diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/codecs/pcm512x.c | 1769 |
1 files changed, 1769 insertions, 0 deletions
diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c new file mode 100644 index 000000000..89059a673 --- /dev/null +++ b/sound/soc/codecs/pcm512x.c @@ -0,0 +1,1769 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for the PCM512x CODECs + * + * Author: Mark Brown <broonie@kernel.org> + * Copyright 2014 Linaro Ltd + */ + + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/kernel.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/gcd.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/pcm_params.h> +#include <sound/tlv.h> + +#include "pcm512x.h" + +#define PCM512x_NUM_SUPPLIES 3 +static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = { + "AVDD", + "DVDD", + "CPVDD", +}; + +struct pcm512x_priv { + struct regmap *regmap; + struct clk *sclk; + struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES]; + struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES]; + int fmt; + int pll_in; + int pll_out; + int pll_r; + int pll_j; + int pll_d; + int pll_p; + unsigned long real_pll; + unsigned long overclock_pll; + unsigned long overclock_dac; + unsigned long overclock_dsp; + int mute; + struct mutex mutex; + unsigned int bclk_ratio; +}; + +/* + * We can't use the same notifier block for more than one supply and + * there's no way I can see to get from a callback to the caller + * except container_of(). + */ +#define PCM512x_REGULATOR_EVENT(n) \ +static int pcm512x_regulator_event_##n(struct notifier_block *nb, \ + unsigned long event, void *data) \ +{ \ + struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \ + supply_nb[n]); \ + if (event & REGULATOR_EVENT_DISABLE) { \ + regcache_mark_dirty(pcm512x->regmap); \ + regcache_cache_only(pcm512x->regmap, true); \ + } \ + return 0; \ +} + +PCM512x_REGULATOR_EVENT(0) +PCM512x_REGULATOR_EVENT(1) +PCM512x_REGULATOR_EVENT(2) + +static const struct reg_default pcm512x_reg_defaults[] = { + { PCM512x_RESET, 0x00 }, + { PCM512x_POWER, 0x00 }, + { PCM512x_MUTE, 0x00 }, + { PCM512x_DSP, 0x00 }, + { PCM512x_PLL_REF, 0x00 }, + { PCM512x_DAC_REF, 0x00 }, + { PCM512x_DAC_ROUTING, 0x11 }, + { PCM512x_DSP_PROGRAM, 0x01 }, + { PCM512x_CLKDET, 0x00 }, + { PCM512x_AUTO_MUTE, 0x00 }, + { PCM512x_ERROR_DETECT, 0x00 }, + { PCM512x_DIGITAL_VOLUME_1, 0x00 }, + { PCM512x_DIGITAL_VOLUME_2, 0x30 }, + { PCM512x_DIGITAL_VOLUME_3, 0x30 }, + { PCM512x_DIGITAL_MUTE_1, 0x22 }, + { PCM512x_DIGITAL_MUTE_2, 0x00 }, + { PCM512x_DIGITAL_MUTE_3, 0x07 }, + { PCM512x_OUTPUT_AMPLITUDE, 0x00 }, + { PCM512x_ANALOG_GAIN_CTRL, 0x00 }, + { PCM512x_UNDERVOLTAGE_PROT, 0x00 }, + { PCM512x_ANALOG_MUTE_CTRL, 0x00 }, + { PCM512x_ANALOG_GAIN_BOOST, 0x00 }, + { PCM512x_VCOM_CTRL_1, 0x00 }, + { PCM512x_VCOM_CTRL_2, 0x01 }, + { PCM512x_BCLK_LRCLK_CFG, 0x00 }, + { PCM512x_MASTER_MODE, 0x7c }, + { PCM512x_GPIO_DACIN, 0x00 }, + { PCM512x_GPIO_PLLIN, 0x00 }, + { PCM512x_SYNCHRONIZE, 0x10 }, + { PCM512x_PLL_COEFF_0, 0x00 }, + { PCM512x_PLL_COEFF_1, 0x00 }, + { PCM512x_PLL_COEFF_2, 0x00 }, + { PCM512x_PLL_COEFF_3, 0x00 }, + { PCM512x_PLL_COEFF_4, 0x00 }, + { PCM512x_DSP_CLKDIV, 0x00 }, + { PCM512x_DAC_CLKDIV, 0x00 }, + { PCM512x_NCP_CLKDIV, 0x00 }, + { PCM512x_OSR_CLKDIV, 0x00 }, + { PCM512x_MASTER_CLKDIV_1, 0x00 }, + { PCM512x_MASTER_CLKDIV_2, 0x00 }, + { PCM512x_FS_SPEED_MODE, 0x00 }, + { PCM512x_IDAC_1, 0x01 }, + { PCM512x_IDAC_2, 0x00 }, + { PCM512x_I2S_1, 0x02 }, + { PCM512x_I2S_2, 0x00 }, +}; + +static bool pcm512x_readable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case PCM512x_RESET: + case PCM512x_POWER: + case PCM512x_MUTE: + case PCM512x_PLL_EN: + case PCM512x_SPI_MISO_FUNCTION: + case PCM512x_DSP: + case PCM512x_GPIO_EN: + case PCM512x_BCLK_LRCLK_CFG: + case PCM512x_DSP_GPIO_INPUT: + case PCM512x_MASTER_MODE: + case PCM512x_PLL_REF: + case PCM512x_DAC_REF: + case PCM512x_GPIO_DACIN: + case PCM512x_GPIO_PLLIN: + case PCM512x_SYNCHRONIZE: + case PCM512x_PLL_COEFF_0: + case PCM512x_PLL_COEFF_1: + case PCM512x_PLL_COEFF_2: + case PCM512x_PLL_COEFF_3: + case PCM512x_PLL_COEFF_4: + case PCM512x_DSP_CLKDIV: + case PCM512x_DAC_CLKDIV: + case PCM512x_NCP_CLKDIV: + case PCM512x_OSR_CLKDIV: + case PCM512x_MASTER_CLKDIV_1: + case PCM512x_MASTER_CLKDIV_2: + case PCM512x_FS_SPEED_MODE: + case PCM512x_IDAC_1: + case PCM512x_IDAC_2: + case PCM512x_ERROR_DETECT: + case PCM512x_I2S_1: + case PCM512x_I2S_2: + case PCM512x_DAC_ROUTING: + case PCM512x_DSP_PROGRAM: + case PCM512x_CLKDET: + case PCM512x_AUTO_MUTE: + case PCM512x_DIGITAL_VOLUME_1: + case PCM512x_DIGITAL_VOLUME_2: + case PCM512x_DIGITAL_VOLUME_3: + case PCM512x_DIGITAL_MUTE_1: + case PCM512x_DIGITAL_MUTE_2: + case PCM512x_DIGITAL_MUTE_3: + case PCM512x_GPIO_OUTPUT_1: + case PCM512x_GPIO_OUTPUT_2: + case PCM512x_GPIO_OUTPUT_3: + case PCM512x_GPIO_OUTPUT_4: + case PCM512x_GPIO_OUTPUT_5: + case PCM512x_GPIO_OUTPUT_6: + case PCM512x_GPIO_CONTROL_1: + case PCM512x_GPIO_CONTROL_2: + case PCM512x_OVERFLOW: + case PCM512x_RATE_DET_1: + case PCM512x_RATE_DET_2: + case PCM512x_RATE_DET_3: + case PCM512x_RATE_DET_4: + case PCM512x_CLOCK_STATUS: + case PCM512x_ANALOG_MUTE_DET: + case PCM512x_GPIN: + case PCM512x_DIGITAL_MUTE_DET: + case PCM512x_OUTPUT_AMPLITUDE: + case PCM512x_ANALOG_GAIN_CTRL: + case PCM512x_UNDERVOLTAGE_PROT: + case PCM512x_ANALOG_MUTE_CTRL: + case PCM512x_ANALOG_GAIN_BOOST: + case PCM512x_VCOM_CTRL_1: + case PCM512x_VCOM_CTRL_2: + case PCM512x_CRAM_CTRL: + case PCM512x_FLEX_A: + case