static int dma_request_interrupts(struct sata_dwc_device *hsdev, int irq)
{
int retval = 0;
int chan;
for (chan = 0; chan < DMA_NUM_CHANS; chan++) {
out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.error.low,
DMA_ENABLE_CHAN(chan));
out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.tfr.low,
DMA_ENABLE_CHAN(chan));
}
retval = request_irq(irq, dma_dwc_interrupt, 0, "SATA DMA", hsdev);
if (retval) {
dev_err(host_pvt.dwc_dev, "%s: could not get IRQ %d\n",
__func__, irq);
return -ENODEV;
}
hsdev->irq_dma = irq;
return 0;
}
/*
* Function: dma_request_interrupts
* arguments: hsdev
* returns status
* This function registers ISR for a particular DMA channel interrupt
*/
static int dma_request_interrupts(struct sata_dwc_device *hsdev, int irq)
{
int retval = 0;
int chan = host_pvt.dma_channel;
if (chan >= 0) {
/* Unmask error interrupt */
out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.error.low,
DMA_ENABLE_CHAN(chan));
/* Unmask end-of-transfer interrupt */
out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.tfr.low,
DMA_ENABLE_CHAN(chan));
}
retval = request_irq(irq, dma_dwc_interrupt, 0, "SATA DMA", hsdev);
if (retval) {
dev_err(host_pvt.dwc_dev, "%s: could not get IRQ %d\n",
__func__, irq);
return -ENODEV;
}
/* Mark this interrupt as requested */
hsdev->irq_dma = irq;
return 0;
}
static void dma_dwc_xfer_start(int dma_ch)
{
out_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low),
in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)) |
DMA_ENABLE_CHAN(dma_ch));
}
