mirror of
https://github.com/m-labs/artiq.git
synced 2024-12-19 00:16:29 +08:00
144 lines
3.1 KiB
C
144 lines
3.1 KiB
C
// This file is Copyright (c) 2015 Florent Kermarrec <florent@enjoy-digital.fr>
|
|
// LiteETH lwIP port for ARTIQ
|
|
// License: BSD
|
|
|
|
#include <generated/csr.h>
|
|
|
|
#ifdef CSR_ETHMAC_BASE
|
|
|
|
#include <lwip/opt.h>
|
|
#include <lwip/mem.h>
|
|
|
|
#include <netif/etharp.h>
|
|
#include "netif/liteethif.h"
|
|
|
|
#include <hw/flags.h>
|
|
#include <hw/ethmac_mem.h>
|
|
|
|
static unsigned int rxslot;
|
|
static unsigned int rxlen;
|
|
static char *rxbuffer;
|
|
static char *rxbuffer0;
|
|
static char *rxbuffer1;
|
|
static unsigned int txslot;
|
|
static unsigned int txlen;
|
|
static char *txbuffer;
|
|
static char *txbuffer0;
|
|
static char *txbuffer1;
|
|
|
|
#define IFNAME0 'e'
|
|
#define IFNAME1 't'
|
|
|
|
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 err_t liteeth_low_level_output(struct netif *netif, struct pbuf *p)
|
|
{
|
|
struct pbuf *q;
|
|
|
|
txlen = 0;
|
|
q = p;
|
|
while(q) {
|
|
memcpy(txbuffer, q->payload, q->len);
|
|
txbuffer += q->len;
|
|
txlen += q->len;
|
|
if(q->tot_len != q->len)
|
|
q = q->next;
|
|
else
|
|
q = NULL;
|
|
}
|
|
|
|
ethmac_sram_reader_slot_write(txslot);
|
|
ethmac_sram_reader_length_write(txlen);
|
|
while(!ethmac_sram_reader_ready_read());
|
|
ethmac_sram_reader_start_write(1);
|
|
|
|
txslot = (txslot + 1) % 2;
|
|
if(txslot)
|
|
txbuffer = txbuffer1;
|
|
else
|
|
txbuffer = txbuffer0;
|
|
|
|
return ERR_OK;
|
|
}
|
|
|
|
static struct pbuf *liteeth_low_level_input(struct netif *netif)
|
|
{
|
|
struct pbuf *p, *q;
|
|
|
|
rxslot = ethmac_sram_writer_slot_read();
|
|
rxlen = ethmac_sram_writer_length_read();
|
|
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;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
void liteeth_input(struct netif *netif)
|
|
{
|
|
struct pbuf *p;
|
|
p = liteeth_low_level_input(netif);
|
|
if(p != NULL)
|
|
netif->input(p, netif);
|
|
}
|
|
|
|
err_t liteeth_init(struct netif *netif)
|
|
{
|
|
struct liteethif *liteethif;
|
|
|
|
liteethif = mem_malloc(sizeof(struct liteethif));
|
|
if(liteethif == NULL)
|
|
return ERR_MEM;
|
|
netif->state = liteethif;
|
|
|
|
netif->hwaddr_len = 6;
|
|
netif->name[0] = IFNAME0;
|
|
netif->name[1] = IFNAME1;
|
|
netif->output = etharp_output;
|
|
netif->linkoutput = liteeth_low_level_output;
|
|
netif->mtu = 1514;
|
|
|
|
liteethif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
|
|
|
|
liteeth_low_level_init(netif);
|
|
|
|
return ERR_OK;
|
|
}
|
|
|
|
#endif /* CSR_ETHMAC_BASE */
|