forked from Minki/linux
9e87f9a9c4
In NFC Forum NCI specification, some RF Protocol values are reserved for proprietary use (from 0x80 to 0xfe). Some CLF vendor may need to use one value within this range for specific technology. Furthermore, some CLF may not becompliant with NFC Froum NCI specification 2.0 and therefore will not support RF Protocol value 0x06 for PROTOCOL_T5T as mention in a draft specification and in a recent push. Adding get_rf_protocol handle to the nci_ops structure will help to set the correct technology to target. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
134 lines
3.2 KiB
C
134 lines
3.2 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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#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
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#define ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 0x83
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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 __u32 st21nfcb_nci_get_rfprotocol(struct nci_dev *ndev,
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__u8 rf_protocol)
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{
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return rf_protocol == ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 ?
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NFC_PROTO_ISO15693_MASK : 0;
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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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.get_rfprotocol = st21nfcb_nci_get_rfprotocol,
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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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return -ENOMEM;
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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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pr_err("Cannot register nfc device to nci core\n");
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nci_free_device(ndlc->ndev);
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}
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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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