/*
* Send a data block via Ethernet
*/
static int
ftmac100_send (struct eth_device *dev, volatile void *packet, int length)
{
struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
struct ftmac100_data *priv = dev->priv;
volatile struct ftmac100_txdes *curr_des = priv->txdes;
int tmo;
if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
debug ("%s(): no TX descriptor available\n", __func__);
return -1;
}
debug ("%s(%x, %x)\n", __func__, (int)packet, length);
length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
/* initiate a transmit sequence */
curr_des->txdes2 = (unsigned int)packet; /* TXBUF_BADR */
curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
FTMAC100_TXDES1_LTS |
FTMAC100_TXDES1_TXBUF_SIZE (length);
curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
/* start transmit */
writel (1, &ftmac100->txpd);
/* wait for transfer to succeed */
tmo = get_timer (0) + 5 * CONFIG_SYS_HZ;
while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
if (get_timer (0) >= tmo) {
debug ("%s(): timed out\n", __func__);
return -1;
}
}
debug ("%s(): packet sent\n", __func__);
return 0;
}
static void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes,
unsigned int len)
{
txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len));
}
static err_t prvLowLevelOutput( struct netif *pxNetIf, struct pbuf *p )
{
/* This is taken from lwIP example code and therefore does not conform
to the FreeRTOS coding standard. */
struct pbuf *q;
unsigned char *pucBuffer = tx_buf;
unsigned char *pucChar;
u16_t usTotalLength = p->tot_len - ETH_PAD_SIZE;
err_t xReturn = ERR_OK;
long x;
struct ftmac100_txdes *txdes;
( void ) pxNetIf;
#if defined(LWIP_DEBUG) && LWIP_NETIF_TX_SINGLE_PBUF
LWIP_ASSERT("p->next == NULL && p->len == p->tot_len", p->next == NULL && p->len == p->tot_len);
#endif
/* Initiate transfer. */
if( p->len == p->tot_len )
{
memcpy( pucBuffer, &( ( unsigned char * ) p->payload )[ ETH_PAD_SIZE ], usTotalLength );
}
else
{
/* pbuf chain, copy into contiguous tx_buf. */
if( p->tot_len >= sizeof( tx_buf ) )
{
#if LINK_STATS
LINK_STATS_INC( link.lenerr );
LINK_STATS_INC( link.drop );
#endif
xReturn = ERR_BUF;
}
else
{
pucChar = tx_buf;
for( q = p; q != NULL; q = q->next )
{
/* Send the data from the pbuf to the interface, one pbuf at a
time. The size of the data in each pbuf is kept in the ->len
variable. */
/* send data from(q->payload, q->len); */
LWIP_DEBUGF( NETIF_DEBUG, ( "NETIF: send pucChar %p q->payload %p q->len %i q->next %p\n",
pucChar, q->payload, ( int ) q->len, ( void* ) q->next ) );
if( q == p )
{
memcpy( pucChar, &( ( char * ) q->payload )[ ETH_PAD_SIZE ], q->len - ETH_PAD_SIZE );
pucChar += q->len - ETH_PAD_SIZE;
}
else
{
memcpy( pucChar, q->payload, q->len );
pucChar += q->len;
}
}
}
}
if( xReturn == ERR_OK )
{
sys_sem_wait( &pgMac100If->tx_sem );
xReturn = ERR_BUF;
#if 0 /* Only has 1 tx descriptor */
txdes = &gTxDes[0];
#else
txdes = &gTxDes[pgMac100If->tx_pointer];
pgMac100If->tx_pointer = (pgMac100If->tx_pointer + 1) & (TX_QUEUE_ENTRIES - 1);;
#endif
/* setup TX descriptor */
txdes->txdes2 = (int) pucBuffer;
txdes->txdes1 &= FTMAC100_TXDES1_EDOTR;
if (usTotalLength < 64)
usTotalLength = 64;
txdes->txdes1 |= ( FTMAC100_TXDES1_FTS | FTMAC100_TXDES1_LTS |
FTMAC100_TXDES1_TXBUF_SIZE( usTotalLength ) );
/* Descriptor owned by FTMAC */
txdes->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
/* start transmit */
FTMAC100_OFFSET_TXPD = 1;
for( x = 0; x < netifMAX_TX_ATTEMPTS; x++ )
{
if( !(txdes->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) )
{
xReturn = ERR_OK;
#if LINK_STATS
LINK_STATS_INC( link.xmit );
#endif
break;
}
else
{
vTaskDelay( netifTX_BUFFER_FREE_WAIT );
}
}
if( xReturn != ERR_OK )
{
#if LINK_STATS
LINK_STATS_INC( link.memerr );
LINK_STATS_INC( link.drop );
#endif
}
/* reset the descriptor */
txdes->txdes1 &= ~( FTMAC100_TXDES1_FTS | FTMAC100_TXDES1_LTS |
FTMAC100_TXDES1_TXBUF_SIZE( 0x7ff ) );
sys_sem_signal( &pgMac100If->tx_sem );
}
return xReturn;
}
