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path: root/sound/soc/omap/omap-mcpdm.c
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Diffstat (limited to 'sound/soc/omap/omap-mcpdm.c')
-rw-r--r--sound/soc/omap/omap-mcpdm.c109
1 files changed, 65 insertions, 44 deletions
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
index 4cc98071aa91..eb05c7ed6d05 100644
--- a/sound/soc/omap/omap-mcpdm.c
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -39,11 +39,14 @@
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
#include "omap-mcpdm.h"
-#include "omap-pcm.h"
-#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;
@@ -53,29 +56,22 @@ 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;
+
+ /* McPDM needs to be restarted due to runtime reconfiguration */
+ bool restart;
+
+ struct snd_dmaengine_dai_dma_data dma_data[2];
+ unsigned int dma_req[2];
};
/*
* Stream DMA parameters
*/
-static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
- {
- .name = "Audio playback",
- },
- {
- .name = "Audio capture",
- },
-};
static inline void omap_mcpdm_write(struct omap_mcpdm *mcpdm, u16 reg, u32 val)
{
@@ -130,11 +126,12 @@ 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 +145,12 @@ 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_PDM_DN_MASK | MCPDM_PDM_UP_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 +186,10 @@ 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);
@@ -267,7 +267,7 @@ static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
mutex_unlock(&mcpdm->mutex);
snd_soc_dai_set_dma_data(dai, substream,
- &omap_mcpdm_dai_dma_params[substream->stream]);
+ &mcpdm->dma_data[substream->stream]);
return 0;
}
@@ -283,6 +283,8 @@ static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
if (omap_mcpdm_active(mcpdm)) {
omap_mcpdm_stop(mcpdm);
omap_mcpdm_close_streams(mcpdm);
+ mcpdm->config[0].link_mask = 0;
+ mcpdm->config[1].link_mask = 0;
}
}
@@ -295,7 +297,8 @@ 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;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+ u32 threshold;
int channels;
int link_mask = 0;
@@ -325,16 +328,32 @@ 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;
- dma_data->packet_size =
- (MCPDM_DN_THRES_MAX - mcpdm->dn_threshold) * channels;
+ link_mask <<= 3;
+
+ /* If capture is not running assume a stereo stream to come */
+ if (!mcpdm->config[!stream].link_mask)
+ mcpdm->config[!stream].link_mask = 0x3;
+
+ dma_data->maxburst =
+ (MCPDM_DN_THRES_MAX - threshold) * channels;
} else {
- mcpdm->up_channels = link_mask << 0;
- dma_data->packet_size = mcpdm->up_threshold * channels;
+ /* If playback is not running assume a stereo stream to come */
+ if (!mcpdm->config[!stream].link_mask)
+ mcpdm->config[!stream].link_mask = (0x3 << 3);
+
+ dma_data->maxburst = threshold * channels;
}
+ /* Check if we need to restart McPDM with this stream */
+ if (mcpdm->config[stream].link_mask &&
+ mcpdm->config[stream].link_mask != link_mask)
+ mcpdm->restart = true;
+
+ mcpdm->config[stream].link_mask = link_mask;
+
return 0;
}
@@ -346,6 +365,11 @@ static int omap_mcpdm_prepare(struct snd_pcm_substream *substream,
if (!omap_mcpdm_active(mcpdm)) {
omap_mcpdm_start(mcpdm);
omap_mcpdm_reg_dump(mcpdm);
+ } else if (mcpdm->restart) {
+ omap_mcpdm_stop(mcpdm);
+ omap_mcpdm_start(mcpdm);
+ mcpdm->restart = false;
+ omap_mcpdm_reg_dump(mcpdm);
}
return 0;
@@ -369,7 +393,7 @@ static int omap_mcpdm_probe(struct snd_soc_dai *dai)
pm_runtime_get_sync(mcpdm->dev);
omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, 0x00);
- ret = request_irq(mcpdm->irq, omap_mcpdm_irq_handler,
+ ret = devm_request_irq(mcpdm->dev, mcpdm->irq, omap_mcpdm_irq_handler,
0, "McPDM", (void *)mcpdm);
pm_runtime_put_sync(mcpdm->dev);
@@ -380,8 +404,9 @@ 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;
}
@@ -389,7 +414,6 @@ static int omap_mcpdm_remove(struct snd_soc_dai *dai)
{
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
- free_irq(mcpdm->irq, (void *)mcpdm);
pm_runtime_disable(mcpdm->dev);
return 0;
@@ -450,33 +474,30 @@ static int asoc_mcpdm_probe(struct platform_device *pdev)
if (res == NULL)
return -ENOMEM;
- omap_mcpdm_dai_dma_params[0].port_addr = res->start + MCPDM_REG_DN_DATA;
- omap_mcpdm_dai_dma_params[1].port_addr = res->start + MCPDM_REG_UP_DATA;
+ mcpdm->dma_data[0].addr = res->start + MCPDM_REG_DN_DATA;
+ mcpdm->dma_data[1].addr = res->start + MCPDM_REG_UP_DATA;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "dn_link");
if (!res)
return -ENODEV;
- omap_mcpdm_dai_dma_params[0].dma_req = res->start;
+ mcpdm->dma_req[0] = res->start;
+ mcpdm->dma_data[0].filter_data = &mcpdm->dma_req[0];
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "up_link");
if (!res)
return -ENODEV;
- omap_mcpdm_dai_dma_params[1].dma_req = res->start;
+ mcpdm->dma_req[1] = res->start;
+ mcpdm->dma_data[1].filter_data = &mcpdm->dma_req[1];
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
if (res == NULL)
return -ENOMEM;
- if (!devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), "McPDM"))
- return -EBUSY;
-
- mcpdm->io_base = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!mcpdm->io_base)
- return -ENOMEM;
+ mcpdm->io_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mcpdm->io_base))
+ return PTR_ERR(mcpdm->io_base);
mcpdm->irq = platform_get_irq(pdev, 0);
if (mcpdm->irq < 0)