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linux/drivers/nfc/st21nfca/dep.c
Thomas Gleixner 46fe777164 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 399 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 33 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531081038.745679586@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:12 +02:00

681 lines
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C
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
*/
#include <net/nfc/hci.h>
#include "st21nfca.h"
#define ST21NFCA_NFCIP1_INITIATOR 0x00
#define ST21NFCA_NFCIP1_REQ 0xd4
#define ST21NFCA_NFCIP1_RES 0xd5
#define ST21NFCA_NFCIP1_ATR_REQ 0x00
#define ST21NFCA_NFCIP1_ATR_RES 0x01
#define ST21NFCA_NFCIP1_PSL_REQ 0x04
#define ST21NFCA_NFCIP1_PSL_RES 0x05
#define ST21NFCA_NFCIP1_DEP_REQ 0x06
#define ST21NFCA_NFCIP1_DEP_RES 0x07
#define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03)
#define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0)
#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
#define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04)
#define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08)
#define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10
#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
#define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00
#define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40
#define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80
#define ST21NFCA_ATR_REQ_MIN_SIZE 17
#define ST21NFCA_ATR_REQ_MAX_SIZE 65
#define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30
#define ST21NFCA_GB_BIT 0x02
#define ST21NFCA_EVT_SEND_DATA 0x10
#define ST21NFCA_EVT_FIELD_ON 0x11
#define ST21NFCA_EVT_CARD_DEACTIVATED 0x12
#define ST21NFCA_EVT_CARD_ACTIVATED 0x13
#define ST21NFCA_EVT_FIELD_OFF 0x14
#define ST21NFCA_EVT_CARD_F_BITRATE 0x16
#define ST21NFCA_EVT_READER_F_BITRATE 0x13
#define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38)
#define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07)
#define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4)
#define ST21NFCA_CARD_BITRATE_212 0x01
#define ST21NFCA_CARD_BITRATE_424 0x02
#define ST21NFCA_DEFAULT_TIMEOUT 0x0a
#define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \
__LINE__, req)
struct st21nfca_atr_req {
u8 length;
u8 cmd0;
u8 cmd1;
u8 nfcid3[NFC_NFCID3_MAXSIZE];
u8 did;
u8 bsi;
u8 bri;
u8 ppi;
u8 gbi[0];
} __packed;
struct st21nfca_atr_res {
u8 length;
u8 cmd0;
u8 cmd1;
u8 nfcid3[NFC_NFCID3_MAXSIZE];
u8 did;
u8 bsi;
u8 bri;
u8 to;
u8 ppi;
u8 gbi[0];
} __packed;
struct st21nfca_psl_req {
u8 length;
u8 cmd0;
u8 cmd1;
u8 did;
u8 brs;
u8 fsl;
} __packed;
struct st21nfca_psl_res {
u8 length;
u8 cmd0;
u8 cmd1;
u8 did;
} __packed;
struct st21nfca_dep_req_res {
u8 length;
u8 cmd0;
u8 cmd1;
u8 pfb;
u8 did;
u8 nad;
} __packed;
static void st21nfca_tx_work(struct work_struct *work)
{
struct st21nfca_hci_info *info = container_of(work,
struct st21nfca_hci_info,
dep_info.tx_work);
struct nfc_dev *dev;
struct sk_buff *skb;
if (info) {
dev = info->hdev->ndev;
skb = info->dep_info.tx_pending;
device_lock(&dev->dev);
nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE,
ST21NFCA_WR_XCHG_DATA, skb->data, skb->len,
info->async_cb, info);
device_unlock(&dev->dev);
kfree_skb(skb);
}
}
static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info,
struct sk_buff *skb)
{
info->dep_info.tx_pending = skb;
schedule_work(&info->dep_info.tx_work);
}
static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev,
struct st21nfca_atr_req *atr_req)
{
struct st21nfca_atr_res *atr_res;
struct sk_buff *skb;
size_t gb_len;
int r;
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
gb_len = atr_req->length - sizeof(struct st21nfca_atr_req);
skb = alloc_skb(atr_req->length + 1, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_put(skb, sizeof(struct st21nfca_atr_res));
