381 lines
9.7 KiB
C
381 lines
9.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* MAX98504 ALSA SoC Audio driver
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*
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* Copyright 2013 - 2014 Maxim Integrated Products
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* Copyright 2016 Samsung Electronics Co., Ltd.
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*/
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <sound/soc.h>
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#include "max98504.h"
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static const char * const max98504_supply_names[] = {
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"DVDD",
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"DIOVDD",
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"PVDD",
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};
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#define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)
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struct max98504_priv {
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struct regmap *regmap;
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struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];
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unsigned int pcm_rx_channels;
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bool brownout_enable;
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unsigned int brownout_threshold;
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unsigned int brownout_attenuation;
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unsigned int brownout_attack_hold;
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unsigned int brownout_timed_hold;
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unsigned int brownout_release_rate;
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};
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static struct reg_default max98504_reg_defaults[] = {
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{ 0x01, 0},
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{ 0x02, 0},
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{ 0x03, 0},
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{ 0x04, 0},
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{ 0x10, 0},
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{ 0x11, 0},
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{ 0x12, 0},
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{ 0x13, 0},
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{ 0x14, 0},
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{ 0x15, 0},
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{ 0x16, 0},
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{ 0x17, 0},
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{ 0x18, 0},
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{ 0x19, 0},
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{ 0x1A, 0},
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{ 0x20, 0},
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{ 0x21, 0},
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{ 0x22, 0},
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{ 0x23, 0},
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{ 0x24, 0},
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{ 0x25, 0},
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{ 0x26, 0},
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{ 0x27, 0},
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{ 0x28, 0},
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{ 0x30, 0},
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{ 0x31, 0},
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{ 0x32, 0},
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{ 0x33, 0},
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{ 0x34, 0},
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{ 0x35, 0},
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{ 0x36, 0},
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{ 0x37, 0},
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{ 0x38, 0},
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{ 0x39, 0},
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{ 0x40, 0},
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{ 0x41, 0},
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};
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static bool max98504_volatile_register(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case MAX98504_INTERRUPT_STATUS:
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case MAX98504_INTERRUPT_FLAGS:
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case MAX98504_INTERRUPT_FLAG_CLEARS:
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case MAX98504_WATCHDOG_CLEAR:
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case MAX98504_GLOBAL_ENABLE:
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case MAX98504_SOFTWARE_RESET:
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return true;
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default:
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return false;
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}
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}
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static bool max98504_readable_register(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case MAX98504_SOFTWARE_RESET:
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case MAX98504_WATCHDOG_CLEAR:
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case MAX98504_INTERRUPT_FLAG_CLEARS:
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return false;
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default:
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return true;
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}
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}
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static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol, int event)
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{
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struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
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struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
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switch (event) {
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case SND_SOC_DAPM_PRE_PMU:
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regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,
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max98504->pcm_rx_channels);
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break;
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case SND_SOC_DAPM_POST_PMD:
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regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);
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break;
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}
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return 0;
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}
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static int max98504_component_probe(struct snd_soc_component *c)
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{
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struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
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struct regmap *map = max98504->regmap;
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int ret;
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ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);
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if (ret < 0)
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return ret;
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regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);
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msleep(20);
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if (!max98504->brownout_enable)
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return 0;
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regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);
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regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,
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(max98504->brownout_threshold & 0x1f) << 3 |
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(max98504->brownout_attenuation & 0x3));
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regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,
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max98504->brownout_attack_hold & 0xff);
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regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,
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max98504->brownout_timed_hold & 0xff);
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regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,
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max98504->brownout_release_rate & 0xff);
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return 0;
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}
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static void max98504_component_remove(struct snd_soc_component *c)
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{
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struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
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regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);
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}
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static const char *spk_source_mux_text[] = {
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"PCM Monomix", "Analog In", "PDM Left", "PDM Right"
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};
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static const struct soc_enum spk_source_mux_enum =
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SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,
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0, ARRAY_SIZE(spk_source_mux_text),
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spk_source_mux_text);
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static const struct snd_kcontrol_new spk_source_mux =
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SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);
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static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
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{ "SPKOUT", NULL, "Global Enable" },
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{ "SPK Source", "PCM Monomix", "DAC PCM" },
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{ "SPK Source", "Analog In", "AIN" },
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{ "SPK Source", "PDM Left", "DAC PDM" },
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{ "SPK Source", "PDM Right", "DAC PDM" },
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};
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static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
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SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,
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0, 0, NULL, 0),
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SND_SOC_DAPM_INPUT("AIN"),
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SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,
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max98504_pcm_rx_ev,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
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SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),
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SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),
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SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
