| Eric Lapuyade | 8af00d4 | 2012-09-13 17:10:48 +0200 | [diff] [blame^] | 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> |
| 22 | #include <linux/export.h> |
| 23 | |
| 24 | #include "llc.h" |
| 25 | |
| 26 | struct llc_nop { |
| 27 | struct nfc_hci_dev *hdev; |
| 28 | xmit_to_drv_t xmit_to_drv; |
| 29 | rcv_to_hci_t rcv_to_hci; |
| 30 | int tx_headroom; |
| 31 | int tx_tailroom; |
| 32 | llc_failure_t llc_failure; |
| 33 | }; |
| 34 | |
| 35 | static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv, |
| 36 | rcv_to_hci_t rcv_to_hci, int tx_headroom, |
| 37 | int tx_tailroom, int *rx_headroom, int *rx_tailroom, |
| 38 | llc_failure_t llc_failure) |
| 39 | { |
| 40 | struct llc_nop *llc_nop; |
| 41 | |
| 42 | *rx_headroom = 0; |
| 43 | *rx_tailroom = 0; |
| 44 | |
| 45 | llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL); |
| 46 | if (llc_nop == NULL) |
| 47 | return NULL; |
| 48 | |
| 49 | llc_nop->hdev = hdev; |
| 50 | llc_nop->xmit_to_drv = xmit_to_drv; |
| 51 | llc_nop->rcv_to_hci = rcv_to_hci; |
| 52 | llc_nop->tx_headroom = tx_headroom; |
| 53 | llc_nop->tx_tailroom = tx_tailroom; |
| 54 | llc_nop->llc_failure = llc_failure; |
| 55 | |
| 56 | return llc_nop; |
| 57 | } |
| 58 | |
| 59 | static void llc_nop_deinit(struct nfc_llc *llc) |
| 60 | { |
| 61 | kfree(nfc_llc_get_data(llc)); |
| 62 | } |
| 63 | |
| 64 | static int llc_nop_start(struct nfc_llc *llc) |
| 65 | { |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static int llc_nop_stop(struct nfc_llc *llc) |
| 70 | { |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) |
| 75 | { |
| 76 | struct llc_nop *llc_nop = nfc_llc_get_data(llc); |
| 77 | |
| 78 | llc_nop->rcv_to_hci(llc_nop->hdev, skb); |
| 79 | } |
| 80 | |
| 81 | static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) |
| 82 | { |
| 83 | struct llc_nop *llc_nop = nfc_llc_get_data(llc); |
| 84 | |
| 85 | return llc_nop->xmit_to_drv(llc_nop->hdev, skb); |
| 86 | } |
| 87 | |
| 88 | static struct nfc_llc_ops llc_nop_ops = { |
| 89 | .init = llc_nop_init, |
| 90 | .deinit = llc_nop_deinit, |
| 91 | .start = llc_nop_start, |
| 92 | .stop = llc_nop_stop, |
| 93 | .rcv_from_drv = llc_nop_rcv_from_drv, |
| 94 | .xmit_from_hci = llc_nop_xmit_from_hci, |
| 95 | }; |
| 96 | |
| 97 | int nfc_llc_nop_register() |
| 98 | { |
| 99 | return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops); |
| 100 | } |
| 101 | EXPORT_SYMBOL(nfc_llc_nop_register); |