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NFC: st21nfcb: Add support for secure element
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>
This commit is contained in:
Christophe Ricard
Samuel Ortiz
parent
11f54f2286
commit
8ae01f7967
@ -2,7 +2,7 @@
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# Makefile for ST21NFCB NCI based NFC driver
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#
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st21nfcb_nci-objs = ndlc.o st21nfcb.o
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st21nfcb_nci-objs = ndlc.o st21nfcb.o st21nfcb_se.o
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obj-$(CONFIG_NFC_ST21NFCB) += st21nfcb_nci.o
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st21nfcb_i2c-objs = i2c.o
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@ -22,6 +22,7 @@
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#include <net/nfc/nci_core.h>
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#include "st21nfcb.h"
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#include "st21nfcb_se.h"
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#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
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@ -78,6 +79,13 @@ static struct nci_ops st21nfcb_nci_ops = {
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.close = st21nfcb_nci_close,
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.send = st21nfcb_nci_send,
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.get_rfprotocol = st21nfcb_nci_get_rfprotocol,
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.discover_se = st21nfcb_nci_discover_se,
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.enable_se = st21nfcb_nci_enable_se,
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.disable_se = st21nfcb_nci_disable_se,
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.se_io = st21nfcb_nci_se_io,
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.hci_load_session = st21nfcb_hci_load_session,
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.hci_event_received = st21nfcb_hci_event_received,
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.hci_cmd_received = st21nfcb_hci_cmd_received,
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};
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int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
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@ -114,9 +122,10 @@ int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
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if (r) {
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pr_err("Cannot register nfc device to nci core\n");
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nci_free_device(ndlc->ndev);
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return r;
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}
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return r;
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return st21nfcb_se_init(ndlc->ndev);
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}
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EXPORT_SYMBOL_GPL(st21nfcb_nci_probe);
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@ -19,6 +19,7 @@
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#ifndef __LOCAL_ST21NFCB_H_
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#define __LOCAL_ST21NFCB_H_
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#include "st21nfcb_se.h"
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#include "ndlc.h"
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/* Define private flags: */
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@ -27,6 +28,7 @@
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struct st21nfcb_nci_info {
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struct llt_ndlc *ndlc;
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unsigned long flags;
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struct st21nfcb_se_info se_info;
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};
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void st21nfcb_nci_remove(struct nci_dev *ndev);
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672
drivers/nfc/st21nfcb/st21nfcb_se.c
Normal file
672
drivers/nfc/st21nfcb/st21nfcb_se.c
Normal file
@ -0,0 +1,672 @@
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/*
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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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#include <linux/module.h>
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#include <linux/nfc.h>
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#include <linux/delay.h>
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#include <net/nfc/nci.h>
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#include <net/nfc/nci_core.h>
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#include "st21nfcb.h"
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#include "st21nfcb_se.h"
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struct st21nfcb_pipe_info {
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u8 pipe_state;
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u8 src_host_id;
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u8 src_gate_id;
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u8 dst_host_id;
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u8 dst_gate_id;
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} __packed;
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/* Hosts */
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#define ST21NFCB_HOST_CONTROLLER_ID 0x00
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#define ST21NFCB_TERMINAL_HOST_ID 0x01
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#define ST21NFCB_UICC_HOST_ID 0x02
