Audio System + Drivers (#562)

This commit is contained in:
Shadowtrance
2026-07-14 16:34:29 +10:00
committed by GitHub
parent fa4a6e255c
commit 955416dac8
137 changed files with 8847 additions and 387 deletions
@@ -0,0 +1,18 @@
cmake_minimum_required(VERSION 3.20)
include("${CMAKE_CURRENT_LIST_DIR}/../../Buildscripts/module.cmake")
file(GLOB_RECURSE SOURCE_FILES "source/*.c*")
tactility_add_module(dummy-i2s-amp-module
SRCS ${SOURCE_FILES}
INCLUDE_DIRS include/
REQUIRES TactilityKernel audio-codec-module esp_codec_dev
)
# audio_codec_sw_vol.h lives at the esp_codec_dev component root, which its own
# COMPONENT_ADD_INCLUDEDIRS (include interface device/include) does not expose.
if (DEFINED ENV{ESP_IDF_VERSION})
idf_component_get_property(esp_codec_dev_dir espressif__esp_codec_dev COMPONENT_DIR)
target_include_directories(${COMPONENT_LIB} PRIVATE "${esp_codec_dev_dir}")
endif()
@@ -0,0 +1,195 @@
Apache License
==============
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+16
View File
@@ -0,0 +1,16 @@
# Dummy I2S class-D amplifiers (MAX98357A, NS4168)
A driver covering any I2S class-D speaker amplifier with no I2C/register
interface -- just an I2S data line plus an optional GPIO enable (SD) pin --
wired as an output-only `AUDIO_CODEC_TYPE` device. Has no I2C parent; the device
sits standalone in the devicetree and only references the I2S controller by
name. Covers the Maxim MAX98357A and NSIway NS4168.
Since these amps have no hardware volume/mute registers, volume and mute are
applied in software on the PCM stream via `esp_codec_dev`'s software volume
handler.
See https://www.analog.com/media/en/technical-documentation/data-sheets/MAX98357A-MAX98357B.pdf
And https://datasheet.lcsc.com/lcsc/2110191830_NSIWAY-NS4168_C965904.pdf
License: [Apache v2.0](LICENSE-Apache-2.0.md)
@@ -0,0 +1,13 @@
description: Maxim MAX98357A class-D speaker amplifier (I2S input, optional GPIO enable)
compatible: "maxim,max98357a"
properties:
i2s:
type: phandle
required: true
description: "I2S controller device that carries audio data"
pin-enable:
type: phandles
default: GPIO_PIN_SPEC_NONE
description: "Amplifier enable (SD) pin. Omit if the amplifier is always enabled."
@@ -0,0 +1,13 @@
description: Nsiway NS4168 class-D speaker amplifier (I2S input, optional GPIO enable)
compatible: "nsiway,ns4168"
properties:
i2s:
type: phandle
required: true
description: "I2S controller device that carries audio data"
pin-enable:
type: phandles
default: GPIO_PIN_SPEC_NONE
description: "Amplifier enable (SD) pin. Omit if the amplifier is always enabled."
@@ -0,0 +1,3 @@
dependencies:
- TactilityKernel
bindings: bindings
@@ -0,0 +1,20 @@
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <tactility/bindings/bindings.h>
#include <drivers/dummy_i2s_amp.h>
#ifdef __cplusplus
extern "C" {
#endif
// One DEFINE_DEVICETREE per compatible string -- the devicetree compiler derives the
// expected config typedef name from the compatible string's suffix (e.g. "maxim,max98357a"
// -> max98357a_config_dt), not from a name we choose, so each supported chip needs its own
// typedef even though they all share the same underlying config layout.
DEFINE_DEVICETREE(max98357a, struct DummyI2sAmpConfig)
DEFINE_DEVICETREE(ns4168, struct DummyI2sAmpConfig)
#ifdef __cplusplus
}
#endif
@@ -0,0 +1,32 @@
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <tactility/error.h>
#include <tactility/drivers/audio_codec.h>
#include <tactility/drivers/gpio.h>
struct Device;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Dummy class-D amplifier configuration.
*
* Covers any speaker amp with no I2C/register interface -- just I2S data in plus an
* optional GPIO enable (SD) pin -- e.g. MAX98357A, NS4168. There is no I2C parent; the
* device sits standalone in the devicetree and only references the I2S controller by name.
