Audio System + Drivers (#562)

Drivers/audio-codec-module/source/audio_codec_ctrl_if_i2c.c

@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: Apache-2.0
+#include <tactility/drivers/audio_codec_adapters.h>
+#include <tactility/drivers/i2c_controller.h>
+#include <tactility/freertos/freertos.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#define I2C_TIMEOUT_TICKS pdMS_TO_TICKS(100)
+
+struct I2cCtrlContext {
+    audio_codec_ctrl_if_t base;
+    struct Device* i2c_controller;
+    uint8_t address;
+    bool is_open;
+};
+
+static bool ctrl_is_open(const audio_codec_ctrl_if_t* handle) {
+    const struct I2cCtrlContext* context = (const struct I2cCtrlContext*) handle;
+    return context->is_open;
+}
+
+static int ctrl_open(const audio_codec_ctrl_if_t* handle, void* config, int config_size) {
+    (void) config;
+    (void) config_size;
+    struct I2cCtrlContext* context = (struct I2cCtrlContext*) handle;
+    context->is_open = true;
+    return ESP_CODEC_DEV_OK;
+}
+
+static int ctrl_read_reg(const audio_codec_ctrl_if_t* handle, int reg, int reg_len, void* data, int data_len) {
+    struct I2cCtrlContext* context = (struct I2cCtrlContext*) handle;
+    if (!context->is_open || reg_len != 1) {
+        return ESP_CODEC_DEV_NOT_SUPPORT;
+    }
+    if (data_len < 0 || data_len > UINT16_MAX) {
+        return ESP_CODEC_DEV_NOT_SUPPORT;
+    }
+    error_t error = i2c_controller_read_register(context->i2c_controller, context->address, (uint8_t) reg, (uint8_t*) data, (size_t) data_len, I2C_TIMEOUT_TICKS);
+    return (error == ERROR_NONE) ? ESP_CODEC_DEV_OK : ESP_CODEC_DEV_READ_FAIL;
+}
+
+static int ctrl_write_reg(const audio_codec_ctrl_if_t* handle, int reg, int reg_len, void* data, int data_len) {
+    struct I2cCtrlContext* context = (struct I2cCtrlContext*) handle;
+    if (!context->is_open || reg_len != 1) {
+        return ESP_CODEC_DEV_NOT_SUPPORT;
+    }
+    if (data_len < 0 || data_len > UINT16_MAX) {
+        return ESP_CODEC_DEV_NOT_SUPPORT;
+    }
+    error_t error = i2c_controller_write_register(context->i2c_controller, context->address, (uint8_t) reg, (const uint8_t*) data, (uint16_t) data_len, I2C_TIMEOUT_TICKS);
+    return (error == ERROR_NONE) ? ESP_CODEC_DEV_OK : ESP_CODEC_DEV_WRITE_FAIL;
+}
+
+static int ctrl_close(const audio_codec_ctrl_if_t* handle) {
+    struct I2cCtrlContext* context = (struct I2cCtrlContext*) handle;
+    context->is_open = false;
+    return ESP_CODEC_DEV_OK;
+}
+
+const audio_codec_ctrl_if_t* audio_codec_adapter_new_i2c_ctrl(struct Device* i2c_controller, uint8_t address) {
+    if (i2c_controller == NULL) {
+        return NULL;
+    }
+
+    struct I2cCtrlContext* context = (struct I2cCtrlContext*) calloc(1, sizeof(struct I2cCtrlContext));
+    if (context == NULL) {
+        return NULL;
+    }
+
+    context->i2c_controller = i2c_controller;
+    context->address = address;
+    context->is_open = false;
+    context->base.open = ctrl_open;
+    context->base.is_open = ctrl_is_open;
+    context->base.read_reg = ctrl_read_reg;
+    context->base.write_reg = ctrl_write_reg;
+    context->base.close = ctrl_close;
+
+    return &context->base;
+}
+
+// Note: esp_codec_dev already provides audio_codec_delete_ctrl_if() (calls ->close then frees);
+// no adapter-specific cleanup is needed, so we don't redefine it here.