static void mask_and_ack_dma_irq(unsigned int irq)
{
unsigned int intc_irq;
if ( irq < (IRQ_DMA_0 + HALF_DMA_NUM) ) /* DMAC Group 0 irq */
intc_irq = IRQ_DMAC0;
else if ( irq < (IRQ_DMA_0 + MAX_DMA_NUM) ) /* DMAC Group 1 irq */
intc_irq = IRQ_DMAC1;
else {
printk("%s, unexpected dma irq #%d\n", __FILE__, irq);
return ;
}
__intc_ack_irq(intc_irq);
__dmac_channel_ack_irq(irq-IRQ_DMA_0); /* needed?? add 20080506, Wolfgang */
__dmac_channel_disable_irq(irq - IRQ_DMA_0);
}
////////////////////////////////////////////////////
// 功能: 利用DMA播放数据
// 输入:
// 输出:
// 返回:
// 说明:
////////////////////////////////////////////////////
static int intr_handler_playback_dma(int arg)
{
int group,channle;
unsigned int stat,dmac;
//清除DMA标记
#ifdef KPRINTF_DEF
kprintf("play music interrupt happend\n");
#endif
channle = arg - IRQ_DMA_0;
group = (arg - IRQ_DMA_0) / HALF_DMA_NUM;
__dmac_channel_ack_irq( group , channle - group * HALF_DMA_NUM );
stat = INREG32(A_DMA_DCS(channle));
dmac = INREG32(A_DMA_DMAC(group));
#ifdef KPRINTF_DEF
if( stat & DCS_AR )
kprintf("dcs addr error\n");
if( stat & DCS_HLT)
kprintf("dcs halt error\n");
if( dmac & DMAC_ADDR_ERR )
kprintf("dmac addr error\n");
if( dmac & DMAC_HALT )
kprintf("dmac halt error\n");
#endif
if (stat & DCS_TT)
{
CLRREG32(A_DMA_DMAC(group), (DMAC_ADDR_ERR | DMAC_HALT) );
CLRREG32(A_DMA_DCS(channle), (DCS_AR | DCS_HLT | DCS_CTE | DCS_CT | DCS_TT));
DacClearPcmData(); //清空PCM数据
interrupt_count++;
}
else
kdebug(mod_media, PRINT_INFO, "stat & DCS_TT == 0\n");
return INT_DONE;
}
