ADMA_P_ADDR
reg_write(dev, ADMA_P_ADDR[ac->ch], p_buf->dma);
u32 reg = pb ? ADMA_B_ADDR[ac->ch] : ADMA_P_ADDR[ac->ch];
u32 reg = pb ? ADMA_B_ADDR[ch] : ADMA_P_ADDR[ch];