740 lines
20 KiB
C
740 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Secure Element driver for STMicroelectronics NFC NCI chip
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*
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* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
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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 "st-nci.h"
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struct st_nci_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 ST_NCI_HOST_CONTROLLER_ID 0x00
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#define ST_NCI_TERMINAL_HOST_ID 0x01
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#define ST_NCI_UICC_HOST_ID 0x02
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#define ST_NCI_ESE_HOST_ID 0xc0
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/* Gates */
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#define ST_NCI_APDU_READER_GATE 0xf0
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#define ST_NCI_CONNECTIVITY_GATE 0x41
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/* Pipes */
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#define ST_NCI_DEVICE_MGNT_PIPE 0x02
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/* Connectivity pipe only */
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#define ST_NCI_SE_COUNT_PIPE_UICC 0x01
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/* Connectivity + APDU Reader pipe */
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#define ST_NCI_SE_COUNT_PIPE_EMBEDDED 0x02
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#define ST_NCI_SE_TO_HOT_PLUG 1000 /* msecs */
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#define ST_NCI_SE_TO_PIPES 2000
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#define ST_NCI_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 ST_NCI_EVT_SE_HARD_RESET 0x20
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#define ST_NCI_EVT_TRANSMIT_DATA 0x10
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#define ST_NCI_EVT_WTX_REQUEST 0x11
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#define ST_NCI_EVT_SE_SOFT_RESET 0x11
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#define ST_NCI_EVT_SE_END_OF_APDU_TRANSFER 0x21
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#define ST_NCI_EVT_HOT_PLUG 0x03
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#define ST_NCI_SE_MODE_OFF 0x00
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#define ST_NCI_SE_MODE_ON 0x01
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#define ST_NCI_EVT_CONNECTIVITY 0x10
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#define ST_NCI_EVT_TRANSACTION 0x12
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#define ST_NCI_DM_GETINFO 0x13
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#define ST_NCI_DM_GETINFO_PIPE_LIST 0x02
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#define ST_NCI_DM_GETINFO_PIPE_INFO 0x01
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#define ST_NCI_DM_PIPE_CREATED 0x02
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#define ST_NCI_DM_PIPE_OPEN 0x04
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#define ST_NCI_DM_RF_ACTIVE 0x80
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#define ST_NCI_DM_DISCONNECT 0x30
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#define ST_NCI_DM_IS_PIPE_OPEN(p) \
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((p & 0x0f) == (ST_NCI_DM_PIPE_CREATED | ST_NCI_DM_PIPE_OPEN))
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#define ST_NCI_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 ST_NCI_BWI_TO_TIMEOUT(x) ((1 << x) * 200)
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#define ST_NCI_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 ST_NCI_ATR_TA_PRESENT(x) (x & 0x01)
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/* If TB is present bit 1 is set */
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#define ST_NCI_ATR_TB_PRESENT(x) (x & 0x02)
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#define ST_NCI_NUM_DEVICES 256
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static DECLARE_BITMAP(dev_mask, ST_NCI_NUM_DEVICES);
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/* Here are the mandatory pipe for st_nci */
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static struct nci_hci_gate st_nci_gates[] = {
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{NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PIPE,
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ST_NCI_HOST_CONTROLLER_ID},
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{NCI_HCI_LINK_MGMT_GATE, NCI_HCI_LINK_MGMT_PIPE,
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ST_NCI_HOST_CONTROLLER_ID},
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{ST_NCI_DEVICE_MGNT_GATE, ST_NCI_DEVICE_MGNT_PIPE,
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ST_NCI_HOST_CONTROLLER_ID},
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{NCI_HCI_IDENTITY_MGMT_GATE, NCI_HCI_INVALID_PIPE,
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ST_NCI_HOST_CONTROLLER_ID},
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/* Secure element pipes are created by secure element host */
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{ST_NCI_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
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ST_NCI_HOST_CONTROLLER_ID},
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{ST_NCI_APDU_READER_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
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ST_NCI_HOST_CONTROLLER_ID},
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};
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static u8 st_nci_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 st_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 < ST_NCI_ESE_MAX_LENGTH; i++) {
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td = ST_NCI_ATR_GET_Y_FROM_TD(info->se_info.atr[i]);
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if (ST_NCI_ATR_TA_PRESENT(td))
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i++;
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if (ST_NCI_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 ST_NCI_ATR_DEFAULT_BWI;
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}
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static void st_nci_se_get_atr(struct nci_dev *ndev)
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{
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struct st_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, ST_NCI_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 <= ST_NCI_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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ST_NCI_BWI_TO_TIMEOUT(st_nci_se_get_bwi(ndev));
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}
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kfree_skb(skb);
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}
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int st_nci_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 st_nci_pipe_info *dm_pipe_info;
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u8 pipe_list[] = { ST_NCI_DM_GETINFO_PIPE_LIST,
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ST_NCI_TERMINAL_HOST_ID};
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u8 pipe_info[] = { ST_NCI_DM_GETINFO_PIPE_INFO,
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ST_NCI_TERMINAL_HOST_ID, 0};
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/* On ST_NCI 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 ST_NCI is to:
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* - get a pipe list for each host.
