Commit | Line | Data |
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8af00d48 EL |
1 | /* |
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 | |
98b32dec | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
8af00d48 EL |
17 | */ |
18 | ||
19 | #include <linux/types.h> | |
8af00d48 EL |
20 | |
21 | #include "llc.h" | |
22 | ||
23 | struct llc_nop { | |
24 | struct nfc_hci_dev *hdev; | |
25 | xmit_to_drv_t xmit_to_drv; | |
26 | rcv_to_hci_t rcv_to_hci; | |
27 | int tx_headroom; | |
28 | int tx_tailroom; | |
29 | llc_failure_t llc_failure; | |
30 | }; | |
31 | ||
32 | static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv, | |
33 | rcv_to_hci_t rcv_to_hci, int tx_headroom, | |
34 | int tx_tailroom, int *rx_headroom, int *rx_tailroom, | |
35 | llc_failure_t llc_failure) | |
36 | { | |
37 | struct llc_nop *llc_nop; | |
38 | ||
39 | *rx_headroom = 0; | |
40 | *rx_tailroom = 0; | |
41 | ||
42 | llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL); | |
43 | if (llc_nop == NULL) | |
44 | return NULL; | |
45 | ||
46 | llc_nop->hdev = hdev; | |
47 | llc_nop->xmit_to_drv = xmit_to_drv; | |
48 | llc_nop->rcv_to_hci = rcv_to_hci; | |
49 | llc_nop->tx_headroom = tx_headroom; | |
50 | llc_nop->tx_tailroom = tx_tailroom; | |
51 | llc_nop->llc_failure = llc_failure; | |
52 | ||
53 | return llc_nop; | |
54 | } | |
55 | ||
56 | static void llc_nop_deinit(struct nfc_llc *llc) | |
57 | { | |
58 | kfree(nfc_llc_get_data(llc)); | |
59 | } | |
60 | ||
61 | static int llc_nop_start(struct nfc_llc *llc) | |
62 | { | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int llc_nop_stop(struct nfc_llc *llc) | |
67 | { | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) | |
72 | { | |
73 | struct llc_nop *llc_nop = nfc_llc_get_data(llc); | |
74 | ||
75 | llc_nop->rcv_to_hci(llc_nop->hdev, skb); | |
76 | } | |
77 | ||
78 | static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) | |
79 | { | |
80 | struct llc_nop *llc_nop = nfc_llc_get_data(llc); | |
81 | ||
82 | return llc_nop->xmit_to_drv(llc_nop->hdev, skb); | |
83 | } | |
84 | ||
85 | static struct nfc_llc_ops llc_nop_ops = { | |
86 | .init = llc_nop_init, | |
87 | .deinit = llc_nop_deinit, | |
88 | .start = llc_nop_start, | |
89 | .stop = llc_nop_stop, | |
90 | .rcv_from_drv = llc_nop_rcv_from_drv, | |
91 | .xmit_from_hci = llc_nop_xmit_from_hci, | |
92 | }; | |
93 | ||
a7d0281b | 94 | int nfc_llc_nop_register(void) |
8af00d48 EL |
95 | { |
96 | return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops); | |
97 | } |