DMA_SHUTDOWN_CTRL
REG_WR32(qlt, REG_CTRL_STATUS, DMA_SHUTDOWN_CTRL);
REG_WR32(qlt, REG_CTRL_STATUS, CHIP_SOFT_RESET | DMA_SHUTDOWN_CTRL |
REG_WR32(qlt, REG_CTRL_STATUS, DMA_SHUTDOWN_CTRL | PCI_X_XFER_CTRL);
DMA_SHUTDOWN_CTRL | PCI_X_XFER_CTRL | CHIP_SOFT_RESET);