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* (eg: ST_NCI_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 st_nci_gates
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* ST_NCI_DEVICE_MGNT_GATE is a proprietary gate
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* with ST_NCI_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, ST_NCI_HOST_CONTROLLER_ID,
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ST_NCI_DEVICE_MGNT_GATE,
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ST_NCI_DEVICE_MGNT_PIPE);
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if (r < 0)
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return r;
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/* Get pipe list */
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r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
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ST_NCI_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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return r;
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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, ST_NCI_DEVICE_MGNT_GATE,
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ST_NCI_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 st_nci_pipe_info *)skb_pipe_info->data;
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if (dm_pipe_info->dst_gate_id == ST_NCI_APDU_READER_GATE &&
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dm_pipe_info->src_host_id == ST_NCI_UICC_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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kfree_skb(skb_pipe_info);
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continue;
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}
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for (j = 3; (j < ARRAY_SIZE(st_nci_gates)) &&
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(st_nci_gates[j].gate != dm_pipe_info->dst_gate_id); j++)
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;
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if (j < ARRAY_SIZE(st_nci_gates) &&
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st_nci_gates[j].gate == dm_pipe_info->dst_gate_id &&
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ST_NCI_DM_IS_PIPE_OPEN(dm_pipe_info->pipe_state)) {
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ndev->hci_dev->init_data.gates[j].pipe = pipe_info[2];
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ndev->hci_dev->gate2pipe[st_nci_gates[j].gate] =
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pipe_info[2];
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ndev->hci_dev->pipes[pipe_info[2]].gate =
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st_nci_gates[j].gate;
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ndev->hci_dev->pipes[pipe_info[2]].host =
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dm_pipe_info->src_host_id;
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}
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kfree_skb(skb_pipe_info);
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}
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/*
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* 3 gates have a well known pipe ID. Only NCI_HCI_LINK_MGMT_GATE
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* is not yet open at this stage.
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*/
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r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
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NCI_HCI_LINK_MGMT_GATE,
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NCI_HCI_LINK_MGMT_PIPE);
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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(st_nci_hci_load_session);
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static void st_nci_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 st_nci_info *info = nci_get_drvdata(ndev);
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switch (event) {
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case ST_NCI_EVT_HOT_PLUG:
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if (info->se_info.se_active) {
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if (!ST_NCI_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(ST_NCI_SE_TO_PIPES));
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}
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}
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break;
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default:
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nfc_err(&ndev->nfc_dev->dev, "Unexpected event on admin gate\n");
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}
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}
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static int st_nci_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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struct st_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 ST_NCI_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 ST_NCI_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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default:
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nfc_err(&ndev->nfc_dev->dev, "Unexpected event on apdu reader gate\n");
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return 1;
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}
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kfree_skb(skb);
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return 0;
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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 st_nci_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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struct device *dev = &ndev->nfc_dev->dev;
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struct nfc_evt_transaction *transaction;
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pr_debug("connectivity gate event: %x\n", event);
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switch (event) {
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case ST_NCI_EVT_CONNECTIVITY:
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r = nfc_se_connectivity(ndev->nfc_dev, host);
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break;
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case ST_NCI_EVT_TRANSACTION:
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/* According to specification etsi 102 622
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* 11.2.2.4 EVT_TRANSACTION Table 52
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* Description Tag Length
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* AID 81 5 to 16
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* PARAMETERS 82 0 to 255
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*/
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if (skb->len < NFC_MIN_AID_LENGTH + 2 &&
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skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG)
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return -EPROTO;
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transaction = devm_kzalloc(dev, skb->len - 2, GFP_KERNEL);
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if (!transaction)
