static struct pbuf *liteeth_low_level_input(struct netif *netif)
{
unsigned int rxslot;
unsigned int rxlen;
char *rxbuffer;
struct pbuf *p, *q;
p = NULL;
if(ethmac_sram_writer_ev_pending_read() & ETHMAC_EV_SRAM_WRITER) {
rxslot = ethmac_sram_writer_slot_read();
rxlen = ethmac_sram_writer_length_read();
/* dest MAC + source MAC + 802.1Q + ethertype + payload (MTU) */
if(rxlen <= (netif->mtu + 18)) {
if(rxslot)
rxbuffer = rxbuffer1;
else
rxbuffer = rxbuffer0;
p = pbuf_alloc(PBUF_RAW, rxlen, PBUF_POOL);
q = p;
while(q) {
memcpy(q->payload, rxbuffer, q->len);
rxbuffer += q->len;
if(q->tot_len != q->len)
q = q->next;
else
q = NULL;
}
}
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
}
return p;
}
err_t liteeth_init(struct netif *netif)
{
int i;
netif->hwaddr_len = 6;
for(i=0;i<netif->hwaddr_len;i++)
netif->hwaddr[i] = macadr[i];
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
netif->output = etharp_output;
netif->linkoutput = liteeth_low_level_output;
netif->mtu = 1500;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
ethmac_sram_reader_ev_pending_write(ETHMAC_EV_SRAM_READER);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
rxbuffer0 = (char *)ETHMAC_RX0_BASE;
rxbuffer1 = (char *)ETHMAC_RX1_BASE;
txbuffer0 = (char *)ETHMAC_TX0_BASE;
txbuffer1 = (char *)ETHMAC_TX1_BASE;
txslot = 0;
txbuffer = txbuffer0;
return ERR_OK;
}
static void lwip_service(void)
{
sys_check_timeouts();
if(ethmac_sram_writer_ev_pending_read() & ETHMAC_EV_SRAM_WRITER) {
liteeth_input(&netif);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
}
}
static void liteeth_low_level_init(struct netif *netif)
{
int i;
netif->hwaddr_len = 6;
for(i=0;i<netif->hwaddr_len;i++)
netif->hwaddr[i] = macadr[i];
netif->mtu = 1514;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
ethmac_sram_reader_ev_pending_write(ETHMAC_EV_SRAM_READER);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
rxbuffer0 = (char *)ETHMAC_RX0_BASE;
rxbuffer1 = (char *)ETHMAC_RX1_BASE;
txbuffer0 = (char *)ETHMAC_TX0_BASE;
txbuffer1 = (char *)ETHMAC_TX1_BASE;
rxslot = 0;
txslot = 0;
rxbuffer = rxbuffer0;
txbuffer = txbuffer0;
}
static void misoc_net_receive(FAR struct misoc_net_driver_s *priv)
{
uint8_t rxslot;
uint32_t rxlen;
do
{
/* Check for errors and update statistics */
/* Check if the packet is a valid size for the network buffer
* configuration.
*/
/* Find rx slot */
rxslot = ethmac_sram_writer_slot_read();
/* Get rx len */
rxlen = ethmac_sram_writer_length_read();
/* Copy the data data from the hardware to priv->misoc_net_dev.d_buf. Set
* amount of data in priv->misoc_net_dev.d_len
*
* NOTE: These memcpy's could be avoided by simply setting the d_buf
* pointer to the rx*_buf containing the received data. Some additional
* buffer management logic would also be required.
*/
misoc_flush_dcache();
if (rxslot)
{
memcpy(priv->misoc_net_dev.d_buf, priv->rx1_buf, rxlen);
}
else
{
memcpy(priv->misoc_net_dev.d_buf, priv->rx0_buf, rxlen);
}
/* Clear event pending */
ethmac_sram_writer_ev_pending_write(1);
priv->misoc_net_dev.d_len = rxlen;
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the packet tap */
pkt_input(&priv->misoc_net_dev);
#endif
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv4
if (BUF->type == HTONS(ETHTYPE_IP))
{
ninfo("IPv4 frame\n");
NETDEV_RXIPV4(&priv->misoc_net_dev);
/* Handle ARP on input then give the IPv4 packet to the network
* layer
*/
arp_ipin(&priv->misoc_net_dev);
ipv4_input(&priv->misoc_net_dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, the field d_len will set to a value > 0.