PCM512x_FLEX_B: + return true; + default: + /* There are 256 raw register addresses */ + return reg < 0xff; + } +} + +static bool pcm512x_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case PCM512x_PLL_EN: + case PCM512x_OVERFLOW: + case PCM512x_RATE_DET_1: + case PCM512x_RATE_DET_2: + case PCM512x_RATE_DET_3: + case PCM512x_RATE_DET_4: + case PCM512x_CLOCK_STATUS: + case PCM512x_ANALOG_MUTE_DET: + case PCM512x_GPIN: + case PCM512x_DIGITAL_MUTE_DET: + case PCM512x_CRAM_CTRL: + return true; + default: + /* There are 256 raw register addresses */ + return reg < 0xff; + } +} + +static int pcm512x_overclock_pll_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + ucontrol->value.integer.value[0] = pcm512x->overclock_pll; + return 0; +} + +static int pcm512x_overclock_pll_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + switch (snd_soc_component_get_bias_level(component)) { + case SND_SOC_BIAS_OFF: + case SND_SOC_BIAS_STANDBY: + break; + default: + return -EBUSY; + } + + pcm512x->overclock_pll = ucontrol->value.integer.value[0]; + return 0; +} + +static int pcm512x_overclock_dsp_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + ucontrol->value.integer.value[0] = pcm512x->overclock_dsp; + return 0; +} + +static int pcm512x_overclock_dsp_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + switch (snd_soc_component_get_bias_level(component)) { + case SND_SOC_BIAS_OFF: + case SND_SOC_BIAS_STANDBY: + break; + default: + return -EBUSY; + } + + pcm512x->overclock_dsp = ucontrol->value.integer.value[0]; + return 0; +} + +static int pcm512x_overclock_dac_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + ucontrol->value.integer.value[0] = pcm512x->overclock_dac; + return 0; +} + +static int pcm512x_overclock_dac_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + switch (snd_soc_component_get_bias_level(component)) { + case SND_SOC_BIAS_OFF: + case SND_SOC_BIAS_STANDBY: + break; + default: + return -EBUSY; + } + + pcm512x->overclock_dac = ucontrol->value.integer.value[0]; + return 0; +} + +static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1); +static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0); +static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0); + +static const char * const pcm512x_dsp_program_texts[] = { + "FIR interpolation with de-emphasis", + "Low latency IIR with de-emphasis", + "High attenuation with de-emphasis", + "Fixed process flow", + "Ringing-less low latency FIR", +}; + +static const unsigned int pcm512x_dsp_program_values[] = { + 1, + 2, + 3, + 5, + 7, +}; + +static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program, + PCM512x_DSP_PROGRAM, 0, 0x1f, + pcm512x_dsp_program_texts, + pcm512x_dsp_program_values); + +static const char * const pcm512x_clk_missing_text[] = { + "1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s" +}; + +static const struct soc_enum pcm512x_clk_missing = + SOC_ENUM_SINGLE(PCM512x_CLKDET, 0, 8, pcm512x_clk_missing_text); + +static const char * const pcm512x_autom_text[] = { + "21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s" +}; + +static const struct soc_enum pcm512x_autom_l = + SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8, + pcm512x_autom_text); + +static const struct soc_enum pcm512x_autom_r = + SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8, + pcm512x_autom_text); + +static const char * const pcm512x_ramp_rate_text[] = { + "1 sample/update", "2 samples/update", "4 samples/update", + "Immediate" +}; + +static const struct soc_enum pcm512x_vndf = + SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4, + pcm512x_ramp_rate_text); + +static const struct soc_enum pcm512x_vnuf = + SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4, + pcm512x_ramp_rate_text); + +static const struct soc_enum pcm512x_vedf = + SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4, + pcm512x_ramp_rate_text); + +static const char * const pcm512x_ramp_step_text[] = { + "4dB/step", "2dB/step", "1dB/step", "0.5dB/step" +}; + +static const struct soc_enum pcm512x_vnds = + SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4, + pcm512x_ramp_step_text); + +static const struct soc_enum pcm512x_vnus = + SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4, + pcm512x_ramp_step_text); + +static const struct soc_enum pcm512x_veds = + SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4, + pcm512x_ramp_step_text); + +static int pcm512x_update_mute(struct pcm512x_priv *pcm512x) +{ + return regmap_update_bits( + pcm512x->regmap, PCM512x_MUTE, PCM512x_RQML | PCM512x_RQMR, + (!!(pcm512x->mute & 0x5) << PCM512x_RQML_SHIFT) + | (!!(pcm512x->mute & 0x3) << PCM512x_RQMR_SHIFT)); +} + +static int pcm512x_digital_playback_switch_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + mutex_lock(&pcm512x->mutex); + ucontrol->value.integer.value[0] = !(pcm512x->mute & 0x4); + ucontrol->value.integer.value[1] = !