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return -ENOMEM;
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transaction->aid_len = skb->data[1];
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memcpy(transaction->aid, &skb->data[2], transaction->aid_len);
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/* Check next byte is PARAMETERS tag (82) */
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if (skb->data[transaction->aid_len + 2] !=
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NFC_EVT_TRANSACTION_PARAMS_TAG)
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return -EPROTO;
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transaction->params_len = skb->data[transaction->aid_len + 3];
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memcpy(transaction->params, skb->data +
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transaction->aid_len + 4, transaction->params_len);
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r = nfc_se_transaction(ndev->nfc_dev, host, transaction);
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break;
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default:
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nfc_err(&ndev->nfc_dev->dev, "Unexpected event on connectivity gate\n");
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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 st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
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u8 event, struct sk_buff *skb)
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{
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u8 gate = ndev->hci_dev->pipes[pipe].gate;
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u8 host = ndev->hci_dev->pipes[pipe].host;
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switch (gate) {
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case NCI_HCI_ADMIN_GATE:
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st_nci_hci_admin_event_received(ndev, event, skb);
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break;
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case ST_NCI_APDU_READER_GATE:
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st_nci_hci_apdu_reader_event_received(ndev, event, skb);
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break;
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case ST_NCI_CONNECTIVITY_GATE:
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st_nci_hci_connectivity_event_received(ndev, host, event, skb);
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break;
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}
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}
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EXPORT_SYMBOL_GPL(st_nci_hci_event_received);
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void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
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struct sk_buff *skb)
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{
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struct st_nci_info *info = nci_get_drvdata(ndev);
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u8 gate = ndev->hci_dev->pipes[pipe].gate;
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pr_debug("cmd: %x\n", cmd);
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switch (cmd) {
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case NCI_HCI_ANY_OPEN_PIPE:
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if (gate != ST_NCI_APDU_READER_GATE &&
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ndev->hci_dev->pipes[pipe].host != ST_NCI_UICC_HOST_ID)
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ndev->hci_dev->count_pipes++;
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if (ndev->hci_dev->count_pipes ==
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ndev->hci_dev->expected_pipes) {
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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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ndev->hci_dev->count_pipes = 0;
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complete(&info->se_info.req_completion);
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}
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break;
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}
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}
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EXPORT_SYMBOL_GPL(st_nci_hci_cmd_received);
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static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
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u8 state)
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{
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struct st_nci_info *info = nci_get_drvdata(ndev);
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int r, i;
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struct sk_buff *sk_host_list;
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u8 host_id;
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switch (se_idx) {
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case ST_NCI_UICC_HOST_ID:
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ndev->hci_dev->count_pipes = 0;
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ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_UICC;
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break;
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case ST_NCI_ESE_HOST_ID:
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ndev->hci_dev->count_pipes = 0;
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ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_EMBEDDED;
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break;
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default:
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return -EINVAL;
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}
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/*
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* Wait for an EVT_HOT_PLUG in order to
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* retrieve a relevant host list.
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*/
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reinit_completion(&info->se_info.req_completion);
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r = nci_nfcee_mode_set(ndev, se_idx, state);
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if (r != NCI_STATUS_OK)
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return r;
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mod_timer(&info->se_info.se_active_timer, jiffies +
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msecs_to_jiffies(ST_NCI_SE_TO_HOT_PLUG));
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info->se_info.se_active = true;
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/* Ignore return value and check in any case the host_list */
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wait_for_completion_interruptible(&info->se_info.req_completion);
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/* There might be some "collision" after receiving a HOT_PLUG event
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* This may cause the CLF to not answer to the next hci command.
