Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *  Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *  Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <sound/pcm_params.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <sound/soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <sound/dmaengine_pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "sdma-pcm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static const struct snd_pcm_hardware sdma_pcm_hardware = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	.info			= SNDRV_PCM_INFO_MMAP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 				  SNDRV_PCM_INFO_MMAP_VALID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 				  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 				  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 				  SNDRV_PCM_INFO_INTERLEAVED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	.period_bytes_min	= 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	.period_bytes_max	= 64 * 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	.buffer_bytes_max	= 128 * 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	.periods_min		= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	.periods_max		= 255,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static const struct snd_dmaengine_pcm_config sdma_dmaengine_pcm_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	.pcm_hardware = &sdma_pcm_hardware,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	.prealloc_buffer_size = 128 * 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int sdma_pcm_platform_register(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 			       char *txdmachan, char *rxdmachan)
^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) 	unsigned int flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/* Standard names for the directions: 'tx' and 'rx' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (!txdmachan && !rxdmachan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return devm_snd_dmaengine_pcm_register(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 						&sdma_dmaengine_pcm_config, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	*config = sdma_dmaengine_pcm_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	if (!txdmachan || !rxdmachan) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		/* One direction only PCM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		flags |= SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		if (!txdmachan) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			txdmachan = rxdmachan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 			rxdmachan = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	config->chan_names[0] = txdmachan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	config->chan_names[1] = rxdmachan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	return devm_snd_dmaengine_pcm_register(dev, config, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) EXPORT_SYMBOL_GPL(sdma_pcm_platform_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) MODULE_DESCRIPTION("sDMA PCM ASoC platform driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) MODULE_LICENSE("GPL v2");