atr_res = (struct st21nfca_atr_res *)skb->data;
memset(atr_res, 0, sizeof(struct st21nfca_atr_res));
atr_res->length = atr_req->length + 1;
atr_res->cmd0 = ST21NFCA_NFCIP1_RES;
atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES;
memcpy(atr_res->nfcid3, atr_req->nfcid3, 6);
atr_res->bsi = 0x00;
atr_res->bri = 0x00;
atr_res->to = ST21NFCA_DEFAULT_TIMEOUT;
atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
if (gb_len) {
skb_put(skb, gb_len);
atr_res->ppi |= ST21NFCA_GB_BIT;
memcpy(atr_res->gbi, atr_req->gbi, gb_len);
r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi,
gb_len);
if (r < 0)
return r;
}
info->dep_info.curr_nfc_dep_pni = 0;
r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
kfree_skb(skb);
return r;
}
static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev,
struct sk_buff *skb)
{
struct st21nfca_atr_req *atr_req;
size_t gb_len;
int r;
skb_trim(skb, skb->len - 1);
if (!skb->len) {
r = -EIO;
goto exit;
}
if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) {
r = -EPROTO;
goto exit;
}
atr_req = (struct st21nfca_atr_req *)skb->data;
if (atr_req->length < sizeof(struct st21nfca_atr_req)) {
r = -EPROTO;
goto exit;
}
r = st21nfca_tm_send_atr_res(hdev, atr_req);
if (r)
goto exit;
gb_len = skb->len - sizeof(struct st21nfca_atr_req);
r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
NFC_COMM_PASSIVE, atr_req->gbi, gb_len);
if (r)
goto exit;
r = 0;
exit:
return r;
}
static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev,
struct st21nfca_psl_req *psl_req)
{
struct st21nfca_psl_res *psl_res;
struct sk_buff *skb;
u8 bitrate[2] = {0, 0};
int r;
skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_put(skb, sizeof(struct st21nfca_psl_res));
psl_res = (struct st21nfca_psl_res *)skb->data;
psl_res->length = sizeof(struct st21nfca_psl_res);
psl_res->cmd0 = ST21NFCA_NFCIP1_RES;
psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES;
psl_res->did = psl_req->did;
r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
if (r < 0)
goto error;
/*
* ST21NFCA only support P2P passive.
* PSL_REQ BRS value != 0 has only a meaning to
* change technology to type F.
* We change to BITRATE 424Kbits.
* In other case switch to BITRATE 106Kbits.
*/
if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) &&
ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) {
bitrate[0] = ST21NFCA_CARD_BITRATE_424;
bitrate[1] = ST21NFCA_CARD_BITRATE_424;
}
/* Send an event to change bitrate change event to card f */
r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2);
error:
kfree_skb(skb);
return r;
}
static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev,
struct sk_buff *skb)
{
struct st21nfca_psl_req *psl_req;
int r;
skb_trim(skb, skb->len - 1);
if (!skb->len) {
r = -EIO;
goto exit;
}
psl_req = (struct st21nfca_psl_req *)skb->data;
if (skb->len < sizeof(struct st21nfca_psl_req)) {
r = -EIO;
goto exit;
}
r = st21nfca_tm_send_psl_res(hdev, psl_req);
exit:
return r;
}
int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
int r;
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
*(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
*(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES;
*(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_RES;
*(u8 *)skb_push(skb, 1) = skb->len;
r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
kfree_skb(skb);
return r;
}
EXPORT_SYMBOL(st21nfca_tm_send_dep_res);
static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev,
struct sk_buff *skb)
{
struct st21nfca_dep_req_res *dep_req;
u8 size;
int r;
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
skb_trim(skb, skb->len - 1);
size = 4;
dep_req = (struct st21nfca_dep_req_res *)skb->data;
if (skb->len < size) {
r = -EIO;
goto exit;
}
if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb))
size++;
if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb))
