include/sound/designware_i2s.h

   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         unsigned int cap;
  42         int channel;
  43         u32 snd_fmts;
  44         u32 snd_rates;
  45
  46         void *play_dma_data;
  47         void *capture_dma_data;
  48         bool (*filter)(struct dma_chan *chan, void *slave);
  49         int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
  50 };
  51
  52 struct i2s_dma_data {
  53         void *data;
  54         dma_addr_t addr;
  55         u32 max_burst;
  56         enum dma_slave_buswidth addr_width;
  57         bool (*filter)(struct dma_chan *chan, void *slave);
  58 };
  59
  60 /* I2S DMA registers */
  61 #define I2S_RXDMA               0x01C0
  62 #define I2S_TXDMA               0x01C8
  63
  64 #define TWO_CHANNEL_SUPPORT     2       /* up to 2.0 */
  65 #define FOUR_CHANNEL_SUPPORT    4       /* up to 3.1 */
  66 #define SIX_CHANNEL_SUPPORT     6       /* up to 5.1 */
  67 #define EIGHT_CHANNEL_SUPPORT   8       /* up to 7.1 */
  68
  69 #endif /*  __SOUND_DESIGNWARE_I2S_H */