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* There is no possible synchronization to prevent this.
|
|
* Adding a small delay is the only way to solve the issue.
|
|
*/
|
|
if (info->se_info.se_status->is_ese_present &&
|
|
info->se_info.se_status->is_uicc_present)
|
|
usleep_range(15000, 20000);
|
|
|
|
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;
|
|
|
|
for (i = 0; i < sk_host_list->len &&
|
|
sk_host_list->data[i] != se_idx; i++)
|
|
;
|
|
host_id = sk_host_list->data[i];
|
|
kfree_skb(sk_host_list);
|
|
if (state == ST_NCI_SE_MODE_ON && host_id == se_idx)
|
|
return se_idx;
|
|
else if (state == ST_NCI_SE_MODE_OFF && host_id != se_idx)
|
|
return se_idx;
|
|
|
|
return -1;
|
|
}
|
|
|
|
int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx)
|
|
{
|
|
int r;
|
|
|
|
/*
|
|
* According to upper layer, se_idx == NFC_SE_UICC when
|
|
* info->se_info.se_status->is_uicc_enable is true should never happen
|
|
* Same for eSE.
|
|
*/
|
|
r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_OFF);
|
|
if (r < 0) {
|
|
/* Do best effort to release SWP */
|
|
if (se_idx == NFC_SE_EMBEDDED) {
|
|
r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
|
|
ST_NCI_EVT_SE_END_OF_APDU_TRANSFER,
|
|
NULL, 0);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(st_nci_disable_se);
|
|
|
|
int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx)
|
|
{
|
|
int r;
|
|
|
|
/*
|
|
* According to upper layer, se_idx == NFC_SE_UICC when
|
|
* info->se_info.se_status->is_uicc_enable is true should never happen.
|
|
* Same for eSE.
|
|
*/
|
|
r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_ON);
|
|
if (r == ST_NCI_ESE_HOST_ID) {
|
|
st_nci_se_get_atr(ndev);
|
|
r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
|
|
ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
|
|
}
|
|
|
|
if (r < 0) {
|
|
/*
|
|
* The activation procedure failed, the secure element
|
|
* is not connected. Remove from the list.
|
|
*/
|
|
nfc_remove_se(ndev->nfc_dev, se_idx);
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(st_nci_enable_se);
|
|
|
|
static int st_nci_hci_network_init(struct nci_dev *ndev)
|
|
{
|
|
struct st_nci_info *info = nci_get_drvdata(ndev);
|
|
struct core_conn_create_dest_spec_params *dest_params;
|
|
struct dest_spec_params spec_params;
|
|
struct nci_conn_info *conn_info;
|
|
int r, dev_num;
|
|
|
|
dest_params =
|
|
kzalloc(sizeof(struct core_conn_create_dest_spec_params) +
|
|
sizeof(struct dest_spec_params), GFP_KERNEL);
|
|
if (dest_params == NULL)
|
|
return -ENOMEM;
|
|
|
|
dest_params->type = NCI_DESTINATION_SPECIFIC_PARAM_NFCEE_TYPE;
|
|
dest_params->length = sizeof(struct dest_spec_params);
|
|
spec_params.id = ndev->hci_dev->nfcee_id;
|
|
spec_params.protocol = NCI_NFCEE_INTERFACE_HCI_ACCESS;
|
|
memcpy(dest_params->value, &spec_params,
|
|
sizeof(struct dest_spec_params));
|
|
r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCEE, 1,
|
|
sizeof(struct core_conn_create_dest_spec_params) +
|
|
sizeof(struct dest_spec_params),
|
|
dest_params);
|
|
if (r != NCI_STATUS_OK)
|
|
goto free_dest_params;
|
|
|
|
conn_info = ndev->hci_dev->conn_info;
|
|
if (!conn_info)
|
|
goto free_dest_params;
|
|
|
|
ndev->hci_dev->init_data.gate_count = ARRAY_SIZE(st_nci_gates);
|
|
memcpy(ndev->hci_dev->init_data.gates, st_nci_gates,
|
|
sizeof(st_nci_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, ST_NCI_NUM_DEVICES);
|
|
if (dev_num >= ST_NCI_NUM_DEVICES) {
|
|
r = -ENODEV;
|
|
goto free_dest_params;
|
|
}
|
|
|
|
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 free_dest_params;
|
|
|
|
/*
|
|
* In factory mode, we prevent secure elements activation
|
|
* by disabling nfcee on the current HCI connection id.
|
|
* HCI will be used here only for proprietary commands.
