NVRAM_CMD
NVRAM_CMD (EXTEND + EWEN);
NVRAM_CMD(IAWRITE + addr);
NVRAM_CMD(EXTEND + EWDS)
NVRAM_CMD(IAREAD + addr);
tw32_f(NVRAM_CMD, NVRAM_CMD_RESET);
tw32(NVRAM_CMD, nvram_cmd);
if (tr32(NVRAM_CMD) & NVRAM_CMD_DONE) {
tg3_rd32_loop(tp, regs, NVRAM_CMD, 0x24);