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#define ST21NFCB_ESE_HOST_ID 0xc0
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/* Gates */
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#define ST21NFCB_DEVICE_MGNT_GATE 0x01
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#define ST21NFCB_APDU_READER_GATE 0xf0
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#define ST21NFCB_CONNECTIVITY_GATE 0x41
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/* Pipes */
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#define ST21NFCB_DEVICE_MGNT_PIPE 0x02
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/* Connectivity pipe only */
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#define ST21NFCB_SE_COUNT_PIPE_UICC 0x01
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/* Connectivity + APDU Reader pipe */
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#define ST21NFCB_SE_COUNT_PIPE_EMBEDDED 0x02
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#define ST21NFCB_SE_TO_HOT_PLUG 1000 /* msecs */
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#define ST21NFCB_SE_TO_PIPES 2000
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#define ST21NFCB_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80)
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#define NCI_HCI_APDU_PARAM_ATR 0x01
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#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01
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#define NCI_HCI_ADMIN_PARAM_WHITELIST 0x03
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#define NCI_HCI_ADMIN_PARAM_HOST_LIST 0x04
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#define ST21NFCB_EVT_SE_HARD_RESET 0x20
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#define ST21NFCB_EVT_TRANSMIT_DATA 0x10
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#define ST21NFCB_EVT_WTX_REQUEST 0x11
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#define ST21NFCB_EVT_SE_SOFT_RESET 0x11
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#define ST21NFCB_EVT_SE_END_OF_APDU_TRANSFER 0x21
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#define ST21NFCB_EVT_HOT_PLUG 0x03
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#define ST21NFCB_SE_MODE_OFF 0x00
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#define ST21NFCB_SE_MODE_ON 0x01
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#define ST21NFCB_EVT_CONNECTIVITY 0x10
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#define ST21NFCB_EVT_TRANSACTION 0x12
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#define ST21NFCB_DM_GETINFO 0x13
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#define ST21NFCB_DM_GETINFO_PIPE_LIST 0x02
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#define ST21NFCB_DM_GETINFO_PIPE_INFO 0x01
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#define ST21NFCB_DM_PIPE_CREATED 0x02
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#define ST21NFCB_DM_PIPE_OPEN 0x04
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#define ST21NFCB_DM_RF_ACTIVE 0x80
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#define ST21NFCB_DM_DISCONNECT 0x30
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#define ST21NFCB_DM_IS_PIPE_OPEN(p) \
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((p & 0x0f) == (ST21NFCB_DM_PIPE_CREATED | ST21NFCB_DM_PIPE_OPEN))
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#define ST21NFCB_ATR_DEFAULT_BWI 0x04
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/*
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* WT = 2^BWI/10[s], convert into msecs and add a secure
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* room by increasing by 2 this timeout
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*/
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#define ST21NFCB_BWI_TO_TIMEOUT(x) ((1 << x) * 200)
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#define ST21NFCB_ATR_GET_Y_FROM_TD(x) (x >> 4)
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/* If TA is present bit 0 is set */
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#define ST21NFCB_ATR_TA_PRESENT(x) (x & 0x01)
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/* If TB is present bit 1 is set */
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#define ST21NFCB_ATR_TB_PRESENT(x) (x & 0x02)
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#define ST21NFCB_NUM_DEVICES 256
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static DECLARE_BITMAP(dev_mask, ST21NFCB_NUM_DEVICES);
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/* Here are the mandatory pipe for st21nfcb */
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static struct nci_hci_gate st21nfcb_gates[] = {
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{NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PIPE,
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ST21NFCB_HOST_CONTROLLER_ID},
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{NCI_HCI_LINK_MGMT_GATE, NCI_HCI_LINK_MGMT_PIPE,
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ST21NFCB_HOST_CONTROLLER_ID},
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{ST21NFCB_DEVICE_MGNT_GATE, ST21NFCB_DEVICE_MGNT_PIPE,
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ST21NFCB_HOST_CONTROLLER_ID},
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/* Secure element pipes are created by secure element host */
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{ST21NFCB_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
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ST21NFCB_HOST_CONTROLLER_ID},
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{ST21NFCB_APDU_READER_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
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ST21NFCB_HOST_CONTROLLER_ID},