size++;
if (skb->len < size) {
r = -EIO;
goto exit;
}
/* Receiving DEP_REQ - Decoding */
switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) {
case ST21NFCA_NFC_DEP_PFB_I_PDU:
info->dep_info.curr_nfc_dep_pni =
ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb);
break;
case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
pr_err("Received a ACK/NACK PDU\n");
break;
case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
pr_err("Received a SUPERVISOR PDU\n");
break;
}
skb_pull(skb, size);
return nfc_tm_data_received(hdev->ndev, skb);
exit:
return r;
}
static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev,
struct sk_buff *skb)
{
u8 cmd0, cmd1;
int r;
cmd0 = skb->data[1];
switch (cmd0) {
case ST21NFCA_NFCIP1_REQ:
cmd1 = skb->data[2];
switch (cmd1) {
case ST21NFCA_NFCIP1_ATR_REQ:
r = st21nfca_tm_recv_atr_req(hdev, skb);
break;
case ST21NFCA_NFCIP1_PSL_REQ:
r = st21nfca_tm_recv_psl_req(hdev, skb);
break;
case ST21NFCA_NFCIP1_DEP_REQ:
r = st21nfca_tm_recv_dep_req(hdev, skb);
break;
default:
return 1;
}
break;
default:
return 1;
}
return r;
}
/*
* Returns:
* <= 0: driver handled the event, skb consumed
* 1: driver does not handle the event, please do standard processing
*/
int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
u8 event, struct sk_buff *skb)
{
int r = 0;
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
pr_debug("dep event: %d\n", event);
switch (event) {
case ST21NFCA_EVT_CARD_ACTIVATED:
info->dep_info.curr_nfc_dep_pni = 0;
break;
case ST21NFCA_EVT_CARD_DEACTIVATED:
break;
case ST21NFCA_EVT_FIELD_ON:
break;
case ST21NFCA_EVT_FIELD_OFF:
break;
case ST21NFCA_EVT_SEND_DATA:
r = st21nfca_tm_event_send_data(hdev, skb);
if (r < 0)
return r;
return 0;
default:
nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n");
return 1;
}
kfree_skb(skb);
return r;
}
EXPORT_SYMBOL(st21nfca_dep_event_received);
static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi,
u8 bri, u8 lri)
{
struct sk_buff *skb;
struct st21nfca_psl_req *psl_req;
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
skb =
alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL);
if (!skb)
return;
skb_reserve(skb, 1);
skb_put(skb, sizeof(struct st21nfca_psl_req));
psl_req = (struct st21nfca_psl_req *) skb->data;
psl_req->length = sizeof(struct st21nfca_psl_req);
psl_req->cmd0 = ST21NFCA_NFCIP1_REQ;
psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ;
psl_req->did = did;
psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03);
psl_req->fsl = lri;
*(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10;
st21nfca_im_send_pdu(info, skb);
}
#define ST21NFCA_CB_TYPE_READER_F 1
static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb,
int err)
{
struct st21nfca_hci_info *info = context;
struct st21nfca_atr_res *atr_res;
int r;
if (err != 0)
return;
if (!skb)
return;
switch (info->async_cb_type) {
case ST21NFCA_CB_TYPE_READER_F:
skb_trim(skb, skb->len - 1);
atr_res = (struct st21nfca_atr_res *)skb->data;
r = nfc_set_remote_general_bytes(info->hdev->ndev,
atr_res->gbi,
skb->len - sizeof(struct st21nfca_atr_res));
if (r < 0)
return;
if (atr_res->to >= 0x0e)
info->dep_info.to = 0x0e;
else
info->dep_info.to = atr_res->to + 1;
info->dep_info.to |= 0x10;
r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx,
NFC_COMM_PASSIVE, NFC_RF_INITIATOR);
if (r < 0)
return;
info->dep_info.curr_nfc_dep_pni = 0;
if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri)
st21nfca_im_send_psl_req(info->hdev, atr_res->did,
atr_res->bsi, atr_res->bri,
ST21NFCA_PP2LRI(atr_res->ppi));
break;
default:
kfree_skb(skb);
break;
}
}
int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len)
{
struct sk_buff *skb;
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
struct st21nfca_atr_req *atr_req;
struct nfc_target *target;
uint size;
info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len;
