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ASoC: mmp: add audio dma support
mmp-pcm handle audio dma based on soc-dmaengine Support mmp and pxa910 Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com> Signed-off-by: Leo Yan <leoy@marvell.com> Signed-off-by: Qiao Zhou <zhouqiao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Zhangfei Gao
Mark Brown
parent
8994a5e1d2
commit
7a824e214e
22
include/linux/platform_data/mmp_audio.h
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22
include/linux/platform_data/mmp_audio.h
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@ -0,0 +1,22 @@
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/*
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* MMP Platform AUDIO Management
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*
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* Copyright (c) 2011 Marvell Semiconductors Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef MMP_AUDIO_H
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#define MMP_AUDIO_H
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struct mmp_audio_platdata {
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u32 period_max_capture;
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u32 buffer_max_capture;
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u32 period_max_playback;
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u32 buffer_max_playback;
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};
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#endif /* MMP_AUDIO_H */
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@ -8,6 +8,15 @@ config SND_PXA2XX_SOC
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the PXA2xx AC97, I2S or SSP interface. You will also need
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to select the audio interfaces to support below.
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config SND_MMP_SOC
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bool "Soc Audio for Marvell MMP chips"
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depends on ARCH_MMP
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select SND_SOC_DMAENGINE_PCM
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select SND_ARM
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help
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Say Y if you want to add support for codecs attached to
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the MMP SSPA interface.
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config SND_PXA2XX_AC97
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tristate
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select SND_AC97_CODEC
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@ -3,11 +3,13 @@ snd-soc-pxa2xx-objs := pxa2xx-pcm.o
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snd-soc-pxa2xx-ac97-objs := pxa2xx-ac97.o
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snd-soc-pxa2xx-i2s-objs := pxa2xx-i2s.o
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snd-soc-pxa-ssp-objs := pxa-ssp.o
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snd-soc-mmp-objs := mmp-pcm.o
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obj-$(CONFIG_SND_PXA2XX_SOC) += snd-soc-pxa2xx.o
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obj-$(CONFIG_SND_PXA2XX_SOC_AC97) += snd-soc-pxa2xx-ac97.o
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obj-$(CONFIG_SND_PXA2XX_SOC_I2S) += snd-soc-pxa2xx-i2s.o
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obj-$(CONFIG_SND_PXA_SOC_SSP) += snd-soc-pxa-ssp.o
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obj-$(CONFIG_SND_MMP_SOC) += snd-soc-mmp.o
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# PXA Machine Support
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snd-soc-corgi-objs := corgi.o
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297
sound/soc/pxa/mmp-pcm.c
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297
sound/soc/pxa/mmp-pcm.c
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@ -0,0 +1,297 @@
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/*
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* linux/sound/soc/pxa/mmp-pcm.c
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*
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* Copyright (C) 2011 Marvell International Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <linux/platform_data/mmp_audio.h>
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#include <sound/pxa2xx-lib.h>
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#include <sound/core.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 <mach/sram.h>
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#include <sound/dmaengine_pcm.h>
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struct mmp_dma_data {
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int ssp_id;
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struct resource *dma_res;
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};
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#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \
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SNDRV_PCM_INFO_MMAP_VALID | \
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SNDRV_PCM_INFO_INTERLEAVED | \
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SNDRV_PCM_INFO_PAUSE | \
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SNDRV_PCM_INFO_RESUME)
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#define MMP_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
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SNDRV_PCM_FMTBIT_S24_LE | \
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SNDRV_PCM_FMTBIT_S32_LE)
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static struct snd_pcm_hardware mmp_pcm_hardware[] = {
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{
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.info = MMP_PCM_INFO,
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.formats = MMP_PCM_FORMATS,
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.period_bytes_min = 1024,
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.period_bytes_max = 2048,
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.periods_min = 2,
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.periods_max = 32,
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.buffer_bytes_max = 4096,
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.fifo_size = 32,
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},
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{
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.info = MMP_PCM_INFO,
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.formats = MMP_PCM_FORMATS,
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.period_bytes_min = 1024,
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.period_bytes_max = 2048,
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.periods_min = 2,
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.periods_max = 32,
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.buffer_bytes_max = 4096,
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.fifo_size = 32,
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},
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};
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static int mmp_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct pxa2xx_pcm_dma_params *dma_params;
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struct dma_slave_config slave_config;
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int ret;
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dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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if (!dma_params)
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return 0;
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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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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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slave_config.dst_addr = dma_params->dev_addr;
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slave_config.dst_maxburst = 4;
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} else {
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slave_config.src_addr = dma_params->dev_addr;
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slave_config.src_maxburst = 4;
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}
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ret = dmaengine_slave_config(chan, &slave_config);
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if (ret)
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return ret;
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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return 0;
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}
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static bool filter(struct dma_chan *chan, void *param)
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{
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struct mmp_dma_data *dma_data = param;
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bool found = false;
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char *devname;
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devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
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dma_data->ssp_id);
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if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
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(chan->chan_id == dma_data->dma_res->start)) {
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found = true;
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}
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kfree(devname);
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return found;
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}
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static int mmp_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct platform_device *pdev = to_platform_device(rtd->platform->dev);
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct mmp_dma_data *dma_data;
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struct resource *r;
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int ret;
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r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
