+ snd_pcm_runtime_t *runtime = substream->runtime;
+ int err, bswap, sign;
+ u32 fmt, control;
+ unsigned long flags;
+ snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+ struct saa7134_dev *dev;
+ snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
+ unsigned int bps;
+ unsigned long size;
+ unsigned count;
+
+ size = snd_pcm_lib_buffer_bytes(substream);
+ count = snd_pcm_lib_period_bytes(substream);
+
+ saapcm->saadev->oss.substream = substream;
+ bps = runtime->rate * runtime->channels;
+ bps *= snd_pcm_format_width(runtime->format);
+ bps /= 8;
+ if (bps <= 0)
+ return -EINVAL;
+ saapcm->pcm_bps = bps;
+ saapcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
+ saapcm->pcm_count = snd_pcm_lib_period_bytes(substream);
+
+
+ dev=saa7134->saadev;
+
+ dsp_buffer_conf(dev,saapcm->pcm_count,(saapcm->pcm_size/saapcm->pcm_count));
+
+ err = dsp_buffer_init(dev);
+ if (0 != err)
+ goto fail2;
+
+ /* prepare buffer */
+ if (0 != (err = videobuf_dma_pci_map(dev->pci,&dev->oss.dma)))
+ return err;
+ if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->oss.pt)))
+ goto fail1;
+ if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->oss.pt,
+ dev->oss.dma.sglist,
+ dev->oss.dma.sglen,
+ 0)))
+ goto fail2;
+
+
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_U8:
+ case SNDRV_PCM_FORMAT_S8:
+ fmt = 0x00;
+ break;
+ case SNDRV_PCM_FORMAT_U16_LE:
+ case SNDRV_PCM_FORMAT_U16_BE:
+ case SNDRV_PCM_FORMAT_S16_LE:
+ case SNDRV_PCM_FORMAT_S16_BE:
+ fmt = 0x01;
+ break;
+ default:
+ err = -EINVAL;
+ return 1;
+ }
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S8:
+ case SNDRV_PCM_FORMAT_S16_LE:
+ case SNDRV_PCM_FORMAT_S16_BE:
+ sign = 1;
+ break;
+ default:
+ sign = 0;
+ break;
+ }
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_U16_BE:
+ case SNDRV_PCM_FORMAT_S16_BE:
+ bswap = 1; break;
+ default:
+ bswap = 0; break;
+ }
+
+ switch (dev->pci->device) {
+ case PCI_DEVICE_ID_PHILIPS_SAA7134:
+ if (1 == runtime->channels)
+ fmt |= (1 << 3);
+ if (2 == runtime->channels)
+ fmt |= (3 << 3);
+ if (sign)
+ fmt |= 0x04;
+
+ fmt |= (MIXER_ADDR_TVTUNER == dev->oss.input) ? 0xc0 : 0x80;
+ saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->oss.blksize - 1) & 0x0000ff));
+ saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->oss.blksize - 1) & 0x00ff00) >> 8);
+ saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->oss.blksize - 1) & 0xff0000) >> 16);
+ saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
+
+ break;
+ case PCI_DEVICE_ID_PHILIPS_SAA7133:
+ case PCI_DEVICE_ID_PHILIPS_SAA7135:
+ if (1 == runtime->channels)
+ fmt |= (1 << 4);
+ if (2 == runtime->channels)
+ fmt |= (2 << 4);
+ if (!sign)
+ fmt |= 0x04;
+ //saa_writel(SAA7133_NUM_SAMPLES, dev->oss.blksize -1);
+ saa_writel(SAA7133_NUM_SAMPLES, dev->oss.blksize -1);
+ saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
+ //saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210);
+ break;
+ }
+
+ dprintk("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
+ runtime->format, runtime->channels, fmt,
+ bswap ? 'b' : '-');
+ /* dma: setup channel 6 (= AUDIO) */
+ control = SAA7134_RS_CONTROL_BURST_16 |
+ SAA7134_RS_CONTROL_ME |
+ (dev->oss.pt.dma >> 12);
+ if (bswap)
+ control |= SAA7134_RS_CONTROL_BSWAP;
+
+ runtime->dma_area = dev->oss.dma.vmalloc;
+ saa_writel(SAA7134_RS_BA1(6),0);
+ saa_writel(SAA7134_RS_BA2(6),dev->oss.blksize);
+ saa_writel(SAA7134_RS_PITCH(6),0);
+ saa_writel(SAA7134_RS_CONTROL(6),control);
+
+ dev->oss.rate = runtime->rate;
+ /* start dma */
+ spin_lock_irqsave(&dev->slock,flags);
+ saa7134_dma_start(dev);
+ spin_unlock_irqrestore(&dev->slock,flags);