*/
struct DummyI2sAmpConfig {
/** I2S controller device that carries audio data */
struct Device* i2s_device;
/** Optional amplifier enable pin (SD pin). GPIO_PIN_SPEC_NONE if not wired. */
struct GpioPinSpec enable_pin;
};
#ifdef __cplusplus
}
#endif
@@ -0,0 +1,14 @@
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <tactility/module.h>
#ifdef __cplusplus
extern "C" {
#endif
extern struct Module dummy_i2s_amp_module;
#ifdef __cplusplus
}
#endif
@@ -0,0 +1,385 @@
// SPDX-License-Identifier: Apache-2.0
#include <drivers/dummy_i2s_amp.h>
#include <tactility/device.h>
#include <tactility/drivers/audio_codec.h>
#include <tactility/drivers/audio_codec_adapters.h>
#include <tactility/drivers/i2s_controller.h>
#include <tactility/log.h>
#include <dummy_codec.h>
#include <esp_codec_dev.h>
#include <audio_codec_sw_vol.h>
#include <cmath>
#define TAG "DummyI2sAmp"
namespace {
// A dumb I2S class-D amp has no native rate of its own -- it just clocks whatever I2S
// frames arrive. Report a common default; audio_stream resamples to whatever rate it is
// opened with.
constexpr uint32_t NATIVE_SAMPLE_RATE = 44100;
struct DummyI2sAmpData {
const audio_codec_data_if_t* data_if = nullptr;
const audio_codec_gpio_if_t* gpio_if = nullptr;
const audio_codec_if_t* codec_if = nullptr;
const audio_codec_vol_if_t* vol_if = nullptr;
esp_codec_dev_handle_t codec_device = nullptr;
bool is_open = false;
esp_codec_dev_sample_info_t open_sample_info = {};
// esp_codec_dev_set_out_mute() short-circuits on dummy_codec's mute callback (which
// only toggles the PA enable GPIO, a no-op when there's no enable pin) and never
// reaches its own software-volume mute fallback as a result. Track mute state
// ourselves and implement it by zeroing/restoring volume through the working
// esp_codec_dev_set_out_vol() path (confirmed working, unlike mute) instead.
bool muted = false;
int volume_percent = 100;
};
#define GET_CONFIG(device) (static_cast<const DummyI2sAmpConfig*>((device)->config))
#define GET_DATA(device) (static_cast<DummyI2sAmpData*>(device_get_driver_data(device)))
// region AudioCodecApi
error_t open(Device* device, const struct AudioCodecStreamConfig* config) {
auto* data = GET_DATA(device);
if (data->codec_device == nullptr) {
return ERROR_RESOURCE;
}
if (config->direction != AUDIO_CODEC_DIR_OUTPUT && config->direction != AUDIO_CODEC_DIR_BOTH) {
return ERROR_NOT_SUPPORTED;
}
esp_codec_dev_sample_info_t sample_info = {
.bits_per_sample = config->bits_per_sample,
.channel = config->channels,
.channel_mask = 0,
.sample_rate = config->sample_rate,
.mclk_multiple = 0,
};
if (data->is_open) {
bool same_config = data->open_sample_info.bits_per_sample == sample_info.bits_per_sample
&& data->open_sample_info.channel == sample_info.channel
&& data->open_sample_info.sample_rate == sample_info.sample_rate;
return same_config ? ERROR_NONE : ERROR_RESOURCE;
}
if (esp_codec_dev_open(data->codec_device, &sample_info) != ESP_CODEC_DEV_OK) {
LOG_E(TAG, "Failed to open codec device");
return ERROR_RESOURCE;
}
data->is_open = true;
data->open_sample_info = sample_info;
return ERROR_NONE;
}
error_t close(Device* device) {
auto* data = GET_DATA(device);
if (data->codec_device == nullptr) {
return ERROR_RESOURCE;
}
if (data->is_open) {
esp_codec_dev_close(data->codec_device);
data->is_open = false;
}
return ERROR_NONE;
}
error_t read(Device* device, void* buffer, size_t size, size_t* bytes_read, TickType_t timeout) {
(void) device;
(void) buffer;
(void) size;
(void) bytes_read;
(void) timeout;
return ERROR_NOT_SUPPORTED;
}
error_t write(Device* device, const void* buffer, size_t size, size_t* bytes_written, TickType_t timeout) {
(void) timeout;
auto* data = GET_DATA(device);
if (!data->is_open) {
return ERROR_RESOURCE;
}
// esp_codec_dev_write returns the number of bytes written (>= 0) on success, or a negative
// ESP_CODEC_DEV_* error code on failure -- it does NOT return ESP_CODEC_DEV_OK (0) for
// a successful nonzero-length write.
int result = esp_codec_dev_write(data->codec_device, const_cast<void*>(buffer), (int) size);
if (result < 0) {
return ERROR_RESOURCE;
}
*bytes_written = (size_t) result;
return ERROR_NONE;
}
error_t set_volume(Device* device, AudioCodecDirection direction, float volume_percent) {
auto* data = GET_DATA(device);
if (data->codec_device == nullptr) {
return ERROR_RESOURCE;
}
if (direction != AUDIO_CODEC_DIR_OUTPUT) {
return ERROR_NOT_SUPPORTED;
}
if (volume_percent < 0.0f || volume_percent > 100.0f) {
return ERROR_RESOURCE;
}
data->volume_percent = (int) std::lround(volume_percent);
// Don't push the new volume to hardware while muted -- that would audibly unmute.