(pcm512x->mute & 0x2); + mutex_unlock(&pcm512x->mutex); + + return 0; +} + +static int pcm512x_digital_playback_switch_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + int ret, changed = 0; + + mutex_lock(&pcm512x->mutex); + + if ((pcm512x->mute & 0x4) == (ucontrol->value.integer.value[0] << 2)) { + pcm512x->mute ^= 0x4; + changed = 1; + } + if ((pcm512x->mute & 0x2) == (ucontrol->value.integer.value[1] << 1)) { + pcm512x->mute ^= 0x2; + changed = 1; + } + + if (changed) { + ret = pcm512x_update_mute(pcm512x); + if (ret != 0) { + dev_err(component->dev, + "Failed to update digital mute: %d\n", ret); + mutex_unlock(&pcm512x->mutex); + return ret; + } + } + + mutex_unlock(&pcm512x->mutex); + + return changed; +} + +static const struct snd_kcontrol_new pcm512x_controls[] = { +SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2, + PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv), +SOC_DOUBLE_TLV("Analogue Playback Volume", PCM512x_ANALOG_GAIN_CTRL, + PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv), +SOC_DOUBLE_TLV("Analogue Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST, + PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv), +{ + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Digital Playback Switch", + .index = 0, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = snd_ctl_boolean_stereo_info, + .get = pcm512x_digital_playback_switch_get, + .put = pcm512x_digital_playback_switch_put +}, + +SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1), +SOC_ENUM("DSP Program", pcm512x_dsp_program), + +SOC_ENUM("Clock Missing Period", pcm512x_clk_missing), +SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l), +SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r), +SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3, + PCM512x_ACTL_SHIFT, 1, 0), +SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT, + PCM512x_AMRE_SHIFT, 1, 0), + +SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf), +SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds), +SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf), +SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus), +SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf), +SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds), + +SOC_SINGLE_EXT("Max Overclock PLL", SND_SOC_NOPM, 0, 20, 0, + pcm512x_overclock_pll_get, pcm512x_overclock_pll_put), +SOC_SINGLE_EXT("Max Overclock DSP", SND_SOC_NOPM, 0, 40, 0, + pcm512x_overclock_dsp_get, pcm512x_overclock_dsp_put), +SOC_SINGLE_EXT("Max Overclock DAC", SND_SOC_NOPM, 0, 40, 0, + pcm512x_overclock_dac_get, pcm512x_overclock_dac_put), +}; + +static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = { +SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0), +SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0), + +SND_SOC_DAPM_OUTPUT("OUTL"), +SND_SOC_DAPM_OUTPUT("OUTR"), +}; + +static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = { + { "DACL", NULL, "Playback" }, + { "DACR", NULL, "Playback" }, + + { "OUTL", NULL, "DACL" }, + { "OUTR", NULL, "DACR" }, +}; + +static unsigned long pcm512x_pll_max(struct pcm512x_priv *pcm512x) +{ + return 25000000 + 25000000 * pcm512x->overclock_pll / 100; +} + +static unsigned long pcm512x_dsp_max(struct pcm512x_priv *pcm512x) +{ + return 50000000 + 50000000 * pcm512x->overclock_dsp / 100; +} + +static unsigned long pcm512x_dac_max(struct pcm512x_priv *pcm512x, + unsigned long rate) +{ + return rate + rate * pcm512x->overclock_dac / 100; +} + +static unsigned long pcm512x_sck_max(struct pcm512x_priv *pcm512x) +{ + if (!pcm512x->pll_out) + return 25000000; + return pcm512x_pll_max(pcm512x); +} + +static unsigned long pcm512x_ncp_target(struct pcm512x_priv *pcm512x, + unsigned long dac_rate) +{ + /* + * If the DAC is not actually overclocked, use the good old + * NCP target rate... + */ + if (dac_rate <= 6144000) + return 1536000; + /* + * ...but if the DAC is in fact overclocked, bump the NCP target + * rate to get the recommended dividers even when overclocking. + */ + return pcm512x_dac_max(pcm512x, 1536000); +} + +static const u32 pcm512x_dai_rates[] = { + 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, + 88200, 96000, 176400, 192000, 384000, +}; + +static const struct snd_pcm_hw_constraint_list constraints_slave = { + .count = ARRAY_SIZE(pcm512x_dai_rates), + .list = pcm512x_dai_rates, +}; + +static int pcm512x_hw_rule_rate(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + struct pcm512x_priv *pcm512x = rule->private; + struct snd_interval ranges[2]; + int frame_size; + + frame_size = snd_soc_params_to_frame_size(params); + if (frame_size < 0) + return frame_size; + + switch (frame_size) { + case 32: + /* No hole when the frame size is 32. */ + return 0; + case 48: + case 64: + /* There is only one hole in the range of supported + * rates, but it moves with the frame size. + */ + memset(ranges, 0, sizeof(ranges)); + ranges[0].min = 8000; + ranges[0].max = pcm512x_sck_max(pcm512x) / frame_size / 2; + ranges[1].min = DIV_ROUND_UP(16000000, frame_size); + ranges[1].max = 384000; + break; + default: + return -EINVAL; + } + + return snd_interval_ranges(hw_param_interval(params, rule->var), + ARRAY_SIZE(ranges), ranges, 0); +} + +static int pcm512x_dai_startup_master(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + struct device *dev = dai->dev; + struct snd_pcm_hw_constraint_ratnums *constraints_no_pll; + struct snd_ratnum *rats_no_pll; + + if (IS_ERR(pcm512x->sclk)) { + dev_err(dev, "Need SCLK for master mode: %ld\n", + PTR_ERR(pcm512x->sclk)); + return PTR_ERR(pcm512x->sclk); + } + + if (pcm512x->pll_out) + return snd_pcm_hw_rule_add(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + pcm512x_hw_rule_rate, + pcm512x, + SNDRV_PCM_HW_PARAM_FRAME_BITS, + SNDRV_PCM_HW_PARAM_CHANNELS, -1); + + constraints_no_pll = devm_kzalloc(dev, sizeof(*constraints_no_pll), + GFP_KERNEL); + if (!constraints_no_pll) + return -ENOMEM; + constraints_no_pll->nrats = 1; + rats_no_pll = devm_kzalloc(dev, sizeof(*rats_no_pll), GFP_KERNEL); + if (!rats_no_pll) + return -ENOMEM; + constraints_no_pll->rats = rats_no_pll; + rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64; + rats_no_pll->den_min = 1; + rats_no_pll->den_max = 128; + rats_no_pll->den_step = 1; + + return snd_pcm_hw_constraint_ratnums(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + constraints_no_pll); +} + +static int pcm512x_dai_startup_slave(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + struct device *dev = dai->dev; + struct regmap *regmap = pcm512x->regmap; + + if (IS_ERR(pcm512x->sclk)) { + dev_info(dev, "No SCLK, using BCLK: %ld\n", + PTR_ERR(pcm512x->sclk)); + + /* Disable reporting of missing SCLK as an error */ + regmap_update_bits(regmap, PCM512x_ERROR_DETECT, + PCM512x_IDCH, PCM512x_IDCH); + + /* Switch PLL input to BCLK */ + regmap_update_bits(regmap, PCM512x_PLL_REF, + PCM512x_SREF, PCM512x_SREF_BCK); + } + + return snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + &constraints_slave); +} + +static int pcm512x_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + switch (pcm512x->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_CBP_CFP: + case SND_SOC_DAIFMT_CBP_CFC: + return pcm512x_dai_startup_master(substream, dai); + + case SND_SOC_DAIFMT_CBC_CFC: + return pcm512x_dai_startup_slave(substream, dai); + + default: + return -EINVAL; + } +} + +static int pcm512x_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + struct pcm512x_priv *pcm512x = dev_get_drvdata(component->dev); + int ret; + + switch (level) { + case SND_SOC_BIAS_ON: + case SND_SOC_BIAS_PREPARE: + break; + + case SND_SOC_BIAS_STANDBY: + ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, + PCM512x_RQST, 0); + if (ret != 0) { + dev_err(component->dev, "Failed to remove standby: %d\n", + ret); + return ret; + } + break; + + case SND_SOC_BIAS_OFF: + ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, + PCM512x_RQST, PCM512x_RQST); + if (ret != 0) { + dev_err(component->dev, "Failed to request standby: %d\n", + ret); + return ret; + } + break; + } + + return 0; +} + +static unsigned long pcm512x_find_sck(struct snd_soc_dai *dai, + unsigned long bclk_rate) +{ + struct device *dev = dai->dev; + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + unsigned long sck_rate; + int pow2; + + /* 64 MHz <= pll_rate <= 100 MHz, VREF mode */ + /* 16 MHz <= sck_rate <= 25 MHz, VREF mode */ + + /* select sck_rate as a multiple of bclk_rate but still with + * as many factors of 2 as possible, as that makes it easier + * to find a fast DAC rate + */ + pow2 = 1 << fls((pcm512x_pll_max(pcm512x) - 16000000) / bclk_rate); + for (; pow2; pow2 >>= 1) { + sck_rate = rounddown(pcm512x_pll_max(pcm512x), + bclk_rate * pow2); + if (sck_rate >= 16000000) + break; + } + if (!pow2) { + dev_err(dev, "Impossible to generate a suitable SCK\n"); + return 0; + } + + dev_dbg(dev, "sck_rate %lu\n", sck_rate); + return sck_rate; +} + +/* pll_rate = pllin_rate * R * J.D / P + * 1 <= R <= 16 + * 1 <= J <= 63 + * 0 <= D <= 9999 + * 1 <= P <= 15 + * 64 MHz <= pll_rate <= 100 MHz + * if D == 0 + * 1 MHz <= pllin_rate / P <= 20 MHz + * else if D > 0 + * 6.667 MHz <= pllin_rate / P <= 20 MHz + * 4 <= J <= 11 + * R = 1 + */ +static int pcm512x_find_pll_coeff(struct snd_soc_dai *dai, + unsigned long pllin_rate, + unsigned long pll_rate) +{ + struct device *dev = dai->dev; + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + unsigned long common; + int R, J, D, P; + unsigned long K; /* 10000 * J.D */ + unsigned long num; + unsigned long den; + + common = gcd(pll_rate, pllin_rate); + dev_dbg(dev, "pll %lu pllin %lu common %lu\n", + pll_rate, pllin_rate, common); + num = pll_rate / common; + den = pllin_rate / common; + + /* pllin_rate / P (or here, den) cannot be greater than 20 MHz */ + if (pllin_rate / den > 20000000 && num < 8) { + num *= DIV_ROUND_UP(pllin_rate / den, 20000000); + den *= DIV_ROUND_UP(pllin_rate / den, 20000000); + } + dev_dbg(dev, "num / den = %lu / %lu\n", num, den); + + P = den; + if (den <= 15 && num <= 16 * 63 + && 1000000 <= pllin_rate / P && pllin_rate / P <= 20000000) { + /* Try the case with D = 0 */ + D = 0; + /* factor 'num' into J and R, such that R <= 16 and J <= 63 */ + for (R = 16; R; R--) { + if (num % R) + continue; + J = num / R; + if (J == 0 || J > 63) + continue; + + dev_dbg(dev, "R * J / P = %d * %d / %d\n", R, J, P); + pcm512x->real_pll = pll_rate; + goto done; + } + /* no luck */ + } + + R = 1; + + if (num > 0xffffffffUL / 10000) + goto fallback; + + /* Try to find an exact pll_rate using the D > 0 case */ + common = gcd(10000 * num, den); + num = 10000 * num / common; + den /= common; + dev_dbg(dev, "num %lu den %lu common %lu\n", num, den, common); + + for (P = den; P <= 15; P++) { + if (pllin_rate / P < 6667000 || 200000000 < pllin_rate / P) + continue; + if (num * P % den) + continue; + K = num * P / den; + /* J == 12 is ok if D == 0 */ + if (K < 40000 || K > 120000) + continue; + + J = K / 10000; + D = K % 10000; + dev_dbg(dev, "J.D / P = %d.%04d / %d\n", J, D, P); + pcm512x->real_pll = pll_rate; + goto done; + } + + /* Fall back to an approximate pll_rate */ + +fallback: + /* find smallest possible P */ + P = DIV_ROUND_UP(pllin_rate, 20000000); + if (!P) + P = 1; + else if (P > 15) { + dev_err(dev, "Need a slower clock as pll-input\n"); + return -EINVAL; + } + if (pllin_rate / P < 6667000) { + dev_err(dev, "Need a faster clock as pll-input\n"); + return -EINVAL; + } + K = DIV_ROUND_CLOSEST_ULL(10000ULL * pll_rate * P, pllin_rate); + if (K < 40000) + K = 40000; + /* J == 12 is ok if D == 0 */ + if (K > 120000) + K = 120000; + J = K / 10000; + D = K % 10000; + dev_dbg(dev, "J.D / P ~ %d.