[deliverable/linux.git] / sound / soc / ux500 / ux500_pcm.c

/*
 * Copyright (C) ST-Ericsson SA 2012
 *
 * Author: Ola Lilja <ola.o.lilja@stericsson.com>,
 *         Roger Nilsson <roger.xr.nilsson@stericsson.com>
 *         for ST-Ericsson.
 *
 * License terms:
 *
 * 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 <asm/page.h>

#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/slab.h>
#include <linux/platform_data/dma-ste-dma40.h>

#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>

#include "ux500_msp_i2s.h"
#include "ux500_pcm.h"

#define UX500_PLATFORM_MIN_RATE 8000
#define UX500_PLATFORM_MAX_RATE 48000

#define UX500_PLATFORM_MIN_CHANNELS 1
#define UX500_PLATFORM_MAX_CHANNELS 8

#define UX500_PLATFORM_PERIODS_BYTES_MIN	128
#define UX500_PLATFORM_PERIODS_BYTES_MAX	(64 * PAGE_SIZE)
#define UX500_PLATFORM_PERIODS_MIN		2
#define UX500_PLATFORM_PERIODS_MAX		48
#define UX500_PLATFORM_BUFFER_BYTES_MAX		(2048 * PAGE_SIZE)

static const struct snd_pcm_hardware ux500_pcm_hw = {
	.info = SNDRV_PCM_INFO_INTERLEAVED |
		SNDRV_PCM_INFO_MMAP |
		SNDRV_PCM_INFO_RESUME |
		SNDRV_PCM_INFO_PAUSE,
	.formats = SNDRV_PCM_FMTBIT_S16_LE |
		SNDRV_PCM_FMTBIT_U16_LE |
		SNDRV_PCM_FMTBIT_S16_BE |
		SNDRV_PCM_FMTBIT_U16_BE,
	.rates = SNDRV_PCM_RATE_KNOT,
	.rate_min = UX500_PLATFORM_MIN_RATE,
	.rate_max = UX500_PLATFORM_MAX_RATE,
	.channels_min = UX500_PLATFORM_MIN_CHANNELS,
	.channels_max = UX500_PLATFORM_MAX_CHANNELS,
	.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
	.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
	.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
	.periods_min = UX500_PLATFORM_PERIODS_MIN,
	.periods_max = UX500_PLATFORM_PERIODS_MAX,
};

static struct dma_chan *ux500_pcm_request_chan(struct snd_soc_pcm_runtime *rtd,
	struct snd_pcm_substream *substream)
{
	struct snd_soc_dai *dai = rtd->cpu_dai;
	struct device *dev = dai->dev;
	u16 per_data_width, mem_data_width;
	struct stedma40_chan_cfg *dma_cfg;
	struct ux500_msp_dma_params *dma_params;

	dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
		snd_pcm_stream_str(substream));

	dma_params = snd_soc_dai_get_dma_data(dai, substream);
	dma_cfg = dma_params->dma_cfg;

	mem_data_width = STEDMA40_HALFWORD_WIDTH;

	switch (dma_params->data_size) {
	case 32:
		per_data_width = STEDMA40_WORD_WIDTH;
		break;
	case 16:
		per_data_width = STEDMA40_HALFWORD_WIDTH;
		break;
	case 8:
		per_data_width = STEDMA40_BYTE_WIDTH;
		break;
	default:
		per_data_width = STEDMA40_WORD_WIDTH;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		dma_cfg->src_info.data_width = mem_data_width;
		dma_cfg->dst_info.data_width = per_data_width;
	} else {
		dma_cfg->src_info.data_width = per_data_width;
		dma_cfg->dst_info.data_width = mem_data_width;
	}

	return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg);
}

static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = {
	.pcm_hardware = &ux500_pcm_hw,
	.compat_request_channel = ux500_pcm_request_chan,
	.prealloc_buffer_size = 128 * 1024,
};

int ux500_pcm_register_platform(struct platform_device *pdev)
{
	int ret;

	ret = snd_dmaengine_pcm_register(&pdev->dev,
			&ux500_dmaengine_pcm_config,
			SND_DMAENGINE_PCM_FLAG_NO_RESIDUE |
			SND_DMAENGINE_PCM_FLAG_COMPAT |
			SND_DMAENGINE_PCM_FLAG_NO_DT);
	if (ret < 0) {
		dev_err(&pdev->dev,
			"%s: ERROR: Failed to register platform '%s' (%d)!\n",
			__func__, pdev->name, ret);
		return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);

