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/*
* sound/soc/sprd/dai/sprd-dmaengine-pcm.h
*
* SpreadTrum DMA for the pcm stream.
*
* Copyright (C) 2012 SpreadTrum Ltd.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __SPRD_DMA_ENGINE_PCM_H
#define __SPRD_DMA_ENGINE_PCM_H
//#include <mach/dma.h>
//#include <sprd_dma.h>
#include <../../../drivers/dma/sprd_dma.h>
#include <linux/dmaengine.h>
#define VBC_PCM_FORMATS SNDRV_PCM_FMTBIT_S16_LE
#define VBC_FIFO_FRAME_NUM (160)
#define VBC_BUFFER_BYTES_MAX (128 * 1024)
#define I2S_BUFFER_BYTES_MAX (64 * 1024)
#define AUDIO_BUFFER_BYTES_MAX (VBC_BUFFER_BYTES_MAX + I2S_BUFFER_BYTES_MAX)
struct sprd_pcm_dma_params {
char *name; /* stream identifier */
int channels[2]; /* channel id */
int irq_type; /* dma interrupt type */
struct sprd_dma_cfg desc; /* dma description struct */
u32 dev_paddr[2]; /* device physical address for DMA */
};
static inline u32 sprd_pcm_dma_get_addr(struct dma_chan *dma_chn,
dma_cookie_t cookie, struct snd_pcm_substream *substream)
{
struct dma_tx_state dma_state;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dma_state.residue = SPRD_SRC_ADDR;
} else {
dma_state.residue = SPRD_DST_ADDR;
}
dmaengine_tx_status(dma_chn, cookie, &dma_state);
//printk(KERN_ERR "%s, residue:0x%x \n",__func__,dma_state.residue);
return dma_state.residue;
}
#endif /* __SPRD_DMA_ENGINE_PCM_H */
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