diff options
Diffstat (limited to 'sound/soc/codecs/sti-sas.c')
| -rw-r--r-- | sound/soc/codecs/sti-sas.c | 627 |
1 files changed, 627 insertions, 0 deletions
diff --git a/sound/soc/codecs/sti-sas.c b/sound/soc/codecs/sti-sas.c new file mode 100644 index 000000000000..32db2c25a33f --- /dev/null +++ b/sound/soc/codecs/sti-sas.c @@ -0,0 +1,627 @@ +/* + * Copyright (C) STMicroelectronics SA 2015 + * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com> + * for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#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> + +/* chipID supported */ +#define CHIPID_STIH416 0 +#define CHIPID_STIH407 1 + +/* DAC definitions */ + +/* stih416 DAC registers */ +/* sysconf 2517: Audio-DAC-Control */ +#define STIH416_AUDIO_DAC_CTRL 0x00000814 +/* sysconf 2519: Audio-Gue-Control */ +#define STIH416_AUDIO_GLUE_CTRL 0x0000081C + +#define STIH416_DAC_NOT_STANDBY 0x3 +#define STIH416_DAC_SOFTMUTE 0x4 +#define STIH416_DAC_ANA_NOT_PWR 0x5 +#define STIH416_DAC_NOT_PNDBG 0x6 + +#define STIH416_DAC_NOT_STANDBY_MASK BIT(STIH416_DAC_NOT_STANDBY) +#define STIH416_DAC_SOFTMUTE_MASK BIT(STIH416_DAC_SOFTMUTE) +#define STIH416_DAC_ANA_NOT_PWR_MASK BIT(STIH416_DAC_ANA_NOT_PWR) +#define STIH416_DAC_NOT_PNDBG_MASK BIT(STIH416_DAC_NOT_PNDBG) + +/* 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 stih416_sas_reg_defaults[] = { + { STIH407_AUDIO_GLUE_CTRL, 0x00000040 }, + { STIH407_AUDIO_DAC_CTRL, 0x000000000 }, +}; + +static const struct reg_default stih407_sas_reg_defaults[] = { + { STIH416_AUDIO_DAC_CTRL, 0x000000000 }, + { STIH416_AUDIO_GLUE_CTRL, 0x00000040 }, +}; + +struct sti_dac_audio { + struct regmap *regmap; + struct regmap *virt_regmap; + struct regmap_field **field; + struct reset_control *rst; + int mclk; +}; + +struct sti_spdif_audio { + struct regmap *regmap; + struct regmap_field **field; + int mclk; +}; + +/* device data structure */ +struct sti_sas_dev_data { + const int chipid; /* IC version */ + 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; + int status; + + status = regmap_write(drvdata->dac.regmap, reg, value); + + return status; +} + +static int sti_sas_init_sas_registers(struct snd_soc_codec *codec, + 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_update_bits(codec, STIH407_AUDIO_GLUE_CTRL, + SPDIF_BIPHASE_ENABLE_MASK, 0); + + if (!ret) + /* Initialise bi-phase formatter idle value to 0 */ + ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL, + SPDIF_BIPHASE_IDLE_MASK, 0); + if (ret < 0) { + dev_err(codec->dev, "Failed to update SPDIF registers"); + return ret; + } + + /* Init DAC configuration */ + switch (data->dev_data->chipid) { + case CHIPID_STIH407: + /* init configuration */ + ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL, + STIH407_DAC_STANDBY_MASK, + STIH407_DAC_STANDBY_MASK); + + if (!ret) + ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL, + STIH407_DAC_STANDBY_ANA_MASK, + STIH407_DAC_STANDBY_ANA_MASK); + if (!ret) + ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL, + STIH407_DAC_SOFTMUTE_MASK, + STIH407_DAC_SOFTMUTE_MASK); + break; + case CHIPID_STIH416: + ret = snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_NOT_STANDBY_MASK, 0); + if (!ret) + ret = snd_soc_update_bits(codec, + STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_ANA_NOT_PWR, 0); + if (!ret) + ret = snd_soc_update_bits(codec, + STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_NOT_PNDBG_MASK, + 0); + if (!ret) + ret = snd_soc_update_bits(codec, + STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_SOFTMUTE_MASK, + STIH416_DAC_SOFTMUTE_MASK); + break; + default: + return -EINVAL; + } + + if (ret < 0) { + dev_err(codec->dev, "Failed to update DAC registers"); + 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_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { + dev_err(dai->codec->dev, + "%s: ERROR: Unsupporter master mask 0x%x\n", + __func__, fmt & SND_SOC_DAIFMT_MASTER_MASK); + return -EINVAL; + } + + return 0; +} + +static int stih416_dac_probe(struct snd_soc_dai *dai) +{ + struct snd_soc_codec *codec = dai->codec; + struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev); + struct sti_dac_audio *dac = &drvdata->dac; + + /* Get reset control */ + dac->rst = devm_reset_control_get(codec->dev, "dac_rst"); + if (IS_ERR(dac->rst)) { + dev_err(dai->codec->dev, + "%s: ERROR: DAC reset control not defined (%d)!\n", + __func__, (int)dac->rst); + dac->rst = NULL; + return -EFAULT; + } + /* Put the DAC into reset */ + reset_control_assert(dac->rst); + + return 0; +} + +const struct snd_soc_dapm_widget stih416_sas_dapm_widgets[] = { + SND_SOC_DAPM_PGA("DAC bandgap", STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_NOT_PNDBG_MASK, 0, NULL, 0), + SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_ANA_NOT_PWR, 0, NULL, 0), + SND_SOC_DAPM_DAC("DAC standby", "dac_p", STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_NOT_STANDBY, 0), + SND_SOC_DAPM_OUTPUT("DAC Output"), +}; + +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"), +}; + +const struct snd_soc_dapm_route stih416_sas_route[] = { + {"DAC Output", NULL, "DAC bandgap"}, + {"DAC Output", NULL, "DAC standby ana"}, + {"DAC standby ana", NULL, "DAC standby"}, +}; + +const struct snd_soc_dapm_route stih407_sas_route[] = { + {"DAC Output", NULL, "DAC standby ana"}, + {"DAC standby ana", NULL, "DAC standby"}, +}; + +static int stih416_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream) +{ + struct snd_soc_codec *codec = dai->codec; + + if (mute) { + return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_SOFTMUTE_MASK, + STIH416_DAC_SOFTMUTE_MASK); + } else { + return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL, + STIH416_DAC_SOFTMUTE_MASK, 0); + } +} + +static int stih407_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream) +{ + struct snd_soc_codec *codec = dai->codec; + + if (mute) { + return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL, + STIH407_DAC_SOFTMUTE_MASK, + STIH407_DAC_SOFTMUTE_MASK); + } else { + return snd_soc_update_bits(codec, 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_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { + dev_err(dai->codec->dev, + "%s: ERROR: Unsupporter master mask 0x%x\n", + __func__, fmt & SND_SOC_DAIFMT_MASTER_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_codec *codec = dai->codec; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + return snd_soc_update_bits(codec, 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_update_bits(codec, 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_codec *codec = dai->codec; + struct sti_sas_data *drvdata = dev_get_drvdata(codec->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_codec *codec = dai->codec; + struct sti_sas_data *drvdata = dev_get_drvdata(codec->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(codec->dev, "unexpected mclk-fs ratio"); + return -EINVAL; + } + break; + case STI_SAS_DAI_ANALOG_OUT: + if ((drvdata->dac.mclk / runtime->rate) != 256) { + dev_err(codec->dev, "unexpected mclk-fs ratio"); + return -EINVAL; + } + break; + } + + return 0; +} + +const struct snd_soc_dai_ops stih416_dac_ops = { + .set_fmt = sti_sas_dac_set_fmt, + .mute_stream = stih416_sas_dac_mute, + .prepare = sti_sas_prepare, + .set_sysclk = sti_sas_set_sysclk, +}; + +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, +}; + +const struct regmap_config stih407_sas_regmap = { + .reg_bits = 32, + .val_bits = 32, + + .