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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/codecs/wm8728.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/codecs/wm8728.c')
-rw-r--r-- | sound/soc/codecs/wm8728.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8728.c b/sound/soc/codecs/wm8728.c new file mode 100644 index 0000000000..0c943e7d41 --- /dev/null +++ b/sound/soc/codecs/wm8728.c @@ -0,0 +1,347 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * wm8728.c -- WM8728 ALSA SoC Audio driver + * + * Copyright 2008 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/i2c.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/of_device.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/initval.h> +#include <sound/tlv.h> + +#include "wm8728.h" + +/* + * We can't read the WM8728 register space so we cache them instead. + * Note that the defaults here aren't the physical defaults, we latch + * the volume update bits, mute the output and enable infinite zero + * detect. + */ +static const struct reg_default wm8728_reg_defaults[] = { + { 0, 0x1ff }, + { 1, 0x1ff }, + { 2, 0x001 }, + { 3, 0x100 }, +}; + +/* codec private data */ +struct wm8728_priv { + struct regmap *regmap; +}; + +static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); + +static const struct snd_kcontrol_new wm8728_snd_controls[] = { + +SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, + 0, 255, 0, wm8728_tlv), + +SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), +}; + +/* + * DAPM controls. + */ +static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { +SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), +SND_SOC_DAPM_OUTPUT("VOUTL"), +SND_SOC_DAPM_OUTPUT("VOUTR"), +}; + +static const struct snd_soc_dapm_route wm8728_intercon[] = { + {"VOUTL", NULL, "DAC"}, + {"VOUTR", NULL, "DAC"}, +}; + +static int wm8728_mute(struct snd_soc_dai *dai, int mute, int direction) +{ + struct snd_soc_component *component = dai->component; + u16 mute_reg = snd_soc_component_read(component, WM8728_DACCTL); + + if (mute) + snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1); + else + snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1); + + return 0; +} + +static int wm8728_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + u16 dac = snd_soc_component_read(component, WM8728_DACCTL); + + dac &= ~0x18; + + switch (params_width(params)) { + case 16: + break; + case 20: + dac |= 0x10; + break; + case 24: + dac |= 0x08; + break; + default: + return -EINVAL; + } + + snd_soc_component_write(component, WM8728_DACCTL, dac); + + return 0; +} + +static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int fmt) +{ + struct snd_soc_component *component = codec_dai->component; + u16 iface = snd_soc_component_read(component, WM8728_IFCTL); + + /* Currently only I2S is supported by the driver, though the + * hardware is more flexible. + */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + iface |= 1; + break; + default: + return -EINVAL; + } + + /* The hardware only support full slave mode */ + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBS_CFS: + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + iface &= ~0x22; + break; + case SND_SOC_DAIFMT_IB_NF: + iface |= 0x20; + iface &= ~0x02; + break; + case SND_SOC_DAIFMT_NB_IF: + iface |= 0x02; + iface &= ~0x20; + break; + case SND_SOC_DAIFMT_IB_IF: + iface |= 0x22; + break; + default: + return -EINVAL; + } + + snd_soc_component_write(component, WM8728_IFCTL, iface); + return 0; +} + +static int wm8728_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component); + u16 reg; + + switch (level) { + case SND_SOC_BIAS_ON: + case SND_SOC_BIAS_PREPARE: + case SND_SOC_BIAS_STANDBY: + if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { + /* Power everything up... */ + reg = snd_soc_component_read(component, WM8728_DACCTL); + snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4); + + /* ..then sync in the register