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};
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static u8 st21nfcb_se_get_bwi(struct nci_dev *ndev)
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{
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int i;
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u8 td;
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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/* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */
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for (i = 1; i < ST21NFCB_ESE_MAX_LENGTH; i++) {
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td = ST21NFCB_ATR_GET_Y_FROM_TD(info->se_info.atr[i]);
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if (ST21NFCB_ATR_TA_PRESENT(td))
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i++;
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if (ST21NFCB_ATR_TB_PRESENT(td)) {
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i++;
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return info->se_info.atr[i] >> 4;
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}
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}
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return ST21NFCB_ATR_DEFAULT_BWI;
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}
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static void st21nfcb_se_get_atr(struct nci_dev *ndev)
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{
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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int r;
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struct sk_buff *skb;
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r = nci_hci_get_param(ndev, ST21NFCB_APDU_READER_GATE,
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NCI_HCI_APDU_PARAM_ATR, &skb);
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if (r < 0)
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return;
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if (skb->len <= ST21NFCB_ESE_MAX_LENGTH) {
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memcpy(info->se_info.atr, skb->data, skb->len);
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info->se_info.wt_timeout =
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ST21NFCB_BWI_TO_TIMEOUT(st21nfcb_se_get_bwi(ndev));
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}
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kfree_skb(skb);
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}
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int st21nfcb_hci_load_session(struct nci_dev *ndev)
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{
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int i, j, r;
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struct sk_buff *skb_pipe_list, *skb_pipe_info;
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struct st21nfcb_pipe_info *dm_pipe_info;
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u8 pipe_list[] = { ST21NFCB_DM_GETINFO_PIPE_LIST,
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ST21NFCB_TERMINAL_HOST_ID};
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u8 pipe_info[] = { ST21NFCB_DM_GETINFO_PIPE_INFO,
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ST21NFCB_TERMINAL_HOST_ID, 0};
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/* On ST21NFCB device pipes number are dynamics
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* If pipes are already created, hci_dev_up will fail.
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* Doing a clear all pipe is a bad idea because:
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* - It does useless EEPROM cycling
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* - It might cause issue for secure elements support
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* (such as removing connectivity or APDU reader pipe)
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* A better approach on ST21NFCB is to:
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* - get a pipe list for each host.
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* (eg: ST21NFCB_HOST_CONTROLLER_ID for now).
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* (TODO Later on UICC HOST and eSE HOST)
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* - get pipe information
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* - match retrieved pipe list in st21nfcb_gates
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* ST21NFCB_DEVICE_MGNT_GATE is a proprietary gate
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* with ST21NFCB_DEVICE_MGNT_PIPE.
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* Pipe can be closed and need to be open.
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*/
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r = nci_hci_connect_gate(ndev, ST21NFCB_HOST_CONTROLLER_ID,
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ST21NFCB_DEVICE_MGNT_GATE,
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ST21NFCB_DEVICE_MGNT_PIPE);
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if (r < 0)
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goto free_info;
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/* Get pipe list */
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r = nci_hci_send_cmd(ndev, ST21NFCB_DEVICE_MGNT_GATE,
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ST21NFCB_DM_GETINFO, pipe_list, sizeof(pipe_list),
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&skb_pipe_list);
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if (r < 0)
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goto free_info;
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/* Complete the existing gate_pipe table */
