@@ -17,6 +17,7 @@
* in the file called COPYING.
*/
+#include <linux/of_platform.h>
#include <linux/module.h>
#include <sound/soc.h>
@@ -24,6 +25,77 @@
* The everest 7134 is a very simple DA converter with no register
*/
+struct es7134_clock_mode {
+ unsigned int rate_min;
+ unsigned int rate_max;
+ unsigned int *mclk_fs;
+ unsigned int mclk_fs_num;
+};
+
+struct es7134_chip {
+ const struct es7134_clock_mode *modes;
+ unsigned int mode_num;
+};
+
+struct es7134_data {
+ unsigned int mclk;
+ const struct es7134_chip *chip;
+};
+
+static int es7134_check_mclk(struct snd_soc_dai *dai,
+ struct es7134_data *priv,
+ unsigned int rate)
+{
+ unsigned int mfs = priv->mclk / rate;
+ int i, j;
+
+ for (i = 0; i < priv->chip->mode_num; i++) {
+ const struct es7134_clock_mode *mode = &priv->chip->modes[i];
+
+ if (rate < mode->rate_min || rate > mode->rate_max)
+ continue;
+
+ for (j = 0; j < mode->mclk_fs_num; j++) {
+ if (mode->mclk_fs[j] == mfs)
+ return 0;
+ }
+
+ dev_err(dai->dev, "unsupported mclk_fs %u for rate %u\n",
+ mfs, rate);
+ return -EINVAL;
+ }
+
+ /* should not happen */
+ dev_err(dai->dev, "unsupported rate: %u\n", rate);
+ return -EINVAL;
+}
+
+static int es7134_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
+
+ /* mclk has not been provided, assume it is OK */
+ if (!priv->mclk)
+ return 0;
+
+ return es7134_check_mclk(dai, priv, params_rate(params));
+}
+
+static int es7134_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
+
+ if (dir == SND_SOC_CLOCK_IN && clk_id == 0) {
+ priv->mclk = freq;
+ return 0;
+ }
+
+ return -ENOTSUPP;
+}
+
static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
@@ -40,6 +112,8 @@ static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
static const struct snd_soc_dai_ops es7134_dai_ops = {
.set_fmt = es7134_set_fmt,
+ .hw_params = es7134_hw_params,
+ .set_sysclk = es7134_set_sysclk,
};
static struct snd_soc_dai_driver es7134_dai = {
@@ -62,6 +136,33 @@ static struct snd_soc_dai_driver es7134_dai = {
.ops = &es7134_dai_ops,
};
+static const struct es7134_clock_mode es7134_modes[] = {
+ {
+ /* Single speed mode */
+ .rate_min = 8000,
+ .rate_max = 50000,
+ .mclk_fs = (unsigned int[]) { 256, 384, 512, 768, 1024 },
+ .mclk_fs_num = 5,
+ }, {
+ /* Double speed mode */
+ .rate_min = 84000,
+ .rate_max = 100000,
+ .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512 },
+ .mclk_fs_num = 5,
+ }, {
+ /* Quad speed mode */
+ .rate_min = 167000,
+ .rate_max = 192000,
+ .mclk_fs = (unsigned int[]) { 128, 192, 256 },
+ .mclk_fs_num = 3,
+ },
+};
+
+static const struct es7134_chip es7134_chip = {
+ .modes = es7134_modes,
+ .mode_num = ARRAY_SIZE(es7134_modes),
+};
+
static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("AOUTL"),
SND_SOC_DAPM_OUTPUT("AOUTR"),
@@ -86,6 +187,20 @@ static const struct snd_soc_component_driver es7134_component_driver = {
static int es7134_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
+ struct es7134_data *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, priv);
+
+ priv->chip = of_device_get_match_data(dev);
+ if (!priv->chip) {
+ dev_err(dev, "failed to match device\n");
+ return -ENODEV;
+ }
+
return devm_snd_soc_register_component(&pdev->dev,
&es7134_component_driver,
&es7134_dai, 1);
@@ -93,8 +208,8 @@ static int es7134_probe(struct platform_device *pdev)
#ifdef CONFIG_OF
static const struct of_device_id es7134_ids[] = {
- { .compatible = "everest,es7134", },
- { .compatible = "everest,es7144", },
+ { .compatible = "everest,es7134", .data = &es7134_chip },
+ { .compatible = "everest,es7144", .data = &es7134_chip },
{ }
};
MODULE_DEVICE_TABLE(of, es7134_ids);
For each supported sample rate, the es7134 can work with several mclk / sample rate ratio. Check if ratio we get is actually OK. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- sound/soc/codecs/es7134.c | 119 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 117 insertions(+), 2 deletions(-) -- 2.14.4