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-rw-r--r--sound/soc/codecs/sti-sas.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/sound/soc/codecs/sti-sas.c b/sound/soc/codecs/sti-sas.c
new file mode 100644
index 0000000000..c421906a06
--- /dev/null
+++ b/sound/soc/codecs/sti-sas.c
@@ -0,0 +1,476 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
+ * for STMicroelectronics.
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/mfd/syscon.h>
+
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+/* DAC definitions */
+
+/* stih407 DAC registers */
+/* sysconf 5041: Audio-Gue-Control */
+#define STIH407_AUDIO_GLUE_CTRL 0x000000A4
+/* sysconf 5042: Audio-DAC-Control */
+#define STIH407_AUDIO_DAC_CTRL 0x000000A8
+
+/* DAC definitions */
+#define STIH407_DAC_SOFTMUTE 0x0
+#define STIH407_DAC_STANDBY_ANA 0x1
+#define STIH407_DAC_STANDBY 0x2
+
+#define STIH407_DAC_SOFTMUTE_MASK BIT(STIH407_DAC_SOFTMUTE)
+#define STIH407_DAC_STANDBY_ANA_MASK BIT(STIH407_DAC_STANDBY_ANA)
+#define STIH407_DAC_STANDBY_MASK BIT(STIH407_DAC_STANDBY)
+
+/* SPDIF definitions */
+#define SPDIF_BIPHASE_ENABLE 0x6
+#define SPDIF_BIPHASE_IDLE 0x7
+
+#define SPDIF_BIPHASE_ENABLE_MASK BIT(SPDIF_BIPHASE_ENABLE)
+#define SPDIF_BIPHASE_IDLE_MASK BIT(SPDIF_BIPHASE_IDLE)
+
+enum {
+ STI_SAS_DAI_SPDIF_OUT,
+ STI_SAS_DAI_ANALOG_OUT,
+};
+
+static const struct reg_default stih407_sas_reg_defaults[] = {
+ { STIH407_AUDIO_DAC_CTRL, 0x000000000 },
+ { STIH407_AUDIO_GLUE_CTRL, 0x00000040 },
+};
+
+struct sti_dac_audio {
+ struct regmap *regmap;
+ struct regmap *virt_regmap;
+ int mclk;
+};
+
+struct sti_spdif_audio {
+ struct regmap *regmap;
+ int mclk;
+};
+
+/* device data structure */
+struct sti_sas_dev_data {
+ const struct regmap_config *regmap;
+ const struct snd_soc_dai_ops *dac_ops; /* DAC function callbacks */
+ const struct snd_soc_dapm_widget *dapm_widgets; /* dapms declaration */
+ const int num_dapm_widgets; /* dapms declaration */
+ const struct snd_soc_dapm_route *dapm_routes; /* route declaration */
+ const int num_dapm_routes; /* route declaration */
+};
+
+/* driver data structure */
+struct sti_sas_data {
+ struct device *dev;
+ const struct sti_sas_dev_data *dev_data;
+ struct sti_dac_audio dac;
+ struct sti_spdif_audio spdif;
+};
+
+/* Read a register from the sysconf reg bank */
+static int sti_sas_read_reg(void *context, unsigned int reg,
+ unsigned int *value)
+{
+ struct sti_sas_data *drvdata = context;
+ int status;
+ u32 val;
+
+ status = regmap_read(drvdata->dac.regmap, reg, &val);
+ *value = (unsigned int)val;
+
+ return status;
+}
+
+/* Read a register from the sysconf reg bank */
+static int sti_sas_write_reg(void *context, unsigned int reg,
+ unsigned int value)
+{
+ struct sti_sas_data *drvdata = context;
+
+ return regmap_write(drvdata->dac.regmap, reg, value);
+}
+
+static int sti_sas_init_sas_registers(struct snd_soc_component *component,
+ struct sti_sas_data *data)
+{
+ int ret;
+ /*
+ * DAC and SPDIF are activated by default
+ * put them in IDLE to save power
+ */
+
+ /* Initialise bi-phase formatter to disabled */
+ ret = snd_soc_component_update_bits(component, STIH407_AUDIO_GLUE_CTRL,
+ SPDIF_BIPHASE_ENABLE_MASK, 0);
+
+ if (!ret)
+ /* Initialise bi-phase formatter idle value to 0 */
+ ret = snd_soc_component_update_bits(component, STIH407_AUDIO_GLUE_CTRL,
+ SPDIF_BIPHASE_IDLE_MASK, 0);
+ if (ret < 0) {
+ dev_err(component->dev, "Failed to update SPDIF registers\n");
+ return ret;
+ }
+
+ /* Init DAC configuration */
+ /* init configuration */
+ ret = snd_soc_component_update_bits(component, STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_STANDBY_MASK,
+ STIH407_DAC_STANDBY_MASK);
+
+ if (!ret)
+ ret = snd_soc_component_update_bits(component, STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_STANDBY_ANA_MASK,
+ STIH407_DAC_STANDBY_ANA_MASK);
+ if (!ret)
+ ret = snd_soc_component_update_bits(component, STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_SOFTMUTE_MASK,
+ STIH407_DAC_SOFTMUTE_MASK);
+
+ if (ret < 0) {
+ dev_err(component->dev, "Failed to update DAC registers\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+/*
