The NeoFidelity NTP8918 is a two channel amplifier with mixer and biquad filters. Datasheet: https://datasheetspdf.com/pdf-down/N/T/P/NTP8918-NeoFidelity.pdf Signed-off-by: Igor Prusov <ivprusov@xxxxxxxxxxxxxxxxx> --- sound/soc/codecs/Kconfig | 5 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/ntp8918.c | 356 +++++++++++++++++++++++++++++++++++++ 3 files changed, 363 insertions(+) create mode 100644 sound/soc/codecs/ntp8918.c diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 9583243f1966..d16c983fcb7a 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -2495,6 +2495,11 @@ config SND_SOC_NAU8825 config SND_SOC_NTPFW tristate +config SND_SOC_NTP8918 + select SND_SOC_NTPFW + tristate "NeoFidelity NTP8918 amplifier" + depends on I2C + config SND_SOC_TPA6130A2 tristate "Texas Instruments TPA6130A2 headphone amplifier" depends on I2C diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index eae4ab047c72..a49ab11a98ec 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -183,6 +183,7 @@ snd-soc-nau8821-y := nau8821.o snd-soc-nau8822-y := nau8822.o snd-soc-nau8824-y := nau8824.o snd-soc-nau8825-y := nau8825.o +snd-soc-ntp8918-y := ntp8918.o snd-soc-ntpfw-y := ntpfw.o snd-soc-hdmi-codec-y := hdmi-codec.o snd-soc-pcm1681-y := pcm1681.o @@ -576,6 +577,7 @@ obj-$(CONFIG_SND_SOC_NAU8821) += snd-soc-nau8821.o obj-$(CONFIG_SND_SOC_NAU8822) += snd-soc-nau8822.o obj-$(CONFIG_SND_SOC_NAU8824) += snd-soc-nau8824.o obj-$(CONFIG_SND_SOC_NAU8825) += snd-soc-nau8825.o +obj-$(CONFIG_SND_SOC_NTP8918) += snd-soc-ntp8918.o obj-$(CONFIG_SND_SOC_NTPFW) += snd-soc-ntpfw.o obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o diff --git a/sound/soc/codecs/ntp8918.c b/sound/soc/codecs/ntp8918.c new file mode 100644 index 000000000000..185f8b235138 --- /dev/null +++ b/sound/soc/codecs/ntp8918.c @@ -0,0 +1,356 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for the NTP8918 Audio Amplifier + * + * Copyright (c) 2024, SaluteDevices. All Rights Reserved. + * + * Author: Igor Prusov <ivprusov@xxxxxxxxxxxxxxxxx> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/gpio.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/reset.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> + +#include <sound/initval.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-component.h> +#include <sound/tlv.h> + +#include "ntpfw.h" + +#define NTP8918_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000) + +#define NTP8918_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S20_3LE | \ + SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) + +#define NTP8918_INPUT_FMT 0x0 +#define NTP8918_INPUT_FMT_MASTER_MODE BIT(0) +#define NTP8918_INPUT_FMT_GSA_MODE BIT(1) +#define NTP8918_GSA_FMT 0x1 +#define NTP8918_GSA_BS_MASK GENMASK(3, 2) +#define NTP8918_GSA_BS(x) ((x) << 2) +#define NTP8918_GSA_RIGHT_J BIT(0) +#define NTP8918_GSA_LSB BIT(1) +#define NTP8918_MASTER_VOL 0x0C +#define NTP8918_CHNL_A_VOL 0x17 +#define NTP8918_CHNL_B_VOL 0x18 +#define NTP8918_SOFT_MUTE 0x33 +#define REG_MAX NTP8918_SOFT_MUTE + +#define NTP8918_FW_NAME "eq_8918.bin" +#define NTP8918_FW_MAGIC 0x38393138 /* "8918" */ + +struct ntp8918_priv { + struct i2c_client *i2c; + struct reset_control *reset; + unsigned int format; +}; + +static const DECLARE_TLV_DB_SCALE(ntp8918_master_vol_scale, -12550, 50, 0); + +static const struct snd_kcontrol_new ntp8918_vol_control[] = { + SOC_SINGLE_RANGE_TLV("Playback Volume", NTP8918_MASTER_VOL, 0, + 0x04, 0xff, 0, ntp8918_master_vol_scale), + SOC_DOUBLE("Playback