Release 4.7 sound/soc/pxa/mmp-pcm.c
/*
* linux/sound/soc/pxa/mmp-pcm.c
*
* Copyright (C) 2011 Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/platform_data/dma-mmp_tdma.h>
#include <linux/platform_data/mmp_audio.h>
#include <sound/pxa2xx-lib.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
struct mmp_dma_data {
int ssp_id;
struct resource *dma_res;
};
#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \
SNDRV_PCM_INFO_MMAP_VALID | \
SNDRV_PCM_INFO_INTERLEAVED | \
SNDRV_PCM_INFO_PAUSE | \
SNDRV_PCM_INFO_RESUME | \
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
static struct snd_pcm_hardware mmp_pcm_hardware[] = {
{
.info = MMP_PCM_INFO,
.period_bytes_min = 1024,
.period_bytes_max = 2048,
.periods_min = 2,
.periods_max = 32,
.buffer_bytes_max = 4096,
.fifo_size = 32,
},
{
.info = MMP_PCM_INFO,
.period_bytes_min = 1024,
.period_bytes_max = 2048,
.periods_min = 2,
.periods_max = 32,
.buffer_bytes_max = 4096,
.fifo_size = 32,
},
};
static int mmp_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
struct dma_slave_config slave_config;
int ret;
ret =
snd_dmaengine_pcm_prepare_slave_config(substream, params,
&slave_config);
if (ret)
return ret;
ret = dmaengine_slave_config(chan, &slave_config);
if (ret)
return ret;
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 81 | 98.78% | 1 | 50.00% |
| qiao zhou | qiao zhou | 1 | 1.22% | 1 | 50.00% |
| Total | 82 | 100.00% | 2 | 100.00% |
static bool filter(struct dma_chan *chan, void *param)
{
struct mmp_dma_data *dma_data = param;
bool found = false;
char *devname;
devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
dma_data->ssp_id);
if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
(chan->chan_id == dma_data->dma_res->start)) {
found = true;
}
kfree(devname);
return found;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 96 | 100.00% | 1 | 100.00% |
| Total | 96 | 100.00% | 1 | 100.00% |
static int mmp_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct platform_device *pdev = to_platform_device(rtd->platform->dev);
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct mmp_dma_data dma_data;
struct resource *r;
r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
if (!r)
return -EBUSY;
snd_soc_set_runtime_hwparams(substream,
&mmp_pcm_hardware[substream->stream]);
dma_data.dma_res = r;
dma_data.ssp_id = cpu_dai->id;
return snd_dmaengine_pcm_open_request_chan(substream, filter,
&dma_data);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 108 | 96.43% | 1 | 33.33% |
| lars-peter clausen | lars-peter clausen | 4 | 3.57% | 2 | 66.67% |
| Total | 112 | 100.00% | 3 | 100.00% |
static int mmp_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long off = vma->vm_pgoff;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return remap_pfn_range(vma, vma->vm_start,
__phys_to_pfn(runtime->dma_addr) + off,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 75 | 100.00% | 1 | 100.00% |
| Total | 75 | 100.00% | 1 | 100.00% |
static struct snd_pcm_ops mmp_pcm_ops = {
.open = mmp_pcm_open,
.close = snd_dmaengine_pcm_close_release_chan,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = mmp_pcm_hw_params,
.trigger = snd_dmaengine_pcm_trigger,
.pointer = snd_dmaengine_pcm_pointer,
.mmap = mmp_pcm_mmap,
};
static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
struct snd_pcm_substream *substream;
struct snd_dma_buffer *buf;
int stream;
struct gen_pool *gpool;
gpool = sram_get_gpool("asram");
if (!gpool)
return;
for (stream = 0; stream < 2; stream++) {
size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
substream = pcm->streams[stream].substream;
if (!substream)
continue;
buf = &substream->dma_buffer;
if (!buf->area)
continue;
gen_pool_free(gpool, (unsigned long)buf->area, size);
buf->area = NULL;
}
return;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 121 | 100.00% | 1 | 100.00% |
| Total | 121 | 100.00% | 1 | 100.00% |
static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
int stream)
{
struct snd_dma_buffer *buf = &substream->dma_buffer;
size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
struct gen_pool *gpool;
buf->dev.type = SNDRV_DMA_TYPE_DEV;
buf->dev.dev = substream->pcm->card->dev;
buf->private_data = NULL;
gpool = sram_get_gpool("asram");
if (!gpool)
return -ENOMEM;
buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr);
if (!buf->area)
return -ENOMEM;
buf->bytes = size;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 113 | 94.96% | 1 | 50.00% |
| nicolin chen | nicolin chen | 6 | 5.04% | 1 | 50.00% |
| Total | 119 | 100.00% | 2 | 100.00% |
static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_pcm_substream *substream;
struct snd_pcm *pcm = rtd->pcm;
int ret = 0, stream;
for (stream = 0; stream < 2; stream++) {
substream = pcm->streams[stream].substream;
ret = mmp_pcm_preallocate_dma_buffer(substream, stream);
if (ret)
goto err;
}
return 0;
err:
mmp_pcm_free_dma_buffers(pcm);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 86 | 98.85% | 1 | 50.00% |
| lars-peter clausen | lars-peter clausen | 1 | 1.15% | 1 | 50.00% |
| Total | 87 | 100.00% | 2 | 100.00% |
static struct snd_soc_platform_driver mmp_soc_platform = {
.ops = &mmp_pcm_ops,
.pcm_new = mmp_pcm_new,
.pcm_free = mmp_pcm_free_dma_buffers,
};
static int mmp_pcm_probe(struct platform_device *pdev)
{
struct mmp_audio_platdata *pdata = pdev->dev.platform_data;
if (pdata) {
mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
pdata->buffer_max_playback;
mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
pdata->period_max_playback;
mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
pdata->buffer_max_capture;
mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
pdata->period_max_capture;
}
return devm_snd_soc_register_platform(&pdev->dev, &mmp_soc_platform);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 83 | 98.81% | 1 | 50.00% |
| axel lin | axel lin | 1 | 1.19% | 1 | 50.00% |
| Total | 84 | 100.00% | 2 | 100.00% |
static struct platform_driver mmp_pcm_driver = {
.driver = {
.name = "mmp-pcm-audio",
},
.probe = mmp_pcm_probe,
};
module_platform_driver(mmp_pcm_driver);
MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP Soc Audio DMA module");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mmp-pcm-audio");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 1005 | 97.57% | 1 | 10.00% |
| lars-peter clausen | lars-peter clausen | 8 | 0.78% | 3 | 30.00% |
| nicolin chen | nicolin chen | 6 | 0.58% | 1 | 10.00% |
| andrea adami | andrea adami | 5 | 0.49% | 1 | 10.00% |
| chris ball | chris ball | 3 | 0.29% | 1 | 10.00% |
| qiao zhou | qiao zhou | 2 | 0.19% | 2 | 20.00% |
| axel lin | axel lin | 1 | 0.10% | 1 | 10.00% |
| Total | 1030 | 100.00% | 10 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.