+ * DAC
+ */
+static int sti_sas_dac_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ /* Sanity check only */
+ if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC) {
+ dev_err(dai->component->dev,
+ "%s: ERROR: Unsupported clocking 0x%x\n",
+ __func__, fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget stih407_sas_dapm_widgets[] = {
+ SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_STANDBY_ANA, 1, NULL, 0),
+ SND_SOC_DAPM_DAC("DAC standby", "dac_p", STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_STANDBY, 1),
+ SND_SOC_DAPM_OUTPUT("DAC Output"),
+};
+
+static const struct snd_soc_dapm_route stih407_sas_route[] = {
+ {"DAC Output", NULL, "DAC standby ana"},
+ {"DAC standby ana", NULL, "DAC standby"},
+};
+
+
+static int stih407_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
+{
+ struct snd_soc_component *component = dai->component;
+
+ if (mute) {
+ return snd_soc_component_update_bits(component, STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_SOFTMUTE_MASK,
+ STIH407_DAC_SOFTMUTE_MASK);
+ } else {
+ return snd_soc_component_update_bits(component, STIH407_AUDIO_DAC_CTRL,
+ STIH407_DAC_SOFTMUTE_MASK,
+ 0);
+ }
+}
+
+/*
+ * SPDIF
+ */
+static int sti_sas_spdif_set_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt)
+{
+ if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC) {
+ dev_err(dai->component->dev,
+ "%s: ERROR: Unsupported clocking mask 0x%x\n",
+ __func__, fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * sti_sas_spdif_trigger:
+ * Trigger function is used to ensure that BiPhase Formater is disabled
+ * before CPU dai is stopped.
+ * This is mandatory to avoid that BPF is stalled
+ */
+static int sti_sas_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ return snd_soc_component_update_bits(component, STIH407_AUDIO_GLUE_CTRL,
+ SPDIF_BIPHASE_ENABLE_MASK,
+ SPDIF_BIPHASE_ENABLE_MASK);
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ return snd_soc_component_update_bits(component, STIH407_AUDIO_GLUE_CTRL,
+ SPDIF_BIPHASE_ENABLE_MASK,
+ 0);
+ default:
+ return -EINVAL;
+ }
+}
+
+static bool sti_sas_volatile_register(struct device *dev, unsigned int reg)
+{
+ if (reg == STIH407_AUDIO_GLUE_CTRL)
+ return true;
+
+ return false;
+}
+
+/*
+ * CODEC DAIS
+ */
+
+/*
+ * sti_sas_set_sysclk:
+ * get MCLK input frequency to check that MCLK-FS ratio is coherent
+ */
+static int sti_sas_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct snd_soc_component *component = dai->component;
+ struct sti_sas_data *drvdata = dev_get_drvdata(component->dev);
+
+ if (dir == SND_SOC_CLOCK_OUT)
+ return 0;
+
+ if (clk_id != 0)
+ return -EINVAL;
+
+ switch (dai->id) {
+ case STI_SAS_DAI_SPDIF_OUT:
+ drvdata->spdif.mclk = freq;
+ break;
+
+ case STI_SAS_DAI_ANALOG_OUT:
+ drvdata->dac.mclk = freq;
+ break;
+ }
+
+ return 0;
+}
+
+static int sti_sas_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct sti_sas_data *drvdata = dev_get_drvdata(component->dev);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ switch (dai->id) {
+ case STI_SAS_DAI_SPDIF_OUT:
+ if ((drvdata->spdif.mclk / runtime->rate) != 128) {
+ dev_err(component->dev, "unexpected mclk-fs ratio\n");
+ return -EINVAL;
+ }
+ break;
+ case STI_SAS_DAI_ANALOG_OUT:
+ if ((drvdata->dac.mclk / runtime->rate) != 256) {
+ dev_err(component->dev, "unexpected mclk-fs ratio\n");
+ return -EINVAL;
+ }
+ break;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops stih407_dac_ops = {
+ .set_fmt = sti_sas_dac_set_fmt,
+ .mute_stream = stih407_sas_dac_mute,
+ .prepare = sti_sas_prepare,
+ .set_sysclk = sti_sas_set_sysclk,
+};
+
+static const struct regmap_config stih407_sas_regmap = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .fast_io = true,
+ .max_register = STIH407_AUDIO_DAC_CTRL,
+ .reg_defaults = stih407_sas_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(stih407_sas_reg_defaults),
+ .volatile_reg = sti_sas_volatile_register,
+ .cache_type = REGCACHE_MAPLE,
+ .reg_read = sti_sas_read_reg,
+ .reg_write = sti_sas_write_reg,
+};
+