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MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),
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};
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static int max98504_set_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask,
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int slots, int slot_width)
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{
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struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
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struct regmap *map = max98504->regmap;
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switch (dai->id) {
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case MAX98504_DAI_ID_PCM:
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regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);
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max98504->pcm_rx_channels = rx_mask;
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break;
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case MAX98504_DAI_ID_PDM:
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regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);
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break;
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default:
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WARN_ON(1);
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}
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return 0;
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}
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static int max98504_set_channel_map(struct snd_soc_dai *dai,
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unsigned int tx_num, unsigned int *tx_slot,
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unsigned int rx_num, unsigned int *rx_slot)
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{
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struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
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struct regmap *map = max98504->regmap;
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unsigned int i, sources = 0;
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for (i = 0; i < tx_num; i++)
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if (tx_slot[i])
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sources |= (1 << i);
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switch (dai->id) {
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case MAX98504_DAI_ID_PCM:
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regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,
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sources);
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break;
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case MAX98504_DAI_ID_PDM:
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regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);
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break;
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default:
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WARN_ON(1);
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}
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regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);
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return 0;
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}
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static const struct snd_soc_dai_ops max98504_dai_ops = {
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.set_tdm_slot = max98504_set_tdm_slot,
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.set_channel_map = max98504_set_channel_map,
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};
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#define MAX98504_FORMATS (SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\
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SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)
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#define MAX98504_PDM_RATES (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
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SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\
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SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\
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SNDRV_PCM_RATE_96000)
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static struct snd_soc_dai_driver max98504_dai[] = {
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/* TODO: Add the PCM interface definitions */
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{
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.name = "max98504-aif2",
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.id = MAX98504_DAI_ID_PDM,
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.playback = {
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.stream_name = "AIF2 Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = MAX98504_PDM_RATES,
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.formats = MAX98504_FORMATS,
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},
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.capture = {
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.stream_name = "AIF2 Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = MAX98504_PDM_RATES,
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.formats = MAX98504_FORMATS,
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},
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.ops = &max98504_dai_ops,
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},
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};
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static const struct snd_soc_component_driver max98504_component_driver = {
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.probe = max98504_component_probe,
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.remove = max98504_component_remove,
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.dapm_widgets = max98504_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(max98504_dapm_widgets),
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.dapm_routes = max98504_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(max98504_dapm_routes),
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.endianness = 1,
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};
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static const struct regmap_config max98504_regmap = {
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.reg_bits = 16,
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.val_bits = 8,
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.max_register = MAX98504_MAX_REGISTER,
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.reg_defaults = max98504_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(max98504_reg_defaults),
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.volatile_reg = max98504_volatile_register,
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.readable_reg = max98504_readable_register,
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.cache_type = REGCACHE_RBTREE,
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};
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static int max98504_i2c_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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struct device_node *node = dev->of_node;
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struct max98504_priv *max98504;
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int i, ret;
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max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);
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if (!max98504)
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return -ENOMEM;
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if (node) {
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if (!of_property_read_u32(node, "maxim,brownout-threshold",
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&max98504->brownout_threshold))
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max98504->brownout_enable = true;
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of_property_read_u32(node, "maxim,brownout-attenuation",
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&max98504->brownout_attenuation);
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of_property_read_u32(node, "maxim,brownout-attack-hold-ms",
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&max98504->brownout_attack_hold);
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of_property_read_u32(node, "maxim,brownout-timed-hold-ms",
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&max98504->brownout_timed_hold);
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of_property_read_u32(node, "maxim,brownout-release-rate-ms",
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&max98504->brownout_release_rate);
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}
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max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
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if (IS_ERR(max98504->regmap)) {
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ret = PTR_ERR(max98504->regmap);
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dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
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return ret;
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}
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for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)
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max98504->supplies[i].supply = max98504_supply_names[i];
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ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,
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max98504->supplies);
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if (ret < 0)
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return ret;
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i2c_set_clientdata(client, max98504);
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return devm_snd_soc_register_component(dev, &max98504_component_driver,
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max98504_dai, ARRAY_SIZE(max98504_dai));
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}
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#ifdef CONFIG_OF
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static const struct of_device_id max98504_of_match[] = {
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{ .compatible = "maxim,max98504" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, max98504_of_match);
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#endif
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static const struct i2c_device_id max98504_i2c_id[] = {
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{ "max98504" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);
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static struct i2c_driver max98504_i2c_driver = {
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.driver = {
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.name = "max98504",
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.of_match_table = of_match_ptr(max98504_of_match),
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},
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.probe_new = max98504_i2c_probe,
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.id_table = max98504_i2c_id,
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};
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module_i2c_driver(max98504_i2c_driver);
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MODULE_DESCRIPTION("ASoC MAX98504 driver");
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MODULE_LICENSE("GPL");
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