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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 | |
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> | |
8af00d48 EL |
22 | |
23 | #include "llc.h" | |
24 | ||
25 | struct 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 | ||
34 | static 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 | ||
58 | static void llc_nop_deinit(struct nfc_llc *llc) | |
59 | { | |
60 | kfree(nfc_llc_get_data(llc)); | |
61 | } | |
62 | ||
63 | static int llc_nop_start(struct nfc_llc *llc) | |
64 | { | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int llc_nop_stop(struct nfc_llc *llc) | |
69 | { | |
70 | return 0; | |
71 | } | |
72 | ||
73 | static 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 | ||
80 | static 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 | ||
87 | static 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 | ||
96 | int nfc_llc_nop_register() | |
97 | { | |
98 | return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops); | |
99 | } |