| Eric Lapuyade | eb738fe | 2012-04-10 19:43:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the |
| 16 | * Free Software Foundation, Inc., |
| 17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #ifndef __NFC_SHDLC_H |
| 21 | #define __NFC_SHDLC_H |
| 22 | |
| 23 | struct nfc_shdlc; |
| 24 | |
| 25 | struct nfc_shdlc_ops { |
| 26 | int (*open) (struct nfc_shdlc *shdlc); |
| 27 | void (*close) (struct nfc_shdlc *shdlc); |
| 28 | int (*hci_ready) (struct nfc_shdlc *shdlc); |
| 29 | int (*xmit) (struct nfc_shdlc *shdlc, struct sk_buff *skb); |
| 30 | int (*start_poll) (struct nfc_shdlc *shdlc, u32 protocols); |
| 31 | int (*target_from_gate) (struct nfc_shdlc *shdlc, u8 gate, |
| 32 | struct nfc_target *target); |
| 33 | int (*complete_target_discovered) (struct nfc_shdlc *shdlc, u8 gate, |
| 34 | struct nfc_target *target); |
| 35 | int (*data_exchange) (struct nfc_shdlc *shdlc, |
| 36 | struct nfc_target *target, |
| 37 | struct sk_buff *skb, struct sk_buff **res_skb); |
| Eric Lapuyade | 1676f75 | 2012-05-07 12:31:16 +0200 | [diff] [blame] | 38 | int (*check_presence)(struct nfc_shdlc *shdlc, |
| 39 | struct nfc_target *target); |
| Eric Lapuyade | eb738fe | 2012-04-10 19:43:07 +0200 | [diff] [blame] | 40 | }; |
| 41 | |
| 42 | enum shdlc_state { |
| 43 | SHDLC_DISCONNECTED = 0, |
| 44 | SHDLC_CONNECTING = 1, |
| 45 | SHDLC_NEGOCIATING = 2, |
| 46 | SHDLC_CONNECTED = 3 |
| 47 | }; |
| 48 | |
| 49 | struct nfc_shdlc { |
| 50 | struct mutex state_mutex; |
| 51 | enum shdlc_state state; |
| 52 | int hard_fault; |
| 53 | |
| 54 | struct nfc_hci_dev *hdev; |
| 55 | |
| 56 | wait_queue_head_t *connect_wq; |
| 57 | int connect_tries; |
| 58 | int connect_result; |
| 59 | struct timer_list connect_timer;/* aka T3 in spec 10.6.1 */ |
| 60 | |
| 61 | u8 w; /* window size */ |
| 62 | bool srej_support; |
| 63 | |
| 64 | struct timer_list t1_timer; /* send ack timeout */ |
| 65 | bool t1_active; |
| 66 | |
| 67 | struct timer_list t2_timer; /* guard/retransmit timeout */ |
| 68 | bool t2_active; |
| 69 | |
| 70 | int ns; /* next seq num for send */ |
| 71 | int nr; /* next expected seq num for receive */ |
| 72 | int dnr; /* oldest sent unacked seq num */ |
| 73 | |
| 74 | struct sk_buff_head rcv_q; |
| 75 | |
| 76 | struct sk_buff_head send_q; |
| 77 | bool rnr; /* other side is not ready to receive */ |
| 78 | |
| 79 | struct sk_buff_head ack_pending_q; |
| 80 | |
| 81 | struct workqueue_struct *sm_wq; |
| 82 | struct work_struct sm_work; |
| 83 | |
| 84 | struct nfc_shdlc_ops *ops; |
| 85 | |
| 86 | int client_headroom; |
| 87 | int client_tailroom; |
| 88 | |
| 89 | void *clientdata; |
| 90 | }; |
| 91 | |
| 92 | void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb); |
| 93 | |
| 94 | struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops, |
| 95 | struct nfc_hci_init_data *init_data, |
| 96 | u32 protocols, |
| 97 | int tx_headroom, int tx_tailroom, |
| 98 | int max_link_payload, const char *devname); |
| 99 | |
| 100 | void nfc_shdlc_free(struct nfc_shdlc *shdlc); |
| 101 | |
| 102 | void nfc_shdlc_set_clientdata(struct nfc_shdlc *shdlc, void *clientdata); |
| 103 | void *nfc_shdlc_get_clientdata(struct nfc_shdlc *shdlc); |
| 104 | struct nfc_hci_dev *nfc_shdlc_get_hci_dev(struct nfc_shdlc *shdlc); |
| 105 | |
| 106 | #endif /* __NFC_SHDLC_H */ |