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if (!r)
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return -EBUSY;
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snd_soc_set_runtime_hwparams(substream,
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&mmp_pcm_hardware[substream->stream]);
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dma_data = devm_kzalloc(&pdev->dev,
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sizeof(struct mmp_dma_data), GFP_KERNEL);
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if (dma_data == NULL)
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return -ENOMEM;
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dma_data->dma_res = r;
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dma_data->ssp_id = cpu_dai->id;
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ret = snd_dmaengine_pcm_open(substream, filter, dma_data);
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if (ret) {
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devm_kfree(&pdev->dev, dma_data);
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return ret;
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}
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snd_dmaengine_pcm_set_data(substream, dma_data);
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return 0;
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}
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static int mmp_pcm_close(struct snd_pcm_substream *substream)
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{
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struct mmp_dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct platform_device *pdev = to_platform_device(rtd->platform->dev);
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snd_dmaengine_pcm_close(substream);
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devm_kfree(&pdev->dev, dma_data);
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return 0;
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}
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static int mmp_pcm_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned long off = vma->vm_pgoff;
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vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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return remap_pfn_range(vma, vma->vm_start,
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__phys_to_pfn(runtime->dma_addr) + off,
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vma->vm_end - vma->vm_start, vma->vm_page_prot);
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}
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struct snd_pcm_ops mmp_pcm_ops = {
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.open = mmp_pcm_open,
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.close = mmp_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = mmp_pcm_hw_params,
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.trigger = snd_dmaengine_pcm_trigger,
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.pointer = snd_dmaengine_pcm_pointer,
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.mmap = mmp_pcm_mmap,
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};
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static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm)
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{
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struct snd_pcm_substream *substream;
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struct snd_dma_buffer *buf;
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int stream;
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struct gen_pool *gpool;
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gpool = sram_get_gpool("asram");
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if (!gpool)
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return;
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for (stream = 0; stream < 2; stream++) {
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size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
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substream = pcm->streams[stream].substream;
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if (!substream)
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continue;
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buf = &substream->dma_buffer;
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if (!buf->area)
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continue;
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gen_pool_free(gpool, (unsigned long)buf->area, size);
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buf->area = NULL;
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}
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return;
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}
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static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
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int stream)
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{
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
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struct gen_pool *gpool;
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buf->dev.type = SNDRV_DMA_TYPE_DEV;
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buf->dev.dev = substream->pcm->card->dev;
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buf->private_data = NULL;
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gpool = sram_get_gpool("asram");
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if (!gpool)
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return -ENOMEM;
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buf->area = (unsigned char *)gen_pool_alloc(gpool, size);
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if (!buf->area)
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return -ENOMEM;
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buf->addr = gen_pool_virt_to_phys(gpool, (unsigned long)buf->area);
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buf->bytes = size;
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return 0;
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}
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int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_pcm_substream *substream;
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struct snd_pcm *pcm = rtd->pcm;
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int ret = 0, stream;
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for (stream = 0; stream < 2; stream++) {
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substream = pcm->streams[stream].substream;
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ret = mmp_pcm_preallocate_dma_buffer(substream, stream);
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if (ret)
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goto err;
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}
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return 0;
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err:
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mmp_pcm_free_dma_buffers(pcm);
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return ret;
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}
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struct snd_soc_platform_driver mmp_soc_platform = {
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.ops = &mmp_pcm_ops,
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.pcm_new = mmp_pcm_new,
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.pcm_free = mmp_pcm_free_dma_buffers,
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};
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static __devinit int mmp_pcm_probe(struct platform_device *pdev)
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{
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struct mmp_audio_platdata *pdata = pdev->dev.platform_data;
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if (pdata) {
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mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
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pdata->buffer_max_playback;
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mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
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pdata->period_max_playback;
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mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
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pdata->buffer_max_capture;
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mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
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pdata->period_max_capture;
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}
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return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform);
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}
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static int __devexit mmp_pcm_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_platform(&pdev->dev);
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return 0;
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}
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static struct platform_driver mmp_pcm_driver = {
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.driver = {
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.name = "mmp-pcm-audio",
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.owner = THIS_MODULE,
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},
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.probe = mmp_pcm_probe,
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.remove = __devexit_p(mmp_pcm_remove),
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};
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module_platform_driver(mmp_pcm_driver);
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MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
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MODULE_DESCRIPTION("MMP Soc Audio DMA module");
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MODULE_LICENSE("GPL");
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