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TOMOYO Linux Cross Reference
Linux/include/sound/designware_i2s.h

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  1 /*
  2  * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License as published by
  6  * the Free Software Foundation; either version 2 of the License, or
  7  * (at your option) any later version.
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 12  * GNU General Public License for more details.
 13  *
 14  * You should have received a copy of the GNU General Public License
 15  * along with this program; if not, write to the Free Software
 16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 17  *
 18  */
 19 
 20 #ifndef __SOUND_DESIGNWARE_I2S_H
 21 #define __SOUND_DESIGNWARE_I2S_H
 22 
 23 #include <linux/dmaengine.h>
 24 #include <linux/types.h>
 25 
 26 /*
 27  * struct i2s_clk_config_data - represent i2s clk configuration data
 28  * @chan_nr: number of channel
 29  * @data_width: number of bits per sample (8/16/24/32 bit)
 30  * @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz)
 31  */
 32 struct i2s_clk_config_data {
 33         int chan_nr;
 34         u32 data_width;
 35         u32 sample_rate;
 36 };
 37 
 38 struct i2s_platform_data {
 39         #define DWC_I2S_PLAY    (1 << 0)
 40         #define DWC_I2S_RECORD  (1 << 1)
 41         #define DW_I2S_SLAVE    (1 << 2)
 42         #define DW_I2S_MASTER   (1 << 3)
 43         unsigned int cap;
 44         int channel;
 45         u32 snd_fmts;
 46         u32 snd_rates;
 47 
 48         #define DW_I2S_QUIRK_COMP_REG_OFFSET    (1 << 0)
 49         #define DW_I2S_QUIRK_COMP_PARAM1        (1 << 1)
 50         #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2)
 51         unsigned int quirks;
 52         unsigned int i2s_reg_comp1;
 53         unsigned int i2s_reg_comp2;
 54 
 55         void *play_dma_data;
 56         void *capture_dma_data;
 57         bool (*filter)(struct dma_chan *chan, void *slave);
 58         int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
 59 };
 60 
 61 struct i2s_dma_data {
 62         void *data;
 63         dma_addr_t addr;
 64         u32 max_burst;
 65         enum dma_slave_buswidth addr_width;
 66         bool (*filter)(struct dma_chan *chan, void *slave);
 67 };
 68 
 69 /* I2S DMA registers */
 70 #define I2S_RXDMA               0x01C0
 71 #define I2S_TXDMA               0x01C8
 72 
 73 #define TWO_CHANNEL_SUPPORT     2       /* up to 2.0 */
 74 #define FOUR_CHANNEL_SUPPORT    4       /* up to 3.1 */
 75 #define SIX_CHANNEL_SUPPORT     6       /* up to 5.1 */
 76 #define EIGHT_CHANNEL_SUPPORT   8       /* up to 7.1 */
 77 
 78 #endif /*  __SOUND_DESIGNWARE_I2S_H */
 79 

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