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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4294e32040
On st21nfcb the irq line might be kept to active state because of other interfaces activity. This may generate i2c read tentative resulting in i2c NACK. This fix will currently let NDLC upper layer to decide when it is relevent to signal to the physical layer when the chip as muted. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
60 lines
1.7 KiB
C
60 lines
1.7 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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#ifndef __LOCAL_NDLC_H_
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#define __LOCAL_NDLC_H_
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#include <linux/skbuff.h>
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#include <net/nfc/nfc.h>
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/* Low Level Transport description */
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struct llt_ndlc {
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struct nci_dev *ndev;
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struct nfc_phy_ops *ops;
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void *phy_id;
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struct timer_list t1_timer;
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bool t1_active;
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struct timer_list t2_timer;
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bool t2_active;
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struct sk_buff_head rcv_q;
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struct sk_buff_head send_q;
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struct sk_buff_head ack_pending_q;
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struct work_struct sm_work;
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struct device *dev;
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/*
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* < 0 if hardware error occured
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* and prevents normal operation.
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*/
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int hard_fault;
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};
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int ndlc_open(struct llt_ndlc *ndlc);
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void ndlc_close(struct llt_ndlc *ndlc);
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int ndlc_send(struct llt_ndlc *ndlc, struct sk_buff *skb);
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void ndlc_recv(struct llt_ndlc *ndlc, struct sk_buff *skb);
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int ndlc_probe(void *phy_id, struct nfc_phy_ops *phy_ops, struct device *dev,
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int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id);
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void ndlc_remove(struct llt_ndlc *ndlc);
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#endif /* __LOCAL_NDLC_H__ */
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