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ASoC: dwc: support dw i2s in slave mode 

dw i2s controller can work in slave mode, codec being master.
dw i2s is made to support master/slave operation, by reading dwc
register.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maruthi Srinivas Bayyavarapu 2015-09-25 17:48:22 -04:00 committed by Mark Brown
parent 6ff33f3902
commit 1d957d862a
2 changed files with 57 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/sound/designware_i2s.h
View File

@ -38,6 +38,8 @@ struct i2s_clk_config_data {
struct i2s_platform_data {
#define DWC_I2S_PLAY (1 << 0)
#define DWC_I2S_RECORD (1 << 1)
#define DW_I2S_SLAVE (1 << 2)
#define DW_I2S_MASTER (1 << 3)
unsigned int cap;
int channel;
u32 snd_fmts;

92
sound/soc/dwc/designware_i2s.c
View File

@ -273,23 +273,25 @@ static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
config->sample_rate = params_rate(params);
if (dev->i2s_clk_cfg) {
ret = dev->i2s_clk_cfg(config);
if (ret < 0) {
dev_err(dev->dev, "runtime audio clk config fail\n");
return ret;
}
} else {
u32 bitclk = config->sample_rate * config->data_width * 2;
if (dev->capability & DW_I2S_MASTER) {
if (dev->i2s_clk_cfg) {
ret = dev->i2s_clk_cfg(config);
if (ret < 0) {
dev_err(dev->dev, "runtime audio clk config fail\n");
return ret;
}
} else {
u32 bitclk = config->sample_rate *
config->data_width * 2;
ret = clk_set_rate(dev->clk, bitclk);
if (ret) {
dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
ret);
return ret;
ret = clk_set_rate(dev->clk, bitclk);
if (ret) {
dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
ret);
return ret;
}
}
}
return 0;
}
@ -357,7 +359,8 @@ static int dw_i2s_suspend(struct snd_soc_dai *dai)
{
struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
clk_disable(dev->clk);
if (dev->capability & DW_I2S_MASTER)
clk_disable(dev->clk);
return 0;
}
@ -365,7 +368,8 @@ static int dw_i2s_resume(struct snd_soc_dai *dai)
{
struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
clk_enable(dev->clk);
if (dev->capability & DW_I2S_MASTER)
clk_enable(dev->clk);
return 0;
}
@ -443,6 +447,14 @@ static int dw_configure_dai(struct dw_i2s_dev *dev,
dw_i2s_dai->capture.rates = rates;
}
if (COMP1_MODE_EN(comp1)) {
dev_dbg(dev->dev, "designware: i2s master mode supported\n");
dev->capability |= DW_I2S_MASTER;
} else {
dev_dbg(dev->dev, "designware: i2s slave mode supported\n");
dev->capability |= DW_I2S_SLAVE;
}
return 0;
}
@ -529,6 +541,7 @@ static int dw_i2s_probe(struct platform_device *pdev)
struct resource *res;
int ret;
struct snd_soc_dai_driver *dw_i2s_dai;
const char *clk_id;
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev) {
@ -550,33 +563,36 @@ static int dw_i2s_probe(struct platform_device *pdev)
return PTR_ERR(dev->i2s_base);
dev->dev = &pdev->dev;
if (pdata) {
ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
if (ret < 0)
return ret;
dev->capability = pdata->cap;
dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
if (!dev->i2s_clk_cfg) {
dev_err(&pdev->dev, "no clock configure method\n");
return -ENODEV;
}
dev->clk = devm_clk_get(&pdev->dev, NULL);
clk_id = NULL;
ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
} else {
clk_id = "i2sclk";
ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
if (ret < 0)
return ret;
dev->clk = devm_clk_get(&pdev->dev, "i2sclk");
}
if (IS_ERR(dev->clk))
return PTR_ERR(dev->clk);
ret = clk_prepare_enable(dev->clk);
if (ret < 0)
return ret;
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;
}
}
dev->clk = devm_clk_get(&pdev->dev, clk_id);
if (IS_ERR(dev->clk))
return PTR_ERR(dev->clk);
ret = clk_prepare_enable(dev->clk);
if (ret < 0)
return ret;
}
dev_set_drvdata(&pdev->dev, dev);
ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component,
dw_i2s_dai, 1);
@ -597,7 +613,8 @@ static int dw_i2s_probe(struct platform_device *pdev)
return 0;
err_clk_disable:
clk_disable_unprepare(dev->clk);
if (dev->capability & DW_I2S_MASTER)
clk_disable_unprepare(dev->clk);
return ret;
}
@ -605,7 +622,8 @@ static int dw_i2s_remove(struct platform_device *pdev)
{
struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
clk_disable_unprepare(dev->clk);
if (dev->capability & DW_I2S_MASTER)
clk_disable_unprepare(dev->clk);
return 0;
}