[mirror_ubuntu-bionic-kernel.git] / sound / soc / pxa / pxa2xx-pcm.c

/*
 * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
 *
 * Author:	Nicolas Pitre
 * Created:	Nov 30, 2004
 * Copyright:	(C) 2004 MontaVista Software, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/dmaengine.h>
#include <linux/of.h>

#include <sound/core.h>
#include <sound/soc.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>

#include "../../arm/pxa2xx-pcm.h"

static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_dmaengine_dai_dma_data *dma;

	dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);

	/* return if this is a bufferless transfer e.g.
	 * codec <--> BT codec or GSM modem -- lg FIXME */
	if (!dma)
		return 0;

	return __pxa2xx_pcm_hw_params(substream, params);
}

static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
{
	__pxa2xx_pcm_hw_free(substream);

	return 0;
}

static struct snd_pcm_ops pxa2xx_pcm_ops = {
	.open		= __pxa2xx_pcm_open,
	.close		= __pxa2xx_pcm_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= pxa2xx_pcm_hw_params,
	.hw_free	= pxa2xx_pcm_hw_free,
	.prepare	= __pxa2xx_pcm_prepare,
	.trigger	= pxa2xx_pcm_trigger,
	.pointer	= pxa2xx_pcm_pointer,
	.mmap		= pxa2xx_pcm_mmap,
};

static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret;

	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
		ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
			goto out;
	}

	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
			goto out;
	}
 out:
	return ret;
}

static struct snd_soc_platform_driver pxa2xx_soc_platform = {
	.ops 	= &pxa2xx_pcm_ops,
	.pcm_new	= pxa2xx_soc_pcm_new,
	.pcm_free	= pxa2xx_pcm_free_dma_buffers,
};

static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
{
	return devm_snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform);
}

#ifdef CONFIG_OF
static const struct of_device_id snd_soc_pxa_audio_match[] = {
	{ .compatible   = "mrvl,pxa-pcm-audio" },
	{ }
};
MODULE_DEVICE_TABLE(of, snd_soc_pxa_audio_match);
#endif

static struct platform_driver pxa_pcm_driver = {
	.driver = {
		.name = "pxa-pcm-audio",
		.of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
	},

	.probe = pxa2xx_soc_platform_probe,
};

module_platform_driver(pxa_pcm_driver);

MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa-pcm-audio");
Commit	Line	Data
f11a96d5 LG	1	/*
	2	* linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
	3	*
	4	* Author: Nicolas Pitre
	5	* Created: Nov 30, 2004
	6	* Copyright: (C) 2004 MontaVista Software, Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
f11a96d5	13	#include <linux/dma-mapping.h>
da155d5b	14	#include <linux/module.h>
d65a1458	15	#include <linux/dmaengine.h>
c529ca4a	16	#include <linux/of.h>
f11a96d5	17
f11a96d5	18	#include <sound/core.h>
f11a96d5	19	#include <sound/soc.h>
a6d77317	20	#include <sound/pxa2xx-lib.h>
d65a1458	21	#include <sound/dmaengine_pcm.h>
f11a96d5	22
a6d77317	23	#include "../../arm/pxa2xx-pcm.h"
f11a96d5 LG	24
	25	static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
	26	struct snd_pcm_hw_params *params)
	27	{
f11a96d5	28	struct snd_soc_pcm_runtime *rtd = substream->private_data;
d65a1458	29	struct snd_dmaengine_dai_dma_data *dma;
f11a96d5	30
f0fba2ad	31	dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
5f712b2b	32
a8f5d0a5 AJ	33	/* return if this is a bufferless transfer e.g.
a8f5d0a5 AJ	34	* codec <--> BT codec or GSM modem -- lg FIXME */
b32432e3 MB	35	if (!dma)
b32432e3 MB	36	return 0;
a8f5d0a5	37
a6d77317	38	return __pxa2xx_pcm_hw_params(substream, params);
f11a96d5 LG	39	}
	40
	41	static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
	42	{
a6d77317	43	__pxa2xx_pcm_hw_free(substream);
f11a96d5	44
f11a96d5 LG	45	return 0;
	46	}
	47
0e734ad5	48	static struct snd_pcm_ops pxa2xx_pcm_ops = {
a6d77317 DES	49	.open = __pxa2xx_pcm_open,
a6d77317 DES	50	.close = __pxa2xx_pcm_close,
f11a96d5 LG	51	.ioctl = snd_pcm_lib_ioctl,
	52	.hw_params = pxa2xx_pcm_hw_params,
	53	.hw_free = pxa2xx_pcm_hw_free,
a6d77317	54	.prepare = __pxa2xx_pcm_prepare,
f11a96d5 LG	55	.trigger = pxa2xx_pcm_trigger,
	56	.pointer = pxa2xx_pcm_pointer,
	57	.mmap = pxa2xx_pcm_mmap,
	58	};
	59
552d1ef6	60	static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
f11a96d5	61	{
552d1ef6	62	struct snd_card *card = rtd->card->snd_card;
552d1ef6	63	struct snd_pcm *pcm = rtd->pcm;
c9bd5e69	64	int ret;
f11a96d5	65
c9bd5e69 RK	66	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	67	if (ret)
	68	return ret;
f11a96d5	69
53dea36c	70	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
f11a96d5 LG	71	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
	72	SNDRV_PCM_STREAM_PLAYBACK);
	73	if (ret)
	74	goto out;
	75	}
	76
53dea36c	77	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
f11a96d5 LG	78	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
	79	SNDRV_PCM_STREAM_CAPTURE);
	80	if (ret)
	81	goto out;
	82	}
	83	out:
	84	return ret;
	85	}
	86
f0fba2ad LG	87	static struct snd_soc_platform_driver pxa2xx_soc_platform = {
f0fba2ad LG	88	.ops = &pxa2xx_pcm_ops,
8a33de9e	89	.pcm_new = pxa2xx_soc_pcm_new,
f11a96d5 LG	90	.pcm_free = pxa2xx_pcm_free_dma_buffers,
f11a96d5 LG	91	};
f11a96d5	92
570f6fe1	93	static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
958e792c	94	{
637c4497	95	return devm_snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform);
f0fba2ad LG	96	}
f0fba2ad LG	97
c529ca4a DM	98	#ifdef CONFIG_OF
	99	static const struct of_device_id snd_soc_pxa_audio_match[] = {
	100	{ .compatible = "mrvl,pxa-pcm-audio" },
	101	{ }
	102	};
baafd373	103	MODULE_DEVICE_TABLE(of, snd_soc_pxa_audio_match);
c529ca4a DM	104	#endif
c529ca4a DM	105
f0fba2ad LG	106	static struct platform_driver pxa_pcm_driver = {
f0fba2ad LG	107	.driver = {
c529ca4a	108	.name = "pxa-pcm-audio",
c529ca4a	109	.of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
f0fba2ad LG	110	},
	111
	112	.probe = pxa2xx_soc_platform_probe,
f0fba2ad LG	113	};
f0fba2ad LG	114
2f702a19	115	module_platform_driver(pxa_pcm_driver);
958e792c	116
f11a96d5 LG	117	MODULE_AUTHOR("Nicolas Pitre");
	118	MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
	119	MODULE_LICENSE("GPL");
e5b7d71a	120	MODULE_ALIAS("platform:pxa-pcm-audio");