| 1 | /* |
| 2 | * Atheros AR71xx built-in ethernet mac driver |
| 3 | * Special support for the Atheros ar8216 switch chip |
| 4 | * |
| 5 | * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org> |
| 6 | * |
| 7 | * Based on Atheros' AG7100 driver |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License version 2 as published |
| 11 | * by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include "ag71xx.h" |
| 15 | |
| 16 | #define AR8216_PACKET_TYPE_MASK 0xf |
| 17 | #define AR8216_PACKET_TYPE_NORMAL 0 |
| 18 | |
| 19 | #define AR8216_HEADER_LEN 2 |
| 20 | |
| 21 | void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb) |
| 22 | { |
| 23 | skb_push(skb, AR8216_HEADER_LEN); |
| 24 | skb->data[0] = 0x10; |
| 25 | skb->data[1] = 0x80; |
| 26 | } |
| 27 | |
| 28 | int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb, |
| 29 | int pktlen) |
| 30 | { |
| 31 | u8 type; |
| 32 | |
| 33 | type = skb->data[1] & AR8216_PACKET_TYPE_MASK; |
| 34 | switch (type) { |
| 35 | case AR8216_PACKET_TYPE_NORMAL: |
| 36 | break; |
| 37 | |
| 38 | default: |
| 39 | return -EINVAL; |
| 40 | } |
| 41 | |
| 42 | skb_put(skb, pktlen); |
| 43 | skb_pull(skb, AR8216_HEADER_LEN); |
| 44 | return 0; |
| 45 | } |
| 46 | |
