Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * imx-pcm-dma-mx2.c  --  ALSA Soc Audio Layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * This code is based on code copyrighted by Freescale,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Liam Girdwood, Javier Martin and probably others.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/dmaengine.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <sound/soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <sound/dmaengine_pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "imx-pcm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static bool filter(struct dma_chan *chan, void *param)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	if (!imx_dma_is_general_purpose(chan))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	chan->private = param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	.compat_filter_fn = filter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	struct snd_dmaengine_pcm_config *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	config = devm_kzalloc(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 			sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	*config = imx_dmaengine_pcm_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	return devm_snd_dmaengine_pcm_register(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		SND_DMAENGINE_PCM_FLAG_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) EXPORT_SYMBOL_GPL(imx_pcm_dma_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) MODULE_LICENSE("GPL");