designware_i2s.h
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/*
* Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SOUND_DESIGNWARE_I2S_H
#define __SOUND_DESIGNWARE_I2S_H
#include <linux/dmaengine.h>
#include <linux/types.h>
/*
* struct i2s_clk_config_data - represent i2s clk configuration data
* @chan_nr: number of channel
* @data_width: number of bits per sample (8/16/24/32 bit)
* @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz)
*/
struct i2s_clk_config_data {
int chan_nr;
u32 data_width;
u32 sample_rate;
};
struct i2s_platform_data {
#define DWC_I2S_PLAY (1 << 0)
#define DWC_I2S_RECORD (1 << 1)
#define DW_I2S_SLAVE (1 << 2)
#define DW_I2S_MASTER (1 << 3)
unsigned int cap;
int channel;
u32 snd_fmts;
u32 snd_rates;
void *play_dma_data;
void *capture_dma_data;
bool (*filter)(struct dma_chan *chan, void *slave);
int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
};
struct i2s_dma_data {
void *data;
dma_addr_t addr;
u32 max_burst;
enum dma_slave_buswidth addr_width;
bool (*filter)(struct dma_chan *chan, void *slave);
};
/* I2S DMA registers */
#define I2S_RXDMA 0x01C0
#define I2S_TXDMA 0x01C8
#define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */
#define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */
#define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */
#define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */
#endif /* __SOUND_DESIGNWARE_I2S_H */