%04d / %d\n", J, D, P); + pcm512x->real_pll = DIV_ROUND_DOWN_ULL((u64)K * pllin_rate, 10000 * P); + +done: + pcm512x->pll_r = R; + pcm512x->pll_j = J; + pcm512x->pll_d = D; + pcm512x->pll_p = P; + return 0; +} + +static unsigned long pcm512x_pllin_dac_rate(struct snd_soc_dai *dai, + unsigned long osr_rate, + unsigned long pllin_rate) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + unsigned long dac_rate; + + if (!pcm512x->pll_out) + return 0; /* no PLL to bypass, force SCK as DAC input */ + + if (pllin_rate % osr_rate) + return 0; /* futile, quit early */ + + /* run DAC no faster than 6144000 Hz */ + for (dac_rate = rounddown(pcm512x_dac_max(pcm512x, 6144000), osr_rate); + dac_rate; + dac_rate -= osr_rate) { + + if (pllin_rate / dac_rate > 128) + return 0; /* DAC divider would be too big */ + + if (!(pllin_rate % dac_rate)) + return dac_rate; + + dac_rate -= osr_rate; + } + + return 0; +} + +static int pcm512x_set_dividers(struct snd_soc_dai *dai, + struct snd_pcm_hw_params *params) +{ + struct device *dev = dai->dev; + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + unsigned long pllin_rate = 0; + unsigned long pll_rate; + unsigned long sck_rate; + unsigned long mck_rate; + unsigned long bclk_rate; + unsigned long sample_rate; + unsigned long osr_rate; + unsigned long dacsrc_rate; + int bclk_div; + int lrclk_div; + int dsp_div; + int dac_div; + unsigned long dac_rate; + int ncp_div; + int osr_div; + int ret; + int idac; + int fssp; + int gpio; + + if (pcm512x->bclk_ratio > 0) { + lrclk_div = pcm512x->bclk_ratio; + } else { + lrclk_div = snd_soc_params_to_frame_size(params); + + if (lrclk_div == 0) { + dev_err(dev, "No LRCLK?\n"); + return -EINVAL; + } + } + + if (!pcm512x->pll_out) { + sck_rate = clk_get_rate(pcm512x->sclk); + bclk_rate = params_rate(params) * lrclk_div; + bclk_div = DIV_ROUND_CLOSEST(sck_rate, bclk_rate); + + mck_rate = sck_rate; + } else { + ret = snd_soc_params_to_bclk(params); + if (ret < 0) { + dev_err(dev, "Failed to find suitable BCLK: %d\n", ret); + return ret; + } + if (ret == 0) { + dev_err(dev, "No BCLK?\n"); + return -EINVAL; + } + bclk_rate = ret; + + pllin_rate = clk_get_rate(pcm512x->sclk); + + sck_rate = pcm512x_find_sck(dai, bclk_rate); + if (!sck_rate) + return -EINVAL; + pll_rate = 4 * sck_rate; + + ret = pcm512x_find_pll_coeff(dai, pllin_rate, pll_rate); + if (ret != 0) + return ret; + + ret = regmap_write(pcm512x->regmap, + PCM512x_PLL_COEFF_0, pcm512x->pll_p - 1); + if (ret != 0) { + dev_err(dev, "Failed to write PLL P: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, + PCM512x_PLL_COEFF_1, pcm512x->pll_j); + if (ret != 0) { + dev_err(dev, "Failed to write PLL J: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, + PCM512x_PLL_COEFF_2, pcm512x->pll_d >> 8); + if (ret != 0) { + dev_err(dev, "Failed to write PLL D msb: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, + PCM512x_PLL_COEFF_3, pcm512x->pll_d & 0xff); + if (ret != 0) { + dev_err(dev, "Failed to write PLL D lsb: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, + PCM512x_PLL_COEFF_4, pcm512x->pll_r - 1); + if (ret != 0) { + dev_err(dev, "Failed to write PLL R: %d\n", ret); + return ret; + } + + mck_rate = pcm512x->real_pll; + + bclk_div = DIV_ROUND_CLOSEST(sck_rate, bclk_rate); + } + + if (bclk_div > 128) { + dev_err(dev, "Failed to find BCLK divider\n"); + return -EINVAL; + } + + /* the actual rate */ + sample_rate = sck_rate / bclk_div / lrclk_div; + osr_rate = 16 * sample_rate; + + /* run DSP no faster than 50 MHz */ + dsp_div = mck_rate > pcm512x_dsp_max(pcm512x) ? 2 : 1; + + dac_rate = pcm512x_pllin_dac_rate(dai, osr_rate, pllin_rate); + if (dac_rate) { + /* the desired clock rate is "compatible" with the pll input + * clock, so use that clock as dac input instead of the pll + * output clock since the pll will introduce jitter and thus + * noise. + */ + dev_dbg(dev, "using pll input as dac input\n"); + ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF, + PCM512x_SDAC, PCM512x_SDAC_GPIO); + if (ret != 0) { + dev_err(component->dev, + "Failed to set gpio as dacref: %d\n", ret); + return ret; + } + + gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1; + ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_DACIN, + PCM512x_GREF, gpio); + if (ret != 0) { + dev_err(component->dev, + "Failed to set gpio %d as dacin: %d\n", + pcm512x->pll_in, ret); + return ret; + } + + dacsrc_rate = pllin_rate; + } else { + /* run DAC no faster than 6144000 Hz */ + unsigned long dac_mul = pcm512x_dac_max(pcm512x, 6144000) + / osr_rate; + unsigned long sck_mul = sck_rate / osr_rate; + + for (; dac_mul; dac_mul--) { + if (!