diff options
Diffstat (limited to 'sound/soc/codecs/cs4234.c')
| -rw-r--r-- | sound/soc/codecs/cs4234.c | 918 |
1 files changed, 918 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs4234.c b/sound/soc/codecs/cs4234.c new file mode 100644 index 000000000000..2ea83233c3f1 --- /dev/null +++ b/sound/soc/codecs/cs4234.c @@ -0,0 +1,918 @@ +// SPDX-License-Identifier: GPL-2.0-only +// cs4234.c -- ALSA SoC CS4234 driver +// +// Copyright (C) 2020 Cirrus Logic, Inc. and +// Cirrus Logic International Semiconductor Ltd. +// + +#include <linux/clk.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/jiffies.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <sound/soc.h> +#include <sound/tlv.h> +#include <linux/workqueue.h> + +#include "cs4234.h" + +struct cs4234 { + struct device *dev; + struct regmap *regmap; + struct gpio_desc *reset_gpio; + struct regulator_bulk_data core_supplies[2]; + int num_core_supplies; + struct completion vq_ramp_complete; + struct delayed_work vq_ramp_delay; + struct clk *mclk; + unsigned long mclk_rate; + unsigned long lrclk_rate; + unsigned int format; + struct snd_ratnum rate_dividers[2]; + struct snd_pcm_hw_constraint_ratnums rate_constraint; +}; + +/* -89.92dB to +6.02dB with step of 0.38dB */ +static const DECLARE_TLV_DB_SCALE(dac_tlv, -8992, 38, 0); + +static const char * const cs4234_dac14_delay_text[] = { + "0us", "100us", "150us", "200us", "225us", "250us", "275us", "300us", + "325us", "350us", "375us", "400us", "425us", "450us", "475us", "500us", +}; +static SOC_ENUM_SINGLE_DECL(cs4234_dac14_group_delay, CS4234_TPS_CTRL, + CS4234_GRP_DELAY_SHIFT, cs4234_dac14_delay_text); + +static const char * const cs4234_noise_gate_text[] = { + "72dB", "78dB", "84dB", "90dB", "96dB", "102dB", "138dB", "Disabled", +}; +static SOC_ENUM_SINGLE_DECL(cs4234_ll_noise_gate, CS4234_LOW_LAT_CTRL1, + CS4234_LL_NG_SHIFT, cs4234_noise_gate_text); +static SOC_ENUM_SINGLE_DECL(cs4234_dac14_noise_gate, CS4234_DAC_CTRL1, + CS4234_DAC14_NG_SHIFT, cs4234_noise_gate_text); +static SOC_ENUM_SINGLE_DECL(cs4234_dac5_noise_gate, CS4234_DAC_CTRL2, + CS4234_DAC5_NG_SHIFT, cs4234_noise_gate_text); + +static const char * const cs4234_dac5_config_fltr_sel_text[] = { + "Interpolation Filter", "Sample and Hold" +}; +static SOC_ENUM_SINGLE_DECL(cs4234_dac5_config_fltr_sel, CS4234_DAC_CTRL1, + CS4234_DAC5_CFG_FLTR_SHIFT, + cs4234_dac5_config_fltr_sel_text); + +static const char * const cs4234_mute_delay_text[] = { + "1x", "4x", "16x", "64x", +}; +static SOC_ENUM_SINGLE_DECL(cs4234_mute_delay, CS4234_VOLUME_MODE, + CS4234_MUTE_DELAY_SHIFT, cs4234_mute_delay_text); + +static const char * const cs4234_minmax_delay_text[] = { + "1x", "2x", "4x", "8x", "16x", "32x", "64x", "128x", +}; +static SOC_ENUM_SINGLE_DECL(cs4234_min_delay, CS4234_VOLUME_MODE, + CS4234_MIN_DELAY_SHIFT, cs4234_minmax_delay_text); +static SOC_ENUM_SINGLE_DECL(cs4234_max_delay, CS4234_VOLUME_MODE, + CS4234_MAX_DELAY_SHIFT, cs4234_minmax_delay_text); + +static int cs4234_dac14_grp_delay_put(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *uctrl) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kctrl); + struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component); + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); + unsigned int val = 0; + int ret = 0; + + snd_soc_dapm_mutex_lock(dapm); + + regmap_read(cs4234->regmap, CS4234_ADC_CTRL2, &val); + if ((val & 0x0F) != 0x0F) { // are all the ADCs powerdown + ret = -EBUSY; + dev_err(component->dev, "Can't change group delay while ADC are ON\n"); + goto exit; + } + + regmap_read(cs4234->regmap, CS4234_DAC_CTRL4, &val); + if ((val & 0x1F) != 0x1F) { // are all the DACs powerdown + ret = -EBUSY; + dev_err(component->dev, "Can't change group delay while DAC are ON\n"); + goto exit; + } + + ret = snd_soc_put_enum_double(kctrl, uctrl); +exit: + snd_soc_dapm_mutex_unlock(dapm); + + return ret; +} + +static void cs4234_vq_ramp_done(struct work_struct *work) +{ + struct delayed_work *dw = to_delayed_work(work); + struct cs4234 *cs4234 = container_of(dw, struct cs4234, vq_ramp_delay); + + complete_all(&cs4234->vq_ramp_complete); +} + +static int cs4234_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component); + + switch (level) { + case SND_SOC_BIAS_PREPARE: + switch (snd_soc_component_get_bias_level(component)) { + case SND_SOC_BIAS_STANDBY: + wait_for_completion(&cs4234->vq_ramp_complete); + break; + default: + break; + } + break; + default: + break; + } + + return 0; +} + +static const struct snd_soc_dapm_widget cs4234_dapm_widgets[] = { + SND_SOC_DAPM_AIF_IN("SDRX1", NULL, 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_IN("SDRX2", NULL, 1, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_IN("SDRX3", NULL, 2, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_IN("SDRX4", NULL, 3, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_IN("SDRX5", NULL, 4, SND_SOC_NOPM, 0, 0), + + SND_SOC_DAPM_DAC("DAC1", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC1_SHIFT, 1), + SND_SOC_DAPM_DAC("DAC2", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC2_SHIFT, 1), + SND_SOC_DAPM_DAC("DAC3", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC3_SHIFT, 1), + SND_SOC_DAPM_DAC("DAC4", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC4_SHIFT, 1), + SND_SOC_DAPM_DAC("DAC5", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC5_SHIFT, 1), + + SND_SOC_DAPM_OUTPUT("AOUT1"), + SND_SOC_DAPM_OUTPUT("AOUT2"), + SND_SOC_DAPM_OUTPUT("AOUT3"), + SND_SOC_DAPM_OUTPUT("AOUT4"), + SND_SOC_DAPM_OUTPUT("AOUT5"), + + SND_SOC_DAPM_INPUT("AIN1"), + SND_SOC_DAPM_INPUT("AIN2"), + SND_SOC_DAPM_INPUT("AIN3"), + SND_SOC_DAPM_INPUT("AIN4"), + + SND_SOC_DAPM_ADC("ADC1", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC1_SHIFT, 1), + SND_SOC_DAPM_ADC("ADC2", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC2_SHIFT, 1), + SND_SOC_DAPM_ADC("ADC3", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC3_SHIFT, 1), + SND_SOC_DAPM_ADC("ADC4", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC4_SHIFT, 1), + + SND_SOC_DAPM_AIF_OUT("SDTX1", NULL, 0, SND_SOC_NOPM, 0, 1), + SND_SOC_DAPM_AIF_OUT("SDTX2", NULL, 1, SND_SOC_NOPM, 0, 1), + SND_SOC_DAPM_AIF_OUT("SDTX3", NULL, 2, SND_SOC_NOPM, 0, 1), + SND_SOC_DAPM_AIF_OUT("SDTX4", NULL, 3, SND_SOC_NOPM, 0, 1), +}; + +static const struct snd_soc_dapm_route cs4234_dapm_routes[] = { + /* Playback */ + { "AOUT1", NULL, "DAC1" }, + { "AOUT2", NULL, "DAC2" }, + { "AOUT3", NULL, "DAC3" }, + { "AOUT4", NULL, "DAC4" }, + { "AOUT5", NULL, "DAC5" }, + + { "DAC1", NULL, "SDRX1" }, + { "DAC2", NULL, "SDRX2" }, + { "DAC3", NULL, "SDRX3" }, + { "DAC4", NULL, "SDRX4" }, + { "DAC5", NULL, "SDRX5" }, + + { "SDRX1", NULL, "Playback" }, + { "SDRX2", NULL, "Playback" }, + { "SDRX3", NULL, "Playback" }, + { "SDRX4", NULL, "Playback" }, + { "SDRX5", NULL, "Playback" }, + + /* Capture */ + { "ADC1", NULL, "AIN1" }, + { "ADC2", NULL, "AIN2" }, + { "ADC3", NULL, "AIN3" }, + { "ADC4", NULL, "AIN4" }, + + { "SDTX1", NULL, "ADC1" }, + { "SDTX2", NULL, "ADC2" }, + { "SDTX3", NULL, "ADC3" }, + { "SDTX4", NULL, "ADC4" }, + + { "Capture", NULL, "SDTX1" }, + { "Capture", NULL, "SDTX2" }, + { "Capture", NULL, "SDTX3" }, + { "Capture", NULL, "SDTX4" }, +}; + +static const struct snd_kcontrol_new cs4234_snd_controls[] = { + SOC_SINGLE_TLV("Master Volume", CS4234_MASTER_VOL, 0, 0xff, 1, dac_tlv), + SOC_SINGLE_TLV("DAC1 Volume", CS4234_DAC1_VOL, 0, 0xff, 1, dac_tlv), + SOC_SINGLE_TLV("DAC2 Volume", CS4234_DAC2_VOL, 0, 0xff, 1, dac_tlv), + SOC_SINGLE_TLV("DAC3 Volume", CS4234_DAC3_VOL, 0, 0xff, 1, dac_tlv), + SOC_SINGLE_TLV("DAC4 Volume", CS4234_DAC4_VOL, 0, 0xff, 1, dac_tlv), + SOC_SINGLE_TLV("DAC5 Volume", CS4234_DAC5_VOL, 0, 0xff, 1, dac_tlv), + + SOC_SINGLE("DAC5 Soft Ramp Switch", CS4234_DAC_CTRL3, CS4234_DAC5_ATT_SHIFT, 1, 1), + SOC_SINGLE("DAC1-4 Soft Ramp Switch", CS4234_DAC_CTRL3, CS4234_DAC14_ATT_SHIFT, 1, 1), + + SOC_SINGLE("ADC HPF Switch", CS4234_ADC_CTRL1, CS4234_ENA_HPF_SHIFT, 1, 0), + + SOC_ENUM_EXT("DAC1-4 Group Delay", cs4234_dac14_group_delay, + snd_soc_get_enum_double, cs4234_dac14_grp_delay_put), + + SOC_SINGLE("ADC1 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC1_SHIFT, 1, 0), + SOC_SINGLE("ADC2 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC2_SHIFT, 1, 0), + SOC_SINGLE("ADC3 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC3_SHIFT, 1, 0), + SOC_SINGLE("ADC4 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC4_SHIFT, 1, 0), + + SOC_SINGLE("DAC1 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC1_SHIFT, 1, 0), + SOC_SINGLE("DAC2 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC2_SHIFT, 1, 0), + SOC_SINGLE("DAC3 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC3_SHIFT, 1, 0), + SOC_SINGLE("DAC4 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC4_SHIFT, 1, 0), + SOC_SINGLE("DAC5 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC5_SHIFT, 1, 0), + + SOC_SINGLE("ADC1 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC1_SHIFT, 1, 1), + SOC_SINGLE("ADC2 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC2_SHIFT, 1, 1), + SOC_SINGLE("ADC3 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC3_SHIFT, 1, 1), + SOC_SINGLE("ADC4 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC4_SHIFT, 1, 1), + + SOC_SINGLE("DAC1 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC1_SHIFT, 1, 1), + SOC_SINGLE("DAC2 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC2_SHIFT, 1, 1), + SOC_SINGLE("DAC3 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC3_SHIFT, 1, 1), + SOC_SINGLE("DAC4 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC4_SHIFT, 1, 1), + SOC_SINGLE("DAC5 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC5_SHIFT, 1, 1), + SOC_SINGLE("Low-latency Switch", CS4234_DAC_CTRL3, CS4234_MUTE_LL_SHIFT, 1, 1), + + SOC_SINGLE("DAC1 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1, + CS4234_INV_LL1_SHIFT, 1, 0), + SOC_SINGLE("DAC2 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1, + CS4234_INV_LL2_SHIFT, 1, 0), + SOC_SINGLE("DAC3 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1, + CS4234_INV_LL3_SHIFT, 1, 0), + SOC_SINGLE("DAC4 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1, + CS4234_INV_LL4_SHIFT, 1, 0), + + SOC_ENUM("Low-latency Noise Gate", cs4234_ll_noise_gate), + SOC_ENUM("DAC1-4 Noise Gate", cs4234_dac14_noise_gate), + SOC_ENUM("DAC5 Noise Gate", cs4234_dac5_noise_gate), + + SOC_SINGLE("DAC1-4 De-emphasis