+static const struct sti_sas_dev_data stih407_data = {
+ .regmap = &stih407_sas_regmap,
+ .dac_ops = &stih407_dac_ops,
+ .dapm_widgets = stih407_sas_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(stih407_sas_dapm_widgets),
+ .dapm_routes = stih407_sas_route,
+ .num_dapm_routes = ARRAY_SIZE(stih407_sas_route),
+};
+
+static struct snd_soc_dai_driver sti_sas_dai[] = {
+ {
+ .name = "sas-dai-spdif-out",
+ .id = STI_SAS_DAI_SPDIF_OUT,
+ .playback = {
+ .stream_name = "spdif_p",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 |
+ SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+ SNDRV_PCM_RATE_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = (struct snd_soc_dai_ops[]) {
+ {
+ .set_fmt = sti_sas_spdif_set_fmt,
+ .trigger = sti_sas_spdif_trigger,
+ .set_sysclk = sti_sas_set_sysclk,
+ .prepare = sti_sas_prepare,
+ }
+ },
+ },
+ {
+ .name = "sas-dai-dac",
+ .id = STI_SAS_DAI_ANALOG_OUT,
+ .playback = {
+ .stream_name = "dac_p",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int sti_sas_resume(struct snd_soc_component *component)
+{
+ struct sti_sas_data *drvdata = dev_get_drvdata(component->dev);
+
+ return sti_sas_init_sas_registers(component, drvdata);
+}
+#else
+#define sti_sas_resume NULL
+#endif
+
+static int sti_sas_component_probe(struct snd_soc_component *component)
+{
+ struct sti_sas_data *drvdata = dev_get_drvdata(component->dev);
+
+ return sti_sas_init_sas_registers(component, drvdata);
+}
+
+static struct snd_soc_component_driver sti_sas_driver = {
+ .probe = sti_sas_component_probe,
+ .resume = sti_sas_resume,
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+};
+
+static const struct of_device_id sti_sas_dev_match[] = {
+ {
+ .compatible = "st,stih407-sas-codec",
+ .data = &stih407_data,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sti_sas_dev_match);
+
+static int sti_sas_driver_probe(struct platform_device *pdev)
+{
+ struct device_node *pnode = pdev->dev.of_node;
+ struct sti_sas_data *drvdata;
+ const struct of_device_id *of_id;
+
+ /* Allocate device structure */
+ drvdata = devm_kzalloc(&pdev->dev, sizeof(struct sti_sas_data),
+ GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+
+ /* Populate data structure depending on compatibility */
+ of_id = of_match_node(sti_sas_dev_match, pnode);
+ if (!of_id->data) {
+ dev_err(&pdev->dev, "data associated to device is missing\n");
+ return -EINVAL;
+ }
+
+ drvdata->dev_data = (struct sti_sas_dev_data *)of_id->data;
+
+ /* Initialise device structure */
+ drvdata->dev = &pdev->dev;
+
+ /* Request the DAC & SPDIF registers memory region */
+ drvdata->dac.virt_regmap = devm_regmap_init(&pdev->dev, NULL, drvdata,
+ drvdata->dev_data->regmap);
+ if (IS_ERR(drvdata->dac.virt_regmap)) {
+ dev_err(&pdev->dev, "audio registers not enabled\n");
+ return PTR_ERR(drvdata->dac.virt_regmap);
+ }
+
+ /* Request the syscon region */
+ drvdata->dac.regmap =
+ syscon_regmap_lookup_by_phandle(pnode, "st,syscfg");
+ if (IS_ERR(drvdata->dac.regmap)) {
+ dev_err(&pdev->dev, "syscon registers not available\n");
+ return PTR_ERR(drvdata->dac.regmap);
+ }
+ drvdata->spdif.regmap = drvdata->dac.regmap;
+
+ sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].ops = drvdata->dev_data->dac_ops;
+
+ /* Set dapms*/
+ sti_sas_driver.dapm_widgets = drvdata->dev_data->dapm_widgets;
+ sti_sas_driver.num_dapm_widgets = drvdata->dev_data->num_dapm_widgets;
+
+ sti_sas_driver.dapm_routes = drvdata->dev_data->dapm_routes;
+ sti_sas_driver.num_dapm_routes = drvdata->dev_data->num_dapm_routes;
+
+ /* Store context */
+ dev_set_drvdata(&pdev->dev, drvdata);
+
+ return devm_snd_soc_register_component(&pdev->dev, &sti_sas_driver,
+ sti_sas_dai,
+ ARRAY_SIZE(sti_sas_dai));
+}
+
+static struct platform_driver sti_sas_platform_driver = {
+ .driver = {
+ .name = "sti-sas-codec",
+ .of_match_table = sti_sas_dev_match,
+ },
+ .probe = sti_sas_driver_probe,
+};
+
+module_platform_driver(sti_sas_platform_driver);
+
+MODULE_DESCRIPTION("audio codec for STMicroelectronics sti platforms");
+MODULE_AUTHOR("Arnaud.pouliquen@st.com");
+MODULE_LICENSE("GPL v2");