diff options
Diffstat (limited to 'sound/soc/codecs/lm4857.c')
| -rw-r--r-- | sound/soc/codecs/lm4857.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/sound/soc/codecs/lm4857.c b/sound/soc/codecs/lm4857.c new file mode 100644 index 000000000..dba161305 --- /dev/null +++ b/sound/soc/codecs/lm4857.c @@ -0,0 +1,148 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * LM4857 AMP driver + * + * Copyright 2007 Wolfson Microelectronics PLC. + * Author: Graeme Gregory + * graeme.gregory@wolfsonmicro.com + * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de> + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include <sound/core.h> +#include <sound/soc.h> +#include <sound/tlv.h> + +static const struct reg_default lm4857_default_regs[] = { + { 0x0, 0x00 }, + { 0x1, 0x00 }, + { 0x2, 0x00 }, + { 0x3, 0x00 }, +}; + +/* The register offsets in the cache array */ +#define LM4857_MVOL 0 +#define LM4857_LVOL 1 +#define LM4857_RVOL 2 +#define LM4857_CTRL 3 + +/* the shifts required to set these bits */ +#define LM4857_3D 5 +#define LM4857_WAKEUP 5 +#define LM4857_EPGAIN 4 + +static const unsigned int lm4857_mode_values[] = { + 0, + 6, + 7, + 8, + 9, +}; + +static const char * const lm4857_mode_texts[] = { + "Off", + "Earpiece", + "Loudspeaker", + "Loudspeaker + Headphone", + "Headphone", +}; + +static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum, + LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values); + +static const struct snd_kcontrol_new lm4857_mode_ctrl = + SOC_DAPM_ENUM("Mode", lm4857_mode_enum); + +static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = { + SND_SOC_DAPM_INPUT("IN"), + + SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl), + + SND_SOC_DAPM_OUTPUT("LS"), + SND_SOC_DAPM_OUTPUT("HP"), + SND_SOC_DAPM_OUTPUT("EP"), +}; + +static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0); +static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0); + +static const struct snd_kcontrol_new lm4857_controls[] = { + SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0, + stereo_tlv), + SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0, + stereo_tlv), + SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0, + mono_tlv), + SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0), + SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0), + SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL, + LM4857_WAKEUP, 1, 0), + SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL, + LM4857_EPGAIN, 1, 0), +}; + +static const struct snd_soc_dapm_route lm4857_routes[] = { + { "Mode", NULL, "IN" }, + { "LS", "Loudspeaker", "Mode" }, + { "LS", "Loudspeaker + Headphone", "Mode" }, + { "HP", "Headphone", "Mode" }, + { "HP", "Loudspeaker + Headphone", "Mode" }, + { "EP", "Earpiece", "Mode" }, +}; + +static const struct snd_soc_component_driver lm4857_component_driver = { + .controls = lm4857_controls, + .num_controls = ARRAY_SIZE(lm4857_controls), + .dapm_widgets = lm4857_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets), + .dapm_routes = lm4857_routes, + .num_dapm_routes = ARRAY_SIZE(lm4857_routes), +}; + +static const struct regmap_config lm4857_regmap_config = { + .val_bits = 6, + .reg_bits = 2, + + .max_register = LM4857_CTRL, + + .cache_type = REGCACHE_FLAT, + .reg_defaults = lm4857_default_regs, + .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs), +}; + +static int lm4857_i2c_probe(struct i2c_client *i2c) +{ + struct regmap *regmap; + + regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return devm_snd_soc_register_component(&i2c->dev, + &lm4857_component_driver, NULL, 0); +} + +static const struct i2c_device_id lm4857_i2c_id[] = { + { "lm4857", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id); + +static struct i2c_driver lm4857_i2c_driver = { + .driver = { + .name = "lm4857", + }, + .probe_new = lm4857_i2c_probe, + .id_table = lm4857_i2c_id, +}; + +module_i2c_driver(lm4857_i2c_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("LM4857 amplifier driver"); +MODULE_LICENSE("GPL"); |