108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
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* Copyright (C) 2012 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __NFC_SHDLC_H
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#define __NFC_SHDLC_H
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struct nfc_shdlc;
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struct nfc_shdlc_ops {
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int (*open) (struct nfc_shdlc *shdlc);
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void (*close) (struct nfc_shdlc *shdlc);
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int (*hci_ready) (struct nfc_shdlc *shdlc);
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int (*xmit) (struct nfc_shdlc *shdlc, struct sk_buff *skb);
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int (*start_poll) (struct nfc_shdlc *shdlc,
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u32 im_protocols, u32 tm_protocols);
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int (*target_from_gate) (struct nfc_shdlc *shdlc, u8 gate,
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struct nfc_target *target);
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int (*complete_target_discovered) (struct nfc_shdlc *shdlc, u8 gate,
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struct nfc_target *target);
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int (*data_exchange) (struct nfc_shdlc *shdlc,
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struct nfc_target *target,
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struct sk_buff *skb, struct sk_buff **res_skb);
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int (*check_presence)(struct nfc_shdlc *shdlc,
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struct nfc_target *target);
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};
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enum shdlc_state {
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SHDLC_DISCONNECTED = 0,
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SHDLC_CONNECTING = 1,
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SHDLC_NEGOCIATING = 2,
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SHDLC_CONNECTED = 3
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};
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struct nfc_shdlc {
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struct mutex state_mutex;
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enum shdlc_state state;
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int hard_fault;
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struct nfc_hci_dev *hdev;
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wait_queue_head_t *connect_wq;
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int connect_tries;
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int connect_result;
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struct timer_list connect_timer;/* aka T3 in spec 10.6.1 */
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u8 w; /* window size */
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bool srej_support;
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struct timer_list t1_timer; /* send ack timeout */
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bool t1_active;
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struct timer_list t2_timer; /* guard/retransmit timeout */
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bool t2_active;
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int ns; /* next seq num for send */
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int nr; /* next expected seq num for receive */
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int dnr; /* oldest sent unacked seq num */
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struct sk_buff_head rcv_q;
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struct sk_buff_head send_q;
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bool rnr; /* other side is not ready to receive */
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struct sk_buff_head ack_pending_q;
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struct workqueue_struct *sm_wq;
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struct work_struct sm_work;
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struct nfc_shdlc_ops *ops;
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int client_headroom;
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int client_tailroom;
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void *clientdata;
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};
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void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb);
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struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops,
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struct nfc_hci_init_data *init_data,
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u32 protocols,
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int tx_headroom, int tx_tailroom,
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int max_link_payload, const char *devname);
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void nfc_shdlc_free(struct nfc_shdlc *shdlc);
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void nfc_shdlc_set_clientdata(struct nfc_shdlc *shdlc, void *clientdata);
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void *nfc_shdlc_get_clientdata(struct nfc_shdlc *shdlc);
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struct nfc_hci_dev *nfc_shdlc_get_hci_dev(struct nfc_shdlc *shdlc);
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#endif /* __NFC_SHDLC_H */
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