130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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* NCI based Driver for STMicroelectronics NFC Chip
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*
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* Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/module.h>
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#include <linux/nfc.h>
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#include <net/nfc/nci.h>
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#include <net/nfc/nci_core.h>
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#include "st21nfcb.h"
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#include "ndlc.h"
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#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
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static int st21nfcb_nci_open(struct nci_dev *ndev)
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{
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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int r;
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if (test_and_set_bit(ST21NFCB_NCI_RUNNING, &info->flags))
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return 0;
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r = ndlc_open(info->ndlc);
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if (r)
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clear_bit(ST21NFCB_NCI_RUNNING, &info->flags);
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return r;
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}
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static int st21nfcb_nci_close(struct nci_dev *ndev)
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{
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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if (!test_and_clear_bit(ST21NFCB_NCI_RUNNING, &info->flags))
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return 0;
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ndlc_close(info->ndlc);
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return 0;
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}
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static int st21nfcb_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
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{
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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skb->dev = (void *)ndev;
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if (!test_bit(ST21NFCB_NCI_RUNNING, &info->flags))
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return -EBUSY;
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return ndlc_send(info->ndlc, skb);
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}
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static struct nci_ops st21nfcb_nci_ops = {
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.open = st21nfcb_nci_open,
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.close = st21nfcb_nci_close,
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.send = st21nfcb_nci_send,
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};
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int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
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int phy_tailroom)
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{
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struct st21nfcb_nci_info *info;
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int r;
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u32 protocols;
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info = devm_kzalloc(ndlc->dev,
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sizeof(struct st21nfcb_nci_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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protocols = NFC_PROTO_JEWEL_MASK
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| NFC_PROTO_MIFARE_MASK
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| NFC_PROTO_FELICA_MASK
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| NFC_PROTO_ISO14443_MASK
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| NFC_PROTO_ISO14443_B_MASK
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| NFC_PROTO_NFC_DEP_MASK;
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ndlc->ndev = nci_allocate_device(&st21nfcb_nci_ops, protocols,
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phy_headroom, phy_tailroom);
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if (!ndlc->ndev) {
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pr_err("Cannot allocate nfc ndev\n");
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r = -ENOMEM;
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goto err_alloc_ndev;
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}
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info->ndlc = ndlc;
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nci_set_drvdata(ndlc->ndev, info);
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r = nci_register_device(ndlc->ndev);
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if (r)
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goto err_regdev;
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return r;
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err_regdev:
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nci_free_device(ndlc->ndev);
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err_alloc_ndev:
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kfree(info);
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return r;
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}
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EXPORT_SYMBOL_GPL(st21nfcb_nci_probe);
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void st21nfcb_nci_remove(struct nci_dev *ndev)
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{
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struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
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nci_unregister_device(ndev);
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nci_free_device(ndev);
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kfree(info);
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}
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EXPORT_SYMBOL_GPL(st21nfcb_nci_remove);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION(DRIVER_DESC);
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