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path: root/drivers/media/pci/saa7134/saa7134-alsa.c
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Diffstat (limited to 'drivers/media/pci/saa7134/saa7134-alsa.c')
-rw-r--r--drivers/media/pci/saa7134/saa7134-alsa.c117
1 files changed, 97 insertions, 20 deletions
diff --git a/drivers/media/pci/saa7134/saa7134-alsa.c b/drivers/media/pci/saa7134/saa7134-alsa.c
index 10460fd3ce3..40569894c1c 100644
--- a/drivers/media/pci/saa7134/saa7134-alsa.c
+++ b/drivers/media/pci/saa7134/saa7134-alsa.c
@@ -27,6 +27,7 @@
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <linux/interrupt.h>
+#include <linux/vmalloc.h>
#include "saa7134.h"
#include "saa7134-reg.h"
@@ -172,7 +173,9 @@ static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
dev->dmasound.bufsize, dev->dmasound.blocks);
spin_unlock(&dev->slock);
+ snd_pcm_stream_lock(dev->dmasound.substream);
snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
+ snd_pcm_stream_unlock(dev->dmasound.substream);
return;
}
@@ -272,6 +275,82 @@ static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream
return err;
}
+static int saa7134_alsa_dma_init(struct saa7134_dev *dev, int nr_pages)
+{
+ struct saa7134_dmasound *dma = &dev->dmasound;
+ struct page *pg;
+ int i;
+
+ dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
+ if (NULL == dma->vaddr) {
+ dprintk("vmalloc_32(%d pages) failed\n", nr_pages);
+ return -ENOMEM;
+ }
+
+ dprintk("vmalloc is at addr 0x%08lx, size=%d\n",
+ (unsigned long)dma->vaddr,
+ nr_pages << PAGE_SHIFT);
+
+ memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
+ dma->nr_pages = nr_pages;
+
+ dma->sglist = vzalloc(dma->nr_pages * sizeof(*dma->sglist));
+ if (NULL == dma->sglist)
+ goto vzalloc_err;
+
+ sg_init_table(dma->sglist, dma->nr_pages);
+ for (i = 0; i < dma->nr_pages; i++) {
+ pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE);
+ if (NULL == pg)
+ goto vmalloc_to_page_err;
+ sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0);
+ }
+ return 0;
+
+vmalloc_to_page_err:
+ vfree(dma->sglist);
+ dma->sglist = NULL;
+vzalloc_err:
+ vfree(dma->vaddr);
+ dma->vaddr = NULL;
+ return -ENOMEM;
+}
+
+static int saa7134_alsa_dma_map(struct saa7134_dev *dev)
+{
+ struct saa7134_dmasound *dma = &dev->dmasound;
+
+ dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist,
+ dma->nr_pages, PCI_DMA_FROMDEVICE);
+
+ if (0 == dma->sglen) {
+ pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev)
+{
+ struct saa7134_dmasound *dma = &dev->dmasound;
+
+ if (!dma->sglen)
+ return 0;
+
+ dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE);
+ dma->sglen = 0;
+ return 0;
+}
+
+static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma)
+{
+ vfree(dma->sglist);
+ dma->sglist = NULL;
+ vfree(dma->vaddr);
+ dma->vaddr = NULL;
+ return 0;
+}
+
/*
* DMA buffer initialization
*
@@ -289,9 +368,8 @@ static int dsp_buffer_init(struct saa7134_dev *dev)
BUG_ON(!dev->dmasound.bufsize);
- videobuf_dma_init(&dev->dmasound.dma);
- err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
- (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
+ err = saa7134_alsa_dma_init(dev,
+ (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
if (0 != err)
return err;
return 0;
@@ -308,7 +386,7 @@ static int dsp_buffer_free(struct saa7134_dev *dev)
{
BUG_ON(!dev->dmasound.blksize);
- videobuf_dma_free(&dev->dmasound.dma);
+ saa7134_alsa_dma_free(&dev->dmasound);
dev->dmasound.blocks = 0;
dev->dmasound.blksize = 0;
@@ -630,7 +708,7 @@ static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
/* release the old buffer */
if (substream->runtime->dma_area) {
saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
- videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
+ saa7134_alsa_dma_unmap(dev);
dsp_buffer_free(dev);
substream->runtime->dma_area = NULL;
}
@@ -646,21 +724,22 @@ static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
return err;
}
- if (0 != (err = videobuf_dma_map(&dev->pci->dev, &dev->dmasound.dma))) {
+ err = saa7134_alsa_dma_map(dev);
+ if (err) {
dsp_buffer_free(dev);
return err;
}
- if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
- videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
+ err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt);
+ if (err) {
+ saa7134_alsa_dma_unmap(dev);
dsp_buffer_free(dev);
return err;
}
- if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
- dev->dmasound.dma.sglist,
- dev->dmasound.dma.sglen,
- 0))) {
+ err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt,
+ dev->dmasound.sglist, dev->dmasound.sglen, 0);
+ if (err) {
saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
- videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
+ saa7134_alsa_dma_unmap(dev);
dsp_buffer_free(dev);
return err;
}
@@ -669,7 +748,7 @@ static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
byte, but it doesn't work. So I allocate the DMA using the
V4L functions, and force ALSA to use that as the DMA area */
- substream->runtime->dma_area = dev->dmasound.dma.vaddr;
+ substream->runtime->dma_area = dev->dmasound.vaddr;
substream->runtime->dma_bytes = dev->dmasound.bufsize;
substream->runtime->dma_addr = 0;
@@ -696,7 +775,7 @@ static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
if (substream->runtime->dma_area) {
saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
- videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
+ saa7134_alsa_dma_unmap(dev);
dsp_buffer_free(dev);
substream->runtime->dma_area = NULL;
}
@@ -1070,8 +1149,8 @@ static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
if (!enable[devnum])
return -ENODEV;
- err = snd_card_create(index[devnum], id[devnum], THIS_MODULE,
- sizeof(snd_card_saa7134_t), &card);
+ err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum],
+ THIS_MODULE, sizeof(snd_card_saa7134_t), &card);
if (err < 0)
return err;
@@ -1094,7 +1173,7 @@ static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
err = request_irq(dev->pci->irq, saa7134_alsa_irq,
- IRQF_SHARED | IRQF_DISABLED, dev->name,
+ IRQF_SHARED, dev->name,
(void*) &dev->dmasound);
if (err < 0) {
@@ -1113,8 +1192,6 @@ static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
goto __nodev;
- snd_card_set_dev(card, &chip->pci->dev);
-
/* End of "creation" */
strcpy(card->shortname, "SAA7134");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 16:18:21 +0000