drivers/nfc/st-nci/ndlc.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * NCI based Driver for STMicroelectronics NFC Chip
   4  *
   5  * Copyright (C) 2014-2015  STMicroelectronics SAS. All rights reserved.
   6  */
   7
   8 #ifndef __LOCAL_NDLC_H_
   9 #define __LOCAL_NDLC_H_
  10
  11 #include <linux/skbuff.h>
  12 #include <net/nfc/nfc.h>
  13
  14 struct st_nci_se_status;
  15
  16 /* Low Level Transport description */
  17 struct llt_ndlc {
  18         struct nci_dev *ndev;
  19         const struct nfc_phy_ops *ops;
  20         void *phy_id;
  21
  22         struct timer_list t1_timer;
  23         bool t1_active;
  24
  25         struct timer_list t2_timer;
  26         bool t2_active;
  27
  28         struct sk_buff_head rcv_q;
  29         struct sk_buff_head send_q;
  30         struct sk_buff_head ack_pending_q;
  31
  32         struct work_struct sm_work;
  33
  34         struct device *dev;
  35
  36         /*
  37          * < 0 if hardware error occurred
  38          * and prevents normal operation.
  39          */
  40         int hard_fault;
  41         int powered;
  42 };
  43
  44 int ndlc_open(struct llt_ndlc *ndlc);
  45 void ndlc_close(struct llt_ndlc *ndlc);
  46 int ndlc_send(struct llt_ndlc *ndlc, struct sk_buff *skb);
  47 void ndlc_recv(struct llt_ndlc *ndlc, struct sk_buff *skb);
  48 int ndlc_probe(void *phy_id, const struct nfc_phy_ops *phy_ops,
  49                struct device *dev, int phy_headroom, int phy_tailroom,
  50                struct llt_ndlc **ndlc_id, struct st_nci_se_status *se_status);
  51 void ndlc_remove(struct llt_ndlc *ndlc);
  52 #endif /* __LOCAL_NDLC_H__ */