2130fb97fe
st21nfca has 1 physical SWP line and can support up to 2 secure elements (UICC & eSE) thanks to an external switch managed with a gpio. The platform integrator needs to specify thanks to 2 initialization properties, uicc-present and ese-present, if it is suppose to have uicc and/or ese. Of course if the platform does not have an external switch, only one kind of secure element can be supported. Those parameters are under platform integrator responsibilities. During initialization, the white_list will be set according to those parameters. The discovery_se function will assume a secure element is physically present according to uicc-present and ese-present values and will add it to the secure element list. On ese activation, the atr is retrieved to calculate a command exchange timeout based on the first atr(TB) value. The se_io will allow to transfer data over SWP. 2 kind of events may appear after a data is sent over: - ST21NFCA_EVT_TRANSMIT_DATA when receiving an apdu answer - ST21NFCA_EVT_WTX_REQUEST when the secure element needs more time than expected to compute a command. If this timeout expired, a first recovery tentative consist to send a simple software reset proprietary command. If this tentative still fail, a second recovery tentative consist to send a hardware reset proprietary command. This function is only relevant for eSE like secure element. This patch also change the way a pipe is referenced. There can be different pipe connected to the same gate with different host destination (ex: CONNECTIVITY). In order to keep host information every pipe are reference with a tuple (gate, host). In order to reduce changes, we are keeping unchanged the way a gate is addressed on the Terminal Host. However, this is working because we consider the apdu reader gate is only present on the eSE slot also the connectivity gate cannot give a reliable value; it will give the latest stored pipe value. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
64 lines
1.9 KiB
C
64 lines
1.9 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 __ST21NFCA_SE_H
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#define __ST21NFCA_SE_H
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#include <linux/skbuff.h>
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#include <linux/workqueue.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 ST21NFCA_ESE_MAX_LENGTH 33
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#define ST21NFCA_ESE_HOST_ID 0xc0
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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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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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#endif /* __ST21NFCA_SE_H */
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