[PATCH 2/3] ASoC: fsl_sai: Add fsl_sai_check_version function

[Shengjiu Wang]

fsl_sai_check_version can help to parse the version info
in VERID and PARAM registers.

Signed-off-by: Shengjiu Wang <shengjiu.w...@nxp.com>
---
 sound/soc/fsl/fsl_sai.c | 47 +++++++++++++++++++++++++++++++++++++++++
 sound/soc/fsl/fsl_sai.h | 28 ++++++++++++++++++++++++
 2 files changed, 75 insertions(+)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 24ca528ca2be..738b4dda7847 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -946,6 +946,48 @@ static struct regmap_config fsl_sai_regmap_config = {
        .cache_type = REGCACHE_FLAT,
 };
 
+static int fsl_sai_check_version(struct device *dev)
+{
+       struct fsl_sai *sai = dev_get_drvdata(dev);
+       unsigned char ofs = sai->soc_data->reg_offset;
+       unsigned int val;
+       int ret;
+
+       if (FSL_SAI_TCSR(ofs) == FSL_SAI_VERID)
+               return 0;
+
+       ret = regmap_read(sai->regmap, FSL_SAI_VERID, &val);
+       if (ret < 0)
+               return ret;
+
+       dev_dbg(dev, "VERID: 0x%016X\n", val);
+
+       sai->verid.major = (val & FSL_SAI_VERID_MAJOR_MASK) >>
+                          FSL_SAI_VERID_MAJOR_SHIFT;
+       sai->verid.minor = (val & FSL_SAI_VERID_MINOR_MASK) >>
+                          FSL_SAI_VERID_MINOR_SHIFT;
+       sai->verid.feature = val & FSL_SAI_VERID_FEATURE_MASK;
+
+       ret = regmap_read(sai->regmap, FSL_SAI_PARAM, &val);
+       if (ret < 0)
+               return ret;
+
+       dev_dbg(dev, "PARAM: 0x%016X\n", val);
+
+       /* Max slots per frame, power of 2 */
+       sai->param.slot_num = 1 <<
+               ((val & FSL_SAI_PARAM_SPF_MASK) >> FSL_SAI_PARAM_SPF_SHIFT);
+
+       /* Words per fifo, power of 2 */
+       sai->param.fifo_depth = 1 <<
+               ((val & FSL_SAI_PARAM_WPF_MASK) >> FSL_SAI_PARAM_WPF_SHIFT);
+
+       /* Number of datalines implemented */
+       sai->param.dataline = val & FSL_SAI_PARAM_DLN_MASK;
+
+       return 0;
+}
+
 static int fsl_sai_probe(struct platform_device *pdev)
 {
        struct device_node *np = pdev->dev.of_node;
@@ -1070,6 +1112,11 @@ static int fsl_sai_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, sai);
 
+       /* Get sai version */
+       ret = fsl_sai_check_version(&pdev->dev);
+       if (ret < 0)
+               dev_warn(&pdev->dev, "Error reading SAI version: %d\n", ret);
+
        pm_runtime_enable(&pdev->dev);
        regcache_cache_only(sai->regmap, true);
 
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index d16fc4241f41..ba7425a9e217 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -223,6 +223,32 @@ struct fsl_sai_soc_data {
        unsigned int reg_offset;
 };
 
+/**
+ * struct fsl_sai_verid - version id data
+ * @major: major version number
+ * @minor: minor version number
+ * @feature: feature specification number
+ *           0000000000000000b - Standard feature set
+ *           0000000000000000b - Standard feature set
+ */
+struct fsl_sai_verid {
+       u32 major;
+       u32 minor;
+       u32 feature;
+};
+
+/**
+ * struct fsl_sai_param - parameter data
+ * @slot_num: The maximum number of slots per frame
+ * @fifo_depth: The number of words in each FIFO (depth)
+ * @dataline: The number of datalines implemented
+ */
+struct fsl_sai_param {
+       u32 slot_num;
+       u32 fifo_depth;
+       u32 dataline;
+};
+
 struct fsl_sai {
        struct platform_device *pdev;
        struct regmap *regmap;
@@ -243,6 +269,8 @@ struct fsl_sai {
        const struct fsl_sai_soc_data *soc_data;
        struct snd_dmaengine_dai_dma_data dma_params_rx;
        struct snd_dmaengine_dai_dma_data dma_params_tx;
+       struct fsl_sai_verid verid;
+       struct fsl_sai_param param;
 };
 
 #define TX 1
-- 
2.27.0