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-rw-r--r--sound/soc/dwc/dwc-i2s.c78
-rw-r--r--sound/soc/dwc/local.h7
2 files changed, 68 insertions, 17 deletions
diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c
index 399a489f24f2..97d652f0e84d 100644
--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -17,6 +17,7 @@
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <sound/designware_i2s.h>
@@ -149,19 +150,51 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
return IRQ_NONE;
}
+static void i2s_enable_dma(struct dw_i2s_dev *dev, u32 stream)
+{
+ u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR);
+
+ /* Enable DMA handshake for stream */
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dma_reg |= I2S_DMAEN_TXBLOCK;
+ else
+ dma_reg |= I2S_DMAEN_RXBLOCK;
+
+ i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg);
+}
+
+static void i2s_disable_dma(struct dw_i2s_dev *dev, u32 stream)
+{
+ u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR);
+
+ /* Disable DMA handshake for stream */
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_reg &= ~I2S_DMAEN_TXBLOCK;
+ i2s_write_reg(dev->i2s_base, I2S_RTXDMA, 1);
+ } else {
+ dma_reg &= ~I2S_DMAEN_RXBLOCK;
+ i2s_write_reg(dev->i2s_base, I2S_RRXDMA, 1);
+ }
+ i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg);
+}
+
static void i2s_start(struct dw_i2s_dev *dev,
struct snd_pcm_substream *substream)
{
struct i2s_clk_config_data *config = &dev->config;
i2s_write_reg(dev->i2s_base, IER, 1);
- i2s_enable_irqs(dev, substream->stream, config->chan_nr);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
i2s_write_reg(dev->i2s_base, ITER, 1);
else
i2s_write_reg(dev->i2s_base, IRER, 1);
+ if (dev->use_pio)
+ i2s_enable_irqs(dev, substream->stream, config->chan_nr);
+ else
+ i2s_enable_dma(dev, substream->stream);
+
i2s_write_reg(dev->i2s_base, CER, 1);
}
@@ -175,7 +208,10 @@ static void i2s_stop(struct dw_i2s_dev *dev,
else
i2s_write_reg(dev->i2s_base, IRER, 0);
- i2s_disable_irqs(dev, substream->stream, 8);
+ if (dev->use_pio)
+ i2s_disable_irqs(dev, substream->stream, 8);
+ else
+ i2s_disable_dma(dev, substream->stream);
if (!dev->active) {
i2s_write_reg(dev->i2s_base, CER, 0);
@@ -448,9 +484,9 @@ static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = {
static const u32 formats[COMP_MAX_WORDSIZE] = {
SNDRV_PCM_FMTBIT_S16_LE,
SNDRV_PCM_FMTBIT_S16_LE,
- SNDRV_PCM_FMTBIT_S24_LE,
- SNDRV_PCM_FMTBIT_S24_LE,
- SNDRV_PCM_FMTBIT_S32_LE,
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
0,
0,
0
@@ -557,13 +593,9 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
- u32 idx = COMP1_APB_DATA_WIDTH(comp1);
u32 idx2;
int ret;
- if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
- return -EINVAL;
-
ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000);
if (ret < 0)
return ret;
@@ -573,7 +605,6 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
dev->capability |= DWC_I2S_PLAY;
dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
- dev->play_dma_data.dt.addr_width = bus_widths[idx];
dev->play_dma_data.dt.fifo_size = fifo_depth *
(fifo_width[idx2]) >> 8;
dev->play_dma_data.dt.maxburst = 16;
@@ -583,7 +614,6 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
dev->capability |= DWC_I2S_RECORD;
dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
- dev->capture_dma_data.dt.addr_width = bus_widths[idx];
dev->capture_dma_data.dt.fifo_size = fifo_depth *
(fifo_width[idx2] >> 8);
dev->capture_dma_data.dt.maxburst = 16;
@@ -625,6 +655,14 @@ static int dw_i2s_probe(struct platform_device *pdev)
if (IS_ERR(dev->i2s_base))
return PTR_ERR(dev->i2s_base);
+ dev->reset = devm_reset_control_array_get_optional_shared(&pdev->dev);
+ if (IS_ERR(dev->reset))
+ return PTR_ERR(dev->reset);
+
+ ret = reset_control_deassert(dev->reset);
+ if (ret)
+ return ret;
+
dev->dev = &pdev->dev;
irq = platform_get_irq_optional(pdev, 0);
@@ -633,7 +671,7 @@ static int dw_i2s_probe(struct platform_device *pdev)
pdev->name, dev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to request irq\n");
- return ret;
+ goto err_assert_reset;
}
}
@@ -653,24 +691,27 @@ static int dw_i2s_probe(struct platform_device *pdev)
ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
}
if (ret < 0)
- return ret;
+ goto err_assert_reset;
if (dev->capability & DW_I2S_MASTER) {
if (pdata) {
dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
if (!dev->i2s_clk_cfg) {
dev_err(&pdev->dev, "no clock configure method\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto err_assert_reset;
}
}
dev->clk = devm_clk_get(&pdev->dev, clk_id);
- if (IS_ERR(dev->clk))
- return PTR_ERR(dev->clk);
+ if (IS_ERR(dev->clk)) {
+ ret = PTR_ERR(dev->clk);
+ goto err_assert_reset;
+ }
ret = clk_prepare_enable(dev->clk);
if (ret < 0)
- return ret;
+ goto err_assert_reset;
}
dev_set_drvdata(&pdev->dev, dev);
@@ -704,6 +745,8 @@ static int dw_i2s_probe(struct platform_device *pdev)
err_clk_disable:
if (dev->capability & DW_I2S_MASTER)
clk_disable_unprepare(dev->clk);
+err_assert_reset:
+ reset_control_assert(dev->reset);
return ret;
}
@@ -714,6 +757,7 @@ static void dw_i2s_remove(struct platform_device *pdev)
if (dev->capability & DW_I2S_MASTER)
clk_disable_unprepare(dev->clk);
+ reset_control_assert(dev->reset);
pm_runtime_disable(&pdev->dev);
}
diff --git a/sound/soc/dwc/local.h b/sound/soc/dwc/local.h
index 1c361eb6127e..ba4e397099be 100644
--- a/sound/soc/dwc/local.h
+++ b/sound/soc/dwc/local.h
@@ -53,6 +53,12 @@
#define I2S_COMP_VERSION 0x01F8
#define I2S_COMP_TYPE 0x01FC
+#define I2S_RRXDMA 0x01C4
+#define I2S_RTXDMA 0x01CC
+#define I2S_DMACR 0x0200
+#define I2S_DMAEN_RXBLOCK (1 << 16)
+#define I2S_DMAEN_TXBLOCK (1 << 17)
+
/*
* Component parameter register fields - define the I2S block's
* configuration.
@@ -89,6 +95,7 @@ union dw_i2s_snd_dma_data {
struct dw_i2s_dev {
void __iomem *i2s_base;
struct clk *clk;
+ struct reset_control *reset;
int active;
unsigned int capability;
unsigned int quirks;
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