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esp-idf/components/driver/i2s/i2s_private.h

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/*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "freertos/FreeRTOS.h"
#include "soc/lldesc.h"
#include "soc/soc_caps.h"
#include "hal/i2s_types.h"
#include "driver/i2s_types.h"
#include "freertos/semphr.h"
#include "freertos/queue.h"
#if SOC_GDMA_SUPPORTED
#include "esp_private/gdma.h"
#endif
#include "esp_pm.h"
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
// If ISR handler is allowed to run whilst cache is disabled,
// Make sure all the code and related variables used by the handler are in the SRAM
#if CONFIG_I2S_ISR_IRAM_SAFE || CONFIG_GDMA_ISR_IRAM_SAFE
#define I2S_INTR_ALLOC_FLAGS (ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_INTRDISABLED | ESP_INTR_FLAG_SHARED | ESP_INTR_FLAG_LOWMED)
#define I2S_MEM_ALLOC_CAPS (MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT)
#else
#define I2S_INTR_ALLOC_FLAGS (ESP_INTR_FLAG_INTRDISABLED | ESP_INTR_FLAG_SHARED | ESP_INTR_FLAG_LOWMED)
#define I2S_MEM_ALLOC_CAPS MALLOC_CAP_DEFAULT
#endif //CONFIG_I2S_ISR_IRAM_SAFE
#define I2S_DMA_ALLOC_CAPS (MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA)
#define I2S_NULL_POINTER_CHECK(tag, p) ESP_RETURN_ON_FALSE((p), ESP_ERR_INVALID_ARG, tag, "input parameter '"#p"' is NULL")
/**
* @brief i2s channel state for checking if the operation in under right driver state
*/
typedef enum {
I2S_CHAN_STATE_REGISTER, /*!< i2s channel is registered (not initialized) */
I2S_CHAN_STATE_READY, /*!< i2s channel is disabled (initialized) */
I2S_CHAN_STATE_RUNNING, /*!< i2s channel is idling (initialized and enabled) */
} i2s_state_t;
/**
* @brief i2s channel level configurations
* @note It performs as channel handle
*/
typedef struct {
#if SOC_GDMA_SUPPORTED
gdma_channel_handle_t dma_chan; /*!< gdma channel handle */
#else
intr_handle_t dma_chan; /*!< interrupt channel handle */
#endif
uint32_t desc_num; /*!< I2S DMA buffer number, it is also the number of DMA descriptor */
uint32_t frame_num; /*!< I2S frame number in one DMA buffer. One frame means one-time sample data in all slots */
uint32_t buf_size; /*!< dma buffer size */
bool auto_clear; /*!< Set to auto clear DMA TX descriptor, i2s will always send zero automatically if no data to send */
uint32_t rw_pos; /*!< reading/writing pointer position */
void *curr_ptr; /*!< Pointer to current dma buffer */
lldesc_t **desc; /*!< dma descriptor array */
uint8_t **bufs; /*!< dma buffer array */
} i2s_dma_t;
/**
* @brief i2s controller level configurations
* @note Both i2s rx and tx channel are under its control
*/
typedef struct {
i2s_port_t id; /*!< i2s port id */
i2s_hal_context_t hal; /*!< hal context */
uint32_t chan_occupancy; /*!< channel occupancy (rx/tx) */
bool full_duplex; /*!< is full_duplex */
i2s_chan_handle_t tx_chan; /*!< tx channel handler */
i2s_chan_handle_t rx_chan; /*!< rx channel handler */
int mclk; /*!< MCK out pin, shared by tx/rx*/
} i2s_controller_t;
struct i2s_channel_obj_t {
/* Channel basic information */
i2s_controller_t *controller; /*!< Parent pointer to controller object */
i2s_comm_mode_t mode; /*!< i2s channel communication mode */
i2s_role_t role; /*!< i2s role */
i2s_dir_t dir; /*!< i2s channel direction */
i2s_dma_t dma; /*!< i2s dma object */
i2s_state_t state; /*!< i2s driver state. Ensuring the driver working in a correct sequence */
/* Stored configurations */
void *mode_info; /*!< Slot, clock and gpio information of each mode */
#if SOC_I2S_SUPPORTS_APLL
bool apll_en; /*!< Flag of wether APLL enabled */
#endif
uint32_t active_slot; /*!< Active slot number */
uint32_t total_slot; /*!< Total slot number */
/* Locks and queues */
SemaphoreHandle_t mutex; /*!< Mutex semaphore for the channel operations */
