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The st21nfcb chipset has 3 SWP (Single Wire Protocol) lines and supports up to 3 secure elements (UICC/eSE and µSD in the future). Some st21nfcb firmware does not support the nci command nci_nfcee_mode_set(NCI_NFCEE_DISABLE). For this reason, we assume 2 secures elements are always present (UICC and eSE). They will be added to the SE list once successfully activated and they will be available only after running through enable_se handler or when the poll in listen mode is started. During initialization, the white_list will be always set assuming both UICC & eSE are present. On eSE activation, the ATR bytes are fetched to build the command exchange timeout. The se_io hook will allow to transfer data over SWP. 2 kind of events may appear data is sent over: - ST21NFCB_EVT_TRANSMIT_DATA when receiving an apdu answer - ST21NFCB_EVT_WTX_REQUEST when the secure element needs more time than expected to process a command. If this timeout expires, we send a software reset, and then a hardware one if it still fails. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/*
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* NCI based Driver for STMicroelectronics NFC Chip
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*
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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_ST21NFCB_SE_H_
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#define __LOCAL_ST21NFCB_SE_H_
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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 ST21NFCB_ESE_MAX_LENGTH 33
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#define ST21NFCB_HCI_HOST_ID_ESE 0xc0
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struct st21nfcb_se_info {
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u8 atr[ST21NFCB_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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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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int st21nfcb_se_init(struct nci_dev *ndev);
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void st21nfcb_se_deinit(struct nci_dev *ndev);
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int st21nfcb_nci_discover_se(struct nci_dev *ndev);
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int st21nfcb_nci_enable_se(struct nci_dev *ndev, u32 se_idx);
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int st21nfcb_nci_disable_se(struct nci_dev *ndev, u32 se_idx);
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int st21nfcb_nci_se_io(struct nci_dev *ndev, 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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int st21nfcb_hci_load_session(struct nci_dev *ndev);
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void st21nfcb_hci_event_received(struct nci_dev *ndev, u8 pipe,
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u8 event, struct sk_buff *skb);
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void st21nfcb_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
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struct sk_buff *skb);
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#endif /* __LOCAL_ST21NFCB_NCI_H_ */
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