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for (i = 0; i < skb_pipe_list->len; i++) {
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pipe_info[2] = skb_pipe_list->data[i];
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r = nci_hci_send_cmd(ndev, ST21NFCB_DEVICE_MGNT_GATE,
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ST21NFCB_DM_GETINFO, pipe_info,
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sizeof(pipe_info), &skb_pipe_info);
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if (r)
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continue;
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/*
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* Match pipe ID and gate ID
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* Output format from ST21NFC_DM_GETINFO is:
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* - pipe state (1byte)
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* - source hid (1byte)
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* - source gid (1byte)
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* - destination hid (1byte)
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* - destination gid (1byte)
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*/
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dm_pipe_info = (struct st21nfcb_pipe_info *)skb_pipe_info->data;
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if (dm_pipe_info->dst_gate_id == ST21NFCB_APDU_READER_GATE &&
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dm_pipe_info->src_host_id != ST21NFCB_ESE_HOST_ID) {
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pr_err("Unexpected apdu_reader pipe on host %x\n",
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dm_pipe_info->src_host_id);
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continue;
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}
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for (j = 0; (j < ARRAY_SIZE(st21nfcb_gates)) &&
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(st21nfcb_gates[j].gate != dm_pipe_info->dst_gate_id); j++)
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;
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if (j < ARRAY_SIZE(st21nfcb_gates) &&
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st21nfcb_gates[j].gate == dm_pipe_info->dst_gate_id &&
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ST21NFCB_DM_IS_PIPE_OPEN(dm_pipe_info->pipe_state)) {
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st21nfcb_gates[j].pipe = pipe_info[2];
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ndev->hci_dev->gate2pipe[st21nfcb_gates[j].gate] =
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st21nfcb_gates[j].pipe;
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ndev->hci_dev->pipes[st21nfcb_gates[j].pipe].gate =
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st21nfcb_gates[j].gate;
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ndev->hci_dev->pipes[st21nfcb_gates[j].pipe].host =
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dm_pipe_info->src_host_id;
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}
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}
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memcpy(ndev->hci_dev->init_data.gates, st21nfcb_gates,
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sizeof(st21nfcb_gates));
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free_info:
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kfree_skb(skb_pipe_info);
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kfree_skb(skb_pipe_list);
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return r;
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}
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EXPORT_SYMBOL_GPL(st21nfcb_hci_load_session);
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static void st21nfcb_hci_admin_event_received(struct nci_dev *ndev,
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u8 event, struct sk_buff *skb)
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{
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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switch (event) {
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case ST21NFCB_EVT_HOT_PLUG:
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if (info->se_info.se_active) {
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if (!ST21NFCB_EVT_HOT_PLUG_IS_INHIBITED(skb)) {
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del_timer_sync(&info->se_info.se_active_timer);
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info->se_info.se_active = false;
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complete(&info->se_info.req_completion);
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} else {
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mod_timer(&info->se_info.se_active_timer,
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jiffies +
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msecs_to_jiffies(ST21NFCB_SE_TO_PIPES));
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}
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}
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break;
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}
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}
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static int st21nfcb_hci_apdu_reader_event_received(struct nci_dev *ndev,
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u8 event,
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struct sk_buff *skb)
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{
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int r = 0;
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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pr_debug("apdu reader gate event: %x\n", event);