int ux500_pcm_unregister_platform(struct platform_device *pdev)
{
	snd_dmaengine_pcm_unregister(&pdev->dev);
	return 0;
}
EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);
Commit	Line	Data
01a0c113 OL	1	/*
	2	* Copyright (C) ST-Ericsson SA 2012
	3	*
	4	* Author: Ola Lilja <ola.o.lilja@stericsson.com>,
	5	* Roger Nilsson <roger.xr.nilsson@stericsson.com>
	6	* for ST-Ericsson.
	7	*
	8	* License terms:
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as published
	12	* by the Free Software Foundation.
	13	*/
	14
	15	#include <asm/page.h>
	16
	17	#include <linux/module.h>
	18	#include <linux/dma-mapping.h>
	19	#include <linux/dmaengine.h>
	20	#include <linux/slab.h>
865fab60	21	#include <linux/platform_data/dma-ste-dma40.h>
01a0c113 OL	22
	23	#include <sound/pcm.h>
	24	#include <sound/pcm_params.h>
	25	#include <sound/soc.h>
	26	#include <sound/dmaengine_pcm.h>
	27
	28	#include "ux500_msp_i2s.h"
	29	#include "ux500_pcm.h"
	30
69b6f196 LPC	31	#define UX500_PLATFORM_MIN_RATE 8000
	32	#define UX500_PLATFORM_MAX_RATE 48000
	33
	34	#define UX500_PLATFORM_MIN_CHANNELS 1
	35	#define UX500_PLATFORM_MAX_CHANNELS 8
	36
	37	#define UX500_PLATFORM_PERIODS_BYTES_MIN 128
	38	#define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
	39	#define UX500_PLATFORM_PERIODS_MIN 2
	40	#define UX500_PLATFORM_PERIODS_MAX 48
	41	#define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
01a0c113	42
22f38f79	43	static const struct snd_pcm_hardware ux500_pcm_hw = {
01a0c113 OL	44	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	45	SNDRV_PCM_INFO_MMAP \|
	46	SNDRV_PCM_INFO_RESUME \|
	47	SNDRV_PCM_INFO_PAUSE,
	48	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	49	SNDRV_PCM_FMTBIT_U16_LE \|
	50	SNDRV_PCM_FMTBIT_S16_BE \|
	51	SNDRV_PCM_FMTBIT_U16_BE,
	52	.rates = SNDRV_PCM_RATE_KNOT,
69b6f196 LPC	53	.rate_min = UX500_PLATFORM_MIN_RATE,
69b6f196 LPC	54	.rate_max = UX500_PLATFORM_MAX_RATE,
01a0c113 OL	55	.channels_min = UX500_PLATFORM_MIN_CHANNELS,
	56	.channels_max = UX500_PLATFORM_MAX_CHANNELS,
	57	.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
	58	.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
	59	.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
	60	.periods_min = UX500_PLATFORM_PERIODS_MIN,
	61	.periods_max = UX500_PLATFORM_PERIODS_MAX,
	62	};
	63
22f38f79 LPC	64	static struct dma_chan ux500_pcm_request_chan(struct snd_soc_pcm_runtime rtd,
22f38f79 LPC	65	struct snd_pcm_substream *substream)
01a0c113	66	{
01a0c113 OL	67	struct snd_soc_dai *dai = rtd->cpu_dai;
01a0c113 OL	68	struct device *dev = dai->dev;
01a0c113 OL	69	u16 per_data_width, mem_data_width;
01a0c113 OL	70	struct stedma40_chan_cfg *dma_cfg;
22f38f79	71	struct ux500_msp_dma_params *dma_params;
01a0c113 OL	72
	73	dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
	74	snd_pcm_stream_str(substream));
	75
22f38f79 LPC	76	dma_params = snd_soc_dai_get_dma_data(dai, substream);
22f38f79 LPC	77	dma_cfg = dma_params->dma_cfg;
01a0c113 OL	78
	79	mem_data_width = STEDMA40_HALFWORD_WIDTH;
	80
01a0c113 OL	81	switch (dma_params->data_size) {
	82	case 32:
	83	per_data_width = STEDMA40_WORD_WIDTH;
	84	break;
	85	case 16:
	86	per_data_width = STEDMA40_HALFWORD_WIDTH;
	87	break;
	88	case 8:
	89	per_data_width = STEDMA40_BYTE_WIDTH;
	90	break;
	91	default:
	92	per_data_width = STEDMA40_WORD_WIDTH;
01a0c113 OL	93	}
01a0c113 OL	94
01a0c113 OL	95	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	96	dma_cfg->src_info.data_width = mem_data_width;
	97	dma_cfg->dst_info.data_width = per_data_width;
	98	} else {
	99	dma_cfg->src_info.data_width = per_data_width;
	100	dma_cfg->dst_info.data_width = mem_data_width;
	101	}
	102
22f38f79	103	return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg);
01a0c113 OL	104	}
01a0c113 OL	105
22f38f79 LPC	106	static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = {
	107	.pcm_hardware = &ux500_pcm_hw,
	108	.compat_request_channel = ux500_pcm_request_chan,
	109	.prealloc_buffer_size = 128 * 1024,
01a0c113 OL	110	};
01a0c113 OL	111
da794876	112	int ux500_pcm_register_platform(struct platform_device *pdev)
01a0c113 OL	113	{
	114	int ret;
	115
22f38f79 LPC	116	ret = snd_dmaengine_pcm_register(&pdev->dev,
	117	&ux500_dmaengine_pcm_config,
	118	SND_DMAENGINE_PCM_FLAG_NO_RESIDUE \|
	119	SND_DMAENGINE_PCM_FLAG_COMPAT \|
	120	SND_DMAENGINE_PCM_FLAG_NO_DT);
01a0c113 OL	121	if (ret < 0) {
	122	dev_err(&pdev->dev,
	123	"%s: ERROR: Failed to register platform '%s' (%d)!\n",
	124	__func__, pdev->name, ret);
	125	return ret;
	126	}
	127
	128	return 0;
	129	}
1428c20f	130	EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);
01a0c113	131
da794876	132	int ux500_pcm_unregister_platform(struct platform_device *pdev)
01a0c113	133	{
22f38f79	134	snd_dmaengine_pcm_unregister(&pdev->dev);
01a0c113 OL	135	return 0;
01a0c113 OL	136	}
1428c20f	137	EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);