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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * PCM1681 ASoC codec driver4 *5 * Copyright (c) StreamUnlimited GmbH 20136 * Marek Belisko <marek.belisko@streamunlimited.com>7 */8 9#include <linux/module.h>10#include <linux/slab.h>11#include <linux/delay.h>12#include <linux/gpio.h>13#include <linux/i2c.h>14#include <linux/regmap.h>15#include <linux/of.h>16#include <sound/pcm.h>17#include <sound/pcm_params.h>18#include <sound/soc.h>19#include <sound/tlv.h>20 21#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \22 SNDRV_PCM_FMTBIT_S24_LE)23 24#define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \25 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \26 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \27 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000)28 29#define PCM1681_SOFT_MUTE_ALL 0xff30#define PCM1681_DEEMPH_RATE_MASK 0x1831#define PCM1681_DEEMPH_MASK 0x0132 33#define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */34#define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */35#define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */36#define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */37#define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */38#define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */39 40static const struct reg_default pcm1681_reg_defaults[] = {41 { 0x01, 0xff },42 { 0x02, 0xff },43 { 0x03, 0xff },44 { 0x04, 0xff },45 { 0x05, 0xff },46 { 0x06, 0xff },47 { 0x07, 0x00 },48 { 0x08, 0x00 },49 { 0x09, 0x06 },50 { 0x0A, 0x00 },51 { 0x0B, 0xff },52 { 0x0C, 0x0f },53 { 0x0D, 0x00 },54 { 0x10, 0xff },55 { 0x11, 0xff },56 { 0x12, 0x00 },57 { 0x13, 0x00 },58};59 60static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg)61{62 return !((reg == 0x00) || (reg == 0x0f));63}64 65static bool pcm1681_writeable_reg(struct device *dev, unsigned int reg)66{67 return pcm1681_accessible_reg(dev, reg) &&68 (reg != PCM1681_ZERO_DETECT_STATUS);69}70 71struct pcm1681_private {72 struct regmap *regmap;73 unsigned int format;74 /* Current deemphasis status */75 unsigned int deemph;76 /* Current rate for deemphasis control */77 unsigned int rate;78};79 80static const int pcm1681_deemph[] = { 44100, 48000, 32000 };81 82static int pcm1681_set_deemph(struct snd_soc_component *component)83{84 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);85 int i, val = -1, enable = 0;86 87 if (priv->deemph) {88 for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) {89 if (pcm1681_deemph[i] == priv->rate) {90 val = i;91 break;92 }93 }94 }95 96 if (val != -1) {97 regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,98 PCM1681_DEEMPH_RATE_MASK, val << 3);99 enable = 1;100 } else {101 enable = 0;102 }103 104 /* enable/disable deemphasis functionality */105 return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,106 PCM1681_DEEMPH_MASK, enable);107}108 109static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol,110 struct snd_ctl_elem_value *ucontrol)111{112 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);113 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);114 115 ucontrol->value.integer.value[0] = priv->deemph;116 117 return 0;118}119 120static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,121 struct snd_ctl_elem_value *ucontrol)122{123 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);124 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);125 126 priv->deemph = ucontrol->value.integer.value[0];127 128 return pcm1681_set_deemph(component);129}130 131static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,132 unsigned int format)133{134 struct snd_soc_component *component = codec_dai->component;135 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);136 137 /* The PCM1681 can only be consumer to all clocks */138 if ((format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC) {139 dev_err(component->dev, "Invalid clocking mode\n");140 return -EINVAL;141 }142 143 priv->format = format;144 145 return 0;146}147 148static int pcm1681_mute(struct snd_soc_dai *dai, int mute, int direction)149{150 struct snd_soc_component *component = dai->component;151 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);152 int val;153 154 if (mute)155 val = PCM1681_SOFT_MUTE_ALL;156 else157 val = 0;158 159 return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val);160}161 162static int pcm1681_hw_params(struct snd_pcm_substream *substream,163 struct snd_pcm_hw_params *params,164 struct snd_soc_dai *dai)165{166 struct snd_soc_component *component = dai->component;167 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);168 int val = 0, ret;169 170 priv->rate = params_rate(params);171 172 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {173 case SND_SOC_DAIFMT_RIGHT_J:174 switch (params_width(params)) {175 case 24:176 val = 0;177 break;178 case 16:179 val = 3;180 break;181 default:182 return -EINVAL;183 }184 break;185 case SND_SOC_DAIFMT_I2S:186 val = 0x04;187 break;188 case SND_SOC_DAIFMT_LEFT_J:189 val = 0x05;190 break;191 default:192 dev_err(component->dev, "Invalid DAI format\n");193 return -EINVAL;194 }195 196 ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val);197 if (ret < 0)198 return ret;199 200 return pcm1681_set_deemph(component);201}202 203static const struct snd_soc_dai_ops pcm1681_dai_ops = {204 .set_fmt = pcm1681_set_dai_fmt,205 .hw_params = pcm1681_hw_params,206 .mute_stream = pcm1681_mute,207 .no_capture_mute = 1,208};209 210static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = {211SND_SOC_DAPM_OUTPUT("VOUT1"),212SND_SOC_DAPM_OUTPUT("VOUT2"),213SND_SOC_DAPM_OUTPUT("VOUT3"),214SND_SOC_DAPM_OUTPUT("VOUT4"),215SND_SOC_DAPM_OUTPUT("VOUT5"),216SND_SOC_DAPM_OUTPUT("VOUT6"),217SND_SOC_DAPM_OUTPUT("VOUT7"),218SND_SOC_DAPM_OUTPUT("VOUT8"),219};220 221static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = {222 { "VOUT1", NULL, "Playback" },223 { "VOUT2", NULL, "Playback" },224 { "VOUT3", NULL, "Playback" },225 { "VOUT4", NULL, "Playback" },226 { "VOUT5", NULL, "Playback" },227 { "VOUT6", NULL, "Playback" },228 { "VOUT7", NULL, "Playback" },229 { "VOUT8", NULL, "Playback" },230};231 232static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1);233 234static const struct snd_kcontrol_new pcm1681_controls[] = {235 SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",236 PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0,237 0x7f, 0, pcm1681_dac_tlv),238 SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",239 PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0,240 0x7f, 0, pcm1681_dac_tlv),241 SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",242 PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0,243 0x7f, 0, pcm1681_dac_tlv),244 SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume",245 PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0,246 0x7f, 0, pcm1681_dac_tlv),247 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,248 pcm1681_get_deemph, pcm1681_put_deemph),249};250 251static struct snd_soc_dai_driver pcm1681_dai = {252 .name = "pcm1681-hifi",253 .playback = {254 .stream_name = "Playback",255 .channels_min = 2,256 .channels_max = 8,257 .rates = PCM1681_PCM_RATES,258 .formats = PCM1681_PCM_FORMATS,259 },260 .ops = &pcm1681_dai_ops,261};262 263#ifdef CONFIG_OF264static const struct of_device_id pcm1681_dt_ids[] = {265 { .compatible = "ti,pcm1681", },266 { }267};268MODULE_DEVICE_TABLE(of, pcm1681_dt_ids);269#endif270 271static const struct regmap_config pcm1681_regmap = {272 .reg_bits = 8,273 .val_bits = 8,274 .max_register = 0x13,275 .reg_defaults = pcm1681_reg_defaults,276 .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults),277 .writeable_reg = pcm1681_writeable_reg,278 .readable_reg = pcm1681_accessible_reg,279};280 281static const struct snd_soc_component_driver soc_component_dev_pcm1681 = {282 .controls = pcm1681_controls,283 .num_controls = ARRAY_SIZE(pcm1681_controls),284 .dapm_widgets = pcm1681_dapm_widgets,285 .num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets),286 .dapm_routes = pcm1681_dapm_routes,287 .num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes),288 .idle_bias_on = 1,289 .use_pmdown_time = 1,290 .endianness = 1,291};292 293static const struct i2c_device_id pcm1681_i2c_id[] = {294 {"pcm1681"},295 {}296};297MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id);298 299static int pcm1681_i2c_probe(struct i2c_client *client)300{301 int ret;302 struct pcm1681_private *priv;303 304 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);305 if (!priv)306 return -ENOMEM;307 308 priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap);309 if (IS_ERR(priv->regmap)) {310 ret = PTR_ERR(priv->regmap);311 dev_err(&client->dev, "Failed to create regmap: %d\n", ret);312 return ret;313 }314 315 i2c_set_clientdata(client, priv);316 317 return devm_snd_soc_register_component(&client->dev,318 &soc_component_dev_pcm1681,319 &pcm1681_dai, 1);320}321 322static struct i2c_driver pcm1681_i2c_driver = {323 .driver = {324 .name = "pcm1681",325 .of_match_table = of_match_ptr(pcm1681_dt_ids),326 },327 .id_table = pcm1681_i2c_id,328 .probe = pcm1681_i2c_probe,329};330 331module_i2c_driver(pcm1681_i2c_driver);332 333MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver");334MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>");335MODULE_LICENSE("GPL");336