TUSB_DMA_CTRL_REV
rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),