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linux/drivers/nfc/st-nci/se.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Secure Element driver for STMicroelectronics NFC NCI chip
*
* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
*/
#include <linux/module.h>
#include <linux/nfc.h>
#include <linux/delay.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
#include "st-nci.h"
struct st_nci_pipe_info {
u8 pipe_state;
u8 src_host_id;
u8 src_gate_id;
u8 dst_host_id;
u8 dst_gate_id;
} __packed;
/* Hosts */
#define ST_NCI_HOST_CONTROLLER_ID 0x00
#define ST_NCI_TERMINAL_HOST_ID 0x01
#define ST_NCI_UICC_HOST_ID 0x02
#define ST_NCI_ESE_HOST_ID 0xc0
/* Gates */
#define ST_NCI_APDU_READER_GATE 0xf0
#define ST_NCI_CONNECTIVITY_GATE 0x41
/* Pipes */
#define ST_NCI_DEVICE_MGNT_PIPE 0x02
/* Connectivity pipe only */
#define ST_NCI_SE_COUNT_PIPE_UICC 0x01
/* Connectivity + APDU Reader pipe */
#define ST_NCI_SE_COUNT_PIPE_EMBEDDED 0x02
#define ST_NCI_SE_TO_HOT_PLUG 1000 /* msecs */
#define ST_NCI_SE_TO_PIPES 2000
#define ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80)
#define NCI_HCI_APDU_PARAM_ATR 0x01
#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01
#define NCI_HCI_ADMIN_PARAM_WHITELIST 0x03
#define NCI_HCI_ADMIN_PARAM_HOST_LIST 0x04
#define ST_NCI_EVT_SE_HARD_RESET 0x20
#define ST_NCI_EVT_TRANSMIT_DATA 0x10
#define ST_NCI_EVT_WTX_REQUEST 0x11
#define ST_NCI_EVT_SE_SOFT_RESET 0x11
#define ST_NCI_EVT_SE_END_OF_APDU_TRANSFER 0x21
#define ST_NCI_EVT_HOT_PLUG 0x03
#define ST_NCI_SE_MODE_OFF 0x00
#define ST_NCI_SE_MODE_ON 0x01
#define ST_NCI_EVT_CONNECTIVITY 0x10
#define ST_NCI_EVT_TRANSACTION 0x12
#define ST_NCI_DM_GETINFO 0x13
#define ST_NCI_DM_GETINFO_PIPE_LIST 0x02
#define ST_NCI_DM_GETINFO_PIPE_INFO 0x01
#define ST_NCI_DM_PIPE_CREATED 0x02
#define ST_NCI_DM_PIPE_OPEN 0x04
#define ST_NCI_DM_RF_ACTIVE 0x80
#define ST_NCI_DM_DISCONNECT 0x30
#define ST_NCI_DM_IS_PIPE_OPEN(p) \
((p & 0x0f) == (ST_NCI_DM_PIPE_CREATED | ST_NCI_DM_PIPE_OPEN))
#define ST_NCI_ATR_DEFAULT_BWI 0x04
/*
* WT = 2^BWI/10[s], convert into msecs and add a secure
* room by increasing by 2 this timeout
*/
#define ST_NCI_BWI_TO_TIMEOUT(x) ((1 << x) * 200)
#define ST_NCI_ATR_GET_Y_FROM_TD(x) (x >> 4)
/* If TA is present bit 0 is set */
#define ST_NCI_ATR_TA_PRESENT(x) (x & 0x01)
/* If TB is present bit 1 is set */
#define ST_NCI_ATR_TB_PRESENT(x) (x & 0x02)
#define ST_NCI_NUM_DEVICES 256
static DECLARE_BITMAP(dev_mask, ST_NCI_NUM_DEVICES);
/* Here are the mandatory pipe for st_nci */
static struct nci_hci_gate st_nci_gates[] = {
{NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PIPE,
ST_NCI_HOST_CONTROLLER_ID},
{NCI_HCI_LINK_MGMT_GATE, NCI_HCI_LINK_MGMT_PIPE,
ST_NCI_HOST_CONTROLLER_ID},
{ST_NCI_DEVICE_MGNT_GATE, ST_NCI_DEVICE_MGNT_PIPE,
ST_NCI_HOST_CONTROLLER_ID},
{NCI_HCI_IDENTITY_MGMT_GATE, NCI_HCI_INVALID_PIPE,
ST_NCI_HOST_CONTROLLER_ID},
/* Secure element pipes are created by secure element host */
{ST_NCI_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
ST_NCI_HOST_CONTROLLER_ID},
{ST_NCI_APDU_READER_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
ST_NCI_HOST_CONTROLLER_ID},
};
static u8 st_nci_se_get_bwi(struct nci_dev *ndev)
{
int i;
u8 td;
struct st_nci_info *info = nci_get_drvdata(ndev);
/* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */
for (i = 1; i < ST_NCI_ESE_MAX_LENGTH; i++) {
td = ST_NCI_ATR_GET_Y_FROM_TD(info->se_info.atr[i]);
if (ST_NCI_ATR_TA_PRESENT(td))
i++;
if (ST_NCI_ATR_TB_PRESENT(td)) {
i++;
return info->se_info.atr[i] >> 4;
}
}
return ST_NCI_ATR_DEFAULT_BWI;
}
static void st_nci_se_get_atr(struct nci_dev *ndev)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
int r;
struct sk_buff *skb;
r = nci_hci_get_param(ndev, ST_NCI_APDU_READER_GATE,
NCI_HCI_APDU_PARAM_ATR, &skb);
if (r < 0)
return;
if (skb->len <= ST_NCI_ESE_MAX_LENGTH) {
memcpy(info->se_info.atr, skb->data, skb->len);
info->se_info.wt_timeout =
ST_NCI_BWI_TO_TIMEOUT(st_nci_se_get_bwi(ndev));
}
kfree_skb(skb);
}
int st_nci_hci_load_session(struct nci_dev *ndev)
{
int i, j, r;
struct sk_buff *skb_pipe_list, *skb_pipe_info;
struct st_nci_pipe_info *dm_pipe_info;
u8 pipe_list[] = { ST_NCI_DM_GETINFO_PIPE_LIST,
ST_NCI_TERMINAL_HOST_ID};
u8 pipe_info[] = { ST_NCI_DM_GETINFO_PIPE_INFO,
ST_NCI_TERMINAL_HOST_ID, 0};
/* On ST_NCI device pipes number are dynamics
* If pipes are already created, hci_dev_up will fail.
* Doing a clear all pipe is a bad idea because:
* - It does useless EEPROM cycling
* - It might cause issue for secure elements support
* (such as removing connectivity or APDU reader pipe)
* A better approach on ST_NCI is to:
* - get a pipe list for each host.
* (eg: ST_NCI_HOST_CONTROLLER_ID for now).
* (TODO Later on UICC HOST and eSE HOST)
* - get pipe information
* - match retrieved pipe list in st_nci_gates
* ST_NCI_DEVICE_MGNT_GATE is a proprietary gate
* with ST_NCI_DEVICE_MGNT_PIPE.
* Pipe can be closed and need to be open.
*/
r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_DEVICE_MGNT_PIPE);
if (r < 0)
return r;
/* Get pipe list */
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_DM_GETINFO, pipe_list, sizeof(pipe_list),
&skb_pipe_list);
if (r < 0)
return r;
/* Complete the existing gate_pipe table */
for (i = 0; i < skb_pipe_list->len; i++) {
pipe_info[2] = skb_pipe_list->data[i];
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_DM_GETINFO, pipe_info,
sizeof(pipe_info), &skb_pipe_info);
if (r)
continue;
/*
* Match pipe ID and gate ID
* Output format from ST21NFC_DM_GETINFO is:
* - pipe state (1byte)
* - source hid (1byte)
* - source gid (1byte)
* - destination hid (1byte)
* - destination gid (1byte)
*/
dm_pipe_info = (struct st_nci_pipe_info *)skb_pipe_info->data;
if (dm_pipe_info->dst_gate_id == ST_NCI_APDU_READER_GATE &&
dm_pipe_info->src_host_id == ST_NCI_UICC_HOST_ID) {
pr_err("Unexpected apdu_reader pipe on host %x\n",
dm_pipe_info->src_host_id);
kfree_skb(skb_pipe_info);
continue;
}
for (j = 3; (j < ARRAY_SIZE(st_nci_gates)) &&
(st_nci_gates[j].gate != dm_pipe_info->dst_gate_id); j++)
;
if (j < ARRAY_SIZE(st_nci_gates) &&
st_nci_gates[j].gate == dm_pipe_info->dst_gate_id &&
ST_NCI_DM_IS_PIPE_OPEN(dm_pipe_info->pipe_state)) {
ndev->hci_dev->init_data.gates[j].pipe = pipe_info[2];
ndev->hci_dev->gate2pipe[st_nci_gates[j].gate] =
pipe_info[2];
ndev->hci_dev->pipes[pipe_info[2]].gate =
st_nci_gates[j].gate;
ndev->hci_dev->pipes[pipe_info[2]].host =
dm_pipe_info->src_host_id;
}
kfree_skb(skb_pipe_info);
}
/*
* 3 gates have a well known pipe ID. Only NCI_HCI_LINK_MGMT_GATE
* is not yet open at this stage.