Switch", NTP8918_SOFT_MUTE, 1, 0, 1, 1), +}; + +static void ntp8918_reset_gpio(struct ntp8918_priv *ntp8918, bool active) +{ + if (active) { + /* + * According to NTP8918 datasheet, 6.2 Timing Sequence 1: + * Deassert for T2 >= 1ms... + */ + reset_control_deassert(ntp8918->reset); + fsleep(1000); + + /* ...Assert for T3 >= 0.1us... */ + reset_control_assert(ntp8918->reset); + fsleep(1); + + /* ...Deassert, and wait for T4 >= 0.5ms before sound on sequence. */ + reset_control_deassert(ntp8918->reset); + fsleep(500); + } else { + reset_control_assert(ntp8918->reset); + } +} + +static const struct reg_sequence ntp8918_sound_off[] = { + { NTP8918_MASTER_VOL, 0 }, +}; + +static const struct reg_sequence ntp8918_sound_on[] = { + { NTP8918_MASTER_VOL, 0b11 }, +}; + +static int ntp8918_load_firmware(struct ntp8918_priv *ntp8918) +{ + int ret; + + ret = ntpfw_load(ntp8918->i2c, NTP8918_FW_NAME, NTP8918_FW_MAGIC); + if (ret == -ENOENT) { + dev_warn_once(&ntp8918->i2c->dev, "Could not find firmware %s\n", + NTP8918_FW_NAME); + return 0; + } + + return ret; +} + +static int ntp8918_snd_suspend(struct snd_soc_component *component) +{ + struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component); + + regcache_cache_only(component->regmap, true); + + regmap_multi_reg_write_bypassed(component->regmap, + ntp8918_sound_off, + ARRAY_SIZE(ntp8918_sound_off)); + + /* + * According to NTP8918 datasheet, 6.2 Timing Sequence 1: + * wait after sound off for T6 >= 0.5ms + */ + fsleep(500); + ntp8918_reset_gpio(ntp8918, false); + + regcache_mark_dirty(component->regmap); + + return 0; +} + +static int ntp8918_snd_resume(struct snd_soc_component *component) +{ + struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component); + int ret; + + ntp8918_reset_gpio(ntp8918, true); + + regmap_multi_reg_write_bypassed(component->regmap, + ntp8918_sound_on, + ARRAY_SIZE(ntp8918_sound_on)); + + ret = ntp8918_load_firmware(ntp8918); + if (ret) { + dev_err(&ntp8918->i2c->dev, "Failed to load firmware\n"); + return ret; + } + + regcache_cache_only(component->regmap, false); + snd_soc_component_cache_sync(component); + + return 0; +} + +static int ntp8918_probe(struct snd_soc_component *component) +{ + int ret; + struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component); + struct device *dev = component->dev; + + ret = snd_soc_add_component_controls(component, ntp8918_vol_control, + ARRAY_SIZE(ntp8918_vol_control)); + if (ret) + return dev_err_probe(dev, ret, "Failed to add controls\n"); + + ret = ntp8918_load_firmware(ntp8918); + if (ret) + return dev_err_probe(dev, ret, "Failed to load firmware\n"); + + return 0; +} + +static const struct snd_soc_dapm_widget ntp8918_dapm_widgets[] = { + SND_SOC_DAPM_DAC("AIFIN", "Playback", SND_SOC_NOPM, 0, 0), + + SND_SOC_DAPM_OUTPUT("OUT1"), + SND_SOC_DAPM_OUTPUT("OUT2"), +}; + +static const struct snd_soc_dapm_route ntp8918_dapm_routes[] = { + { "OUT1", NULL, "AIFIN" }, + { "OUT2", NULL, "AIFIN" }, +}; + +static const struct snd_soc_component_driver soc_component_ntp8918 = { + .probe = ntp8918_probe, + .suspend = ntp8918_snd_suspend, + .resume = ntp8918_snd_resume, + .dapm_widgets = ntp8918_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(ntp8918_dapm_widgets), + .dapm_routes = ntp8918_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(ntp8918_dapm_routes), +}; + +static int ntp8918_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; + struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component); + unsigned int input_fmt = 0; + unsigned int gsa_fmt = 0; + unsigned int gsa_fmt_mask; + int ret; + + switch (ntp8918->format) { + case SND_SOC_DAIFMT_I2S: + break; + case SND_SOC_DAIFMT_RIGHT_J: + input_fmt |= NTP8918_INPUT_FMT_GSA_MODE; + gsa_fmt |= NTP8918_GSA_RIGHT_J; + break; + case SND_SOC_DAIFMT_LEFT_J: + input_fmt |= NTP8918_INPUT_FMT_GSA_MODE; + break; + } + + ret = snd_soc_component_update_bits(component, NTP8918_INPUT_FMT, + NTP8918_INPUT_FMT_MASTER_MODE | + NTP8918_INPUT_FMT_GSA_MODE, + input_fmt); + + if (!