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485 lines
12 KiB
485 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) STMicroelectronics SA 2015 |
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* Authors: Arnaud Pouliquen <[email protected]> |
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* for STMicroelectronics. |
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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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|
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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_component *component, |
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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_component_update_bits(component, 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_component_update_bits(component, 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(component->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_component_update_bits(component, 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_component_update_bits(component, 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_component_update_bits(component, 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(component->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->component->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_component *component = dai->component; |
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if (mute) { |
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return snd_soc_component_update_bits(component, 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_component_update_bits(component, 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->component->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_component *component = dai->component; |
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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_component_update_bits(component, 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_component_update_bits(component, 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_component *component = dai->component; |
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struct sti_sas_data *drvdata = dev_get_drvdata(component->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_component *component = dai->component; |
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struct sti_sas_data *drvdata = dev_get_drvdata(component->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(component->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(component->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_component *component) |
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{ |
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struct sti_sas_data *drvdata = dev_get_drvdata(component->dev); |
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return sti_sas_init_sas_registers(component, 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_component_probe(struct snd_soc_component *component) |
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{ |
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struct sti_sas_data *drvdata = dev_get_drvdata(component->dev); |
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int ret; |
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ret = sti_sas_init_sas_registers(component, drvdata); |
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return ret; |
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} |
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static struct snd_soc_component_driver sti_sas_driver = { |
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.probe = sti_sas_component_probe, |
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.resume = sti_sas_resume, |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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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.dapm_widgets = drvdata->dev_data->dapm_widgets; |
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sti_sas_driver.num_dapm_widgets = drvdata->dev_data->num_dapm_widgets; |
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sti_sas_driver.dapm_routes = drvdata->dev_data->dapm_routes; |
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sti_sas_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 devm_snd_soc_register_component(&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 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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}; |
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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("[email protected]"); |
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MODULE_LICENSE("GPL v2");
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