DDE_WEAK int bcm_dma_chan_alloc(unsigned int a, void __iomem **out_dma_base,
int * out_dma_irq)
{
int rc = 0;
resource_size_t DMA_SIZE = SZ_4K;
void __iomem *dma_base = __arm_ioremap(DMA_BASE, DMA_SIZE, 0);
*out_dma_base = BCM2708_DMA_CHANIO(dma_base, rc);
*out_dma_irq = bcm_dma_irqs[rc];
return rc;
dde_printf("bcm_dma_chan_alloc not implemented\n");
return 0;
}
extern int bcm_dma_chan_alloc(unsigned required_feature_set,
void __iomem **out_dma_base, int *out_dma_irq)
{
struct vc_dmaman *dmaman = g_dmaman;
struct platform_device *pdev = to_platform_device(dmaman_dev);
struct resource *r;
int chan;
if (!dmaman_dev)
return -ENODEV;
mutex_lock(&dmaman->lock);
chan = vc_dmaman_chan_alloc(dmaman, required_feature_set);
if (chan < 0)
goto out;
r = platform_get_resource(pdev, IORESOURCE_IRQ, (unsigned int)chan);
if (!r) {
dev_err(dmaman_dev, "failed to get irq for DMA channel %d\n",
chan);
vc_dmaman_chan_free(dmaman, chan);
chan = -ENOENT;
goto out;
}
*out_dma_base = BCM2708_DMA_CHANIO(dmaman->dma_base, chan);
*out_dma_irq = r->start;
dev_dbg(dmaman_dev,
"Legacy API allocated channel=%d, base=%p, irq=%i\n",
chan, *out_dma_base, *out_dma_irq);
out:
mutex_unlock(&dmaman->lock);
return chan;
}