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 21void 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 28int 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_pull(skb, AR8216_HEADER_LEN); 43 return 0; 44} 45