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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.4 *5 * Based on sound/soc/imx/imx-pcm-dma-mx2.c6 */7 8#include <linux/device.h>9#include <linux/init.h>10#include <linux/module.h>11 12#include <sound/core.h>13#include <sound/pcm.h>14#include <sound/soc.h>15#include <sound/dmaengine_pcm.h>16 17#include "mxs-pcm.h"18 19static const struct snd_pcm_hardware snd_mxs_hardware = {20 .info = SNDRV_PCM_INFO_MMAP |21 SNDRV_PCM_INFO_MMAP_VALID |22 SNDRV_PCM_INFO_PAUSE |23 SNDRV_PCM_INFO_RESUME |24 SNDRV_PCM_INFO_INTERLEAVED |25 SNDRV_PCM_INFO_HALF_DUPLEX,26 .period_bytes_min = 32,27 .period_bytes_max = 8192,28 .periods_min = 1,29 .periods_max = 52,30 .buffer_bytes_max = 64 * 1024,31 .fifo_size = 32,32};33 34static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = {35 .pcm_hardware = &snd_mxs_hardware,36 .prealloc_buffer_size = 64 * 1024,37};38 39int mxs_pcm_platform_register(struct device *dev)40{41 return devm_snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config,42 SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX);43}44EXPORT_SYMBOL_GPL(mxs_pcm_platform_register);45 46MODULE_DESCRIPTION("MXS ASoC PCM driver");47MODULE_LICENSE("GPL");48