static int pl08x_dma_busy(dmach_t ci)
{
	unsigned int reg;
	unsigned int chan_base = (unsigned int)pd.base
					+ PL08X_OS_CHAN_BASE;

	chan_base += ci * PL08X_OS_CHAN;

	/*
	 * Check channel is inactive
	 */
	reg = readl(chan_base + PL08X_OS_CCFG);

	return reg & PL08X_MASK_ACTIVE;
}