blob: 87b10291b40f4d8b003ae5443d96c9a78d321790 [file] [log] [blame]
Eric Lapuyade8af00d42012-09-13 17:10:48 +02001/*
2 * nop (passthrough) Link Layer Control
3 *
4 * Copyright (C) 2012 Intel Corporation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the
17 * Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21#include <linux/types.h>
Eric Lapuyade8af00d42012-09-13 17:10:48 +020022
23#include "llc.h"
24
25struct llc_nop {
26 struct nfc_hci_dev *hdev;
27 xmit_to_drv_t xmit_to_drv;
28 rcv_to_hci_t rcv_to_hci;
29 int tx_headroom;
30 int tx_tailroom;
31 llc_failure_t llc_failure;
32};
33
34static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
35 rcv_to_hci_t rcv_to_hci, int tx_headroom,
36 int tx_tailroom, int *rx_headroom, int *rx_tailroom,
37 llc_failure_t llc_failure)
38{
39 struct llc_nop *llc_nop;
40
41 *rx_headroom = 0;
42 *rx_tailroom = 0;
43
44 llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL);
45 if (llc_nop == NULL)
46 return NULL;
47
48 llc_nop->hdev = hdev;
49 llc_nop->xmit_to_drv = xmit_to_drv;
50 llc_nop->rcv_to_hci = rcv_to_hci;
51 llc_nop->tx_headroom = tx_headroom;
52 llc_nop->tx_tailroom = tx_tailroom;
53 llc_nop->llc_failure = llc_failure;
54
55 return llc_nop;
56}
57
58static void llc_nop_deinit(struct nfc_llc *llc)
59{
60 kfree(nfc_llc_get_data(llc));
61}
62
63static int llc_nop_start(struct nfc_llc *llc)
64{
65 return 0;
66}
67
68static int llc_nop_stop(struct nfc_llc *llc)
69{
70 return 0;
71}
72
73static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
74{
75 struct llc_nop *llc_nop = nfc_llc_get_data(llc);
76
77 llc_nop->rcv_to_hci(llc_nop->hdev, skb);
78}
79
80static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
81{
82 struct llc_nop *llc_nop = nfc_llc_get_data(llc);
83
84 return llc_nop->xmit_to_drv(llc_nop->hdev, skb);
85}
86
87static struct nfc_llc_ops llc_nop_ops = {
88 .init = llc_nop_init,
89 .deinit = llc_nop_deinit,
90 .start = llc_nop_start,
91 .stop = llc_nop_stop,
92 .rcv_from_drv = llc_nop_rcv_from_drv,
93 .xmit_from_hci = llc_nop_xmit_from_hci,
94};
95
Eric Lapuyadea7d02812012-09-18 19:24:37 +020096int nfc_llc_nop_register(void)
Eric Lapuyade8af00d42012-09-13 17:10:48 +020097{
98 return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops);
99}