*/
if (priv->misoc_net_dev.d_len > 0)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv6
if (IFF_IS_IPv4(priv->misoc_net_dev.d_flags))
#endif
{
arp_out(&priv->misoc_net_dev);
}
#ifdef CONFIG_NET_IPv6
else
{
neighbor_out(&kel->misoc_net_dev);
}
#endif
/* And send the packet */
misoc_net_transmit(priv);
}
}
else
#endif
#ifdef CONFIG_NET_IPv6
if (BUF->type == HTONS(ETHTYPE_IP6))
{
ninfo("Iv6 frame\n");
NETDEV_RXIPV6(&priv->misoc_net_dev);
/* Give the IPv6 packet to the network layer */
ipv6_input(&priv->misoc_net_dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, the field d_len will set to a value > 0.
*/
if (priv->misoc_net_dev.d_len > 0)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv4
if (IFF_IS_IPv4(priv->misoc_net_dev.d_flags))
{
arp_out(&priv->misoc_net_dev);
}
else
#endif
#ifdef CONFIG_NET_IPv6
{
neighbor_out(&priv->misoc_net_dev);
}
#endif
/* And send the packet */
misoc_net_transmit(priv);
}
}
else
#endif
#ifdef CONFIG_NET_ARP
if (BUF->type == htons(ETHTYPE_ARP))
{
arp_arpin(&priv->misoc_net_dev);
NETDEV_RXARP(&priv->misoc_net_dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, the field d_len will set to a value > 0.
*/
if (priv->misoc_net_dev.d_len > 0)
{
misoc_net_transmit(priv);
}
}
#endif
else
{
NETDEV_RXDROPPED(&priv->misoc_net_dev);
}
}
while (ethmac_sram_writer_ev_pending_read() & ETHMAC_EV_SRAM_WRITER);
}
int misoc_net_initialize(int intf)
{
FAR struct misoc_net_driver_s *priv;
/* Get the interface structure associated with this interface number. */
DEBUGASSERT(intf < CONFIG_MISOC_NET_NINTERFACES);
priv = &g_misoc_net[intf];
/* Check if a Ethernet chip is recognized at its I/O base */
/* Attach the IRQ to the driver */
if (irq_attach(ETHMAC_INTERRUPT, misoc_net_interrupt, NULL))
{
/* We could not attach the ISR to the interrupt */
return -EAGAIN;
}
/* clear pending int */
ethmac_sram_writer_ev_pending_write(1);
ethmac_sram_reader_ev_pending_write(1);
/* Initialize the driver structure */
memset(priv, 0, sizeof(struct misoc_net_driver_s));
priv->rx0_buf = (uint8_t *)ETHMAC_RX0_BASE;
priv->rx1_buf = (uint8_t *)ETHMAC_RX1_BASE;
priv->tx0_buf = (uint8_t *)ETHMAC_TX0_BASE;
priv->tx1_buf = (uint8_t *)ETHMAC_TX1_BASE;
priv->tx_buf = priv->tx0_buf;
priv->tx_slot=0;
priv->misoc_net_dev.d_buf = g_pktbuf; /* Single packet buffer */
priv->misoc_net_dev.d_ifup = misoc_net_ifup; /* I/F up (new IP address) callback */
priv->misoc_net_dev.d_ifdown = misoc_net_ifdown; /* I/F down callback */
priv->misoc_net_dev.d_txavail = misoc_net_txavail; /* New TX data callback */
#ifdef CONFIG_NET_IGMP
priv->misoc_net_dev.d_addmac = misoc_net_addmac; /* Add multicast MAC address */
priv->misoc_net_dev.d_rmmac = misoc_net_rmmac; /* Remove multicast MAC address */
#endif
priv->misoc_net_dev.d_private = (FAR void *)g_misoc_net; /* Used to recover private state from dev */
/* Create a watchdog for timing polling for and timing of transmissions */
priv->misoc_net_txpoll = wd_create(); /* Create periodic poll timer */
priv->misoc_net_txtimeout = wd_create(); /* Create TX timeout timer */
/* Put the interface in the down state. This usually amounts to resetting
* the device and/or calling misoc_net_ifdown().
*/
/* Read the MAC address from the hardware into
* priv->misoc_net_dev.d_mac.ether.ether_addr_octet
*/
/* Register the device with the OS so that socket IOCTLs can be performed */
(void)netdev_register(&priv->misoc_net_dev, NET_LL_ETHERNET);
return OK;
}
