#include <linux/init.h>
#include <linux/device.h>
#include <linux/interrupt.h>
+#include <linux/vmalloc.h>
#include <linux/dma-mapping.h>
#include <linux/pci.h>
chip->dma_risc = buf->vb.dma;
substream->runtime->dma_area = chip->dma_risc.vmalloc;
+ substream->runtime->dma_bytes = chip->dma_size;
+ substream->runtime->dma_addr = 0;
return 0;
error:
}
/*
+ * page callback (needed for mmap)
+ */
+static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
+ unsigned long offset)
+{
+ void *pageptr = substream->runtime->dma_area + offset;
+ return vmalloc_to_page(pageptr);
+}
+
+/*
* operators
*/
static struct snd_pcm_ops snd_cx88_pcm_ops = {
.prepare = snd_cx88_prepare,
.trigger = snd_cx88_card_trigger,
.pointer = snd_cx88_pointer,
+ .page = snd_cx88_page,
};
/*