Switch", CS4234_DAC_CTRL1, + CS4234_DAC14_DE_SHIFT, 1, 0), + SOC_SINGLE("DAC5 De-emphasis Switch", CS4234_DAC_CTRL1, + CS4234_DAC5_DE_SHIFT, 1, 0), + + SOC_SINGLE("DAC5 Master Controlled Switch", CS4234_DAC_CTRL1, + CS4234_DAC5_MVC_SHIFT, 1, 0), + + SOC_ENUM("DAC5 Filter", cs4234_dac5_config_fltr_sel), + + SOC_ENUM("Mute Delay", cs4234_mute_delay), + SOC_ENUM("Ramp Minimum Delay", cs4234_min_delay), + SOC_ENUM("Ramp Maximum Delay", cs4234_max_delay), + +}; + +static int cs4234_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int format) +{ + struct snd_soc_component *component = codec_dai->component; + struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component); + unsigned int sp_ctrl = 0; + + cs4234->format = format & SND_SOC_DAIFMT_FORMAT_MASK; + switch (cs4234->format) { + case SND_SOC_DAIFMT_LEFT_J: + sp_ctrl |= CS4234_LEFT_J << CS4234_SP_FORMAT_SHIFT; + break; + case SND_SOC_DAIFMT_I2S: + sp_ctrl |= CS4234_I2S << CS4234_SP_FORMAT_SHIFT; + break; + case SND_SOC_DAIFMT_DSP_A: /* TDM mode in datasheet */ + sp_ctrl |= CS4234_TDM << CS4234_SP_FORMAT_SHIFT; + break; + default: + dev_err(component->dev, "Unsupported dai format\n"); + return -EINVAL; + } + + switch (format & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBS_CFS: + break; + case SND_SOC_DAIFMT_CBM_CFM: + if (cs4234->format == SND_SOC_DAIFMT_DSP_A) { + dev_err(component->dev, "Unsupported DSP A format in master mode\n"); + return -EINVAL; + } + sp_ctrl |= CS4234_MST_SLV_MASK; + break; + default: + dev_err(component->dev, "Unsupported master/slave mode\n"); + return -EINVAL; + } + + switch (format & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_IB_NF: + sp_ctrl |= CS4234_INVT_SCLK_MASK; + break; + default: + dev_err(component->dev, "Unsupported inverted clock setting\n"); + return -EINVAL; + } + + regmap_update_bits(cs4234->regmap, CS4234_SP_CTRL, + CS4234_SP_FORMAT_MASK | CS4234_MST_SLV_MASK | CS4234_INVT_SCLK_MASK, + sp_ctrl); + + return 0; +} + +static int cs4234_dai_hw_params(struct snd_pcm_substream *sub, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component); + unsigned int mclk_mult, double_speed = 0; + int ret = 0, rate_ad, sample_width; + + cs4234->lrclk_rate = params_rate(params); + mclk_mult = cs4234->mclk_rate / cs4234->lrclk_rate; + + if (cs4234->lrclk_rate > 48000) { + double_speed = 1; + mclk_mult *= 2; + } + + switch (mclk_mult) { + case 256: + case 384: + case 512: + regmap_update_bits(cs4234->regmap, CS4234_CLOCK_SP, + CS4234_SPEED_MODE_MASK, + double_speed << CS4234_SPEED_MODE_SHIFT); + regmap_update_bits(cs4234->regmap, CS4234_CLOCK_SP, + CS4234_MCLK_RATE_MASK, + ((mclk_mult / 128) - 2) << CS4234_MCLK_RATE_SHIFT); + break; + default: + dev_err(component->dev, "Unsupported mclk/lrclk rate\n"); + return -EINVAL; + } + + switch (cs4234->lrclk_rate) { + case 48000: + case 96000: + rate_ad = CS4234_48K; + break; + case 44100: + case 88200: + rate_ad = CS4234_44K1; + break; + case 32000: + case 64000: + rate_ad = CS4234_32K; + break; + default: + dev_err(component->dev, "Unsupported LR clock\n"); + return -EINVAL; + } + regmap_update_bits(cs4234->regmap, CS4234_CLOCK_SP, CS4234_BASE_RATE_MASK, + rate_ad << CS4234_BASE_RATE_SHIFT); + + sample_width = params_width(params); + switch (sample_width) { + case 16: + sample_width = 0; + break; + case 18: + sample_width = 1; + break; + case 20: + sample_width = 2; + break; + case 24: + sample_width = 3; + break; + default: + dev_err(component->dev, "Unsupported