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