// It takes effect once set_mute(false) restores it.
if (data->muted) {
return ERROR_NONE;
}
return (esp_codec_dev_set_out_vol(data->codec_device, data->volume_percent) == ESP_CODEC_DEV_OK) ? ERROR_NONE : ERROR_RESOURCE;
}
error_t get_volume(Device* device, AudioCodecDirection direction, float* volume_percent) {
auto* data = GET_DATA(device);
if (data->codec_device == nullptr) {
return ERROR_RESOURCE;
}
if (direction != AUDIO_CODEC_DIR_OUTPUT) {
return ERROR_NOT_SUPPORTED;
}
*volume_percent = (float) data->volume_percent;
return ERROR_NONE;
}
error_t set_mute(Device* device, AudioCodecDirection direction, bool muted) {
auto* data = GET_DATA(device);
if (data->codec_device == nullptr) {
return ERROR_RESOURCE;
}
if (direction != AUDIO_CODEC_DIR_OUTPUT) {
return ERROR_NOT_SUPPORTED;
}
if (data->muted == muted) {
return ERROR_NONE;
}
// esp_codec_dev_set_out_mute() is unusable here -- see DummyI2sAmpData::muted comment.
// Implement mute as a volume override through the working esp_codec_dev_set_out_vol()
// path instead: zero the hardware volume while muted, restore the tracked percentage
// on unmute.
int target = muted ? 0 : data->volume_percent;
if (esp_codec_dev_set_out_vol(data->codec_device, target) != ESP_CODEC_DEV_OK) {
return ERROR_RESOURCE;
}
data->muted = muted;
return ERROR_NONE;
}
error_t get_mute(Device* device, AudioCodecDirection direction, bool* muted) {
auto* data = GET_DATA(device);
if (direction != AUDIO_CODEC_DIR_OUTPUT) {
return ERROR_NOT_SUPPORTED;
}
*muted = data->muted;
return ERROR_NONE;
}
error_t get_native_channels(Device* device, AudioCodecDirection direction, uint8_t* channels) {
(void) device;
if (direction != AUDIO_CODEC_DIR_OUTPUT) {
return ERROR_NOT_SUPPORTED;
}
*channels = 2;
return ERROR_NONE;
}
error_t get_native_sample_rate(Device* device, AudioCodecDirection direction, uint32_t* rate_hz) {
(void) device;
if (direction != AUDIO_CODEC_DIR_OUTPUT) {
return ERROR_NOT_SUPPORTED;
}
*rate_hz = NATIVE_SAMPLE_RATE;
return ERROR_NONE;
}
error_t get_capabilities(Device* device, AudioCodecDirection* supported_directions) {
(void) device;
*supported_directions = AUDIO_CODEC_DIR_OUTPUT;
return ERROR_NONE;
}
static const struct AudioCodecApi API = {
.open = open,
.close = close,
.read = read,
.write = write,
.set_volume = set_volume,
.get_volume = get_volume,
.set_mute = set_mute,
.get_mute = get_mute,
.get_native_sample_rate = get_native_sample_rate,
.get_native_channels = get_native_channels,
.get_capabilities = get_capabilities,
};
// endregion
// region Driver lifecycle
error_t start_device(Device* device) {
const auto* config = GET_CONFIG(device);
auto* i2s_controller = config->i2s_device;
if (i2s_controller == nullptr || device_get_type(i2s_controller) != &I2S_CONTROLLER_TYPE) {
LOG_E(TAG, "I2S controller device is not valid");
return ERROR_RESOURCE;
}
auto* data = new DummyI2sAmpData();
data->data_if = audio_codec_adapter_new_i2s_data(i2s_controller);
if (data->data_if == nullptr) {
LOG_E(TAG, "Failed to create I2S data adapter");
goto cleanup;
}
if (data->data_if->open(data->data_if, nullptr, 0) != ESP_CODEC_DEV_OK) {
LOG_E(TAG, "Failed to open data interface");
goto cleanup;
}
{
int16_t pa_pin = -1;
if (config->enable_pin.gpio_controller != nullptr) {
data->gpio_if = audio_codec_adapter_new_gpio(&config->enable_pin, 1);
if (data->gpio_if == nullptr) {
LOG_E(TAG, "Failed to create GPIO adapter for enable pin");
goto cleanup;
}
pa_pin = 0;
}
dummy_codec_cfg_t codec_config = {
.gpio_if = data->gpio_if,
.pa_pin = pa_pin,
.pa_reverted = false,
};
data->codec_if = dummy_codec_new(&codec_config);
if (data->codec_if == nullptr) {
LOG_E(TAG, "Failed to create dummy codec interface");
goto cleanup;
}
}
{
esp_codec_dev_cfg_t dev_config = {
.dev_type = ESP_CODEC_DEV_TYPE_OUT,
.codec_if = data->codec_if,
.data_if = data->data_if,
};
data->codec_device = esp_codec_dev_new(&dev_config);
if (data->codec_device == nullptr) {
LOG_E(TAG, "Failed to create codec device");
goto cleanup;
}
}
// Dumb I2S amps have no hardware volume/mute registers -- apply volume/mute in
// software on the PCM stream instead.