sample width\n"); + return -EINVAL; + } + if (sub->stream == SNDRV_PCM_STREAM_CAPTURE) + regmap_update_bits(cs4234->regmap, CS4234_SAMPLE_WIDTH, + CS4234_SDOUTX_SW_MASK, + sample_width << CS4234_SDOUTX_SW_SHIFT); + else + regmap_update_bits(cs4234->regmap, CS4234_SAMPLE_WIDTH, + CS4234_INPUT_SW_MASK | CS4234_LOW_LAT_SW_MASK | CS4234_DAC5_SW_MASK, + sample_width << CS4234_INPUT_SW_SHIFT | + sample_width << CS4234_LOW_LAT_SW_SHIFT | + sample_width << CS4234_DAC5_SW_SHIFT); + + return ret; +} + +/* Scale MCLK rate by 64 to avoid overflow in the ratnum calculation */ +#define CS4234_MCLK_SCALE 64 + +static const struct snd_ratnum cs4234_dividers[] = { + { + .num = 0, + .den_min = 256 / CS4234_MCLK_SCALE, + .den_max = 512 / CS4234_MCLK_SCALE, + .den_step = 128 / CS4234_MCLK_SCALE, + }, + { + .num = 0, + .den_min = 128 / CS4234_MCLK_SCALE, + .den_max = 192 / CS4234_MCLK_SCALE, + .den_step = 64 / CS4234_MCLK_SCALE, + }, +}; + +static int cs4234_dai_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) +{ + struct cs4234 *cs4234 = rule->private; + int mclk = cs4234->mclk_rate; + struct snd_interval ranges[] = { + { /* Single Speed Mode */ + .min = mclk / clamp(mclk / 30000, 256, 512), + .max = mclk / clamp(mclk / 50000, 256, 512), + }, + { /* Double Speed Mode */ + .min = mclk / clamp(mclk / 60000, 128, 256), + .max = mclk / clamp(mclk / 100000, 128, 256), + }, + }; + + return snd_interval_ranges(hw_param_interval(params, rule->var), + ARRAY_SIZE(ranges), ranges, 0); +} + +static int cs4234_dai_startup(struct snd_pcm_substream *sub, struct snd_soc_dai *dai) +{ + struct snd_soc_component *comp = dai->component; + struct cs4234 *cs4234 = snd_soc_component_get_drvdata(comp); + int i, ret; + + switch (cs4234->format) { + case SND_SOC_DAIFMT_LEFT_J: + case SND_SOC_DAIFMT_I2S: + cs4234->rate_constraint.nrats = 2; + + /* + * Playback only supports 24-bit samples in these modes. + * Note: SNDRV_PCM_HW_PARAM_SAMPLE_BITS constrains the physical + * width, which we don't care about, so constrain the format. + */ + if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) { + ret = snd_pcm_hw_constraint_mask64( + sub->runtime, + SNDRV_PCM_HW_PARAM_FORMAT, + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S24_3LE); + if (ret < 0) + return ret; + + ret = snd_pcm_hw_constraint_minmax(sub->runtime, + SNDRV_PCM_HW_PARAM_CHANNELS, + 1, 4); + if (ret < 0) + return ret; + } + + break; + case SND_SOC_DAIFMT_DSP_A: + cs4234->rate_constraint.nrats = 1; + break; + default: + dev_err(comp->dev, "Startup unsupported DAI format\n"); + return -EINVAL; + } + + for (i = 0; i < cs4234->rate_constraint.nrats; i++) + cs4234->rate_dividers[i].num = cs4234->mclk_rate / CS4234_MCLK_SCALE; + + ret = snd_pcm_hw_constraint_ratnums(sub->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + &cs4234->rate_constraint); + if (ret < 0) + return ret; + + /* + * MCLK/rate may be a valid ratio but out-of-spec (e.g. 24576000/64000) + * so this rule limits the range of sample rate for given MCLK. + */ + return snd_pcm_hw_rule_add(sub->runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + cs4234_dai_rule_rate, cs4234, -1); +} + +static int cs4234_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, int slot_width) +{ + struct snd_soc_component *component = dai->component; + struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component); + unsigned int slot_offset, dac5_slot, dac5_mask_group; + uint8_t dac5_masks[4]; + + if (slot_width != 