mbox_rpi_pico.h

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/*
 * Copyright (c) 2025 Igalia S.L.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_DRIVERS_MISC_MBOX_PICO_RPI_PIO_PICO_RPI_H_
#define ZEPHYR_DRIVERS_MISC_MBOX_PICO_RPI_PIO_PICO_RPI_H_

 
#include <hardware/structs/sio.h>

static inline bool rpi_pico_mbox_write_ready(sio_hw_t *const sio_block)
{
        return sio_block->fifo_st & SIO_FIFO_ST_RDY_BITS;
}

static inline bool rpi_pico_mbox_read_valid(sio_hw_t *const sio_block)
{
        return sio_block->fifo_st & SIO_FIFO_ST_VLD_BITS;
}

static inline void rpi_pico_mbox_drain(sio_hw_t *const sio_block)
{
        while (rpi_pico_mbox_read_valid(sio_block)) {
                (void)sio_block->fifo_rd;
        }
}

static inline void rpi_pico_mbox_write(sio_hw_t *const sio_block, uint32_t value)
{
        sio_block->fifo_wr = value;
}

static inline uint32_t rpi_pico_mbox_read(sio_hw_t *const sio_block)
{
        return sio_block->fifo_rd;
}

 
#endif /* ZEPHYR_DRIVERS_MISC_MBOX_PICO_RPI_PIO_PICO_RPI_H_ */