if (size > ST21NFCA_ATR_REQ_MAX_SIZE) {
PROTOCOL_ERR("14.6.1.1");
return -EINVAL;
}
skb =
alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_reserve(skb, 1);
skb_put(skb, sizeof(struct st21nfca_atr_req));
atr_req = (struct st21nfca_atr_req *)skb->data;
memset(atr_req, 0, sizeof(struct st21nfca_atr_req));
atr_req->cmd0 = ST21NFCA_NFCIP1_REQ;
atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ;
memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE);
target = hdev->ndev->targets;
if (target->sensf_res_len > 0)
memcpy(atr_req->nfcid3, target->sensf_res,
target->sensf_res_len);
else
get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE);
atr_req->did = 0x0;
atr_req->bsi = 0x00;
atr_req->bri = 0x00;
atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
if (gb_len) {
atr_req->ppi |= ST21NFCA_GB_BIT;
skb_put_data(skb, gb, gb_len);
}
atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len;
*(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */
info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
info->async_cb_context = info;
info->async_cb = st21nfca_im_recv_atr_res_cb;
info->dep_info.bri = atr_req->bri;
info->dep_info.bsi = atr_req->bsi;
info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi);
return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
ST21NFCA_WR_XCHG_DATA, skb->data,
skb->len, info->async_cb, info);
}
EXPORT_SYMBOL(st21nfca_im_send_atr_req);
static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
int err)
{
struct st21nfca_hci_info *info = context;
struct st21nfca_dep_req_res *dep_res;
int size;
if (err != 0)
return;
if (!skb)
return;
switch (info->async_cb_type) {
case ST21NFCA_CB_TYPE_READER_F:
dep_res = (struct st21nfca_dep_req_res *)skb->data;
size = 3;
if (skb->len < size)
goto exit;
if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb))
size++;
if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb))
size++;
if (skb->len < size)
goto exit;
skb_trim(skb, skb->len - 1);
/* Receiving DEP_REQ - Decoding */
switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) {
case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
pr_err("Received a ACK/NACK PDU\n");
/* fall through */
case ST21NFCA_NFC_DEP_PFB_I_PDU:
info->dep_info.curr_nfc_dep_pni =
ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1);
size++;
skb_pull(skb, size);
nfc_tm_data_received(info->hdev->ndev, skb);
break;
case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
pr_err("Received a SUPERVISOR PDU\n");
skb_pull(skb, size);
*(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
*(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
*(u8 *)skb_push(skb, 1) = skb->len;
*(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10;
st21nfca_im_send_pdu(info, skb);
break;
}
return;
default:
break;
}
exit:
kfree_skb(skb);
}
int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
info->async_cb_context = info;
info->async_cb = st21nfca_im_recv_dep_res_cb;
*(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
*(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
*(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
*(u8 *)skb_push(skb, 1) = skb->len;
*(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10;
return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
ST21NFCA_WR_XCHG_DATA,
skb->data, skb->len,
info->async_cb, info);
}
EXPORT_SYMBOL(st21nfca_im_send_dep_req);
void st21nfca_dep_init(struct nfc_hci_dev *hdev)
{
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work);
info->dep_info.curr_nfc_dep_pni = 0;
info->dep_info.idx = 0;
info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
}
EXPORT_SYMBOL(st21nfca_dep_init);
void st21nfca_dep_deinit(struct nfc_hci_dev *hdev)
{
struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
cancel_work_sync(&info->dep_info.tx_work);
}
EXPORT_SYMBOL(st21nfca_dep_deinit);
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