LRBR_LTHR
dev->l_reg = LRBR_LTHR(0);
writel(((u16(*)[2])buf)[tx_ptr][0], i2s_base + LRBR_LTHR(0));
writel(((u32(*)[2])buf)[tx_ptr][0], i2s_base + LRBR_LTHR(0));
readl(i2s_base + LRBR_LTHR(j));
readl(i2s_base + LRBR_LTHR(j));