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![Christophe JAILLET](/assets/img/avatar_default.png)
The "Replace GPLv2 boilerplate/reference with SPDX" has left some empty "License terms" paragraphs. Remove them as well. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/84d94977c57deee9e85249f18394ebf8d72497bc.1653724723.git.christophe.jaillet@wanadoo.fr Signed-off-by: Mark Brown <broonie@kernel.org>
167 lines
4.7 KiB
C
167 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) ST-Ericsson SA 2012
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*
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* Author: Ola Lilja <ola.o.lilja@stericsson.com>,
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* Roger Nilsson <roger.xr.nilsson@stericsson.com>
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* for ST-Ericsson.
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*/
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#include <asm/page.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <linux/slab.h>
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#include <linux/platform_data/dma-ste-dma40.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include "ux500_msp_i2s.h"
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#include "ux500_pcm.h"
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#define UX500_PLATFORM_PERIODS_BYTES_MIN 128
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#define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
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#define UX500_PLATFORM_PERIODS_MIN 2
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#define UX500_PLATFORM_PERIODS_MAX 48
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#define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
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static const struct snd_pcm_hardware ux500_pcm_hw = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_PAUSE,
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.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
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.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
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.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
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.periods_min = UX500_PLATFORM_PERIODS_MIN,
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.periods_max = UX500_PLATFORM_PERIODS_MAX,
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};
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static struct dma_chan *ux500_pcm_request_chan(struct snd_soc_pcm_runtime *rtd,
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struct snd_pcm_substream *substream)
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{
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struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
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u16 per_data_width, mem_data_width;
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struct stedma40_chan_cfg *dma_cfg;
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struct ux500_msp_dma_params *dma_params;
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dma_params = snd_soc_dai_get_dma_data(dai, substream);
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dma_cfg = dma_params->dma_cfg;
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mem_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
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switch (dma_params->data_size) {
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case 32:
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per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
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break;
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case 16:
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per_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
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break;
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case 8:
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per_data_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
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break;
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default:
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per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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dma_cfg->src_info.data_width = mem_data_width;
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dma_cfg->dst_info.data_width = per_data_width;
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} else {
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dma_cfg->src_info.data_width = per_data_width;
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dma_cfg->dst_info.data_width = mem_data_width;
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}
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return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg);
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}
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static int ux500_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct dma_slave_config *slave_config)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct msp_i2s_platform_data *pdata = asoc_rtd_to_cpu(rtd, 0)->dev->platform_data;
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struct snd_dmaengine_dai_dma_data *snd_dma_params;
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struct ux500_msp_dma_params *ste_dma_params;
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dma_addr_t dma_addr;
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int ret;
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if (pdata) {
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ste_dma_params =
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snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
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dma_addr = ste_dma_params->tx_rx_addr;
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} else {
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snd_dma_params =
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snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
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dma_addr = snd_dma_params->addr;
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}
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ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
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if (ret)
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return ret;
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slave_config->dst_maxburst = 4;
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slave_config->src_maxburst = 4;
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slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
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slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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slave_config->dst_addr = dma_addr;
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else
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slave_config->src_addr = dma_addr;
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return 0;
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}
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static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = {
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.pcm_hardware = &ux500_pcm_hw,
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.compat_request_channel = ux500_pcm_request_chan,
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.prealloc_buffer_size = 128 * 1024,
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.prepare_slave_config = ux500_pcm_prepare_slave_config,
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};
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static const struct snd_dmaengine_pcm_config ux500_dmaengine_of_pcm_config = {
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.compat_request_channel = ux500_pcm_request_chan,
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.prepare_slave_config = ux500_pcm_prepare_slave_config,
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};
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int ux500_pcm_register_platform(struct platform_device *pdev)
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{
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const struct snd_dmaengine_pcm_config *pcm_config;
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struct device_node *np = pdev->dev.of_node;
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int ret;
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if (np)
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pcm_config = &ux500_dmaengine_of_pcm_config;
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else
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pcm_config = &ux500_dmaengine_pcm_config;
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ret = snd_dmaengine_pcm_register(&pdev->dev, pcm_config,
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SND_DMAENGINE_PCM_FLAG_COMPAT);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"%s: ERROR: Failed to register platform '%s' (%d)!\n",
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__func__, pdev->name, ret);
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);
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int ux500_pcm_unregister_platform(struct platform_device *pdev)
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{
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snd_dmaengine_pcm_unregister(&pdev->dev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);
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MODULE_AUTHOR("Ola Lilja");
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MODULE_AUTHOR("Roger Nilsson");
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MODULE_DESCRIPTION("ASoC UX500 driver");
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MODULE_LICENSE("GPL v2");
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