cache. */ + regcache_sync(wm8728->regmap); + } + break; + + case SND_SOC_BIAS_OFF: + reg = snd_soc_component_read(component, WM8728_DACCTL); + snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4); + break; + } + return 0; +} + +#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) + +#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ + SNDRV_PCM_FMTBIT_S24_LE) + +static const struct snd_soc_dai_ops wm8728_dai_ops = { + .hw_params = wm8728_hw_params, + .mute_stream = wm8728_mute, + .set_fmt = wm8728_set_dai_fmt, + .no_capture_mute = 1, +}; + +static struct snd_soc_dai_driver wm8728_dai = { + .name = "wm8728-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = WM8728_RATES, + .formats = WM8728_FORMATS, + }, + .ops = &wm8728_dai_ops, +}; + +static const struct snd_soc_component_driver soc_component_dev_wm8728 = { + .set_bias_level = wm8728_set_bias_level, + .controls = wm8728_snd_controls, + .num_controls = ARRAY_SIZE(wm8728_snd_controls), + .dapm_widgets = wm8728_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), + .dapm_routes = wm8728_intercon, + .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), + .suspend_bias_off = 1, + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static const struct of_device_id wm8728_of_match[] = { + { .compatible = "wlf,wm8728", }, + { } +}; +MODULE_DEVICE_TABLE(of, wm8728_of_match); + +static const struct regmap_config wm8728_regmap = { + .reg_bits = 7, + .val_bits = 9, + .max_register = WM8728_IFCTL, + + .reg_defaults = wm8728_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), + .cache_type = REGCACHE_MAPLE, +}; + +#if defined(CONFIG_SPI_MASTER) +static int wm8728_spi_probe(struct spi_device *spi) +{ + struct wm8728_priv *wm8728; + int ret; + + wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), + GFP_KERNEL); + if (wm8728 == NULL) + return -ENOMEM; + + wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); + if (IS_ERR(wm8728->regmap)) + return PTR_ERR(wm8728->regmap); + + spi_set_drvdata(spi, wm8728); + + ret = devm_snd_soc_register_component(&spi->dev, + &soc_component_dev_wm8728, &wm8728_dai, 1); + + return ret; +} + +static struct spi_driver wm8728_spi_driver = { + .driver = { + .name = "wm8728", + .of_match_table = wm8728_of_match, + }, + .probe = wm8728_spi_probe, +}; +#endif /* CONFIG_SPI_MASTER */ + +#if IS_ENABLED(CONFIG_I2C) +static int wm8728_i2c_probe(struct i2c_client *i2c) +{ + struct wm8728_priv *wm8728; + int ret; + + wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), + GFP_KERNEL); + if (wm8728 == NULL) + return -ENOMEM; + + wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); + if (IS_ERR(wm8728->regmap)) + return PTR_ERR(wm8728->regmap); + + i2c_set_clientdata(i2c, wm8728); + + ret = devm_snd_soc_register_component(&i2c->dev, + &soc_component_dev_wm8728, &wm8728_dai, 1); + + return ret; +} + +static const struct i2c_device_id wm8728_i2c_id[] = { + { "wm8728", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); + +static struct i2c_driver wm8728_i2c_driver = { + .driver = { + .name = "wm8728", + .of_match_table = wm8728_of_match, + }, + .probe = wm8728_i2c_probe, + .id_table = wm8728_i2c_id, +}; +#endif + +static int __init wm8728_modinit(void) +{ + int ret = 0; +#if IS_ENABLED(CONFIG_I2C) + ret = i2c_add_driver(&wm8728_i2c_driver); + if (ret != 0) { + printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", + ret); + } +#endif +#if defined(CONFIG_SPI_MASTER) + ret = spi_register_driver(&wm8728_spi_driver); + if (ret != 0) { + printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", + ret); + } +#endif + return ret; +} +module_init(wm8728_modinit); + +static void __exit wm8728_exit(void) +{ +#if IS_ENABLED(CONFIG_I2C) + i2c_del_driver(&wm8728_i2c_driver); +#endif +#if defined(CONFIG_SPI_MASTER) + spi_unregister_driver(&wm8728_spi_driver); +#endif +} +module_exit(wm8728_exit); + +MODULE_DESCRIPTION("ASoC WM8728 driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |