diff options
Diffstat (limited to 'kernel/sound/soc/codecs/cs4349.c')
| -rw-r--r-- | kernel/sound/soc/codecs/cs4349.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/kernel/sound/soc/codecs/cs4349.c b/kernel/sound/soc/codecs/cs4349.c new file mode 100644 index 000000000..0ac8fc5ed --- /dev/null +++ b/kernel/sound/soc/codecs/cs4349.c @@ -0,0 +1,392 @@ +/* + * 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 = { + .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"); |