SW2_INT_ENABLE_PCI
cx->sw2_irq_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) | val;
cx18_write_reg(cx, cx->sw2_irq_mask, SW2_INT_ENABLE_PCI);
cx->sw2_irq_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) & ~val;
cx18_write_reg(cx, cx->sw2_irq_mask, SW2_INT_ENABLE_PCI);