/* * cs4349.c -- CS4349 ALSA Soc Audio driver * * Copyright 2015 Cirrus Logic, Inc. * * Authors: Tim Howe <Tim.Howe@cirrus.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/platform_device.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/soc-dapm.h> #include <sound/initval.h> #include <sound/tlv.h> #include "cs4349.h" static const struct reg_default cs4349_reg_defaults[] = { { 2, 0x00 }, /* r02 - Mode Control */ { 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */ { 4, 0x81 }, /* r04 - Mute Control */ { 5, 0x00 }, /* r05 - Channel A Volume Control */ { 6, 0x00 }, /* r06 - Channel B Volume Control */ { 7, 0xB1 }, /* r07 - Ramp and Filter Control */ { 8, 0x1C }, /* r08 - Misc. Control */ }; /* Private data for the CS4349 */ struct cs4349_private { struct regmap *regmap; struct gpio_desc *reset_gpio; unsigned int mode; int rate; }; static bool cs4349_readable_register(struct device *dev, unsigned int reg) { switch (reg) { case CS4349_CHIPID ... CS4349_MISC: return true; default: return false; } } static bool cs4349_writeable_register(struct device *dev, unsigned int reg) { switch (reg) { case CS4349_MODE ... CS4349_MISC: return true; default: return false; } } static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int format) { struct snd_soc_codec *codec = codec_dai->codec; struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec); unsigned int fmt; fmt = format & SND_SOC_DAIFMT_FORMAT_MASK; switch (fmt) { case SND_SOC_DAIFMT_I2S: case SND_SOC_DAIFMT_LEFT_J: case SND_SOC_DAIFMT_RIGHT_J: cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK; break; default: return -EINVAL; } return 0; } static int cs4349_pcm_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 cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec); int fmt, ret; cs4349->rate = params_rate(params); switch (cs4349->mode) { case SND_SOC_DAIFMT_I2S: fmt = DIF_I2S; break; case SND_SOC_DAIFMT_LEFT_J: fmt = DIF_LEFT_JST; break; case SND_SOC_DAIFMT_RIGHT_J: switch (params_width(params)) { case 16: fmt = DIF_RGHT_JST16; break; case 24: fmt = DIF_RGHT_JST24; break; default: return -EINVAL; } break; default: return -EINVAL; } ret = snd_soc_update_bits(codec, CS4349_MODE, DIF_MASK, MODE_FORMAT(fmt)); if (ret < 0) return ret; return 0; } static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; int reg; reg = 0; if (mute) reg = MUTE_AB_MASK; return snd_soc_update_bits(codec, CS4349_MUTE, MUTE_AB_MASK, reg); } static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0); static const char * const chan_mix_texts[] = { "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB", "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL", "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono", /*Normal == Channel A = Left, Channel B = Right*/ }; static const char * const fm_texts[] = { "Auto", "Single", "Double", "Quad", }; static const char * const deemph_texts[] = { "None", "44.1k", "48k", "32k", }; static const char * const softr_zeroc_texts[] = { "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC", }; static int deemph_values[] = { 0, 4, 8, 12, }; static int softr_zeroc_values[] = { 0, 64, 128, 192, }; static const struct soc_enum chan_mix_enum = SOC_ENUM_SINGLE(CS4349_VMI, 0, ARRAY_SIZE(chan_mix_texts), chan_mix_texts); static const struct soc_enum fm_mode_enum = SOC_ENUM_SINGLE(CS4349_MODE, 0, ARRAY_SIZE(fm_texts), fm_texts); static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK, deemph_texts, deemph_values); static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0, SR_ZC_MASK, softr_zeroc_texts, softr_zeroc_values); static const struct snd_kcontrol_new cs4349_snd_controls[] = { SOC_DOUBLE_R_TLV("Master Playback Volume", CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv), SOC_ENUM("Functional Mode", fm_mode_enum), SOC_ENUM("De-Emphasis Control", deemph_enum), SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum), SOC_ENUM("Channel