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switch (event) {
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case ST21NFCB_EVT_TRANSMIT_DATA:
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del_timer_sync(&info->se_info.bwi_timer);
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info->se_info.bwi_active = false;
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info->se_info.cb(info->se_info.cb_context,
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skb->data, skb->len, 0);
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break;
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case ST21NFCB_EVT_WTX_REQUEST:
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mod_timer(&info->se_info.bwi_timer, jiffies +
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msecs_to_jiffies(info->se_info.wt_timeout));
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break;
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}
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kfree_skb(skb);
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return r;
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}
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/*
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* Returns:
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* <= 0: driver handled the event, skb consumed
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* 1: driver does not handle the event, please do standard processing
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*/
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static int st21nfcb_hci_connectivity_event_received(struct nci_dev *ndev,
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u8 host, u8 event,
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struct sk_buff *skb)
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{
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int r = 0;
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pr_debug("connectivity gate event: %x\n", event);
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switch (event) {
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case ST21NFCB_EVT_CONNECTIVITY:
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break;
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case ST21NFCB_EVT_TRANSACTION:
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break;
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default:
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return 1;
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}
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kfree_skb(skb);
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return r;
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}
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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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{
|
||||
u8 gate = ndev->hci_dev->pipes[pipe].gate;
|
||||
u8 host = ndev->hci_dev->pipes[pipe].host;
|
||||
|
||||
switch (gate) {
|
||||
case NCI_HCI_ADMIN_GATE:
|
||||
st21nfcb_hci_admin_event_received(ndev, event, skb);
|
||||
break;
|
||||
case ST21NFCB_APDU_READER_GATE:
|
||||
st21nfcb_hci_apdu_reader_event_received(ndev, event, skb);
|
||||
break;
|
||||
case ST21NFCB_CONNECTIVITY_GATE:
|
||||
st21nfcb_hci_connectivity_event_received(ndev, host, event,
|
||||
skb);
|
||||
break;
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(st21nfcb_hci_event_received);
|
||||
|
||||
|
||||
void st21nfcb_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
|
||||
struct sk_buff *skb)
|
||||
{
|
||||
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
|
||||
u8 gate = ndev->hci_dev->pipes[pipe].gate;
|
||||
|
||||
pr_debug("cmd: %x\n", cmd);
|
||||
|
||||
switch (cmd) {
|
||||
case NCI_HCI_ANY_OPEN_PIPE:
|
||||
if (gate != ST21NFCB_APDU_READER_GATE &&
|
||||
ndev->hci_dev->pipes[pipe].host != ST21NFCB_UICC_HOST_ID)
|
||||
ndev->hci_dev->count_pipes++;
|
||||
|
||||
if (ndev->hci_dev->count_pipes ==
|
||||
ndev->hci_dev->expected_pipes) {
|
||||
del_timer_sync(&info->se_info.se_active_timer);
|
||||
info->se_info.se_active = false;
|
||||
ndev->hci_dev->count_pipes = 0;
|
||||
complete(&info->se_info.req_completion);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(st21nfcb_hci_cmd_received);
|
||||
|
||||
/*
|
||||
* Remarks: On some early st21nfcb firmware, nci_nfcee_mode_set(0)
|
||||
* is rejected
|
||||
*/
|
||||
static int st21nfcb_nci_control_se(struct nci_dev *ndev, u8 se_idx,
|
||||
u8 state)
|
||||
{
|
||||
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
|
||||
int r;
|
||||
struct sk_buff *sk_host_list;
|
||||
u8 host_id;
|
||||
|
||||
switch (se_idx) {
|
||||
case ST21NFCB_UICC_HOST_ID:
|
||||
ndev->hci_dev->count_pipes = 0;
|
||||
ndev->hci_dev->expected_pipes = ST21NFCB_SE_COUNT_PIPE_UICC;
|
||||
break;
|
||||
case ST21NFCB_ESE_HOST_ID:
|
||||
ndev->hci_dev->count_pipes = 0;
|
||||
ndev->hci_dev->expected_pipes = ST21NFCB_SE_COUNT_PIPE_EMBEDDED;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Wait for an EVT_HOT_PLUG in order to
|
||||
* retrieve a relevant host list.
|
||||
*/
|
||||
reinit_completion(&info->se_info.req_completion);
|
||||
r = nci_nfcee_mode_set(ndev, se_idx, NCI_NFCEE_ENABLE);
|
||||
if (r != NCI_STATUS_OK)
|
||||
return r;
|
||||
|
||||
mod_timer(&info->se_info.se_active_timer, jiffies +
|
||||
msecs_to_jiffies(ST21NFCB_SE_TO_HOT_PLUG));
|
||||
info->se_info.se_active = true;
|
||||
|
||||
/* Ignore return value and check in any case the host_list */
|
||||
wait_for_completion_interruptible(&info->se_info.req_completion);
|
||||
|
||||
/* There might be some "collision" after receiving a HOT_PLUG event
|
||||
* This may cause the CLF to not answer to the next hci command.
|
||||
* There is no possible synchronization to prevent this.
|
||||
* Adding a small delay is the only way to solve the issue.
|
||||
*/
|
||||
usleep_range(3000, 5000);
|
||||
|
||||
r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
|
||||
NCI_HCI_ADMIN_PARAM_HOST_LIST, &sk_host_list);
|
||||
if (r != NCI_HCI_ANY_OK)
|
||||
return r;
|
||||
|
||||
host_id = sk_host_list->data[sk_host_list->len - 1];
|
||||
kfree_skb(sk_host_list);
|
||||
if (state == ST21NFCB_SE_MODE_ON && host_id == se_idx)
|
||||
return se_idx;
|
||||
else if (state == ST21NFCB_SE_MODE_OFF && host_id != se_idx)
|
||||
return se_idx;
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
int st21nfcb_nci_disable_se(struct nci_dev *ndev, u32 se_idx)
|
||||
{
|
||||
int r;
|
||||
|
||||
pr_debug("st21nfcb_nci_disable_se\n");
|
||||
|
||||
if (se_idx == NFC_SE_EMBEDDED) {
|
||||
r = nci_hci_send_event(ndev, ST21NFCB_APDU_READER_GATE,
|
||||
ST21NFCB_EVT_SE_END_OF_APDU_TRANSFER, NULL, 0);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(st21nfcb_nci_disable_se);
|
||||
|
||||
int st21nfcb_nci_enable_se(struct nci_dev *ndev, u32 se_idx)
|
||||
{
|
||||
int r;
|
||||
|
||||
pr_debug("st21nfcb_nci_enable_se\n");
|
||||
|
||||
if (se_idx == ST21NFCB_HCI_HOST_ID_ESE) {
|
||||
r = nci_hci_send_event(ndev, ST21NFCB_APDU_READER_GATE,
|
||||
ST21NFCB_EVT_SE_SOFT_RESET, NULL, 0);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(st21nfcb_nci_enable_se);
|
||||
|
||||
static int st21nfcb_hci_network_init(struct nci_dev *ndev)
|
||||
{
|
||||
struct core_conn_create_dest_spec_params dest_params;
|
||||
struct nci_conn_info *conn_info;
|
||||
int r, dev_num;
|
||||
|
||||
r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
|
||||
if (r != NCI_STATUS_OK)
|
||||
goto exit;
|
||||
|
||||
dest_params.type = NCI_DESTINATION_SPECIFIC_PARAM_NFCEE_TYPE;
|
||||
dest_params.length = sizeof(struct dest_spec_params);
|
||||
dest_params.value.id = ndev->hci_dev->conn_info->id;
|
||||
dest_params.value.protocol = NCI_NFCEE_INTERFACE_HCI_ACCESS;
|
||||
r = nci_core_conn_create(ndev, &dest_params);
|
||||
if (r != NCI_STATUS_OK)
|
||||
goto exit;
|
||||
|
||||
conn_info = ndev->hci_dev->conn_info;
|
||||
if (!conn_info)
|
||||
goto exit;
|
||||
|
||||
memcpy(ndev->hci_dev->init_data.gates, st21nfcb_gates,
|
||||
sizeof(st21nfcb_gates));
|
||||
|
||||
/*
|
||||
* Session id must include the driver name + i2c bus addr
|
||||
* persistent info to discriminate 2 identical chips
|
||||
*/
|
||||
dev_num = find_first_zero_bit(dev_mask, ST21NFCB_NUM_DEVICES);
|
||||
if (dev_num >= ST21NFCB_NUM_DEVICES)
|
||||
return -ENODEV;
|
||||
|
||||
scnprintf(ndev->hci_dev->init_data.session_id,
|
||||
sizeof(ndev->hci_dev->init_data.session_id),
|
||||
"%s%2x", "ST21BH", dev_num);
|
||||
|
||||
r = nci_hci_dev_session_init(ndev);
|
||||
if (r != NCI_HCI_ANY_OK)
|
||||
goto exit;
|
||||
|
||||
r = nci_nfcee_mode_set(ndev, ndev->hci_dev->conn_info->id,
|
||||
NCI_NFCEE_ENABLE);
|
||||
if (r != NCI_STATUS_OK)
|
||||
goto exit;
|
||||
|
||||
return 0;
|
||||
|
||||
exit:
|
||||
return r;
|
||||
}
|
||||
|
||||
int st21nfcb_nci_discover_se(struct nci_dev *ndev)
|
||||
{
|
||||
u8 param[2];
|
||||
int r;
|
||||
int se_count = 0;
|
||||
|
||||
pr_debug("st21nfcb_nci_discover_se\n");
