TXSTART_INIT
nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT);
enc28j60_mem_read(priv, TXSTART_INIT + 1, test_len, test_buf);
nolock_regw_write(priv, EWRPTL, TXSTART_INIT);
if (reg != TXSTART_INIT)
__func__, reg, TXSTART_INIT);
nolock_regw_write(priv, ETXNDL, TXSTART_INIT + len);
nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT);