18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * This code is based on code copyrighted by Freescale, 88c2ecf20Sopenharmony_ci * Liam Girdwood, Javier Martin and probably others. 98c2ecf20Sopenharmony_ci */ 108c2ecf20Sopenharmony_ci#include <linux/platform_device.h> 118c2ecf20Sopenharmony_ci#include <linux/dmaengine.h> 128c2ecf20Sopenharmony_ci#include <linux/types.h> 138c2ecf20Sopenharmony_ci#include <linux/module.h> 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci#include <sound/core.h> 168c2ecf20Sopenharmony_ci#include <sound/pcm.h> 178c2ecf20Sopenharmony_ci#include <sound/soc.h> 188c2ecf20Sopenharmony_ci#include <sound/dmaengine_pcm.h> 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci#include "imx-pcm.h" 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_cistatic bool filter(struct dma_chan *chan, void *param) 238c2ecf20Sopenharmony_ci{ 248c2ecf20Sopenharmony_ci if (!imx_dma_is_general_purpose(chan)) 258c2ecf20Sopenharmony_ci return false; 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_ci chan->private = param; 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ci return true; 308c2ecf20Sopenharmony_ci} 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_cistatic const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = { 338c2ecf20Sopenharmony_ci .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 348c2ecf20Sopenharmony_ci .compat_filter_fn = filter, 358c2ecf20Sopenharmony_ci}; 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ciint imx_pcm_dma_init(struct platform_device *pdev, size_t size) 388c2ecf20Sopenharmony_ci{ 398c2ecf20Sopenharmony_ci struct snd_dmaengine_pcm_config *config; 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci config = devm_kzalloc(&pdev->dev, 428c2ecf20Sopenharmony_ci sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL); 438c2ecf20Sopenharmony_ci if (!config) 448c2ecf20Sopenharmony_ci return -ENOMEM; 458c2ecf20Sopenharmony_ci *config = imx_dmaengine_pcm_config; 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ci return devm_snd_dmaengine_pcm_register(&pdev->dev, 488c2ecf20Sopenharmony_ci config, 498c2ecf20Sopenharmony_ci SND_DMAENGINE_PCM_FLAG_COMPAT); 508c2ecf20Sopenharmony_ci} 518c2ecf20Sopenharmony_ciEXPORT_SYMBOL_GPL(imx_pcm_dma_init); 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ciMODULE_LICENSE("GPL"); 54