static void musb_sysdma_completion(int lch, u16 ch_status, void *data)
{
u32 addr;
unsigned long flags;
struct dma_channel *channel;
struct musb_dma_channel *musb_channel =
(struct musb_dma_channel *) data;
struct musb_dma_controller *controller = musb_channel->controller;
struct musb *musb = controller->private_data;
void __iomem *mbase = controller->base;
channel = &musb_channel->channel;
DBG(2, "lch = 0x%d, ch_status = 0x%x\n", lch, ch_status);
spin_lock_irqsave(&musb->lock, flags);
if (musb_channel->transmit)
addr = (u32) omap_get_dma_src_pos(musb_channel->sysdma_channel);
else
addr = (u32) omap_get_dma_dst_pos(musb_channel->sysdma_channel);
if (musb_channel->len == 0)
channel->actual_len = 0;
else
channel->actual_len = addr - musb_channel->start_addr;
DBG(2, "ch %p, 0x%x -> 0x%x (%d / %d) %s\n",
channel, musb_channel->start_addr, addr,
channel->actual_len, musb_channel->len,
(channel->actual_len < musb_channel->len) ?
"=> reconfig 0 " : " => complete");
channel->status = MUSB_DMA_STATUS_FREE;
/* completed */
if ((musb_channel->transmit) && (channel->desired_mode == 0)
&& (channel->actual_len == musb_channel->max_packet_sz)) {
u8 epnum = musb_channel->epnum;
int offset = MUSB_EP_OFFSET(musb, epnum, MUSB_TXCSR);
u16 txcsr;
/*
* The programming guide says that we
* must clear DMAENAB before DMAMODE.
*/
musb_ep_select(musb, mbase, epnum);
txcsr = musb_readw(mbase, offset);
txcsr |= MUSB_TXCSR_TXPKTRDY;
musb_writew(mbase, offset, txcsr);
}
musb_dma_completion(musb, musb_channel->epnum, musb_channel->transmit);
spin_unlock_irqrestore(&musb->lock, flags);
return;
}
static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
dma_addr_t ptr;
snd_pcm_uframes_t offset;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
ptr = omap_get_dma_src_pos(prtd->dma_ch);
else
ptr = omap_get_dma_dst_pos(prtd->dma_ch);
offset = bytes_to_frames(runtime, ptr - runtime->dma_addr);
if (offset >= runtime->buffer_size)
offset = 0;
return offset;
}
/***************************************************************************************
*
* Get the dma posn
*
**************************************************************************************/
u_int audio_get_dma_pos(audio_stream_t * s)
{
audio_buf_t *b = &s->buffers[s->dma_tail];
u_int offset;
FN_IN;
if (b->dma_ref) {
offset = omap_get_dma_src_pos(s->lch[s->dma_q_head]) - b->dma_addr;
if (offset >= s->fragsize)
offset = s->fragsize - 4;
} else if (s->pending_frags) {
offset = b->offset;
} else {
offset = 0;
}
FN_OUT(offset);
return offset;
}
static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
dma_addr_t ptr;
snd_pcm_uframes_t offset;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
ptr = omap_get_dma_dst_pos(prtd->dma_ch);
offset = bytes_to_frames(runtime, ptr - runtime->dma_addr);
} else if (!(cpu_is_omap1510())) {
ptr = omap_get_dma_src_pos(prtd->dma_ch);
offset = bytes_to_frames(runtime, ptr - runtime->dma_addr);
} else
offset = prtd->period_index * runtime->period_size;
if (offset >= runtime->buffer_size)
offset = 0;
return offset;
}