|
||||
|
||||
r = st21nfcb_hci_network_init(ndev);
|
||||
if (r != 0)
|
||||
return r;
|
||||
|
||||
param[0] = ST21NFCB_UICC_HOST_ID;
|
||||
param[1] = ST21NFCB_HCI_HOST_ID_ESE;
|
||||
r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
|
||||
NCI_HCI_ADMIN_PARAM_WHITELIST,
|
||||
param, sizeof(param));
|
||||
if (r != NCI_HCI_ANY_OK)
|
||||
return r;
|
||||
|
||||
r = st21nfcb_nci_control_se(ndev, ST21NFCB_UICC_HOST_ID,
|
||||
ST21NFCB_SE_MODE_ON);
|
||||
if (r == ST21NFCB_UICC_HOST_ID) {
|
||||
nfc_add_se(ndev->nfc_dev, ST21NFCB_UICC_HOST_ID, NFC_SE_UICC);
|
||||
se_count++;
|
||||
}
|
||||
|
||||
/* Try to enable eSE in order to check availability */
|
||||
r = st21nfcb_nci_control_se(ndev, ST21NFCB_HCI_HOST_ID_ESE,
|
||||
ST21NFCB_SE_MODE_ON);
|
||||
if (r == ST21NFCB_HCI_HOST_ID_ESE) {
|
||||
nfc_add_se(ndev->nfc_dev, ST21NFCB_HCI_HOST_ID_ESE,
|
||||
NFC_SE_EMBEDDED);
|
||||
se_count++;
|
||||
st21nfcb_se_get_atr(ndev);
|
||||
}
|
||||
|
||||
return !se_count;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(st21nfcb_nci_discover_se);
|
||||
|
||||
int st21nfcb_nci_se_io(struct nci_dev *ndev, u32 se_idx,
|
||||
u8 *apdu, size_t apdu_length,
|
||||
se_io_cb_t cb, void *cb_context)
|
||||
{
|
||||
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
switch (se_idx) {
|
||||
case ST21NFCB_HCI_HOST_ID_ESE:
|
||||
info->se_info.cb = cb;
|
||||
info->se_info.cb_context = cb_context;
|
||||
mod_timer(&info->se_info.bwi_timer, jiffies +
|
||||
msecs_to_jiffies(info->se_info.wt_timeout));
|
||||
info->se_info.bwi_active = true;
|
||||
return nci_hci_send_event(ndev, ST21NFCB_APDU_READER_GATE,
|
||||
ST21NFCB_EVT_TRANSMIT_DATA, apdu,
|
||||
apdu_length);
|
||||
default:
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(st21nfcb_nci_se_io);
|
||||
|
||||
static void st21nfcb_se_wt_timeout(unsigned long data)
|
||||
{
|
||||
/*
|
||||
* No answer from the secure element
|
||||
* within the defined timeout.
|
||||
* Let's send a reset request as recovery procedure.
|
||||
* According to the situation, we first try to send a software reset
|
||||
* to the secure element. If the next command is still not
|
||||
* answering in time, we send to the CLF a secure element hardware
|
||||
* reset request.
|
||||
*/
|
||||
/* hardware reset managed through VCC_UICC_OUT power supply */
|
||||
u8 param = 0x01;
|
||||
struct st21nfcb_nci_info *info = (struct st21nfcb_nci_info *) data;
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
info->se_info.bwi_active = false;
|
||||
|
||||
if (!info->se_info.xch_error) {
|
||||
info->se_info.xch_error = true;
|
||||
nci_hci_send_event(info->ndlc->ndev, ST21NFCB_APDU_READER_GATE,
|
||||
ST21NFCB_EVT_SE_SOFT_RESET, NULL, 0);
|
||||
} else {
|
||||
info->se_info.xch_error = false;
|
||||
nci_hci_send_event(info->ndlc->ndev, ST21NFCB_DEVICE_MGNT_GATE,
|
||||
ST21NFCB_EVT_SE_HARD_RESET, ¶m, 1);
|
||||
}
|
||||
info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME);
|
||||
}
|
||||
|
||||
static void st21nfcb_se_activation_timeout(unsigned long data)
|
||||
{
|
||||
struct st21nfcb_nci_info *info = (struct st21nfcb_nci_info *) data;
