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// SPDX-License-Identifier: GPL-2.0-only
/*
* tap.c - A tap ethernet driver for barebox
*
* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*/
#include <common.h>
#include <driver.h>
#include <malloc.h>
#include <net.h>
#include <init.h>
#include <mach/linux.h>
struct tap_priv {
int fd;
char *name;
char *rx_buf;
};
static int tap_eth_send(struct eth_device *edev, void *packet, int length)
{
struct tap_priv *priv = edev->priv;
linux_write(priv->fd, packet, length);
return 0;
}
static int tap_eth_rx(struct eth_device *edev)
{
struct tap_priv *priv = edev->priv;
int length;
length = linux_read_nonblock(priv->fd, priv->rx_buf, PKTSIZE);
if (length > 0)
net_receive(edev, priv->rx_buf, length);
return 0;
}
static int tap_eth_open(struct eth_device *edev)
{
return 0;
}
static void tap_eth_halt(struct eth_device *edev)
{
/* nothing to do here */
}
static int tap_get_ethaddr(struct eth_device *edev, unsigned char *adr)
{
return -1;
}
static int tap_set_ethaddr(struct eth_device *edev, const unsigned char *adr)
{
return 0;
}
static int tap_probe(struct device_d *dev)
{
struct eth_device *edev;
struct tap_priv *priv;
int ret = 0;
priv = xzalloc(sizeof(struct tap_priv));
priv->name = "barebox";
priv->fd = tap_alloc(priv->name);
if (priv->fd < 0) {
ret = priv->fd;
goto out;
}
priv->rx_buf = xmalloc(PKTSIZE);
edev = xzalloc(sizeof(struct eth_device));
edev->priv = priv;
edev->parent = dev;
edev->init = tap_eth_open;
edev->open = tap_eth_open;
edev->send = tap_eth_send;
edev->recv = tap_eth_rx;
edev->halt = tap_eth_halt;
edev->get_ethaddr = tap_get_ethaddr;
edev->set_ethaddr = tap_set_ethaddr;
eth_register(edev);
return 0;
out:
free(priv);
return ret;
}
static struct driver_d tap_driver = {
.name = "tap",
.probe = tap_probe,
};
device_platform_driver(tap_driver);
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