1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
 4 *
 5 * Author:	Nicolas Pitre
 6 * Created:	Nov 30, 2004
 7 * Copyright:	(C) 2004 MontaVista Software, Inc.
 
 
 
 
 8 */
 9
10#include <linux/dma-mapping.h>
11#include <linux/module.h>
12#include <linux/dmaengine.h>
13#include <linux/of.h>
14
15#include <sound/core.h>
16#include <sound/soc.h>
17#include <sound/pxa2xx-lib.h>
18#include <sound/dmaengine_pcm.h>
19
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
20static const struct snd_soc_component_driver pxa2xx_soc_platform = {
21	.pcm_construct	= pxa2xx_soc_pcm_new,
22	.open		= pxa2xx_soc_pcm_open,
23	.close		= pxa2xx_soc_pcm_close,
24	.hw_params	= pxa2xx_soc_pcm_hw_params,
25	.prepare	= pxa2xx_soc_pcm_prepare,
26	.trigger	= pxa2xx_soc_pcm_trigger,
27	.pointer	= pxa2xx_soc_pcm_pointer,
28};
29
30static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
31{
32	return devm_snd_soc_register_component(&pdev->dev, &pxa2xx_soc_platform,
33					       NULL, 0);
34}
35
 
 
 
 
 
 
 
 
36static struct platform_driver pxa_pcm_driver = {
37	.driver = {
38		.name = "pxa-pcm-audio",
 
39	},
40
41	.probe = pxa2xx_soc_platform_probe,
42};
43
44module_platform_driver(pxa_pcm_driver);
45
46MODULE_AUTHOR("Nicolas Pitre");
47MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
48MODULE_LICENSE("GPL");
49MODULE_ALIAS("platform:pxa-pcm-audio");

 
  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
 13#include <linux/dma-mapping.h>
 14#include <linux/module.h>
 15#include <linux/dmaengine.h>
 16#include <linux/of.h>
 17
 18#include <sound/core.h>
 19#include <sound/soc.h>
 20#include <sound/pxa2xx-lib.h>
 21#include <sound/dmaengine_pcm.h>
 22
 23#include "../../arm/pxa2xx-pcm.h"
 24
 25static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
 26	struct snd_pcm_hw_params *params)
 27{
 28	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 29	struct snd_dmaengine_dai_dma_data *dma;
 30
 31	dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 32
 33	/* return if this is a bufferless transfer e.g.
 34	 * codec <--> BT codec or GSM modem -- lg FIXME */
 35	if (!dma)
 36		return 0;
 37
 38	return __pxa2xx_pcm_hw_params(substream, params);
 39}
 40
 41static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
 42{
 43	__pxa2xx_pcm_hw_free(substream);
 44
 45	return 0;
 46}
 47
 48static const struct snd_pcm_ops pxa2xx_pcm_ops = {
 49	.open		= __pxa2xx_pcm_open,
 50	.close		= __pxa2xx_pcm_close,
 51	.ioctl		= snd_pcm_lib_ioctl,
 52	.hw_params	= pxa2xx_pcm_hw_params,
 53	.hw_free	= pxa2xx_pcm_hw_free,
 54	.prepare	= __pxa2xx_pcm_prepare,
 55	.trigger	= pxa2xx_pcm_trigger,
 56	.pointer	= pxa2xx_pcm_pointer,
 57	.mmap		= pxa2xx_pcm_mmap,
 58};
 59
 60static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
 61{
 62	struct snd_card *card = rtd->card->snd_card;
 63	struct snd_pcm *pcm = rtd->pcm;
 64	int ret;
 65
 66	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
 67	if (ret)
 68		return ret;
 69
 70	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
 71		ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
 72			SNDRV_PCM_STREAM_PLAYBACK);
 73		if (ret)
 74			goto out;
 75	}
 76
 77	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 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
 87static const struct snd_soc_component_driver pxa2xx_soc_platform = {
 88	.ops		= &pxa2xx_pcm_ops,
 89	.pcm_new	= pxa2xx_soc_pcm_new,
 90	.pcm_free	= pxa2xx_pcm_free_dma_buffers,
 
 
 
 
 91};
 92
 93static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
 94{
 95	return devm_snd_soc_register_component(&pdev->dev, &pxa2xx_soc_platform,
 96					       NULL, 0);
 97}
 98
 99#ifdef CONFIG_OF
100static const struct of_device_id snd_soc_pxa_audio_match[] = {
101	{ .compatible   = "mrvl,pxa-pcm-audio" },
102	{ }
103};
104MODULE_DEVICE_TABLE(of, snd_soc_pxa_audio_match);
105#endif
106
107static struct platform_driver pxa_pcm_driver = {
108	.driver = {
109		.name = "pxa-pcm-audio",
110		.of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
111	},
112
113	.probe = pxa2xx_soc_platform_probe,
114};
115
116module_platform_driver(pxa_pcm_driver);
117
118MODULE_AUTHOR("Nicolas Pitre");
119MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
120MODULE_LICENSE("GPL");
121MODULE_ALIAS("platform:pxa-pcm-audio");