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path: root/drivers/media/pci/cx23885/cx23885-alsa.c
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Diffstat (limited to 'drivers/media/pci/cx23885/cx23885-alsa.c')
-rw-r--r--drivers/media/pci/cx23885/cx23885-alsa.c109
1 files changed, 90 insertions, 19 deletions
diff --git a/drivers/media/pci/cx23885/cx23885-alsa.c b/drivers/media/pci/cx23885/cx23885-alsa.c
index 554798d..ae7c2e8 100644
--- a/drivers/media/pci/cx23885/cx23885-alsa.c
+++ b/drivers/media/pci/cx23885/cx23885-alsa.c
@@ -15,10 +15,6 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
@@ -84,6 +80,82 @@ MODULE_PARM_DESC(audio_debug, "enable debug messages [analog audio]");
#define AUD_INT_MCHG_IRQ (1 << 21)
#define GP_COUNT_CONTROL_RESET 0x3
+static int cx23885_alsa_dma_init(struct cx23885_audio_dev *chip, int nr_pages)
+{
+ struct cx23885_audio_buffer *buf = chip->buf;
+ struct page *pg;
+ int i;
+
+ buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
+ if (NULL == buf->vaddr) {
+ dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages);
+ return -ENOMEM;
+ }
+
+ dprintk(1, "vmalloc is at addr 0x%08lx, size=%d\n",
+ (unsigned long)buf->vaddr,
+ nr_pages << PAGE_SHIFT);
+
+ memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
+ buf->nr_pages = nr_pages;
+
+ buf->sglist = vzalloc(buf->nr_pages * sizeof(*buf->sglist));
+ if (NULL == buf->sglist)
+ goto vzalloc_err;
+
+ sg_init_table(buf->sglist, buf->nr_pages);
+ for (i = 0; i < buf->nr_pages; i++) {
+ pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
+ if (NULL == pg)
+ goto vmalloc_to_page_err;
+ sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
+ }
+ return 0;
+
+vmalloc_to_page_err:
+ vfree(buf->sglist);
+ buf->sglist = NULL;
+vzalloc_err:
+ vfree(buf->vaddr);
+ buf->vaddr = NULL;
+ return -ENOMEM;
+}
+
+static int cx23885_alsa_dma_map(struct cx23885_audio_dev *dev)
+{
+ struct cx23885_audio_buffer *buf = dev->buf;
+
+ buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
+ buf->nr_pages, PCI_DMA_FROMDEVICE);
+
+ if (0 == buf->sglen) {
+ pr_warn("%s: cx23885_alsa_map_sg failed\n", __func__);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int cx23885_alsa_dma_unmap(struct cx23885_audio_dev *dev)
+{
+ struct cx23885_audio_buffer *buf = dev->buf;
+
+ if (!buf->sglen)
+ return 0;
+
+ dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE);
+ buf->sglen = 0;
+ return 0;
+}
+
+static int cx23885_alsa_dma_free(struct cx23885_audio_buffer *buf)
+{
+ vfree(buf->sglist);
+ buf->sglist = NULL;
+ vfree(buf->vaddr);
+ buf->vaddr = NULL;
+ return 0;
+}
+
/*
* BOARD Specific: Sets audio DMA
*/
@@ -198,15 +270,18 @@ int cx23885_audio_irq(struct cx23885_dev *dev, u32 status, u32 mask)
static int dsp_buffer_free(struct cx23885_audio_dev *chip)
{
+ struct cx23885_riscmem *risc;
+
BUG_ON(!chip->dma_size);
dprintk(2, "Freeing buffer\n");
- videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
- videobuf_dma_free(chip->dma_risc);
- btcx_riscmem_free(chip->pci, &chip->buf->risc);
+ cx23885_alsa_dma_unmap(chip);
+ cx23885_alsa_dma_free(chip->buf);
+ risc = &chip->buf->risc;
+ pci_free_consistent(chip->pci, risc->size, risc->cpu, risc->dma);
kfree(chip->buf);
- chip->dma_risc = NULL;
+ chip->buf = NULL;
chip->dma_size = 0;
return 0;
@@ -289,6 +364,7 @@ static int snd_cx23885_close(struct snd_pcm_substream *substream)
return 0;
}
+
/*
* hw_params callback
*/
@@ -296,8 +372,6 @@ static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
- struct videobuf_dmabuf *dma;
-
struct cx23885_audio_buffer *buf;
int ret;
@@ -318,19 +392,18 @@ static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
return -ENOMEM;
buf->bpl = chip->period_size;
+ chip->buf = buf;
- dma = &buf->dma;
- videobuf_dma_init(dma);
- ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
+ ret = cx23885_alsa_dma_init(chip,
(PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
if (ret < 0)
goto error;
- ret = videobuf_dma_map(&chip->pci->dev, dma);
+ ret = cx23885_alsa_dma_map(chip);
if (ret < 0)
goto error;
- ret = cx23885_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
+ ret = cx23885_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
chip->period_size, chip->num_periods, 1);
if (ret < 0)
goto error;
@@ -340,10 +413,7 @@ static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
- chip->buf = buf;
- chip->dma_risc = dma;
-
- substream->runtime->dma_area = chip->dma_risc->vaddr;
+ substream->runtime->dma_area = chip->buf->vaddr;
substream->runtime->dma_bytes = chip->dma_size;
substream->runtime->dma_addr = 0;
@@ -351,6 +421,7 @@ static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
error:
kfree(buf);
+ chip->buf = NULL;
return ret;
}

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