32) { + dev_err(component->dev, "Unsupported slot width\n"); + return -EINVAL; + } + + /* Either 4 or 5 consecutive bits, DAC5 is optional */ + slot_offset = ffs(tx_mask) - 1; + tx_mask >>= slot_offset; + if ((slot_offset % 4) || ((tx_mask != 0x0F) && (tx_mask != 0x1F))) { + dev_err(component->dev, "Unsupported tx slots allocation\n"); + return -EINVAL; + } + + regmap_update_bits(cs4234->regmap, CS4234_SP_DATA_SEL, CS4234_DAC14_SRC_MASK, + (slot_offset / 4) << CS4234_DAC14_SRC_SHIFT); + regmap_update_bits(cs4234->regmap, CS4234_SP_DATA_SEL, CS4234_LL_SRC_MASK, + (slot_offset / 4) << CS4234_LL_SRC_SHIFT); + + if (tx_mask == 0x1F) { + dac5_slot = slot_offset + 4; + memset(dac5_masks, 0xFF, sizeof(dac5_masks)); + dac5_mask_group = dac5_slot / 8; + dac5_slot %= 8; + dac5_masks[dac5_mask_group] ^= BIT(7 - dac5_slot); + regmap_bulk_write(cs4234->regmap, + CS4234_SDIN1_MASK1, + dac5_masks, + ARRAY_SIZE(dac5_masks)); + } + + return 0; +} + +static const struct snd_soc_dai_ops cs4234_dai_ops = { + .set_fmt = cs4234_dai_set_fmt, + .hw_params = cs4234_dai_hw_params, + .startup = cs4234_dai_startup, + .set_tdm_slot = cs4234_dai_set_tdm_slot, +}; + +static struct snd_soc_dai_driver cs4234_dai[] = { + { + .name = "cs4234-dai", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 5, + .rates = CS4234_PCM_RATES, + .formats = CS4234_FORMATS, + }, + .capture = { + .stream_name = "Capture", + .channels_min = 1, + .channels_max = 4, + .rates = CS4234_PCM_RATES, + .formats = CS4234_FORMATS, + }, + .ops = &cs4234_dai_ops, + .symmetric_rates = 1, + }, +}; + +static const struct reg_default cs4234_default_reg[] = { + { CS4234_CLOCK_SP, 0x04}, + { CS4234_SAMPLE_WIDTH, 0xFF}, + { CS4234_SP_CTRL, 0x48}, + { CS4234_SP_DATA_SEL, 0x01}, + { CS4234_SDIN1_MASK1, 0xFF}, + { CS4234_SDIN1_MASK2, 0xFF}, + { CS4234_SDIN2_MASK1, 0xFF}, + { CS4234_SDIN2_MASK2, 0xFF}, + { CS4234_TPS_CTRL, 0x00}, + { CS4234_ADC_CTRL1, 0xC0}, + { CS4234_ADC_CTRL2, 0xFF}, + { CS4234_LOW_LAT_CTRL1, 0xE0}, + { CS4234_DAC_CTRL1, 0xE0}, + { CS4234_DAC_CTRL2, 0xE0}, + { CS4234_DAC_CTRL3, 0xBF}, + { CS4234_DAC_CTRL4, 0x1F}, + { CS4234_VOLUME_MODE, 0x87}, + { CS4234_MASTER_VOL, 0x10}, + { CS4234_DAC1_VOL, 0x10}, + { CS4234_DAC2_VOL, 0x10}, + { CS4234_DAC3_VOL, 0x10}, + { CS4234_DAC4_VOL, 0x10}, + { CS4234_DAC5_VOL, 0x10}, + { CS4234_INT_CTRL, 0x40}, + { CS4234_INT_MASK1, 0x10}, + { CS4234_INT_MASK2, 0x20}, +}; + +static bool cs4234_readable_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CS4234_DEVID_AB ... CS4234_DEVID_EF: + case CS4234_REVID ... CS4234_DAC5_VOL: + case CS4234_INT_CTRL ... CS4234_MAX_REGISTER: + return true; + default: + return false; + } +} + +static bool cs4234_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CS4234_INT_NOTIFY1: + case CS4234_INT_NOTIFY2: + return true; + default: + return false; + } +} + +static bool cs4234_writeable_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CS4234_DEVID_AB ... CS4234_REVID: + case CS4234_INT_NOTIFY1 ... CS4234_INT_NOTIFY2: + return false; + default: + return true; + } +} + +static const struct snd_soc_component_driver soc_component_cs4234 = { + .dapm_widgets = cs4234_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(cs4234_dapm_widgets), + .dapm_routes = cs4234_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(cs4234_dapm_routes), + .controls = cs4234_snd_controls, + .num_controls = ARRAY_SIZE(cs4234_snd_controls), + .set_bias_level = cs4234_set_bias_level, + .non_legacy_dai_naming = 