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
info->se_info.se_active = false;
|
||||
|
||||
complete(&info->se_info.req_completion);
|
||||
}
|
||||
|
||||
int st21nfcb_se_init(struct nci_dev *ndev)
|
||||
{
|
||||
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
|
||||
|
||||
init_completion(&info->se_info.req_completion);
|
||||
/* initialize timers */
|
||||
init_timer(&info->se_info.bwi_timer);
|
||||
info->se_info.bwi_timer.data = (unsigned long)info;
|
||||
info->se_info.bwi_timer.function = st21nfcb_se_wt_timeout;
|
||||
info->se_info.bwi_active = false;
|
||||
|
||||
init_timer(&info->se_info.se_active_timer);
|
||||
info->se_info.se_active_timer.data = (unsigned long)info;
|
||||
info->se_info.se_active_timer.function =
|
||||
st21nfcb_se_activation_timeout;
|
||||
info->se_info.se_active = false;
|
||||
|
||||
info->se_info.xch_error = false;
|
||||
|
||||
info->se_info.wt_timeout =
|
||||
ST21NFCB_BWI_TO_TIMEOUT(ST21NFCB_ATR_DEFAULT_BWI);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(st21nfcb_se_init);
|
||||
|
||||
void st21nfcb_se_deinit(struct nci_dev *ndev)
|
||||
{
|
||||
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
|
||||
|
||||
if (info->se_info.bwi_active)
|
||||
del_timer_sync(&info->se_info.bwi_timer);
|
||||
if (info->se_info.se_active)
|
||||
del_timer_sync(&info->se_info.se_active_timer);
|
||||
|
||||
info->se_info.se_active = false;
|
||||
info->se_info.bwi_active = false;
|
||||
}
|
||||
EXPORT_SYMBOL(st21nfcb_se_deinit);
|
||||
|
||||
61
drivers/nfc/st21nfcb/st21nfcb_se.h
Normal file
61
drivers/nfc/st21nfcb/st21nfcb_se.h
Normal file
@ -0,0 +1,61 @@
|
||||
/*
|
||||
* NCI based Driver for STMicroelectronics NFC Chip
|
||||
*
|
||||
* Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
#ifndef __LOCAL_ST21NFCB_SE_H_
|
||||
#define __LOCAL_ST21NFCB_SE_H_
|
||||
|
||||
/*
|
||||
* ref ISO7816-3 chap 8.1. the initial character TS is followed by a
|
||||
* sequence of at most 32 characters.
|
||||
*/
|
||||
#define ST21NFCB_ESE_MAX_LENGTH 33
|
||||
#define ST21NFCB_HCI_HOST_ID_ESE 0xc0
|
||||
|
||||
struct st21nfcb_se_info {
|
||||
u8 atr[ST21NFCB_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;
|
||||
|
||||
bool xch_error;
|
||||
|
||||
se_io_cb_t cb;
|
||||
void *cb_context;
|
||||
};
|
||||
|
||||
int st21nfcb_se_init(struct nci_dev *ndev);
|
||||
void st21nfcb_se_deinit(struct nci_dev *ndev);
|
||||
|
||||
int st21nfcb_nci_discover_se(struct nci_dev *ndev);
|
||||
int st21nfcb_nci_enable_se(struct nci_dev *ndev, u32 se_idx);
|
||||
int st21nfcb_nci_disable_se(struct nci_dev *ndev, u32 se_idx);
|
||||
int st21nfcb_nci_se_io(struct nci_dev *ndev, u32 se_idx,
|
||||
u8 *apdu, size_t apdu_length,
|
||||
se_io_cb_t cb, void *cb_context);
|
||||
int st21nfcb_hci_load_session(struct nci_dev *ndev);
|
||||
void st21nfcb_hci_event_received(struct nci_dev *ndev, u8 pipe,
|
||||
u8 event, struct sk_buff *skb);
|
||||
void st21nfcb_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
|
||||
struct sk_buff *skb);
|
||||
|
||||
|
||||
#endif /* __LOCAL_ST21NFCB_NCI_H_ */
|
||||
Loading…
Reference in New Issue
Block a user