/*
 * Copyright (c) 2018 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <kernel.h>
#include <syscall_handler.h>
#include <i2s.h>

Z_SYSCALL_HANDLER(i2s_buf_read, dev, buf, size)
{
	void *mem_block;
	size_t data_size;
	int ret;

	Z_OOPS(Z_SYSCALL_DRIVER_I2S(dev, read));

	ret = i2s_read((struct device *)dev, &mem_block, &data_size);

	if (!ret) {
		struct i2s_config *rx_cfg;
		int copy_success;

		/* Presumed to be configured otherwise the i2s_read() call
		 * would have failed.
		 */
		rx_cfg = i2s_config_get((struct device *)dev, I2S_DIR_RX);

		copy_success = z_user_to_copy((void *)buf, mem_block,
					      data_size);

		k_mem_slab_free(rx_cfg->mem_slab, mem_block);
		Z_OOPS(copy_success);
		Z_OOPS(z_user_to_copy((void *)size, &data_size,
				      sizeof(data_size)));
	}

	return ret;
}

Z_SYSCALL_HANDLER(i2s_buf_write, dev, buf, size)
{
	int ret;
	struct i2s_config *tx_cfg;
	void *mem_block;

	Z_OOPS(Z_SYSCALL_DRIVER_I2S(dev, write));
	tx_cfg = i2s_config_get((struct device *)dev, I2S_DIR_TX);
	if (!tx_cfg) {
		return -EIO;
	}

	if (size > tx_cfg->block_size) {
		return -EINVAL;
	}

	ret = k_mem_slab_alloc(tx_cfg->mem_slab, &mem_block, K_FOREVER);
	if (ret < 0) {
		return -ENOMEM;
	}

	ret = z_user_from_copy(mem_block, (void *)buf, size);
	if (ret) {
		k_mem_slab_free(tx_cfg->mem_slab, mem_block);
		Z_OOPS(ret);
	}

	return i2s_write((struct device *)dev, mem_block, size);
}

Z_SYSCALL_HANDLER(i2s_trigger, dev, dir, cmd)
{
	Z_OOPS(Z_SYSCALL_DRIVER_I2S(dev, trigger));

	return _impl_i2s_trigger((struct device *)dev, dir, cmd);
}