2 * NCI based Driver for STMicroelectronics NFC Chip
4 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include <linux/module.h>
20 #include <linux/nfc.h>
21 #include <net/nfc/nci.h>
22 #include <net/nfc/nci_core.h>
26 #define DRIVER_DESC "NCI NFC driver for ST21NFCB"
28 #define ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 0x83
30 static int st21nfcb_nci_open(struct nci_dev *ndev)
32 struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
35 if (test_and_set_bit(ST21NFCB_NCI_RUNNING, &info->flags))
38 r = ndlc_open(info->ndlc);
40 clear_bit(ST21NFCB_NCI_RUNNING, &info->flags);
45 static int st21nfcb_nci_close(struct nci_dev *ndev)
47 struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
49 if (!test_and_clear_bit(ST21NFCB_NCI_RUNNING, &info->flags))
52 ndlc_close(info->ndlc);
57 static int st21nfcb_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
59 struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
61 skb->dev = (void *)ndev;
63 if (!test_bit(ST21NFCB_NCI_RUNNING, &info->flags))
66 return ndlc_send(info->ndlc, skb);
69 static __u32 st21nfcb_nci_get_rfprotocol(struct nci_dev *ndev,
72 return rf_protocol == ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 ?
73 NFC_PROTO_ISO15693_MASK : 0;
76 static struct nci_ops st21nfcb_nci_ops = {
77 .open = st21nfcb_nci_open,
78 .close = st21nfcb_nci_close,
79 .send = st21nfcb_nci_send,
80 .get_rfprotocol = st21nfcb_nci_get_rfprotocol,
83 int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
86 struct st21nfcb_nci_info *info;
90 info = devm_kzalloc(ndlc->dev,
91 sizeof(struct st21nfcb_nci_info), GFP_KERNEL);
95 protocols = NFC_PROTO_JEWEL_MASK
96 | NFC_PROTO_MIFARE_MASK
97 | NFC_PROTO_FELICA_MASK
98 | NFC_PROTO_ISO14443_MASK
99 | NFC_PROTO_ISO14443_B_MASK
100 | NFC_PROTO_ISO15693_MASK
101 | NFC_PROTO_NFC_DEP_MASK;
103 ndlc->ndev = nci_allocate_device(&st21nfcb_nci_ops, protocols,
104 phy_headroom, phy_tailroom);
106 pr_err("Cannot allocate nfc ndev\n");
111 nci_set_drvdata(ndlc->ndev, info);
113 r = nci_register_device(ndlc->ndev);
115 pr_err("Cannot register nfc device to nci core\n");
116 nci_free_device(ndlc->ndev);
121 EXPORT_SYMBOL_GPL(st21nfcb_nci_probe);
123 void st21nfcb_nci_remove(struct nci_dev *ndev)
125 struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
127 nci_unregister_device(ndev);
128 nci_free_device(ndev);
131 EXPORT_SYMBOL_GPL(st21nfcb_nci_remove);
133 MODULE_LICENSE("GPL");
134 MODULE_DESCRIPTION(DRIVER_DESC);