA_RF_READER_F_GATE 0x14
#define ST21NFCA_RF_CARD_F_GATE 0x24
#define ST21NFCA_APDU_READER_GATE 0xf0
#define ST21NFCA_CONNECTIVITY_GATE 0x41
/*
* ref ISO7816-3 chap 8.1. the initial character TS is followed by a
* sequence of at most 32 characters.
*/
#define ST21NFCA_ESE_MAX_LENGTH 33
#define ST21NFCA_ESE_HOST_ID 0xc0
#define DRIVER_DESC "HCI NFC driver for ST21NFCA"
#define ST21NFCA_HCI_MODE 0
#define ST21NFCA_NUM_DEVICES 256
#define ST21NFCA_VENDOR_OUI 0x0080E1 /* STMicroelectronics */
#define ST21NFCA_FACTORY_MODE 2
struct st21nfca_se_status {
bool is_ese_present;
bool is_uicc_present;
};
enum st21nfca_state {
ST21NFCA_ST_COLD,
ST21NFCA_ST_READY,
};
/**
* enum nfc_vendor_cmds - supported nfc vendor commands
*
* @FACTORY_MODE: Allow to set the driver into a mode where no secure element
* are activated. It does not consider any NFC_ATTR_VENDOR_DATA.
* @HCI_CLEAR_ALL_PIPES: Allow to execute a HCI clear all pipes command.
* It does not consider any NFC_ATTR_VENDOR_DATA.
* @HCI_DM_PUT_DATA: Allow to configure specific CLF registry as for example
* RF trimmings or low level drivers configurations (I2C, SPI, SWP).
* @HCI_DM_UPDATE_AID: Allow to configure an AID routing into the CLF routing
* table following RF technology, CLF mode or protocol.
* @HCI_DM_GET_INFO: Allow to retrieve CLF information.
* @HCI_DM_GET_DATA: Allow to retrieve CLF configurable data such as low
* level drivers configurations or RF trimmings.
* @HCI_DM_LOAD: Allow to load a firmware into the CLF. A complete
* packet can be more than 8KB.
* @HCI_DM_RESET: Allow to run a CLF reset in order to "commit" CLF
* configuration changes without CLF power off.
* @HCI_GET_PARAM: Allow to retrieve an HCI CLF parameter (for example the
* white list).
* @HCI_DM_FIELD_GENERATOR: Allow to generate different kind of RF
* technology. When using this command to anti-collision is done.
* @HCI_LOOPBACK: Allow to echo a command and test the Dh to CLF
* connectivity.
*/
enum nfc_vendor_cmds {
FACTORY_MODE,
HCI_CLEAR_ALL_PIPES,
HCI_DM_PUT_DATA,
HCI_DM_UPDATE_AID,
HCI_DM_GET_INFO,
HCI_DM_GET_DATA,
HCI_DM_LOAD,
HCI_DM_RESET,
HCI_GET_PARAM,
HCI_DM_FIELD_GENERATOR,
HCI_LOOPBACK,
};
struct st21nfca_vendor_info {
struct completion req_completion;
struct sk_buff *rx_skb;
};
struct st21nfca_dep_info {
struct sk_buff *tx_pending;
struct work_struct tx_work;
u8 curr_nfc_dep_pni;
u32 idx;
u8 to;
u8 did;
u8 bsi;
u8 bri;
u8 lri;
} __packed;
struct st21nfca_se_info {
u8 atr[ST21NFCA_ESE_MAX_LENGTH];
struct completion req_completion;
struct timer_list bwi_timer;
int wt_timeout; /* in msecs */
bool bwi_active;
struct timer_list se_active_timer;
bool se_active;
int expected_pipes;
int count_pipes;
bool xch_error;
se_io_cb_t cb;
void *cb_context;
struct work_struct timeout_work;
};
struct st21nfca_hci_info {
struct nfc_phy_ops *phy_ops;
void *phy_id;
struct nfc_hci_dev *hdev;
struct st21nfca_se_status *se_status;
enum st21nfca_state state;
struct mutex info_lock;
int async_cb_type;
data_exchange_cb_t async_cb;
void *async_cb_context;
struct st21nfca_dep_info dep_info;
struct st21nfca_se_info se_info;
struct st21nfca_vendor_info vendor_info;
};
int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
char *llc_name, int phy_headroom, int phy_tailroom,
int phy_payload, struct nfc_hci_dev **hdev,
struct st21nfca_se_status *se_status);
void st21nfca_hci_remove(struct nfc_hci_dev *hdev);
int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
u8 event, struct sk_buff *skb);
int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb);
int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len);
int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb);
void st21nfca_dep_init(struct nfc_hci_dev *hdev);
void st21nfca_dep_deinit(struct nfc_hci_dev *hdev);
int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host,
u8 event, struct sk_buff *skb);
int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev,
u8 event, struct sk_buff *skb);
int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev);
int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx);
int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx);
int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx,
u8 *apdu, size_t apdu_length,
se_io_cb_t cb, void *cb_context);
void st21nfca_se_init(struct nfc_hci_dev *hdev);
void st21nfca_se_deinit(struct nfc_hci_dev *hdev);
int st21nfca_hci_loopback_event_received(struct nfc_hci_dev *ndev, u8 event,
struct sk_buff *skb);
int st21nfca_vendor_cmds_init(struct nfc_hci_dev *ndev);
#endif /* __LOCAL_ST21NFCA_H_ */
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