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ASoC: ti: Add udma-pcm platform driver for UDMA 

Platform driver glue for platforms using UDMA (am654 and j721e).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200210140950.11090-2-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2020-02-10 16:09:49 +02:00 committed by Mark Brown
parent ea00d95200
commit 2619e03703
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GPG Key ID: 24D68B725D5487D0
4 changed files with 67 additions and 0 deletions
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4
sound/soc/ti/Kconfig
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@ -10,6 +10,10 @@ config SND_SOC_TI_SDMA_PCM
tristate
select SND_SOC_GENERIC_DMAENGINE_PCM
config SND_SOC_TI_UDMA_PCM
tristate
select SND_SOC_GENERIC_DMAENGINE_PCM
comment "Texas Instruments DAI support for:"
config SND_SOC_DAVINCI_ASP
tristate "daVinci Audio Serial Port (ASP) or McBSP support"

2
sound/soc/ti/Makefile
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@ -3,9 +3,11 @@
# Platform drivers
snd-soc-ti-edma-objs := edma-pcm.o
snd-soc-ti-sdma-objs := sdma-pcm.o
snd-soc-ti-udma-objs := udma-pcm.o
obj-$(CONFIG_SND_SOC_TI_EDMA_PCM) += snd-soc-ti-edma.o
obj-$(CONFIG_SND_SOC_TI_SDMA_PCM) += snd-soc-ti-sdma.o
obj-$(CONFIG_SND_SOC_TI_UDMA_PCM) += snd-soc-ti-udma.o
# CPU DAI drivers
snd-soc-davinci-asp-objs := davinci-i2s.o

43
sound/soc/ti/udma-pcm.c Normal file
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@ -0,0 +1,43 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
*/
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
#include "udma-pcm.h"
static const struct snd_pcm_hardware udma_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
SNDRV_PCM_INFO_INTERLEAVED,
.buffer_bytes_max = SIZE_MAX,
.period_bytes_min = 32,
.period_bytes_max = SZ_64K,
.periods_min = 2,
.periods_max = UINT_MAX,
};
static const struct snd_dmaengine_pcm_config udma_dmaengine_pcm_config = {
.pcm_hardware = &udma_pcm_hardware,
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
};
int udma_pcm_platform_register(struct device *dev)
{
return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
0);
}
EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
MODULE_LICENSE("GPL v2");

18
sound/soc/ti/udma-pcm.h Normal file
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@ -0,0 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
*/
#ifndef __UDMA_PCM_H__
#define __UDMA_PCM_H__
#if IS_ENABLED(CONFIG_SND_SOC_TI_UDMA_PCM)
int udma_pcm_platform_register(struct device *dev);
#else
static inline int udma_pcm_platform_register(struct device *dev)
{
return 0;
}
#endif /* CONFIG_SND_SOC_TI_UDMA_PCM */
#endif /* __UDMA_PCM_H__ */