12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2f19493a3SShawn Guo /* 3f19493a3SShawn Guo * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer 4f19493a3SShawn Guo * 5f19493a3SShawn Guo * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> 6f19493a3SShawn Guo * 7f19493a3SShawn Guo * This code is based on code copyrighted by Freescale, 8f19493a3SShawn Guo * Liam Girdwood, Javier Martin and probably others. 9f19493a3SShawn Guo */ 10f19493a3SShawn Guo #include <linux/platform_device.h> 11f19493a3SShawn Guo #include <linux/dmaengine.h> 12f19493a3SShawn Guo #include <linux/types.h> 133c1c32d3SMark Brown #include <linux/module.h> 14f19493a3SShawn Guo 15f19493a3SShawn Guo #include <sound/core.h> 16f19493a3SShawn Guo #include <sound/pcm.h> 17f19493a3SShawn Guo #include <sound/soc.h> 18f19493a3SShawn Guo #include <sound/dmaengine_pcm.h> 19f19493a3SShawn Guo 20f19493a3SShawn Guo #include "imx-pcm.h" 21f19493a3SShawn Guo 22f19493a3SShawn Guo static bool filter(struct dma_chan *chan, void *param) 23f19493a3SShawn Guo { 24f19493a3SShawn Guo if (!imx_dma_is_general_purpose(chan)) 25f19493a3SShawn Guo return false; 26f19493a3SShawn Guo 2790130d2eSMark Brown chan->private = param; 28f19493a3SShawn Guo 29f19493a3SShawn Guo return true; 30f19493a3SShawn Guo } 31f19493a3SShawn Guo 32adaa3229SLars-Peter Clausen static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = { 33adaa3229SLars-Peter Clausen .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 34adaa3229SLars-Peter Clausen .compat_filter_fn = filter, 35f19493a3SShawn Guo }; 36f19493a3SShawn Guo 379b3ff637SSascha Hauer int imx_pcm_dma_init(struct platform_device *pdev) 38f19493a3SShawn Guo { 390d69e0ddSShengjiu Wang struct snd_dmaengine_pcm_config *config; 400d69e0ddSShengjiu Wang 410d69e0ddSShengjiu Wang config = devm_kzalloc(&pdev->dev, 420d69e0ddSShengjiu Wang sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL); 4310974ccfSJulia Lawall if (!config) 4410974ccfSJulia Lawall return -ENOMEM; 450d69e0ddSShengjiu Wang *config = imx_dmaengine_pcm_config; 460d69e0ddSShengjiu Wang 477e6d18acSLars-Peter Clausen return devm_snd_dmaengine_pcm_register(&pdev->dev, 480d69e0ddSShengjiu Wang config, 49adaa3229SLars-Peter Clausen SND_DMAENGINE_PCM_FLAG_COMPAT); 50adaa3229SLars-Peter Clausen } 51dbdf6b54SShawn Guo EXPORT_SYMBOL_GPL(imx_pcm_dma_init); 52adaa3229SLars-Peter Clausen 53*7478e15bSJeff Johnson MODULE_DESCRIPTION("Freescale i.MX PCM DMA interface"); 543c1c32d3SMark Brown MODULE_LICENSE("GPL"); 55