(sck_mul % dac_mul)) + break; + } + if (!dac_mul) { + dev_err(dev, "Failed to find DAC rate\n"); + return -EINVAL; + } + + dac_rate = dac_mul * osr_rate; + dev_dbg(dev, "dac_rate %lu sample_rate %lu\n", + dac_rate, sample_rate); + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF, + PCM512x_SDAC, PCM512x_SDAC_SCK); + if (ret != 0) { + dev_err(component->dev, + "Failed to set sck as dacref: %d\n", ret); + return ret; + } + + dacsrc_rate = sck_rate; + } + + osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate); + if (osr_div > 128) { + dev_err(dev, "Failed to find OSR divider\n"); + return -EINVAL; + } + + dac_div = DIV_ROUND_CLOSEST(dacsrc_rate, dac_rate); + if (dac_div > 128) { + dev_err(dev, "Failed to find DAC divider\n"); + return -EINVAL; + } + dac_rate = dacsrc_rate / dac_div; + + ncp_div = DIV_ROUND_CLOSEST(dac_rate, + pcm512x_ncp_target(pcm512x, dac_rate)); + if (ncp_div > 128 || dac_rate / ncp_div > 2048000) { + /* run NCP no faster than 2048000 Hz, but why? */ + ncp_div = DIV_ROUND_UP(dac_rate, 2048000); + if (ncp_div > 128) { + dev_err(dev, "Failed to find NCP divider\n"); + return -EINVAL; + } + } + + idac = mck_rate / (dsp_div * sample_rate); + + ret = regmap_write(pcm512x->regmap, PCM512x_DSP_CLKDIV, dsp_div - 1); + if (ret != 0) { + dev_err(dev, "Failed to write DSP divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, PCM512x_DAC_CLKDIV, dac_div - 1); + if (ret != 0) { + dev_err(dev, "Failed to write DAC divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, PCM512x_NCP_CLKDIV, ncp_div - 1); + if (ret != 0) { + dev_err(dev, "Failed to write NCP divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, PCM512x_OSR_CLKDIV, osr_div - 1); + if (ret != 0) { + dev_err(dev, "Failed to write OSR divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, + PCM512x_MASTER_CLKDIV_1, bclk_div - 1); + if (ret != 0) { + dev_err(dev, "Failed to write BCLK divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, + PCM512x_MASTER_CLKDIV_2, lrclk_div - 1); + if (ret != 0) { + dev_err(dev, "Failed to write LRCLK divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_1, idac >> 8); + if (ret != 0) { + dev_err(dev, "Failed to write IDAC msb divider: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_2, idac & 0xff); + if (ret != 0) { + dev_err(dev, "Failed to write IDAC lsb divider: %d\n", ret); + return ret; + } + + if (sample_rate <= pcm512x_dac_max(pcm512x, 48000)) + fssp = PCM512x_FSSP_48KHZ; + else if (sample_rate <= pcm512x_dac_max(pcm512x, 96000)) + fssp = PCM512x_FSSP_96KHZ; + else if (sample_rate <= pcm512x_dac_max(pcm512x, 192000)) + fssp = PCM512x_FSSP_192KHZ; + else + fssp = PCM512x_FSSP_384KHZ; + ret = regmap_update_bits(pcm512x->regmap, PCM512x_FS_SPEED_MODE, + PCM512x_FSSP, fssp); + if (ret != 0) { + dev_err(component->dev, "Failed to set fs speed: %d\n", ret); + return ret; + } + + dev_dbg(component->dev, "DSP divider %d\n", dsp_div); + dev_dbg(component->dev, "DAC divider %d\n", dac_div); + dev_dbg(component->dev, "NCP divider %d\n", ncp_div); + dev_dbg(component->dev, "OSR divider %d\n", osr_div); + dev_dbg(component->dev, "BCK divider %d\n", bclk_div); + dev_dbg(component->dev, "LRCK divider %d\n", lrclk_div); + dev_dbg(component->dev, "IDAC %d\n", idac); + dev_dbg(component->dev, "1<<FSSP %d\n", 1 << fssp); + + return 0; +} + +static int pcm512x_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + int alen; + int gpio; + int ret; + + dev_dbg(component->dev, "hw_params %u Hz, %u channels\n", + params_rate(params), + params_channels(params)); + + switch (params_width(params)) { + case 16: + alen = PCM512x_ALEN_16; + break; + case 20: + alen = PCM512x_ALEN_20; + break; + case 24: + alen = PCM512x_ALEN_24; + break; + case 32: + alen = PCM512x_ALEN_32; + break; + default: + dev_err(component->dev, "Bad frame size: %d\n", + params_width(params)); + return -EINVAL; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1, + PCM512x_ALEN, alen); + if (ret != 0) { + dev_err(component->dev, "Failed to set frame size: %d\n", ret); + return ret; + } + + if ((pcm512x->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) == + SND_SOC_DAIFMT_CBC_CFC) { + ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT, + PCM512x_DCAS, 0); + if (ret != 0) { + dev_err(component->dev, + "Failed to enable clock divider autoset: %d\n", + ret); + return ret; + } + goto skip_pll; + } + + if (pcm512x->pll_out) { + ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_A, 0x11); + if (ret != 0) { + dev_err(component->dev, "Failed to set FLEX_A: %d\n", ret); + return ret; + } + + ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_B, 0xff); + if (ret != 0) { + dev_err(component->dev, "Failed to set FLEX_B: %d\n", ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT, + PCM512x_IDFS | PCM512x_IDBK + | PCM512x_IDSK | PCM512x_IDCH + | PCM512x_IDCM | PCM512x_DCAS + | PCM512x_IPLK, + PCM512x_IDFS | PCM512x_IDBK + | PCM512x_IDSK | PCM512x_IDCH + | PCM512x_DCAS); + if (ret != 0) { + dev_err(component->dev, + "Failed to ignore auto-clock failures: %d\n", + ret); + return ret; + } + } else { + ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT, + PCM512x_IDFS | PCM512x_IDBK + | PCM512x_IDSK | PCM512x_IDCH + | PCM512x_IDCM | PCM512x_DCAS + | PCM512x_IPLK, + PCM512x_IDFS | PCM512x_IDBK + | PCM512x_IDSK | PCM512x_IDCH + | PCM512x_DCAS | PCM512x_IPLK); + if (ret != 0) { + dev_err(component->dev, + "Failed to ignore auto-clock failures: %d\n", + ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN, + PCM512x_PLLE, 0); + if (ret != 0) { + dev_err(component->dev, "Failed to disable pll: %d\n", ret); + return ret; + } + } + + ret = pcm512x_set_dividers(dai, params); + if (ret != 0) + return ret; + + if (pcm512x->pll_out) { + ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_REF, + PCM512x_SREF, PCM512x_SREF_GPIO); + if (ret != 0) { + dev_err(component->dev, + "Failed to set gpio as pllref: %d\n", ret); + return ret; + } + + gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1; + ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_PLLIN, + PCM512x_GREF, gpio); + if (ret != 0) { + dev_err(component->dev, + "Failed to set gpio %d as pllin: %d\n", + pcm512x->pll_in, ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN, + PCM512x_PLLE, PCM512x_PLLE); + if (ret != 0) { + dev_err(component->dev, "Failed to enable pll: %d\n", ret); + return ret; + } + + gpio = PCM512x_G1OE << (pcm512x->pll_out - 1); + ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_EN, + gpio, gpio); + if (ret != 0) { + dev_err(component->dev, "Failed to enable gpio %d: %d\n", + pcm512x->pll_out, ret); + return ret; + } + + gpio = PCM512x_GPIO_OUTPUT_1 + pcm512x->pll_out - 1; + ret = regmap_update_bits(pcm512x->regmap, gpio, + PCM512x_GxSL, PCM512x_GxSL_PLLCK); + if (ret != 0) { + dev_err(component->dev, "Failed to output pll on %d: %d\n", + ret, pcm512x->pll_out); + return ret; + } + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE, + PCM512x_RQSY, PCM512x_RQSY_HALT); + if (ret != 0) { + dev_err(component->dev, "Failed to halt clocks: %d\n", ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE, + PCM512x_RQSY, PCM512x_RQSY_RESUME); + if (ret != 0) { + dev_err(component->dev, "Failed to resume clocks: %d\n", ret); + return ret; + } + +skip_pll: + return 0; +} + +static int pcm512x_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + int afmt; + int offset = 0; + int clock_output; + int provider_mode; + int ret; + + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_CBC_CFC: + clock_output = 0; + provider_mode = 0; + break; + case SND_SOC_DAIFMT_CBP_CFP: + clock_output = PCM512x_BCKO | PCM512x_LRKO; + provider_mode = PCM512x_RLRK | PCM512x_RBCK; + break; + case SND_SOC_DAIFMT_CBP_CFC: + clock_output = PCM512x_BCKO; + provider_mode = PCM512x_RBCK; + break; + default: + return -EINVAL; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_BCLK_LRCLK_CFG, + PCM512x_BCKP | PCM512x_BCKO | PCM512x_LRKO, + clock_output); + if (ret != 0) { + dev_err(component->dev, "Failed to enable clock output: %d\n", ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_MASTER_MODE, + PCM512x_RLRK | PCM512x_RBCK, + provider_mode); + if (ret != 0) { + dev_err(component->dev, "Failed to enable provider mode: %d\n", ret); + return ret; + } + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + afmt = PCM512x_AFMT_I2S; + break; + case SND_SOC_DAIFMT_RIGHT_J: + afmt = PCM512x_AFMT_RTJ; + break; + case SND_SOC_DAIFMT_LEFT_J: + afmt = PCM512x_AFMT_LTJ; + break; + case SND_SOC_DAIFMT_DSP_A: + offset = 1; + fallthrough; + case SND_SOC_DAIFMT_DSP_B: + afmt = PCM512x_AFMT_DSP; + break; + default: + dev_err(component->dev, "unsupported DAI format: 0x%x\n", + pcm512x->fmt); + return -EINVAL; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1, + PCM512x_AFMT, afmt); + if (ret != 0) { + dev_err(component->dev, "Failed to set data format: %d\n", ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_2, + 0xFF, offset); + if (ret != 0) { + dev_err(component->dev, "Failed to set data offset: %d\n", ret); + return ret; + } + + pcm512x->fmt = fmt; + + return 0; +} + +static int pcm512x_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + + if (ratio > 256) + return -EINVAL; + + pcm512x->bclk_ratio = ratio; + + return 0; +} + +static int pcm512x_mute(struct snd_soc_dai *dai, int mute, int direction) +{ + struct snd_soc_component *component = dai->component; + struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); + int ret; + unsigned int mute_det; + + mutex_lock(&pcm512x->mutex); + + if (mute) { + pcm512x->mute |= 0x1; + ret = regmap_update_bits(pcm512x->regmap, PCM512x_MUTE, + PCM512x_RQML | PCM512x_RQMR, + PCM512x_RQML | PCM512x_RQMR); + if (ret != 0) { + dev_err(component->dev, + "Failed to set digital mute: %d\n", ret); + goto unlock; + } + + regmap_read_poll_timeout(pcm512x->regmap, + PCM512x_ANALOG_MUTE_DET, + mute_det, (mute_det & 0x3) == 0, + 200, 10000); + } else { + pcm512x->mute &= ~0x1; + ret = pcm512x_update_mute(pcm512x); + if (ret != 0) { + dev_err(component->dev, + "Failed to update digital mute: %d\n", ret); + goto unlock; + } + + regmap_read_poll_timeout(pcm512x->regmap, + PCM512x_ANALOG_MUTE_DET, + mute_det, + (mute_det & 0x3) + == ((~pcm512x->mute >> 1) & 0x3), + 200, 10000); + } + +unlock: + mutex_unlock(&pcm512x->mutex); + + return ret; +} + +static const struct snd_soc_dai_ops pcm512x_dai_ops = { + .startup = pcm512x_dai_startup, + .hw_params = pcm512x_hw_params, + .set_fmt = pcm512x_set_fmt, + .mute_stream = pcm512x_mute, + .set_bclk_ratio = pcm512x_set_bclk_ratio, + .no_capture_mute = 1, +}; + +static struct snd_soc_dai_driver pcm512x_dai = { + .name = "pcm512x-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .rate_min = 8000, + .rate_max = 384000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE + }, + .ops = &pcm512x_dai_ops, +}; + +static const struct snd_soc_component_driver pcm512x_component_driver = { + .set_bias_level = pcm512x_set_bias_level, + .controls = pcm512x_controls, + .num_controls = ARRAY_SIZE(pcm512x_controls), + .dapm_widgets = pcm512x_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets), + .dapm_routes = pcm512x_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes), + .use_pmdown_time = 1, + .endianness = 1, +}; + +static const struct regmap_range_cfg pcm512x_range = { + .name = "Pages", .range_min = PCM512x_VIRT_BASE, + .range_max = PCM512x_MAX_REGISTER, + .selector_reg = PCM512x_PAGE, + .selector_mask = 0xff, + .window_start = 0, .window_len = 0x100, +}; + +const struct regmap_config pcm512x_regmap = { + .reg_bits = 8, + .val_bits = 8, + + .readable_reg = pcm512x_readable, + .volatile_reg = pcm512x_volatile, + + .ranges = &pcm512x_range, + .num_ranges = 1, + + .max_register = PCM512x_MAX_REGISTER, + .reg_defaults = pcm512x_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults), + .cache_type = REGCACHE_RBTREE, +}; +EXPORT_SYMBOL_GPL(pcm512x_regmap); + +int pcm512x_probe(struct device *dev, struct regmap *regmap) +{ + struct pcm512x_priv *pcm512x; + int i, ret; + + pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL); + if (!pcm512x) + return -ENOMEM; + + mutex_init(&pcm512x->mutex); + + dev_set_drvdata(dev, pcm512x); + pcm512x->regmap = regmap; + + for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) + pcm512x->supplies[i].supply = pcm512x_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies), + pcm512x->supplies); + if (ret != 0) { + dev_err(dev, "Failed to get supplies: %d\n", ret); + return ret; + } + + pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0; + pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1; + pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2; + + for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) { + ret = devm_regulator_register_notifier( + pcm512x->supplies[i].consumer, + &pcm512x->supply_nb[i]); + if (ret != 0) { + dev_err(dev, + "Failed to register regulator notifier: %d\n", + ret); + } + } + + ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies), + pcm512x->supplies); + if (ret != 0) { + dev_err(dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + /* Reset the device, verifying I/O in the process for I2C */ + ret = regmap_write(regmap, PCM512x_RESET, + PCM512x_RSTM | PCM512x_RSTR); + if (ret != 0) { + dev_err(dev, "Failed to reset device: %d\n", ret); + goto err; + } + + ret = regmap_write(regmap, PCM512x_RESET, 0); + if (ret != 0) { + dev_err(dev, "Failed to reset device: %d\n", ret); + goto err; + } + + pcm512x->sclk = devm_clk_get(dev, NULL); + if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto err; + } + if (!IS_ERR(pcm512x->sclk)) { + ret = clk_prepare_enable(pcm512x->sclk); + if (ret != 0) { + dev_err(dev, "Failed to enable SCLK: %d\n", ret); + goto err; + } + } + + /* Default to standby mode */ + ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, + PCM512x_RQST, PCM512x_RQST); + if (ret != 0) { + dev_err(dev, "Failed to request standby: %d\n", + ret); + goto err_clk; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + +#ifdef CONFIG_OF + if (dev->of_node) { + const struct device_node *np = dev->of_node; + u32 val; + + if (of_property_read_u32(np, "pll-in", &val) >= 0) { + if (val > 6) { + dev_err(dev, "Invalid pll-in\n"); + ret = -EINVAL; + goto err_pm; + } + pcm512x->pll_in = val; + } + + if (of_property_read_u32(np, "pll-out", &val) >= 0) { + if (val > 6) { + dev_err(dev, "Invalid pll-out\n"); + ret = -EINVAL; + goto err_pm; + } + pcm512x->pll_out = val; + } + + if (!pcm512x->pll_in != !pcm512x->pll_out) { + dev_err(dev, + "Error: both pll-in and pll-out, or none\n"); + ret = -EINVAL; + goto err_pm; + } + if (pcm512x->pll_in && pcm512x->pll_in == pcm512x->pll_out) { + dev_err(dev, "Error: pll-in == pll-out\n"); + ret = -EINVAL; + goto err_pm; + } + } +#endif + + ret = devm_snd_soc_register_component(dev, &pcm512x_component_driver, + &pcm512x_dai, 1); + if (ret != 0) { + dev_err(dev, "Failed to register CODEC: %d\n", ret); + goto err_pm; + } + + return 0; + +err_pm: + pm_runtime_disable(dev); +err_clk: + if (!IS_ERR(pcm512x->sclk)) + clk_disable_unprepare(pcm512x->sclk); +err: + regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies), + pcm512x->supplies); + return ret; +} +EXPORT_SYMBOL_GPL(pcm512x_probe); + +void pcm512x_remove(struct device *dev) +{ + struct pcm512x_priv *pcm512x = dev_get_drvdata(dev); + + pm_runtime_disable(dev); + if (!IS_ERR(pcm512x->sclk)) + clk_disable_unprepare(pcm512x->sclk); + regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies), + pcm512x->supplies); +} +EXPORT_SYMBOL_GPL(pcm512x_remove); + +#ifdef CONFIG_PM +static int pcm512x_suspend(struct device *dev) +{ + struct pcm512x_priv *pcm512x = dev_get_drvdata(dev); + int ret; + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, + PCM512x_RQPD, PCM512x_RQPD); + if (ret != 0) { + dev_err(dev, "Failed to request power down: %d\n", ret); + return ret; + } + + ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies), + pcm512x->supplies); + if (ret != 0) { + dev_err(dev, "Failed to disable supplies: %d\n", ret); + return ret; + } + + if (!IS_ERR(pcm512x->sclk)) + clk_disable_unprepare(pcm512x->sclk); + + return 0; +} + +static int pcm512x_resume(struct device *dev) +{ + struct pcm512x_priv *pcm512x = dev_get_drvdata(dev); + int ret; + + if (!IS_ERR(pcm512x->sclk)) { + ret = clk_prepare_enable(pcm512x->sclk); + if (ret != 0) { + dev_err(dev, "Failed to enable SCLK: %d\n", ret); + return ret; + } + } + + ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies), + pcm512x->supplies); + if (ret != 0) { + dev_err(dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + regcache_cache_only(pcm512x->regmap, false); + ret = regcache_sync(pcm512x->regmap); + if (ret != 0) { + dev_err(dev, "Failed to sync cache: %d\n", ret); + return ret; + } + + ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, + PCM512x_RQPD, 0); + if (ret != 0) { + dev_err(dev, "Failed to remove power down: %d\n", ret); + return ret; + } + + return 0; +} +#endif + +const struct dev_pm_ops pcm512x_pm_ops = { + SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL) +}; +EXPORT_SYMBOL_GPL(pcm512x_pm_ops); + +MODULE_DESCRIPTION("ASoC PCM512x codec driver"); +MODULE_AUTHOR("Mark Brown <broonie@kernel.org>"); +MODULE_LICENSE("GPL v2"); |