|
|
*/
|
|
if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
|
|
r = nci_nfcee_mode_set(ndev,
|
|
ndev->hci_dev->conn_info->dest_params->id,
|
|
NCI_NFCEE_DISABLE);
|
|
else
|
|
r = nci_nfcee_mode_set(ndev,
|
|
ndev->hci_dev->conn_info->dest_params->id,
|
|
NCI_NFCEE_ENABLE);
|
|
|
|
free_dest_params:
|
|
kfree(dest_params);
|
|
return r;
|
|
}
|
|
|
|
int st_nci_discover_se(struct nci_dev *ndev)
|
|
{
|
|
u8 white_list[2];
|
|
int r, wl_size = 0;
|
|
int se_count = 0;
|
|
struct st_nci_info *info = nci_get_drvdata(ndev);
|
|
|
|
r = st_nci_hci_network_init(ndev);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
|
|
return 0;
|
|
|
|
if (info->se_info.se_status->is_uicc_present)
|
|
white_list[wl_size++] = ST_NCI_UICC_HOST_ID;
|
|
if (info->se_info.se_status->is_ese_present)
|
|
white_list[wl_size++] = ST_NCI_ESE_HOST_ID;
|
|
|
|
if (wl_size) {
|
|
r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
|
|
NCI_HCI_ADMIN_PARAM_WHITELIST,
|
|
white_list, wl_size);
|
|
if (r != NCI_HCI_ANY_OK)
|
|
return r;
|
|
}
|
|
|
|
if (info->se_info.se_status->is_uicc_present) {
|
|
nfc_add_se(ndev->nfc_dev, ST_NCI_UICC_HOST_ID, NFC_SE_UICC);
|
|
se_count++;
|
|
}
|
|
|
|
if (info->se_info.se_status->is_ese_present) {
|
|
nfc_add_se(ndev->nfc_dev, ST_NCI_ESE_HOST_ID, NFC_SE_EMBEDDED);
|
|
se_count++;
|
|
}
|
|
|
|
return !se_count;
|
|
}
|
|
EXPORT_SYMBOL_GPL(st_nci_discover_se);
|
|
|
|
int st_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 st_nci_info *info = nci_get_drvdata(ndev);
|
|
|
|
pr_debug("\n");
|
|
|
|
switch (se_idx) {
|
|
case ST_NCI_ESE_HOST_ID:
|
|
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, ST_NCI_APDU_READER_GATE,
|
|
ST_NCI_EVT_TRANSMIT_DATA, apdu,
|
|
apdu_length);
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(st_nci_se_io);
|
|
|
|
static void st_nci_se_wt_timeout(struct timer_list *t)
|
|
{
|
|
/*
|
|
* 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 st_nci_info *info = from_timer(info, t, se_info.bwi_timer);
|
|
|
|
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, ST_NCI_APDU_READER_GATE,
|
|
ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
|
|
} else {
|
|
info->se_info.xch_error = false;
|
|
nci_hci_send_event(info->ndlc->ndev, ST_NCI_DEVICE_MGNT_GATE,
|
|
ST_NCI_EVT_SE_HARD_RESET, ¶m, 1);
|
|
}
|
|
info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME);
|
|
}
|
|
|
|
static void st_nci_se_activation_timeout(struct timer_list *t)
|
|
{
|
|
struct st_nci_info *info = from_timer(info, t,
|
|
se_info.se_active_timer);
|
|
|
|
pr_debug("\n");
|
|
|
|
info->se_info.se_active = false;
|
|
|
|
complete(&info->se_info.req_completion);
|
|
}
|
|
|
|
int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status)
|
|
{
|
|
struct st_nci_info *info = nci_get_drvdata(ndev);
|
|
|
|
init_completion(&info->se_info.req_completion);
|
|
/* initialize timers */
|
|
timer_setup(&info->se_info.bwi_timer, st_nci_se_wt_timeout, 0);
|
|
info->se_info.bwi_active = false;
|
|
|
|
timer_setup(&info->se_info.se_active_timer,
|
|
st_nci_se_activation_timeout, 0);
|
|
info->se_info.se_active = false;
|
|
|
|
info->se_info.xch_error = false;
|
|
|
|
info->se_info.wt_timeout =
|
|
ST_NCI_BWI_TO_TIMEOUT(ST_NCI_ATR_DEFAULT_BWI);
|
|
|
|
info->se_info.se_status = se_status;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(st_nci_se_init);
|
|
|
|
void st_nci_se_deinit(struct nci_dev *ndev)
|
|
{
|
|
struct st_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(st_nci_se_deinit);
|
|
|