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_RBTREE, + .reg_read = sti_sas_read_reg, + .reg_write = sti_sas_write_reg, +}; + +const struct regmap_config stih416_sas_regmap = { + .reg_bits = 32, + .val_bits = 32, + + .max_register = STIH416_AUDIO_DAC_CTRL, + .reg_defaults = stih416_sas_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(stih416_sas_reg_defaults), + .volatile_reg = sti_sas_volatile_register, + .cache_type = REGCACHE_RBTREE, + .reg_read = sti_sas_read_reg, + .reg_write = sti_sas_write_reg, +}; + +const struct sti_sas_dev_data stih416_data = { + .chipid = CHIPID_STIH416, + .regmap = &stih416_sas_regmap, + .dac_ops = &stih416_dac_ops, + .dapm_widgets = stih416_sas_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(stih416_sas_dapm_widgets), + .dapm_routes = stih416_sas_route, + .num_dapm_routes = ARRAY_SIZE(stih416_sas_route), +}; + +const struct sti_sas_dev_data stih407_data = { + .chipid = CHIPID_STIH407, + .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_codec *codec) +{ + struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev); + + return sti_sas_init_sas_registers(codec, drvdata); +} +#else +#define sti_sas_resume NULL +#endif + +static int sti_sas_codec_probe(struct snd_soc_codec *codec) +{ + struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev); + int ret; + + ret = sti_sas_init_sas_registers(codec, drvdata); + + return ret; +} + +static struct snd_soc_codec_driver sti_sas_driver = { + .probe = sti_sas_codec_probe, + .resume = sti_sas_resume, +}; + +static const struct of_device_id sti_sas_dev_match[] = { + { + .compatible = "st,stih416-sas-codec", + .data = &stih416_data, + }, + { + .compatible = "st,stih407-sas-codec", + .data = &stih407_data, + }, + {}, +}; + +static int sti_sas_driver_probe(struct platform_device *pdev) +{ + struct device_node *pnode = pdev->dev.of_node; + struct sti_sas_data *drvdata; + + /* 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 */ + if (!of_match_node(sti_sas_dev_match, pnode)->data) { + dev_err(&pdev->dev, "data associated to device is missing"); + return -EINVAL; + } + + drvdata->dev_data = of_match_node(sti_sas_dev_match, pnode)->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 (!drvdata->dac.virt_regmap) { + dev_err(&pdev->dev, "audio registers not enabled\n"); + return -EFAULT; + } + + /* Request the syscon region */ + drvdata->dac.regmap = + syscon_regmap_lookup_by_phandle(pnode, "st,syscfg"); + if (!drvdata->dac.regmap) { + dev_err(&pdev->dev, "syscon registers not available\n"); + return -EFAULT; + } + drvdata->spdif.regmap = drvdata->dac.regmap; + + /* Set DAC dai probe */ + if (drvdata->dev_data->chipid == CHIPID_STIH416) + sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].probe = stih416_dac_probe; + + 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 snd_soc_register_codec(&pdev->dev, &sti_sas_driver, + sti_sas_dai, + ARRAY_SIZE(sti_sas_dai)); +} + +static int sti_sas_driver_remove(struct platform_device *pdev) +{ + snd_soc_unregister_codec(&pdev->dev); + + return 0; +} + +static struct platform_driver sti_sas_platform_driver = { + .driver = { + .name = "sti-sas-codec", + .owner = THIS_MODULE, + .of_match_table = sti_sas_dev_match, + }, + .probe = sti_sas_driver_probe, + .remove = sti_sas_driver_remove, +}; + +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"); |