1, + .idle_bias_on = 1, + .suspend_bias_off = 1, +}; + +static const struct regmap_config cs4234_regmap = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = CS4234_MAX_REGISTER, + .readable_reg = cs4234_readable_register, + .volatile_reg = cs4234_volatile_reg, + .writeable_reg = cs4234_writeable_register, + .reg_defaults = cs4234_default_reg, + .num_reg_defaults = ARRAY_SIZE(cs4234_default_reg), + .cache_type = REGCACHE_RBTREE, + .use_single_read = true, + .use_single_write = true, +}; + +static const char * const cs4234_core_supplies[] = { + "VA", + "VL", +}; + +static void cs4234_shutdown(struct cs4234 *cs4234) +{ + cancel_delayed_work_sync(&cs4234->vq_ramp_delay); + reinit_completion(&cs4234->vq_ramp_complete); + + regmap_update_bits(cs4234->regmap, CS4234_DAC_CTRL4, CS4234_VQ_RAMP_MASK, + CS4234_VQ_RAMP_MASK); + msleep(50); + regcache_cache_only(cs4234->regmap, true); + /* Clear VQ Ramp Bit in cache for the next PowerUp */ + regmap_update_bits(cs4234->regmap, CS4234_DAC_CTRL4, CS4234_VQ_RAMP_MASK, 0); + gpiod_set_value_cansleep(cs4234->reset_gpio, 0); + regulator_bulk_disable(cs4234->num_core_supplies, cs4234->core_supplies); + clk_disable_unprepare(cs4234->mclk); +} + +static int cs4234_powerup(struct cs4234 *cs4234) +{ + int ret; + + ret = clk_prepare_enable(cs4234->mclk); + if (ret) { + dev_err(cs4234->dev, "Failed to enable mclk: %d\n", ret); + return ret; + } + + ret = regulator_bulk_enable(cs4234->num_core_supplies, cs4234->core_supplies); + if (ret) { + dev_err(cs4234->dev, "Failed to enable core supplies: %d\n", ret); + clk_disable_unprepare(cs4234->mclk); + return ret; + } + + usleep_range(CS4234_HOLD_RESET_TIME_US, 2 * CS4234_HOLD_RESET_TIME_US); + gpiod_set_value_cansleep(cs4234->reset_gpio, 1); + + /* Make sure hardware reset done 2 ms + (3000/MCLK) */ + usleep_range(CS4234_BOOT_TIME_US, CS4234_BOOT_TIME_US * 2); + + queue_delayed_work(system_power_efficient_wq, + &cs4234->vq_ramp_delay, + msecs_to_jiffies(CS4234_VQ_CHARGE_MS)); + + return 0; +} + +static int cs4234_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) +{ + struct cs4234 *cs4234; + struct device *dev = &i2c_client->dev; + unsigned int revid; + uint32_t devid; + uint8_t ids[3]; + int ret = 0, i; + + cs4234 = devm_kzalloc(dev, sizeof(*cs4234), GFP_KERNEL); + if (!cs4234) + return -ENOMEM; + i2c_set_clientdata(i2c_client, cs4234); + cs4234->dev = dev; + init_completion(&cs4234->vq_ramp_complete); + INIT_DELAYED_WORK(&cs4234->vq_ramp_delay, cs4234_vq_ramp_done); + + cs4234->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(cs4234->reset_gpio)) + return PTR_ERR(cs4234->reset_gpio); + + BUILD_BUG_ON(ARRAY_SIZE(cs4234->core_supplies) < ARRAY_SIZE(cs4234_core_supplies)); + + cs4234->num_core_supplies = ARRAY_SIZE(cs4234_core_supplies); + for (i = 0; i < ARRAY_SIZE(cs4234_core_supplies); i++) + cs4234->core_supplies[i].supply = cs4234_core_supplies[i]; + + ret = devm_regulator_bulk_get(dev, cs4234->num_core_supplies, cs4234->core_supplies); + if (ret) { + dev_err(dev, "Failed to request core supplies %d\n", ret); + return ret; + } + + cs4234->mclk = devm_clk_get(dev, "mclk"); + if (IS_ERR(cs4234->mclk)) { + ret = PTR_ERR(cs4234->mclk); + dev_err(dev, "Failed to get the mclk: %d\n", ret); + return ret; + } + cs4234->mclk_rate = clk_get_rate(cs4234->mclk); + + if (cs4234->mclk_rate < 7680000 || cs4234->mclk_rate > 25600000) { + dev_err(dev, "Invalid Master Clock rate\n"); + return -EINVAL; + } + + cs4234->regmap = devm_regmap_init_i2c(i2c_client, &cs4234_regmap); + if (IS_ERR(cs4234->regmap)) { + ret = PTR_ERR(cs4234->regmap); + dev_err(dev, "regmap_init() failed: %d\n", ret); + return ret; + } + + ret = cs4234_powerup(cs4234); + if (ret) + return ret; + + ret = regmap_bulk_read(cs4234->regmap, CS4234_DEVID_AB, ids, ARRAY_SIZE(ids)); + if (ret < 0) { + dev_err(dev, "Failed to read DEVID: %d\n", ret); + goto fail_shutdown; + } + + devid = (ids[0] << 16) | (ids[1] << 8) | ids[2]; + if (devid != CS4234_SUPPORTED_ID) { + dev_err(dev, "Unknown device ID: %x\n", devid); + ret = -EINVAL; + goto fail_shutdown; + } + + ret = regmap_read(cs4234->regmap, CS4234_REVID, &revid); + if (ret < 0) { + dev_err(dev, "Failed to read CS4234_REVID: %d\n", ret); + goto fail_shutdown; + } + + dev_info(dev, "Cirrus Logic CS4234, Alpha Rev: %02X, Numeric Rev: %02X\n", + (revid & 0xF0) >> 4, revid & 0x0F); + + ret = regulator_get_voltage(cs4234->core_supplies[CS4234_SUPPLY_VA].consumer); + switch (ret) { + case 3135000 ... 3650000: + regmap_update_bits(cs4234->regmap, CS4234_ADC_CTRL1, + CS4234_VA_SEL_MASK, + CS4234_3V3 << CS4234_VA_SEL_SHIFT); + break; + case 4750000 ... 5250000: + regmap_update_bits(cs4234->regmap, CS4234_ADC_CTRL1, + CS4234_VA_SEL_MASK, + CS4234_5V << CS4234_VA_SEL_SHIFT); + break; + default: + dev_err(dev, "Invalid VA voltage\n"); + ret = -EINVAL; + goto fail_shutdown; + } + + pm_runtime_set_active(&i2c_client->dev); + pm_runtime_enable(&i2c_client->dev); + + memcpy(&cs4234->rate_dividers, &cs4234_dividers, sizeof(cs4234_dividers)); + cs4234->rate_constraint.rats = cs4234->rate_dividers; + + ret = snd_soc_register_component(dev, &soc_component_cs4234, cs4234_dai, + ARRAY_SIZE(cs4234_dai)); + if (ret < 0) { + dev_err(dev, "Failed to register component:%d\n", ret); + pm_runtime_disable(&i2c_client->dev); + goto fail_shutdown; + } + + return ret; + +fail_shutdown: + cs4234_shutdown(cs4234); + + return ret; +} + +static int cs4234_i2c_remove(struct i2c_client *i2c_client) +{ + struct cs4234 *cs4234 = i2c_get_clientdata(i2c_client); + struct device *dev = &i2c_client->dev; + + snd_soc_unregister_component(dev); + pm_runtime_disable(dev); + cs4234_shutdown(cs4234); + + return 0; +} + +static int __maybe_unused cs4234_runtime_resume(struct device *dev) +{ + struct cs4234 *cs4234 = dev_get_drvdata(dev); + int ret; + + ret = cs4234_powerup(cs4234); + if (ret) + return ret; + + regcache_mark_dirty(cs4234->regmap); + regcache_cache_only(cs4234->regmap, false); + ret = regcache_sync(cs4234->regmap); + if (ret) { + dev_err(dev, "Failed to sync regmap: %d\n", ret); + cs4234_shutdown(cs4234); + return ret; + } + + return 0; +} + +static int __maybe_unused cs4234_runtime_suspend(struct device *dev) +{ + struct cs4234 *cs4234 = dev_get_drvdata(dev); + + cs4234_shutdown(cs4234); + + return 0; +} + +static const struct dev_pm_ops cs4234_pm = { + SET_RUNTIME_PM_OPS(cs4234_runtime_suspend, cs4234_runtime_resume, NULL) +}; + +static const struct of_device_id cs4234_of_match[] = { + { .compatible = "cirrus,cs4234", }, + { } +}; +MODULE_DEVICE_TABLE(of, cs4234_of_match); + +static struct i2c_driver cs4234_i2c_driver = { + .driver = { + .name = "cs4234", + .pm = &cs4234_pm, + .of_match_table = cs4234_of_match, + }, + .probe = cs4234_i2c_probe, + .remove = cs4234_i2c_remove, +}; +module_i2c_driver(cs4234_i2c_driver); + +MODULE_DESCRIPTION("ASoC Cirrus Logic CS4234 driver"); +MODULE_AUTHOR("Lucas Tanure <tanureal@opensource.cirrus.com>"); +MODULE_LICENSE("GPL v2"); |