static int cs8900_open(struct eth_device *dev)
{
struct cs8900_priv *priv = (struct cs8900_priv *)dev->priv;
cs8900_reset(priv);
cs8900_reginit(priv);
return 0;
}
/* Send a data block via Ethernet. */
static int cs8900_send(struct eth_device *dev,
volatile void *packet, int length)
{
volatile u16 *addr;
int tmo;
u16 s;
struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
retry:
/* initiate a transmit sequence */
REG_WRITE(PP_TxCmd_TxStart_Full, &priv->regs->txcmd);
REG_WRITE(length, &priv->regs->txlen);
/* Test to see if the chip has allocated memory for the packet */
if ((get_reg(dev, PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
/* Oops... this should not happen! */
debug("cs: unable to send packet; retrying...\n");
for (tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
get_timer(0) < tmo;)
/*NOP*/;
cs8900_reset(dev);
cs8900_reginit(dev);
goto retry;
}
/* Write the contents of the packet */
/* assume even number of bytes */
for (addr = packet; length > 0; length -= 2)
REG_WRITE(*addr++, &priv->regs->rtdata);
/* wait for transfer to succeed */
tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
while ((s = get_reg(dev, PP_TER) & ~0x1F) == 0) {
if (get_timer(0) >= tmo)
break;
}
/* nothing */ ;
if((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
debug("\ntransmission error %#x\n", s);
}
return 0;
}
static int cs8900_init(struct eth_device *dev, bd_t * bd)
{
uchar *enetaddr = dev->enetaddr;
u16 id;
/* verify chip id */
id = get_reg_init_bus(dev, PP_ChipID);
if (id != 0x630e) {
printf ("CS8900 Ethernet chip not found: "
"ID=0x%04x instead 0x%04x\n", id, 0x630e);
return 1;
}
cs8900_reset (dev);
/* set the ethernet address */
put_reg(dev, PP_IA + 0, enetaddr[0] | (enetaddr[1] << 8));
put_reg(dev, PP_IA + 2, enetaddr[2] | (enetaddr[3] << 8));
put_reg(dev, PP_IA + 4, enetaddr[4] | (enetaddr[5] << 8));
cs8900_reginit(dev);
return 0;
}