*/
r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
NCI_HCI_LINK_MGMT_GATE,
NCI_HCI_LINK_MGMT_PIPE);
kfree_skb(skb_pipe_list);
return r;
}
EXPORT_SYMBOL_GPL(st_nci_hci_load_session);
static void st_nci_hci_admin_event_received(struct nci_dev *ndev,
u8 event, struct sk_buff *skb)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
switch (event) {
case ST_NCI_EVT_HOT_PLUG:
if (info->se_info.se_active) {
if (!ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(skb)) {
del_timer_sync(&info->se_info.se_active_timer);
info->se_info.se_active = false;
complete(&info->se_info.req_completion);
} else {
mod_timer(&info->se_info.se_active_timer,
jiffies +
msecs_to_jiffies(ST_NCI_SE_TO_PIPES));
}
}
break;
default:
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on admin gate\n");
}
}
static int st_nci_hci_apdu_reader_event_received(struct nci_dev *ndev,
u8 event,
struct sk_buff *skb)
{
int r = 0;
struct st_nci_info *info = nci_get_drvdata(ndev);
pr_debug("apdu reader gate event: %x\n", event);
switch (event) {
case ST_NCI_EVT_TRANSMIT_DATA:
del_timer_sync(&info->se_info.bwi_timer);
info->se_info.bwi_active = false;
info->se_info.cb(info->se_info.cb_context,
skb->data, skb->len, 0);
break;
case ST_NCI_EVT_WTX_REQUEST:
mod_timer(&info->se_info.bwi_timer, jiffies +
msecs_to_jiffies(info->se_info.wt_timeout));
break;
default:
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on apdu reader gate\n");
return 1;
}
kfree_skb(skb);
return r;
}
/*
* Returns:
* <= 0: driver handled the event, skb consumed
* 1: driver does not handle the event, please do standard processing
*/
static int st_nci_hci_connectivity_event_received(struct nci_dev *ndev,
u8 host, u8 event,
struct sk_buff *skb)
{
int r = 0;
struct device *dev = &ndev->nfc_dev->dev;
struct nfc_evt_transaction *transaction;
pr_debug("connectivity gate event: %x\n", event);
switch (event) {
case ST_NCI_EVT_CONNECTIVITY:
r = nfc_se_connectivity(ndev->nfc_dev, host);
break;
case ST_NCI_EVT_TRANSACTION:
/* According to specification etsi 102 622
* 11.2.2.4 EVT_TRANSACTION Table 52
* Description Tag Length
* AID 81 5 to 16
* PARAMETERS 82 0 to 255
*/
if (skb->len < NFC_MIN_AID_LENGTH + 2 &&
skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG)
return -EPROTO;
transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev,
skb->len - 2, GFP_KERNEL);
if (!transaction)
return -ENOMEM;
transaction->aid_len = skb->data[1];
memcpy(transaction->aid, &skb->data[2], transaction->aid_len);
/* Check next byte is PARAMETERS tag (82) */
if (skb->data[transaction->aid_len + 2] !=
NFC_EVT_TRANSACTION_PARAMS_TAG)
return -EPROTO;
transaction->params_len = skb->data[transaction->aid_len + 3];
memcpy(transaction->params, skb->data +
transaction->aid_len + 4, transaction->params_len);
r = nfc_se_transaction(ndev->nfc_dev, host, transaction);
break;
default:
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on connectivity gate\n");
return 1;
}
kfree_skb(skb);
return r;
}
void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
u8 event, struct sk_buff *skb)
{
u8 gate = ndev->hci_dev->pipes[pipe].gate;
u8 host = ndev->hci_dev->pipes[pipe].host;
switch (gate) {
case NCI_HCI_ADMIN_GATE:
st_nci_hci_admin_event_received(ndev, event, skb);
break;
case ST_NCI_APDU_READER_GATE:
st_nci_hci_apdu_reader_event_received(ndev, event, skb);
break;
case ST_NCI_CONNECTIVITY_GATE:
st_nci_hci_connectivity_event_received(ndev, host, event, skb);
break;
}
}
EXPORT_SYMBOL_GPL(st_nci_hci_event_received);
void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
struct sk_buff *skb)
{
struct st_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 != ST_NCI_APDU_READER_GATE &&
ndev->hci_dev->pipes[pipe].host != ST_NCI_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(st_nci_hci_cmd_received);
static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
u8 state)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
int r, i;
struct sk_buff *sk_host_list;
u8 host_id;
switch (se_idx) {
case ST_NCI_UICC_HOST_ID:
ndev->hci_dev->count_pipes = 0;
ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_UICC;
break;
case ST_NCI_ESE_HOST_ID:
ndev->hci_dev->count_pipes = 0;
ndev->hci_dev->expected_pipes = ST_NCI_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, state);
if (r != NCI_STATUS_OK)
return r;
mod_timer(&info->se_info.se_active_timer, jiffies +
msecs_to_jiffies(ST_NCI_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.
*/
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;
pr_debug("st_nci_disable_se\n");
/*
* 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;
pr_debug("st_nci_enable_se\n");
/*
* 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) {
r = -ENOMEM;
goto exit;
}
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);
exit:
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);
pr_debug("st_nci_discover_se\n");
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, &param, 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);
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