SemaphoreHandle_t binary; /*!< Binary semaphore for writing / reading / enabling / disabling */
#if CONFIG_PM_ENABLE
esp_pm_lock_handle_t pm_lock; /*!< Power management lock, to avoid apb clock frequency changes while i2s is working */
#endif
#if CONFIG_I2S_ISR_IRAM_SAFE
StaticSemaphore_t *mutex_struct; /*!< Static mutex struct */
StaticSemaphore_t *binary_struct; /*!< Static binary struct */
StaticQueue_t *msg_que_struct; /*!< Static message queue struct */
void *msg_que_storage; /*!< Static message queue storage */
#endif
QueueHandle_t msg_queue; /*!< Message queue handler, used for transporting data between interrupt and read/write task */
i2s_event_callbacks_t callbacks; /*!< Callback functions */
void *user_data; /*!< User data for callback functions */
void (*start)(i2s_chan_handle_t); /*!< start tx/rx channel */
void (*stop)(i2s_chan_handle_t); /*!< stop tx/rx channel */
};
/**
* @brief i2s platform level configurations
* @note All i2s controllers' resources are involved
*/
typedef struct {
portMUX_TYPE spinlock; /*!< Platform level lock */
i2s_controller_t *controller[SOC_I2S_NUM]; /*!< Controller object */
const char *comp_name[SOC_I2S_NUM]; /*!< The component name that occupied i2s controller */
} i2s_platform_t;
extern i2s_platform_t g_i2s;
/**
* @brief Initialize I2S DMA interrupt
*
* @param handle I2S channel handle
* @param intr_flag I2S interrupt flags, `ESP_INTR_FLAG_XXX` defined in `esp_intr_alloc.h`
* @return
* - ESP_OK Initialize interrupt success
* - ESP_ERR_INVALID_ARG Wrong port id or NULL pointer
*/
esp_err_t i2s_init_dma_intr(i2s_chan_handle_t handle, int intr_flag);
/**
* @brief Free I2S DMA descriptor and DMA buffer
*
* @param handle I2S channel handle
* @return
* - ESP_OK Free success
* - ESP_ERR_INVALID_ARG NULL pointer
*/
esp_err_t i2s_free_dma_desc(i2s_chan_handle_t handle);
/**
* @brief Allocate memory for I2S DMA descriptor and DMA buffer
*
* @param handle I2S channel handle
* @param bufsize The DMA buffer size
*
* @return
* - ESP_OK Allocate memory success
* - ESP_ERR_INVALID_ARG NULL pointer or bufsize is too big
* - ESP_ERR_NO_MEM No memory for DMA descriptor and DMA buffer
*/
esp_err_t i2s_alloc_dma_desc(i2s_chan_handle_t handle, uint32_t bufsize);
/**
* @brief Get DMA buffer size
*
* @param handle I2S channel handle
* @param data_bit_width Data bit width in one slot
* @param dma_frame_num Frame number in one DMA buffer
*
* @return
* - DMA buffer size
*/
uint32_t i2s_get_buf_size(i2s_chan_handle_t handle, uint32_t data_bit_width, uint32_t dma_frame_num);
/**
* @brief Get the frequency of the source clock
*
* @param clk_src clock source
* @param mclk_freq_hz Expected mclk frequency in Hz
* @return
* - Actual source clock frequency
*/
uint32_t i2s_get_source_clk_freq(i2s_clock_src_t clk_src, uint32_t mclk_freq_hz);
/**
* @brief Check gpio validity and attach to corresponding signal
*
* @param gpio GPIO number
* @param signal_idx Signal index
* @param is_input Is input gpio
* @param is_invert Is invert gpio
*/
void i2s_gpio_check_and_set(gpio_num_t gpio, uint32_t signal_idx, bool is_input, bool is_invert);
/**
* @brief Check gpio validity and output mclk signal
*
* @param id I2S port id
* @param gpio_num GPIO number
* @param is_apll Is using APLL as clock source
* @param is_invert Is invert the GPIO
* @return
* - ESP_OK Set mclk output gpio success
* - ESP_ERR_INVALID_ARG Invalid GPIO number
*/
esp_err_t i2s_check_set_mclk(i2s_port_t id, gpio_num_t gpio_num, bool is_apll, bool is_invert);
/**
* @brief Attach data out signal and data in signal to a same gpio
*
* @param gpio GPIO number
* @param out_sig_idx Data out signal index
* @param in_sig_idx Data in signal index
*/
void i2s_gpio_loopback_set(gpio_num_t gpio, uint32_t out_sig_idx, uint32_t in_sig_idx);
#ifdef __cplusplus
}
#endif
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