data->vol_if = audio_codec_new_sw_vol();
if (data->vol_if == nullptr || esp_codec_dev_set_vol_handler(data->codec_device, data->vol_if) != ESP_CODEC_DEV_OK) {
LOG_E(TAG, "Failed to install software volume handler");
goto cleanup;
}
device_set_driver_data(device, data);
return ERROR_NONE;
cleanup:
// Mirrors stop_device's teardown order -- delete_*_if() routines close their interface
// first, so we don't need separate ->close() calls here.
if (data->codec_device != nullptr) {
esp_codec_dev_delete(data->codec_device);
}
if (data->vol_if != nullptr) {
audio_codec_delete_vol_if(data->vol_if);
}
if (data->codec_if != nullptr) {
audio_codec_delete_codec_if(data->codec_if);
}
if (data->gpio_if != nullptr) {
audio_codec_adapter_delete_gpio(data->gpio_if);
}
if (data->data_if != nullptr) {
audio_codec_delete_data_if(data->data_if);
}
delete data;
return ERROR_RESOURCE;
}
error_t stop_device(Device* device) {
auto* data = GET_DATA(device);
if (data == nullptr) {
return ERROR_NONE;
}
if (data->is_open) {
esp_codec_dev_close(data->codec_device);
}
if (data->codec_device != nullptr) {
esp_codec_dev_delete(data->codec_device);
}
if (data->vol_if != nullptr) {
audio_codec_delete_vol_if(data->vol_if);
}
if (data->codec_if != nullptr) {
audio_codec_delete_codec_if(data->codec_if);
}
if (data->gpio_if != nullptr) {
audio_codec_adapter_delete_gpio(data->gpio_if);
}
if (data->data_if != nullptr) {
audio_codec_delete_data_if(data->data_if);
}
device_set_driver_data(device, nullptr);
delete data;
return ERROR_NONE;
}
// endregion
} // namespace
extern "C" {
Driver dummy_i2s_amp_driver = {
.name = "dummy_i2s_amp",
.compatible = (const char*[]) { "maxim,max98357a", "nsiway,ns4168", nullptr },
.start_device = start_device,
.stop_device = stop_device,
.api = &API,
.device_type = &AUDIO_CODEC_TYPE,
.owner = nullptr,
.internal = nullptr,
};
}
@@ -0,0 +1,30 @@
// SPDX-License-Identifier: Apache-2.0
#include <tactility/check.h>
#include <tactility/driver.h>
#include <tactility/module.h>
extern "C" {
extern Driver dummy_i2s_amp_driver;
static error_t start() {
check(driver_construct_add(&dummy_i2s_amp_driver) == ERROR_NONE);
return ERROR_NONE;
}
static error_t stop() {
check(driver_remove_destruct(&dummy_i2s_amp_driver) == ERROR_NONE);
return ERROR_NONE;
}
extern const ModuleSymbol dummy_i2s_amp_module_symbols[];
Module dummy_i2s_amp_module = {
.name = "dummy_i2s_amp",
.start = start,
.stop = stop,
.symbols = dummy_i2s_amp_module_symbols,
.internal = nullptr
};
}
@@ -0,0 +1,6 @@
// SPDX-License-Identifier: Apache-2.0
#include <tactility/module.h>
const struct ModuleSymbol dummy_i2s_amp_module_symbols[] = {
MODULE_SYMBOL_TERMINATOR
};