[linux-2.6-block.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_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,
	.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;
	u16 per_data_width, mem_data_width;
	struct stedma40_chan_cfg *dma_cfg;
	struct ux500_msp_dma_params *dma_params;

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

	mem_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES;

	switch (dma_params->data_size) {
	case 32:
		per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
		break;
	case 16:
		per_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
		break;
	case 8:
		per_data_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
		break;
	default:
		per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
	}

	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 int ux500_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct dma_slave_config *slave_config)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct msp_i2s_platform_data *pdata = rtd->cpu_dai->dev->platform_data;
	struct snd_dmaengine_dai_dma_data *snd_dma_params;
	struct ux500_msp_dma_params *ste_dma_params;
	dma_addr_t dma_addr;
	int ret;

	if (pdata) {
		ste_dma_params =
			snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
		dma_addr = ste_dma_params->tx_rx_addr;
	} else {
		snd_dma_params =
			snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
		dma_addr = snd_dma_params->addr;
	}

	ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
	if (ret)
		return ret;

	slave_config->dst_maxburst = 4;
	slave_config->src_maxburst = 4;

	slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
	slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		slave_config->dst_addr = dma_addr;
	else
		slave_config->src_addr = dma_addr;

	return 0;
}

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,
	.prepare_slave_config = ux500_pcm_prepare_slave_config,
};

static const struct snd_dmaengine_pcm_config ux500_dmaengine_of_pcm_config = {
	.compat_request_channel = ux500_pcm_request_chan,
	.prepare_slave_config = ux500_pcm_prepare_slave_config,
};

int ux500_pcm_register_platform(struct platform_device *pdev)
{
	const struct snd_dmaengine_pcm_config *pcm_config;
	struct device_node *np = pdev->dev.of_node;
	int ret;

	if (np)
		pcm_config = &ux500_dmaengine_of_pcm_config;
	else
		pcm_config = &ux500_dmaengine_pcm_config;

