OpenWrt – Rev 4

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/*
 *  Atheros AR71xx built-in ethernet mac driver
 *  Special support for the Atheros ar8216 switch chip
 *
 *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
 *
 *  Based on Atheros' AG7100 driver
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License version 2 as published
 *  by the Free Software Foundation.
 */

#include "ag71xx.h"

#define AR8216_PACKET_TYPE_MASK         0xf
#define AR8216_PACKET_TYPE_NORMAL       0

#define AR8216_HEADER_LEN       2

void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb)
{
        skb_push(skb, AR8216_HEADER_LEN);
        skb->data[0] = 0x10;
        skb->data[1] = 0x80;
}

int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb,
                                int pktlen)
{
        u8 type;

        type = skb->data[1] & AR8216_PACKET_TYPE_MASK;
        switch (type) {
        case AR8216_PACKET_TYPE_NORMAL:
                break;

        default:
                return -EINVAL;
        }

        skb_pull(skb, AR8216_HEADER_LEN);
        return 0;
}