static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
int err = 0;
if (cpu_is_omap343x() && mcbsp_data->bus_id == 1) {
/*
* McBSP2 in OMAP3 has 1024 * 32-bit internal audio buffer.
* Set constraint for minimum buffer size to the same than FIFO
* size in order to avoid underruns in playback startup because
* HW is keeping the DMA request active until FIFO is filled.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4096, UINT_MAX);
else
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1024, UINT_MAX);
}
if (!cpu_dai->active) {
err = omap_mcbsp_request(mcbsp_data->bus_id);
cpu_dai->active = 1;
}
return err;
}
static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
int bus_id = mcbsp_data->bus_id;
int err = 0;
if (!cpu_dai->active)
err = omap_mcbsp_request(bus_id);
/*
* OMAP3 McBSP FIFO is word structured.
* McBSP2 has 1024 + 256 = 1280 word long buffer,
* McBSP1,3,4,5 has 128 word long buffer
* This means that the size of the FIFO depends on the sample format.
* For example on McBSP3:
* 16bit samples: size is 128 * 2 = 256 bytes
* 32bit samples: size is 128 * 4 = 512 bytes
* It is simpler to place constraint for buffer and period based on
* channels.
* McBSP3 as example again (16 or 32 bit samples):
* 1 channel (mono): size is 128 frames (128 words)
* 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
* 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
*/
if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
/*
* Rule for the buffer size. We should not allow
* smaller buffer than the FIFO size to avoid underruns
*/
}
return err;
}
/*
* ======== dsp_clk_enable ========
* Purpose:
* Enable Clock .
*
*/
int dsp_clk_enable(enum dsp_clk_id clk_id)
{
int status = 0;
if (is_dsp_clk_active(dsp_clocks, clk_id)) {
dev_err(bridge, "WARN: clock id %d already enabled\n", clk_id);
goto out;
}
switch (get_clk_type(clk_id)) {
case IVA2_CLK:
clk_enable(iva2_clk);
break;
case GPT_CLK:
timer[clk_id - 1] =
omap_dm_timer_request_specific(DMT_ID(clk_id));
break;
#ifdef CONFIG_OMAP_MCBSP
case MCBSP_CLK:
mcbsp_clk_prepare(true, clk_id);
omap_mcbsp_set_io_type(MCBSP_ID(clk_id), OMAP_MCBSP_POLL_IO);
omap_mcbsp_request(MCBSP_ID(clk_id));
break;
#endif
case WDT_CLK:
dev_err(bridge, "ERROR: DSP requested to enable WDT3 clk\n");
break;
case SSI_CLK:
clk_enable(ssi.sst_fck);
clk_enable(ssi.ssr_fck);
clk_enable(ssi.ick);
/*
* The SSI module need to configured not to have the Forced
* idle for master interface. If it is set to forced idle,
* the SSI module is transitioning to standby thereby causing
* the client in the DSP hang waiting for the SSI module to
* be active after enabling the clocks
*/
ssi_clk_prepare(true);
break;
default:
dev_err(bridge, "Invalid clock id for enable\n");
status = -EPERM;
}
if (!status)
set_dsp_clk_active(&dsp_clocks, clk_id);
out:
return status;
}
static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
int err = 0;
if (!cpu_dai->active)
err = omap_mcbsp_request(mcbsp);
/*
* OMAP3 McBSP FIFO is word structured.
* McBSP2 has 1024 + 256 = 1280 word long buffer,
* McBSP1,3,4,5 has 128 word long buffer
* This means that the size of the FIFO depends on the sample format.
* For example on McBSP3:
* 16bit samples: size is 128 * 2 = 256 bytes
* 32bit samples: size is 128 * 4 = 512 bytes
* It is simpler to place constraint for buffer and period based on
* channels.
* McBSP3 as example again (16 or 32 bit samples):
* 1 channel (mono): size is 128 frames (128 words)
* 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
* 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
*/
if (mcbsp->pdata->buffer_size) {
/*
* Rule for the buffer size. We should not allow
* smaller buffer than the FIFO size to avoid underruns.
* This applies only for the playback stream.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_pcm_hw_rule_add(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
omap_mcbsp_hwrule_min_buffersize,
mcbsp,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
/* Make sure, that the period size is always even */
snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
}
snd_soc_dai_set_dma_data(cpu_dai, substream,
&mcbsp->dma_data[substream->stream]);
return err;
}
static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
int bus_id = mcbsp_data->bus_id;
int err = 0;
if (!cpu_dai->active) {
err = omap_mcbsp_request(bus_id);
cpu_dai->active = 1;
}
/*
* OMAP3 McBSP FIFO is word structured.
* McBSP2 has 1024 + 256 = 1280 word long buffer,
* McBSP1,3,4,5 has 128 word long buffer
* This means that the size of the FIFO depends on the sample format.
* For example on McBSP3:
* 16bit samples: size is 128 * 2 = 256 bytes
* 32bit samples: size is 128 * 4 = 512 bytes
* It is simpler to place constraint for buffer and period based on
* channels.
* McBSP3 as example again (16 or 32 bit samples):
* 1 channel (mono): size is 128 frames (128 words)
* 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
* 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
*/
if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
/*
* Rule for the buffer size. We should not allow
* smaller buffer than the FIFO size to avoid underruns
*/
#if 0 // FIXME: All BE must support hw_rules and constraints */
snd_pcm_hw_rule_add(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
omap_mcbsp_hwrule_min_buffersize,
mcbsp_data,
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
/* Make sure, that the period size is always even */
snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
#endif
}
return err;
}
static void init_system(void)
{
omap_mcbsp_request(OMAP_MCBSP3);
omap_mcbsp_stop(OMAP_MCBSP3);
}
