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