/* * PCM1681 ASoC codec driver * * Copyright (c) StreamUnlimited GmbH 2013 * Marek Belisko <marek.belisko@streamunlimited.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_gpio.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/tlv.h> #define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S24_LE) #define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000) #define PCM1681_SOFT_MUTE_ALL 0xff #define PCM1681_DEEMPH_RATE_MASK 0x18 #define PCM1681_DEEMPH_MASK 0x01 #define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */ #define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */ #define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */ #define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */ #define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */ #define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */ static const struct reg_default pcm1681_reg_defaults[] = { { 0x01, 0xff }, { 0x02, 0xff }, { 0x03, 0xff }, { 0x04, 0xff }, { 0x05, 0xff }, { 0x06, 0xff }, { 0x07, 0x00 }, { 0x08, 0x00 }, { 0x09, 0x06 }, { 0x0A, 0x00 }, { 0x0B, 0xff }, { 0x0C, 0x0f }, { 0x0D, 0x00 }, { 0x10, 0xff }, { 0x11, 0xff }, { 0x12, 0x00 }, { 0x13, 0x00 }, }; static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg) { return !((reg == 0x00) || (reg == 0x0f)); } static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg) { return pcm1681_accessible_reg(dev, reg) && (reg != PCM1681_ZERO_DETECT_STATUS); } struct pcm1681_private { struct regmap *regmap; unsigned int format; /* Current deemphasis status */ unsigned int deemph; /* Current rate for deemphasis control */ unsigned int rate; }; static const int pcm1681_deemph[] = { 44100, 48000, 32000 }; static int pcm1681_set_deemph(struct snd_soc_codec *codec) { struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); int i = 0, val = -1, enable = 0; if (priv->deemph) for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) if (pcm1681_deemph[i] == priv->rate) val = i; if (val != -1) { regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, PCM1681_DEEMPH_RATE_MASK, val); enable = 1; } else enable = 0; /* enable/disable deemphasis functionality */ return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, PCM1681_DEEMPH_MASK, enable); } static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); ucontrol->value.enumerated.item[0] = priv->deemph; return 0; } static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); priv->deemph = ucontrol->value.enumerated.item[0]; return pcm1681_set_deemph(codec); } static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int format) { struct snd_soc_codec *codec = codec_dai->codec; struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); /* The PCM1681 can only be slave to all clocks */ if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { dev_err(codec->dev, "Invalid clocking mode\n"); return -EINVAL; } priv->format = format; return 0; } static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); int val; if (mute) val = PCM1681_SOFT_MUTE_ALL; else val = 0; return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val); } static int pcm1681_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); int val = 0, ret; priv->rate = params_rate(params); switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_RIGHT_J: switch (params_width(params)) { case 24: val = 0; break; case 16: val = 3; break; default: return -EINVAL; } break; case SND_SOC_DAIFMT_I2S: val = 0x04; break; case SND_SOC_DAIFMT_LEFT_J: val = 0x05; break; default: dev_err(codec->dev, "Invalid DAI format\n"); return -EINVAL; } ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val); if (ret < 0) return ret; return pcm1681_set_deemph(codec); } static const struct snd_soc_dai_ops pcm1681_dai_ops = { .set_fmt = pcm1681_set_dai_fmt, .hw_params = pcm1681_hw_params, .digital_mute = pcm1681_digital_mute, }; static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = { SND_SOC_DAPM_OUTPUT("VOUT1"), SND_SOC_DAPM_OUTPUT("VOUT2"), SND_SOC_DAPM_OUTPUT("VOUT3"), SND_SOC_DAPM_OUTPUT("VOUT4"), SND_SOC_DAPM_OUTPUT("VOUT5"), SND_SOC_DAPM_OUTPUT("VOUT6"), SND_SOC_DAPM_OUTPUT("VOUT7"), SND_SOC_DAPM_OUTPUT("VOUT8"), }; static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = { { "VOUT1", NULL, "Playback" }, { "VOUT2", NULL, "Playback" }, { "VOUT3", NULL, "Playback" }, { "VOUT4", NULL, "Playback" }, { "VOUT5", NULL, "Playback" }, { "VOUT6", NULL, "Playback" }, { "VOUT7", NULL, "Playback" }, { "VOUT8", NULL, "Playback" }, }; static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1); static const struct snd_kcontrol_new pcm1681_controls[] = { SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume", PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0, 0x7f, 0, pcm1681_dac_tlv), SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume", PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0, 0x7f, 0, pcm1681_dac_tlv), SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume", PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0, 0x7f, 0, pcm1681_dac_tlv), SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume", PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0, 0x7f, 0, pcm1681_dac_tlv), SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, pcm1681_get_deemph, pcm1681_put_deemph), }; static struct snd_soc_dai_driver pcm1681_dai = { .name = "pcm1681-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 8, .rates = PCM1681_PCM_RATES, .formats = PCM1681_PCM_FORMATS, }, .ops = &pcm1681_dai_ops, }; #ifdef CONFIG_OF static const struct of_device_id pcm1681_dt_ids[] = { { .compatible = "ti,pcm1681", }, { } }; MODULE_DEVICE_TABLE(of, pcm1681_dt_ids); #endif static const struct regmap_config pcm1681_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = 0x13, .reg_defaults = pcm1681_reg_defaults, .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults), .writeable_reg = pcm1681_writeable_reg, .readable_reg = pcm1681_accessible_reg, }; static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = { .controls = pcm1681_controls, .num_controls = ARRAY_SIZE(pcm1681_controls), .dapm_widgets = pcm1681_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets), .dapm_routes = pcm1681_dapm_routes, .num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes), }; static const struct i2c_device_id pcm1681_i2c_id[] = { {"pcm1681", 0}, {} }; MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id); static int pcm1681_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret; struct pcm1681_private *priv; priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap); if (IS_ERR(priv->regmap)) { ret = PTR_ERR(priv->regmap); dev_err(&client->dev, "Failed to create regmap: %d\n", ret); return ret; } i2c_set_clientdata(client, priv); return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681, &pcm1681_dai, 1); } static int pcm1681_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static struct i2c_driver pcm1681_i2c_driver = { .driver = { .name = "pcm1681", .owner = THIS_MODULE, .of_match_table = of_match_ptr(pcm1681_dt_ids), }, .id_table = pcm1681_i2c_id, .probe = pcm1681_i2c_probe, .remove = pcm1681_i2c_remove, }; module_i2c_driver(pcm1681_i2c_driver); MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver"); MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>"); MODULE_LICENSE("GPL");