isp_semaphore
writel((sem_mask | sem_bits), isp_semaphore(ha));
value = readw(isp_semaphore(ha));
writel(sem_mask, isp_semaphore(ha));
readl(isp_semaphore(ha));
writel((sem_mask | sem_bits), isp_semaphore(ha));
value = readw(isp_semaphore(ha));