122 lines
2.5 KiB
C
122 lines
2.5 KiB
C
/*
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* tap.c - A tap ethernet driver for barebox
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <driver.h>
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#include <malloc.h>
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#include <net.h>
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#include <init.h>
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#include <mach/linux.h>
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struct tap_priv {
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int fd;
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char *name;
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};
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int tap_eth_send (struct eth_device *edev, void *packet, int length)
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{
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struct tap_priv *priv = edev->priv;
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linux_write(priv->fd, packet, length);
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return 0;
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}
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int tap_eth_rx (struct eth_device *edev)
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{
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struct tap_priv *priv = edev->priv;
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int length;
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length = linux_read_nonblock(priv->fd, NetRxPackets[0], PKTSIZE);
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if (length > 0)
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net_receive(NetRxPackets[0], length);
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return 0;
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}
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int tap_eth_open(struct eth_device *edev)
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{
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return 0;
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}
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void tap_eth_halt (struct eth_device *edev)
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{
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/* nothing to do here */
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}
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static int tap_get_ethaddr(struct eth_device *edev, unsigned char *adr)
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{
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return -1;
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}
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static int tap_set_ethaddr(struct eth_device *edev, unsigned char *adr)
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{
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return 0;
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}
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int tap_probe(struct device_d *dev)
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{
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struct eth_device *edev;
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struct tap_priv *priv;
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int ret = 0;
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priv = xmalloc(sizeof(struct tap_priv));
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priv->name = "barebox";
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priv->fd = tap_alloc(priv->name);
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if (priv->fd < 0) {
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ret = priv->fd;
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goto out;
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}
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edev = xmalloc(sizeof(struct eth_device));
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edev->priv = priv;
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edev->init = tap_eth_open;
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edev->open = tap_eth_open;
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edev->send = tap_eth_send;
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edev->recv = tap_eth_rx;
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edev->halt = tap_eth_halt;
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edev->get_ethaddr = tap_get_ethaddr;
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edev->set_ethaddr = tap_set_ethaddr;
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eth_register(edev);
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return 0;
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out:
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free(priv);
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return ret;
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}
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static struct driver_d tap_driver = {
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.name = "tap",
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.probe = tap_probe,
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};
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static int tap_init(void)
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{
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register_driver(&tap_driver);
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return 0;
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}
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device_initcall(tap_init);
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