941ec5c6b0
Add support for ISO/IEC 15693 RF technology and Type 5 tags. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/*
|
|
* 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);
|