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ASoC: omap-mcpdm: Collect link direction configuration under a struct 

mcpdm_link_config will collect the link direction related configurations like
channel masks, FIFO threshold.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2013-03-20 10:47:12 +01:00 committed by Mark Brown
parent 77c641d346
commit 623766318a
1 changed files with 24 additions and 17 deletions
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41
sound/soc/omap/omap-mcpdm.c
View File

@ -45,6 +45,11 @@
#define OMAP44XX_MCPDM_L3_BASE 0x49032000
struct mcpdm_link_config {
u32 link_mask; /* channel mask for the direction */
u32 threshold; /* FIFO threshold */
};
struct omap_mcpdm {
struct device *dev;
unsigned long phys_base;
@ -53,13 +58,8 @@ struct omap_mcpdm {
struct mutex mutex;
/* channel data */
u32 dn_channels;
u32 up_channels;
/* McPDM FIFO thresholds */
u32 dn_threshold;
u32 up_threshold;
/* Playback/Capture configuration */
struct mcpdm_link_config config[2];
/* McPDM dn offsets for rx1, and 2 channels */
u32 dn_rx_offset;
@ -130,11 +130,12 @@ static void omap_mcpdm_reg_dump(struct omap_mcpdm *mcpdm) {}
static void omap_mcpdm_start(struct omap_mcpdm *mcpdm)
{
u32 ctrl = omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL);
u32 link_mask = mcpdm->config[0].link_mask | mcpdm->config[1].link_mask;
ctrl |= (MCPDM_SW_DN_RST | MCPDM_SW_UP_RST);
omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl);
ctrl |= mcpdm->dn_channels | mcpdm->up_channels;
ctrl |= link_mask;
omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl);
ctrl &= ~(MCPDM_SW_DN_RST | MCPDM_SW_UP_RST);
@ -148,11 +149,12 @@ static void omap_mcpdm_start(struct omap_mcpdm *mcpdm)
static void omap_mcpdm_stop(struct omap_mcpdm *mcpdm)
{
u32 ctrl = omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL);
u32 link_mask = mcpdm->config[0].link_mask | mcpdm->config[1].link_mask;
ctrl |= (MCPDM_SW_DN_RST | MCPDM_SW_UP_RST);
omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl);
ctrl &= ~(mcpdm->dn_channels | mcpdm->up_channels);
ctrl &= ~(link_mask);
omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl);
ctrl &= ~(MCPDM_SW_DN_RST | MCPDM_SW_UP_RST);
@ -188,8 +190,10 @@ static void omap_mcpdm_open_streams(struct omap_mcpdm *mcpdm)
omap_mcpdm_write(mcpdm, MCPDM_REG_DN_OFFSET, dn_offset);
}
omap_mcpdm_write(mcpdm, MCPDM_REG_FIFO_CTRL_DN, mcpdm->dn_threshold);
omap_mcpdm_write(mcpdm, MCPDM_REG_FIFO_CTRL_UP, mcpdm->up_threshold);
omap_mcpdm_write(mcpdm, MCPDM_REG_FIFO_CTRL_DN,
mcpdm->config[SNDRV_PCM_STREAM_PLAYBACK].threshold);
omap_mcpdm_write(mcpdm, MCPDM_REG_FIFO_CTRL_UP,
mcpdm->config[SNDRV_PCM_STREAM_CAPTURE].threshold);
omap_mcpdm_write(mcpdm, MCPDM_REG_DMAENABLE_SET,
MCPDM_DMA_DN_ENABLE | MCPDM_DMA_UP_ENABLE);
@ -296,6 +300,7 @@ static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
int stream = substream->stream;
struct omap_pcm_dma_data *dma_data;
u32 threshold;
int channels;
int link_mask = 0;
@ -325,15 +330,16 @@ static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
dma_data = snd_soc_dai_get_dma_data(dai, substream);
threshold = mcpdm->config[stream].threshold;
/* Configure McPDM channels, and DMA packet size */
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
mcpdm->dn_channels = link_mask << 3;
link_mask <<= 3;
dma_data->packet_size =
(MCPDM_DN_THRES_MAX - mcpdm->dn_threshold) * channels;
(MCPDM_DN_THRES_MAX - threshold) * channels;
} else {
mcpdm->up_channels = link_mask << 0;
dma_data->packet_size = mcpdm->up_threshold * channels;
dma_data->packet_size = threshold * channels;
}
mcpdm->config[stream].link_mask = link_mask;
return 0;
}
@ -380,8 +386,9 @@ static int omap_mcpdm_probe(struct snd_soc_dai *dai)
}
/* Configure McPDM threshold values */
mcpdm->dn_threshold = 2;
mcpdm->up_threshold = MCPDM_UP_THRES_MAX - 3;
mcpdm->config[SNDRV_PCM_STREAM_PLAYBACK].threshold = 2;
mcpdm->config[SNDRV_PCM_STREAM_CAPTURE].threshold =
MCPDM_UP_THRES_MAX - 3;
return ret;
}