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Release 4.11 sound/soc/ux500/ux500_pcm.c

Directory: sound/soc/ux500
/*
 * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Ola Lilja12482.12%133.33%
Lars-Peter Clausen2214.57%133.33%
Lee Jones53.31%133.33%
Total151100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Fabio Baltieri10562.50%133.33%
Lee Jones6337.50%266.67%
Total168100.00%3100.00%

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_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; }

Contributors

PersonTokensPropCommitsCommitProp
Ola Lilja5459.34%125.00%
Lee Jones3437.36%250.00%
Lars-Peter Clausen33.30%125.00%
Total91100.00%4100.00%

EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);
int ux500_pcm_unregister_platform(struct platform_device *pdev) { snd_dmaengine_pcm_unregister(&pdev->dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ola Lilja1990.48%133.33%
Lee Jones14.76%133.33%
Lars-Peter Clausen14.76%133.33%
Total21100.00%3100.00%

EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);

Overall Contributors

PersonTokensPropCommitsCommitProp
Ola Lilja29650.08%110.00%
Lee Jones12821.66%550.00%
Fabio Baltieri11018.61%110.00%
Lars-Peter Clausen569.48%220.00%
Linus Walleij10.17%110.00%
Total591100.00%10100.00%
Directory: sound/soc/ux500
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