	ret = snd_dmaengine_pcm_register(&pdev->dev, pcm_config,
					 SND_DMAENGINE_PCM_FLAG_NO_RESIDUE |
					 SND_DMAENGINE_PCM_FLAG_COMPAT);
	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_PERIODS_BYTES_MIN 128
	32	#define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
	33	#define UX500_PLATFORM_PERIODS_MIN 2
	34	#define UX500_PLATFORM_PERIODS_MAX 48
	35	#define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
01a0c113	36
22f38f79	37	static const struct snd_pcm_hardware ux500_pcm_hw = {
01a0c113 OL	38	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	39	SNDRV_PCM_INFO_MMAP \|
	40	SNDRV_PCM_INFO_RESUME \|
	41	SNDRV_PCM_INFO_PAUSE,
01a0c113 OL	42	.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
	43	.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
	44	.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
	45	.periods_min = UX500_PLATFORM_PERIODS_MIN,
	46	.periods_max = UX500_PLATFORM_PERIODS_MAX,
	47	};
	48
22f38f79 LPC	49	static struct dma_chan ux500_pcm_request_chan(struct snd_soc_pcm_runtime rtd,
22f38f79 LPC	50	struct snd_pcm_substream *substream)
01a0c113	51	{
01a0c113	52	struct snd_soc_dai *dai = rtd->cpu_dai;
01a0c113 OL	53	u16 per_data_width, mem_data_width;
01a0c113 OL	54	struct stedma40_chan_cfg *dma_cfg;
22f38f79	55	struct ux500_msp_dma_params *dma_params;
01a0c113	56
22f38f79 LPC	57	dma_params = snd_soc_dai_get_dma_data(dai, substream);
22f38f79 LPC	58	dma_cfg = dma_params->dma_cfg;
01a0c113	59
43f2e1a3	60	mem_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
01a0c113	61
01a0c113 OL	62	switch (dma_params->data_size) {
01a0c113 OL	63	case 32:
43f2e1a3	64	per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
01a0c113 OL	65	break;
01a0c113 OL	66	case 16:
43f2e1a3	67	per_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
01a0c113 OL	68	break;
01a0c113 OL	69	case 8:
43f2e1a3	70	per_data_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
01a0c113 OL	71	break;
01a0c113 OL	72	default:
43f2e1a3	73	per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
01a0c113 OL	74	}
01a0c113 OL	75
01a0c113 OL	76	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	77	dma_cfg->src_info.data_width = mem_data_width;
	78	dma_cfg->dst_info.data_width = per_data_width;
	79	} else {
	80	dma_cfg->src_info.data_width = per_data_width;
	81	dma_cfg->dst_info.data_width = mem_data_width;
	82	}
	83
22f38f79	84	return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg);
01a0c113 OL	85	}
01a0c113 OL	86
eef6473f FB	87	static int ux500_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
	88	struct snd_pcm_hw_params *params,
	89	struct dma_slave_config *slave_config)
	90	{
	91	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f6c37752 LJ	92	struct msp_i2s_platform_data *pdata = rtd->cpu_dai->dev->platform_data;
	93	struct snd_dmaengine_dai_dma_data *snd_dma_params;
	94	struct ux500_msp_dma_params *ste_dma_params;
	95	dma_addr_t dma_addr;
eef6473f FB	96	int ret;
eef6473f FB	97
f6c37752 LJ	98	if (pdata) {
	99	ste_dma_params =
	100	snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
	101	dma_addr = ste_dma_params->tx_rx_addr;
	102	} else {
	103	snd_dma_params =
	104	snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
	105	dma_addr = snd_dma_params->addr;
	106	}
eef6473f FB	107
	108	ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
	109	if (ret)
	110	return ret;
	111
	112	slave_config->dst_maxburst = 4;
eef6473f	113	slave_config->src_maxburst = 4;
609a3050 LJ	114
	115	slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
	116	slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
eef6473f FB	117
eef6473f FB	118	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
f6c37752	119	slave_config->dst_addr = dma_addr;
eef6473f	120	else
f6c37752	121	slave_config->src_addr = dma_addr;
eef6473f FB	122
	123	return 0;
	124	}
	125
22f38f79 LPC	126	static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = {
	127	.pcm_hardware = &ux500_pcm_hw,
	128	.compat_request_channel = ux500_pcm_request_chan,
	129	.prealloc_buffer_size = 128 * 1024,
eef6473f	130	.prepare_slave_config = ux500_pcm_prepare_slave_config,
01a0c113 OL	131	};
01a0c113 OL	132
86a3fdfc LJ	133	static const struct snd_dmaengine_pcm_config ux500_dmaengine_of_pcm_config = {
	134	.compat_request_channel = ux500_pcm_request_chan,
	135	.prepare_slave_config = ux500_pcm_prepare_slave_config,
	136	};
	137
da794876	138	int ux500_pcm_register_platform(struct platform_device *pdev)
01a0c113	139	{
86a3fdfc LJ	140	const struct snd_dmaengine_pcm_config *pcm_config;
86a3fdfc LJ	141	struct device_node *np = pdev->dev.of_node;
01a0c113 OL	142	int ret;
01a0c113 OL	143
86a3fdfc LJ	144	if (np)
	145	pcm_config = &ux500_dmaengine_of_pcm_config;
	146	else
	147	pcm_config = &ux500_dmaengine_pcm_config;
	148
	149	ret = snd_dmaengine_pcm_register(&pdev->dev, pcm_config,
	150	SND_DMAENGINE_PCM_FLAG_NO_RESIDUE \|
	151	SND_DMAENGINE_PCM_FLAG_COMPAT);
01a0c113 OL	152	if (ret < 0) {
	153	dev_err(&pdev->dev,
	154	"%s: ERROR: Failed to register platform '%s' (%d)!\n",
	155	__func__, pdev->name, ret);
	156	return ret;
	157	}
	158
	159	return 0;
	160	}
1428c20f	161	EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);
01a0c113	162
da794876	163	int ux500_pcm_unregister_platform(struct platform_device *pdev)
01a0c113	164	{
22f38f79	165	snd_dmaengine_pcm_unregister(&pdev->dev);
01a0c113 OL	166	return 0;
01a0c113 OL	167	}
1428c20f	168	EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);