Mixer", chan_mix_enum), SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0), SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0), SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0), SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0), SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0), SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0), SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0), SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0), SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0), SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0), }; static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = { SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_OUTPUT("OutputA"), SND_SOC_DAPM_OUTPUT("OutputB"), }; static const struct snd_soc_dapm_route cs4349_routes[] = { {"DAC Playback", NULL, "OutputA"}, {"DAC Playback", NULL, "OutputB"}, {"OutputA", NULL, "HiFi DAC"}, {"OutputB", NULL, "HiFi DAC"}, }; #define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \ SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \ SNDRV_PCM_FMTBIT_S32_LE) #define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000 static const struct snd_soc_dai_ops cs4349_dai_ops = { .hw_params = cs4349_pcm_hw_params, .set_fmt = cs4349_set_dai_fmt, .digital_mute = cs4349_digital_mute, }; static struct snd_soc_dai_driver cs4349_dai = { .name = "cs4349_hifi", .playback = { .stream_name = "DAC Playback", .channels_min = 1, .channels_max = 2, .rates = CS4349_PCM_RATES, .formats = CS4349_PCM_FORMATS, }, .ops = &cs4349_dai_ops, .symmetric_rates = 1, }; static struct snd_soc_codec_driver soc_codec_dev_cs4349 = { .component_driver = { .controls = cs4349_snd_controls, .num_controls = ARRAY_SIZE(cs4349_snd_controls), .dapm_widgets = cs4349_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets), .dapm_routes = cs4349_routes, .num_dapm_routes = ARRAY_SIZE(cs4349_routes), }, }; static const struct regmap_config cs4349_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = CS4349_MISC, .reg_defaults = cs4349_reg_defaults, .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults), .readable_reg = cs4349_readable_register, .writeable_reg = cs4349_writeable_register, .cache_type = REGCACHE_RBTREE, }; static int cs4349_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct cs4349_private *cs4349; int ret; cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL); if (!cs4349) return -ENOMEM; cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap); if (IS_ERR(cs4349->regmap)) { ret = PTR_ERR(cs4349->regmap); dev_err(&client->dev, "regmap_init() failed: %d\n", ret); return ret; } /* Reset the Device */ cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(cs4349->reset_gpio)) return PTR_ERR(cs4349->reset_gpio); gpiod_set_value_cansleep(cs4349->reset_gpio, 1); i2c_set_clientdata(client, cs4349); return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4349, &cs4349_dai, 1); } static int cs4349_i2c_remove(struct i2c_client *client) { struct cs4349_private *cs4349 = i2c_get_clientdata(client); snd_soc_unregister_codec(&client->dev); /* Hold down reset */ gpiod_set_value_cansleep(cs4349->reset_gpio, 0); return 0; } #ifdef CONFIG_PM static int cs4349_runtime_suspend(struct device *dev) { struct cs4349_private *cs4349 = dev_get_drvdata(dev); int ret; ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN); if (ret < 0) return ret; regcache_cache_only(cs4349->regmap, true); /* Hold down reset */ gpiod_set_value_cansleep(cs4349->reset_gpio, 0); return 0; } static int cs4349_runtime_resume(struct device *dev) { struct cs4349_private *cs4349 = dev_get_drvdata(dev); int ret; ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0); if (ret < 0) return ret; gpiod_set_value_cansleep(cs4349->reset_gpio, 1); regcache_cache_only(cs4349->regmap, false); regcache_sync(cs4349->regmap); return 0; } #endif static const struct dev_pm_ops cs4349_runtime_pm = { SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume, NULL) }; static const struct of_device_id cs4349_of_match[] = { { .compatible = "cirrus,cs4349", }, {}, }; MODULE_DEVICE_TABLE(of, cs4349_of_match); static const struct i2c_device_id cs4349_i2c_id[] = { {"cs4349", 0}, {} }; MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id); static struct i2c_driver cs4349_i2c_driver = { .driver = { .name = "cs4349", .of_match_table = cs4349_of_match, }, .id_table = cs4349_i2c_id, .probe = cs4349_i2c_probe, .remove = cs4349_i2c_remove, }; module_i2c_driver(cs4349_i2c_driver); MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>"); MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver"); MODULE_LICENSE("GPL");