#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/dma.h>
+#include <mach/edma.h>
#include "davinci-pcm.h"
-#define DAVINCI_PCM_DEBUG 0
-#if DAVINCI_PCM_DEBUG
-#define DPRINTK(x...) printk(KERN_DEBUG x)
-#else
-#define DPRINTK(x...)
-#endif
-
static struct snd_pcm_hardware davinci_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
spinlock_t lock;
int period; /* current DMA period */
int master_lch; /* Master DMA channel */
- int slave_lch; /* Slave DMA channel */
+ int slave_lch; /* linked parameter RAM reload slot */
struct davinci_pcm_dma_params *params; /* DMA params */
};
dma_offset = prtd->period * period_size;
dma_pos = runtime->dma_addr + dma_offset;
- DPRINTK("audio_set_dma_params_play channel = %d dma_ptr = %x "
- "period_size=%x\n", lch, dma_pos, period_size);
+ pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
+ "dma_ptr = %x period_size=%x\n", lch, dma_pos, period_size);
data_type = prtd->params->data_type;
count = period_size / data_type;
dst_bidx = data_type;
}
- davinci_set_dma_src_params(lch, src, INCR, W8BIT);
- davinci_set_dma_dest_params(lch, dst, INCR, W8BIT);
- davinci_set_dma_src_index(lch, src_bidx, 0);
- davinci_set_dma_dest_index(lch, dst_bidx, 0);
- davinci_set_dma_transfer_params(lch, data_type, count, 1, 0, ASYNC);
+ edma_set_src(lch, src, INCR, W8BIT);
+ edma_set_dest(lch, dst, INCR, W8BIT);
+ edma_set_src_index(lch, src_bidx, 0);
+ edma_set_dest_index(lch, dst_bidx, 0);
+ edma_set_transfer_params(lch, data_type, count, 1, 0, ASYNC);
prtd->period++;
if (unlikely(prtd->period >= runtime->periods))
prtd->period = 0;
}
-static void davinci_pcm_dma_irq(int lch, u16 ch_status, void *data)
+static void davinci_pcm_dma_irq(unsigned lch, u16 ch_status, void *data)
{
struct snd_pcm_substream *substream = data;
struct davinci_runtime_data *prtd = substream->runtime->private_data;
- DPRINTK("lch=%d, status=0x%x\n", lch, ch_status);
+ pr_debug("davinci_pcm: lch=%d, status=0x%x\n", lch, ch_status);
if (unlikely(ch_status != DMA_COMPLETE))
return;
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct davinci_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
- int tcc = TCC_ANY;
+ struct edmacc_param p_ram;
int ret;
if (!dma_data)
prtd->params = dma_data;
/* Request master DMA channel */
- ret = davinci_request_dma(prtd->params->channel, prtd->params->name,
+ ret = edma_alloc_channel(prtd->params->channel,
davinci_pcm_dma_irq, substream,
- &prtd->master_lch, &tcc, EVENTQ_0);
- if (ret)
+ EVENTQ_0);
+ if (ret < 0)
return ret;
+ prtd->master_lch = ret;
- /* Request slave DMA channel */
- ret = davinci_request_dma(PARAM_ANY, "Link",
- NULL, NULL, &prtd->slave_lch, &tcc, EVENTQ_0);
- if (ret) {
- davinci_free_dma(prtd->master_lch);
+ /* Request parameter RAM reload slot */
+ ret = edma_alloc_slot(EDMA_SLOT_ANY);
+ if (ret < 0) {
+ edma_free_channel(prtd->master_lch);
return ret;
}
-
- /* Link slave DMA channel in loopback */
- davinci_dma_link_lch(prtd->slave_lch, prtd->slave_lch);
+ prtd->slave_lch = ret;
+
+ /* Issue transfer completion IRQ when the channel completes a
+ * transfer, then always reload from the same slot (by a kind
+ * of loopback link). The completion IRQ handler will update
+ * the reload slot with a new buffer.
+ *
+ * REVISIT save p_ram here after setting up everything except
+ * the buffer and its length (ccnt) ... use it as a template
+ * so davinci_pcm_enqueue_dma() takes less time in IRQ.
+ */
+ edma_read_slot(prtd->slave_lch, &p_ram);
+ p_ram.opt |= TCINTEN | EDMA_TCC(prtd->master_lch);
+ p_ram.link_bcntrld = prtd->slave_lch << 5;
+ edma_write_slot(prtd->slave_lch, &p_ram);
return 0;
}
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- davinci_start_dma(prtd->master_lch);
+ edma_start(prtd->master_lch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- davinci_stop_dma(prtd->master_lch);
+ edma_stop(prtd->master_lch);
break;
default:
ret = -EINVAL;
static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
- struct paramentry_descriptor temp;
+ struct edmacc_param temp;
prtd->period = 0;
davinci_pcm_enqueue_dma(substream);
- /* Get slave channel dma params for master channel startup */
- davinci_get_dma_params(prtd->slave_lch, &temp);
- davinci_set_dma_params(prtd->master_lch, &temp);
+ /* Copy self-linked parameter RAM entry into master channel */
+ edma_read_slot(prtd->slave_lch, &temp);
+ edma_write_slot(prtd->master_lch, &temp);
return 0;
}
spin_lock(&prtd->lock);
- davinci_dma_getposition(prtd->master_lch, &src, &dst);
+ edma_get_position(prtd->master_lch, &src, &dst);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
count = src - runtime->dma_addr;
else
- count = dst - runtime->dma_addr;;
+ count = dst - runtime->dma_addr;
spin_unlock(&prtd->lock);
struct snd_pcm_runtime *runtime = substream->runtime;
struct davinci_runtime_data *prtd = runtime->private_data;
- davinci_dma_unlink_lch(prtd->slave_lch, prtd->slave_lch);
+ edma_unlink(prtd->slave_lch);
- davinci_free_dma(prtd->slave_lch);
- davinci_free_dma(prtd->master_lch);
+ edma_free_slot(prtd->slave_lch);
+ edma_free_channel(prtd->master_lch);
kfree(prtd);
runtime->dma_bytes);
}
-struct snd_pcm_ops davinci_pcm_ops = {
+static struct snd_pcm_ops davinci_pcm_ops = {
.open = davinci_pcm_open,
.close = davinci_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
&buf->addr, GFP_KERNEL);
- DPRINTK("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- (void *) buf->area, (void *) buf->addr, size);
+ pr_debug("davinci_pcm: preallocate_dma_buffer: area=%p, addr=%p, "
+ "size=%d\n", (void *) buf->area, (void *) buf->addr, size);
if (!buf->area)
return -ENOMEM;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff