mirror of
https://github.com/zephyrproject-rtos/zephyr
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06c23f157f
User mode may now access the read, write, and trigger APIs. Unlike supervisor mode, memory slabs are not dealt with directly, the data is always copied. A new driver API added to fetch the current channel configuration, used by the system call handlers. The i2s_sam_ssc driver updated for the new API. CAVS driver not modified as there is no user mode port to Xtensa yet. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
53 lines
985 B
C
53 lines
985 B
C
/*
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <string.h>
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#include <i2s.h>
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int _impl_i2s_buf_read(struct device *dev, void *buf, size_t *size)
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{
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void *mem_block;
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int ret;
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ret = i2s_read((struct device *)dev, &mem_block, size);
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if (!ret) {
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struct i2s_config *rx_cfg =
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i2s_config_get((struct device *)dev, I2S_DIR_RX);
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memcpy(buf, mem_block, *size);
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k_mem_slab_free(rx_cfg->mem_slab, mem_block);
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}
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return ret;
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}
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int _impl_i2s_buf_write(struct device *dev, void *buf, size_t size)
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{
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int ret;
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struct i2s_config *tx_cfg;
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void *mem_block;
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tx_cfg = i2s_config_get((struct device *)dev, I2S_DIR_TX);
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if (!tx_cfg) {
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return -EIO;
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}
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if (size > tx_cfg->block_size) {
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return -EINVAL;
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}
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ret = k_mem_slab_alloc(tx_cfg->mem_slab, &mem_block, K_FOREVER);
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if (ret < 0) {
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return -ENOMEM;
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}
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memcpy(mem_block, (void *)buf, size);
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return i2s_write((struct device *)dev, mem_block, size);
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}
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