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/*
* 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/>.
*/
#include <linux/module.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
#include "st21nfcb.h"
#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
#define ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 0x83
static int st21nfcb_nci_open(struct nci_dev *ndev)
{
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
int r;
if (test_and_set_bit(ST21NFCB_NCI_RUNNING, &info->flags))
return 0;
r = ndlc_open(info->ndlc);
if (r)
clear_bit(ST21NFCB_NCI_RUNNING, &info->flags);
return r;
}
static int st21nfcb_nci_close(struct nci_dev *ndev)
{
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
if (!test_and_clear_bit(ST21NFCB_NCI_RUNNING, &info->flags))
return 0;
ndlc_close(info->ndlc);
return 0;
}
static int st21nfcb_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
{
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
skb->dev = (void *)ndev;
if (!test_bit(ST21NFCB_NCI_RUNNING, &info->flags))
return -EBUSY;
return ndlc_send(info->ndlc, skb);
}
static __u32 st21nfcb_nci_get_rfprotocol(struct nci_dev *ndev,
__u8 rf_protocol)
{
return rf_protocol == ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 ?
NFC_PROTO_ISO15693_MASK : 0;
}
static struct nci_ops st21nfcb_nci_ops = {
.open = st21nfcb_nci_open,
.close = st21nfcb_nci_close,
.send = st21nfcb_nci_send,
.get_rfprotocol = st21nfcb_nci_get_rfprotocol,
};
int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
int phy_tailroom)
{
struct st21nfcb_nci_info *info;
int r;
u32 protocols;
info = devm_kzalloc(ndlc->dev,
sizeof(struct st21nfcb_nci_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
protocols = NFC_PROTO_JEWEL_MASK
| NFC_PROTO_MIFARE_MASK
| NFC_PROTO_FELICA_MASK
| NFC_PROTO_ISO14443_MASK
| NFC_PROTO_ISO14443_B_MASK
| NFC_PROTO_ISO15693_MASK
| NFC_PROTO_NFC_DEP_MASK;
ndlc->ndev = nci_allocate_device(&st21nfcb_nci_ops, protocols,
phy_headroom, phy_tailroom);
if (!ndlc->ndev) {
pr_err("Cannot allocate nfc ndev\n");
return -ENOMEM;
}
info->ndlc = ndlc;
nci_set_drvdata(ndlc->ndev, info);
r = nci_register_device(ndlc->ndev);
if (r) {
pr_err("Cannot register nfc device to nci core\n");
nci_free_device(ndlc->ndev);
}
return r;
}
EXPORT_SYMBOL_GPL(st21nfcb_nci_probe);
void st21nfcb_nci_remove(struct nci_dev *ndev)
{
struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
nci_unregister_device(ndev);
nci_free_device(ndev);
kfree(info);
}
EXPORT_SYMBOL_GPL(st21nfcb_nci_remove);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(DRIVER_DESC);
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