(input_fmt & NTP8918_INPUT_FMT_GSA_MODE) || ret < 0) + return ret; + + switch (params_width(params)) { + case 24: + gsa_fmt |= NTP8918_GSA_BS(0); + break; + case 20: + gsa_fmt |= NTP8918_GSA_BS(1); + break; + case 18: + gsa_fmt |= NTP8918_GSA_BS(2); + break; + case 16: + gsa_fmt |= NTP8918_GSA_BS(3); + break; + default: + return -EINVAL; + } + + gsa_fmt_mask = NTP8918_GSA_BS_MASK | + NTP8918_GSA_RIGHT_J | + NTP8918_GSA_LSB; + return snd_soc_component_update_bits(component, NTP8918_GSA_FMT, + gsa_fmt_mask, gsa_fmt); +} + +static int ntp8918_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct snd_soc_component *component = dai->component; + struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component); + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + case SND_SOC_DAIFMT_RIGHT_J: + case SND_SOC_DAIFMT_LEFT_J: + ntp8918->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK; + break; + default: + return -EINVAL; + } + return 0; +} + +struct snd_soc_dai_ops ntp8918_dai_ops = { + .hw_params = ntp8918_hw_params, + .set_fmt = ntp8918_set_fmt, +}; + +static struct snd_soc_dai_driver ntp8918_dai = { + .name = "ntp8918-amplifier", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 2, + .rates = NTP8918_RATES, + .formats = NTP8918_FORMATS, + }, + .ops = &ntp8918_dai_ops, +}; + +static struct regmap_config ntp8918_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = REG_MAX, + .cache_type = REGCACHE_MAPLE, +}; + +static int ntp8918_i2c_probe(struct i2c_client *i2c) +{ + struct ntp8918_priv *ntp8918; + int ret; + struct regmap *regmap; + + ntp8918 = devm_kzalloc(&i2c->dev, sizeof(struct ntp8918_priv), GFP_KERNEL); + if (!ntp8918) + return -ENOMEM; + + ntp8918->i2c = i2c; + + ntp8918->reset = devm_reset_control_get_shared(&i2c->dev, NULL); + if (IS_ERR(ntp8918->reset)) + return dev_err_probe(&i2c->dev, PTR_ERR(ntp8918->reset), "Failed to get reset\n"); + + dev_set_drvdata(&i2c->dev, ntp8918); + + ntp8918_reset_gpio(ntp8918, true); + + regmap = devm_regmap_init_i2c(i2c, &ntp8918_regmap); + if (IS_ERR(regmap)) + return dev_err_probe(&i2c->dev, PTR_ERR(regmap), + "Failed to allocate regmap\n"); + + ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_ntp8918, + &ntp8918_dai, 1); + if (ret) + return dev_err_probe(&i2c->dev, ret, + "Failed to register component\n"); + + return 0; +} + +static const struct i2c_device_id ntp8918_i2c_id[] = { + { "ntp8918", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, ntp8918_i2c_id); + +static const struct of_device_id ntp8918_of_match[] = { + {.compatible = "neofidelity,ntp8918"}, + {} +}; +MODULE_DEVICE_TABLE(of, ntp8918_of_match); + +static struct i2c_driver ntp8918_i2c_driver = { + .probe = ntp8918_i2c_probe, + .id_table = ntp8918_i2c_id, + .driver = { + .name = "NTP8918", + .of_match_table = ntp8918_of_match, + }, +}; +module_i2c_driver(ntp8918_i2c_driver); + +MODULE_AUTHOR("Igor Prusov <ivprusov@xxxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("NTP8918 Audio Amplifier Driver"); +MODULE_LICENSE("GPL"); -- 2.34.1
