Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * edma-pcm.c - eDMA PCM driver using dmaengine for AM3xxx, AM4xxx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2014 Texas Instruments, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Based on: sound/soc/tegra/tegra_pcm.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <sound/pcm_params.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <sound/soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <sound/dmaengine_pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "edma-pcm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static const struct snd_pcm_hardware edma_pcm_hardware = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	.info			= SNDRV_PCM_INFO_MMAP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 				  SNDRV_PCM_INFO_MMAP_VALID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 				  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 				  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 				  SNDRV_PCM_INFO_INTERLEAVED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	.buffer_bytes_max	= 128 * 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	.period_bytes_min	= 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	.period_bytes_max	= 64 * 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	.periods_min		= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	.periods_max		= 19, /* Limit by edma dmaengine driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static const struct snd_dmaengine_pcm_config edma_dmaengine_pcm_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	.pcm_hardware = &edma_pcm_hardware,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	.prealloc_buffer_size = 128 * 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int edma_pcm_platform_register(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	struct snd_dmaengine_pcm_config *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	if (dev->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		return devm_snd_dmaengine_pcm_register(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 						&edma_dmaengine_pcm_config, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	*config = edma_dmaengine_pcm_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	config->chan_names[0] = "tx";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	config->chan_names[1] = "rx";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	return devm_snd_dmaengine_pcm_register(dev, config, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) EXPORT_SYMBOL_GPL(edma_pcm_platform_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) MODULE_DESCRIPTION("eDMA PCM ASoC platform driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) MODULE_LICENSE("GPL");