1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. 4 * 5 * Based on sound/soc/imx/imx-pcm-dma-mx2.c 6 */ 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 19 static 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 34 static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = { 35 .pcm_hardware = &snd_mxs_hardware, 36 .prealloc_buffer_size = 64 * 1024, 37 }; 38 39 int 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 } 44 EXPORT_SYMBOL_GPL(mxs_pcm_platform_register); 45 46 MODULE_DESCRIPTION("MXS ASoC PCM driver"); 47 MODULE_LICENSE("GPL"); 48