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ASoC: davinci: replace private sram api with genalloc 

Removes the DaVinci private SRAM API and replaces it with
the genalloc API. The SRAM gen_pool is passed in pdata since
DaVinci is in the early stages of DT conversion.

[zonque@gmail.com: stub out gen_pool functions for
		   !CONFIG_GENERIC_ALLOCATOR]

Signed-off-by: Matt Porter <mporter@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Matt Porter 2012-10-17 16:08:03 +02:00 committed by Mark Brown
parent 6b7fa01157
commit b8ec56d8ea
4 changed files with 38 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/platform_data/davinci_asp.h
View File

@ -16,6 +16,8 @@
#ifndef __DAVINCI_ASP_H
#define __DAVINCI_ASP_H
#include <linux/genalloc.h>
struct snd_platform_data {
u32 tx_dma_offset;
u32 rx_dma_offset;
@ -30,6 +32,7 @@ struct snd_platform_data {
unsigned enable_channel_combine:1;
unsigned sram_size_playback;
unsigned sram_size_capture;
struct gen_pool *sram_pool;
/*
* If McBSP peripheral gets the clock from an external pin,

2
sound/soc/davinci/davinci-mcasp.c
View File

@ -1167,6 +1167,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
dma_data->asp_chan_q = pdata->asp_chan_q;
dma_data->ram_chan_q = pdata->ram_chan_q;
dma_data->sram_pool = pdata->sram_pool;
dma_data->sram_size = pdata->sram_size_playback;
dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
mem->start);
@ -1184,6 +1185,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
dma_data->asp_chan_q = pdata->asp_chan_q;
dma_data->ram_chan_q = pdata->ram_chan_q;
dma_data->sram_pool = pdata->sram_pool;
dma_data->sram_size = pdata->sram_size_capture;
dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
mem->start);

37
sound/soc/davinci/davinci-pcm.c
View File

@ -16,6 +16,7 @@
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/genalloc.h>
#include <sound/core.h>
#include <sound/pcm.h>
@ -23,7 +24,6 @@
#include <sound/soc.h>
#include <asm/dma.h>
#include <mach/sram.h>
#include "davinci-pcm.h"
@ -251,7 +251,9 @@ static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data)
}
}
static int allocate_sram(struct snd_pcm_substream *substream, unsigned size,
#ifdef CONFIG_GENERIC_ALLOCATOR
static int allocate_sram(struct snd_pcm_substream *substream,
struct gen_pool *sram_pool, unsigned size,
struct snd_pcm_hardware *ppcm)
{
struct snd_dma_buffer *buf = &substream->dma_buffer;
@ -263,9 +265,10 @@ static int allocate_sram(struct snd_pcm_substream *substream, unsigned size,
return 0;
ppcm->period_bytes_max = size;
iram_virt = sram_alloc(size, &iram_phys);
iram_virt = (void *)gen_pool_alloc(sram_pool, size);
if (!iram_virt)
goto exit1;
iram_phys = gen_pool_virt_to_phys(sram_pool, (unsigned)iram_virt);
iram_dma = kzalloc(sizeof(*iram_dma), GFP_KERNEL);
if (!iram_dma)
goto exit2;
@ -277,11 +280,33 @@ static int allocate_sram(struct snd_pcm_substream *substream, unsigned size,
return 0;
exit2:
if (iram_virt)
sram_free(iram_virt, size);
gen_pool_free(sram_pool, (unsigned)iram_virt, size);
exit1:
return -ENOMEM;
}
static void davinci_free_sram(struct snd_pcm_substream *substream,
struct snd_dma_buffer *iram_dma)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct gen_pool *sram_pool = prtd->params->sram_pool;
gen_pool_free(sram_pool, (unsigned) iram_dma->area, iram_dma->bytes);
}
#else
static int allocate_sram(struct snd_pcm_substream *substream,
struct gen_pool *sram_pool, unsigned size,
struct snd_pcm_hardware *ppcm)
{
return 0;
}
static void davinci_free_sram(struct snd_pcm_substream *substream,
struct snd_dma_buffer *iram_dma)
{
}
#endif
/*
* Only used with ping/pong.
* This is called after runtime->dma_addr, period_bytes and data_type are valid
@ -668,7 +693,7 @@ static int davinci_pcm_open(struct snd_pcm_substream *substream)
ppcm = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
&pcm_hardware_playback : &pcm_hardware_capture;
allocate_sram(substream, params->sram_size, ppcm);
allocate_sram(substream, params->sram_pool, params->sram_size, ppcm);
snd_soc_set_runtime_hwparams(substream, ppcm);
/* ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(runtime,
@ -811,7 +836,7 @@ static void davinci_pcm_free(struct snd_pcm *pcm)
buf->area = NULL;
iram_dma = buf->private_data;
if (iram_dma) {
sram_free(iram_dma->area, iram_dma->bytes);
davinci_free_sram(substream, iram_dma);
kfree(iram_dma);
}
}

2
sound/soc/davinci/davinci-pcm.h
View File

@ -12,6 +12,7 @@
#ifndef _DAVINCI_PCM_H
#define _DAVINCI_PCM_H
#include <linux/genalloc.h>
#include <linux/platform_data/davinci_asp.h>
#include <mach/edma.h>
@ -20,6 +21,7 @@ struct davinci_pcm_dma_params {
unsigned short acnt;
dma_addr_t dma_addr; /* device physical address for DMA */
unsigned sram_size;
struct gen_pool *sram_pool; /* SRAM gen_pool for ping pong */
enum dma_event_q asp_chan_q; /* event queue number for ASP channel */
enum dma_event_q ram_chan_q; /* event queue number for RAM channel */
unsigned char data_type; /* xfer data type */