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[media] cx88: drop videobuf abuse in cx88-alsa 

The alsa driver uses videobuf low-level functions that are not
available in vb2, so replace them by driver-specific functions.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2014-08-29 05:25:30 -03:00 committed by Mauro Carvalho Chehab
parent 6f11adc6a5
commit b2c75abde0
1 changed files with 89 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

107
drivers/media/pci/cx88/cx88-alsa.c
View File

@ -62,7 +62,10 @@
struct cx88_audio_buffer {
unsigned int bpl;
struct btcx_riscmem risc;
struct videobuf_dmabuf dma;
void *vaddr;
struct scatterlist *sglist;
int sglen;
int nr_pages;
};
struct cx88_audio_dev {
@ -84,8 +87,6 @@ struct cx88_audio_dev {
unsigned int period_size;
unsigned int num_periods;
struct videobuf_dmabuf *dma_risc;
struct cx88_audio_buffer *buf;
struct snd_pcm_substream *substream;
@ -290,19 +291,94 @@ static irqreturn_t cx8801_irq(int irq, void *dev_id)
return IRQ_RETVAL(handled);
}
static int cx88_alsa_dma_init(struct cx88_audio_dev *chip, int nr_pages)
{
struct cx88_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 cx88_alsa_dma_map(struct cx88_audio_dev *dev)
{
struct cx88_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: cx88_alsa_map_sg failed\n", __func__);
return -ENOMEM;
}
return 0;
}
static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev)
{
struct cx88_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 cx88_alsa_dma_free(struct cx88_audio_buffer *buf)
{
vfree(buf->sglist);
buf->sglist = NULL;
vfree(buf->vaddr);
buf->vaddr = NULL;
return 0;
}
static int dsp_buffer_free(snd_cx88_card_t *chip)
{
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);
cx88_alsa_dma_unmap(chip);
cx88_alsa_dma_free(chip->buf);
btcx_riscmem_free(chip->pci, &chip->buf->risc);
kfree(chip->buf);
chip->dma_risc = NULL;
chip->dma_size = 0;
chip->buf = NULL;
return 0;
}
@ -387,7 +463,6 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
struct snd_pcm_hw_params * hw_params)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
struct videobuf_dmabuf *dma;
struct cx88_audio_buffer *buf;
int ret;
@ -408,20 +483,19 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
if (NULL == buf)
return -ENOMEM;
chip->buf = buf;
buf->bpl = chip->period_size;
dma = &buf->dma;
videobuf_dma_init(dma);
ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
ret = cx88_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 = cx88_alsa_dma_map(chip);
if (ret < 0)
goto error;
ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
ret = cx88_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
chip->period_size, chip->num_periods, 1);
if (ret < 0)
goto error;
@ -430,10 +504,7 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
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;
return 0;