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/*++
* linux/sound/soc/wmt/wmt-soc.h
* WonderMedia audio driver for ALSA
*
* Copyright c 2010 WonderMedia Technologies, Inc.
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* WonderMedia Technologies, Inc.
* 4F, 533, Chung-Cheng Road, Hsin-Tien, Taipei 231, R.O.C
--*/
#ifndef __WMT_ASOC_H__
#define __WMT_ASOC_H__
#include <mach/dma.h>
struct audio_stream_a {
char *id; /* identification string */
int stream_id; /* numeric identification */
dmach_t dmach; /* DMA channel number */
struct dma_device_cfg_s dma_cfg; /* DMA device config */
int dma_dev; /* dma number of that device */
int dma_q_head; /* DMA Channel Q Head */
int dma_q_tail; /* DMA Channel Q Tail */
char dma_q_count; /* DMA Channel Q Count */
int active:1; /* we are using this stream for transfer now */
int period; /* current transfer period */
int periods; /* current count of periods registerd in the DMA engine */
spinlock_t dma_lock; /* for locking in DMA operations */
struct snd_pcm_substream *stream; /* the pcm stream */
unsigned linked:1; /* dma channels linked */
int offset; /* store start position of the last period in the alsa buffer */
snd_pcm_uframes_t last_offset;
};
#define NUM_LINKS 1
extern struct snd_soc_dai_driver wmt_i2s_dai;
#endif
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